The DARHT II accelerator at LANL is preparing a series of preliminary tests at the reduced voltage of 7.8 MeV. The transport hardware between the end of the accelerator and the final target magnet was shipped to LLNL and installed on ETA II. Using the ETA...

The authors describe searches for decays of B mesons to the charmless final states {eta}'{eta}'K. The data consist of 228 million B{bar B} pairs produced in e{sup +}e{sup -} annihilation, collected with the BABAR detector at the Stanford Linear Accelerator Center. The 90% confidence level upper limits for the ...

... joint planning, national and international ... ETA (Experimental Test Accelerator) Beam Channel. ... BEAMS, *PARTICLE ACCELERATORS, RADIATION ...

We describe studies of the decays of B mesons to final states {eta}K{sup *}(892), {eta}K{sup *}{sub 0}(S-wave), {eta}K{sup *}{sub 2}(1430), and {eta}'K based on data collected with the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} collier at the Stanford Linear ...

The DARHT II accelerator at LANL is preparing a series of preliminary tests at the reduced voltage of 7.8 MeV. The transport hardware between the end of the accelerator and the final target magnet was shipped to LLNL and installed on ETA II. Using the ETA II beam at 5.2 MeV we completed a set ...

Emittance measurements on beams produced by the ETA and ATA accelerators are discussed. Emittance and brightness are defined. The significance of emittance for a beam in an accelerator and in gas is discussed. Various measurement techniques and results are presented and contrasted. Implicit calculations of emittance are also reported. ...

We present measurements of B-meson decays to the final states {eta}{prime} {rho}, {eta}{prime} f{sub 0}, and {eta}{prime} K*, where K* stands for a vector, scalar, or tensor strange meson. We observe a significant signal or evidence for {eta}{prime} {rho}{sup +} and all the ...

We present measurements of branching fractions for five B-meson decays to two-body charmless final states. The data, collected with the BABAR detector at the Stanford Linear Accelerator Center, represent 459x10{sup 6} BB pairs. The results for branching fractions are, in units of 10{sup -6} (upper limits at 90% C.L.), B(B{sup ...

The authors present measurements of branching fractions for five B-meson decays to two-body charmless final states. The data, collected with the BABAR detector at the Stanford Linear Accelerator Center, represent 459 million B{bar B} pairs. The results for branching fractions are, in units of 10{sup -6} (upper limits at 90% C.L.): {Beta}(B{sup +} {yields} ...

We describe searches for decays to two-body charmless final states {eta}'{eta}, {eta}'{pi}{sup 0} and {eta}{pi}{sup 0} of B{sup 0} mesons produced in e{sup +}e{sup -} annihilation. The data, collected with the BABAR detector at the Stanford Linear Accelerator Center, represent ...

Photoproduction of(eta) and(eta)(prime) mesons has been studied at the Continuous Electron Beam Accelerator Facility (CEBAF) Large Acceptance Spectrometer (CLAS) using a tagged photon beam incident on a hydrogen target with photon energies from the respec...

The idea that the ? meson could form a bound system with nucleus was put forward long ago by Q.Haider and L.C.Liu and was based on the observation that the low energy ?-nucleon interaction was attractive. Since then a number of theoretical calculations have been performed to the predict eta-nucleus bound states. Such bound states-the so called "eta-mesic ...

Improvements have been made in the performance of the ETA-II accelerator that allow a nominal 2 kA, 6 MeV beam to be focused to a spot size less that 1 mm in diameter. The improvements include reducing the energy sweep to less than +/- 0.5 & over 40 ns of the pulse using a real time energy diagnostic and improving the magnetic tune of the ...

Using a data sample of 58x10{sup 6} J/{psi} decays collected with the Beijing Spectrometer II detector at the Beijing Electron Positron Collider, searches for invisible decays of {eta} and {eta}{sup '} in J/{psi} to {phi}{eta} and {phi}{eta}{sup '} are performed. The {phi} signals, which are ...

inverse-compton scattering from fermi-accelerated electrons. New Purpose: To see if Eta Car is an X-ray source during the next event (due to launch delay) ...

Improvements have been made in the performance of the ETA-II accelerator that allow a nominal 2 kA, 6 MeV beam to be focused to a spot size less that 1 mm in diameter. The improvements include reducing the energy sweep to less than +/- 0.5 & over 40 ns of the pulse using a real time energy diagnostic and improving the magnetic tune of the ...

We present measurements of branching fractions and charge asymmetries for six B-meson decay modes with an {eta} or {eta}{prime} meson in the final state. The data sample corresponds to 232 million B{bar B} pairs collected with the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} B Factory at SLAC.

The 10 kA ETA and ATA linear induction accelerators are described. Beam instability is the major concern in these high current machines, and the current status of theoretical understanding, and experimental investigations with the 8 cavity ETA, are reviewed. Modifications to the induction cavities are described that have essentially ...

The authors report results on the branching fraction (BF) measurement of the color-suppressed decays {bar B}{sup 0} {yields} D{sup 0}{pi}{sup 0}, D*{sup 0}{pi}{sup 0}, D{sup 0}{eta}, D*{sup 0}{eta}, D{sup 0}{omega}, D*{sup 0}{omega}, D{sup 0}{eta}{prime}, and D*{sup 0}{eta}{prime}. They measure the branching ...

We present measurements of time-dependent CP asymmetries of neutral B decays to several charm and charmonium final states. Data have been collected with the BABAR detector at the PEP-II storage ring at the Stanford Linear Accelerator Center. In the absence of penguin contribution, the Standard Model predicts the time-dependent CP asymmetry parameters S and ...

Decay channels of the {eta} meson with at least one lepton pair in the final state are discussed. Preliminary results on lepton pair production from the pd{yields}{sup 3}He{eta} reaction from the WASA experiment at CELSIUS are presented.

Some aspects of physics that contributed to design and operation of the ETA 10 kAmp electron accelerator are discussed. These include: the electron source, the emittance growth in the injector, beam transport through the accelerator, and the influence of the beam breakup accelerator instability.

The experiments performed on the ETA during the months of September through October of 1984 were intended to accomplish two objectives; to discover or develop a source capable of producing an electron beam whose brightness is substantially higher than that of previous sources, and to determine, if possible, the mechanisms which limit the source brightness so that further ...

Flux line alignment of the solenoidal focus magnets used on the ETA-II linear induction accelerator is a key element leading to a reduction of beam corkscrew motion. Two techniques have been used on the ETA-II accelerator to measure and establish magnet a...

We describe searches for B{sup 0} meson decays to the charmless final states {pi}{sup 0}K{sub S}{sup 0}K{sub S}{sup 0}, {eta}K{sub S}{sup 0}K{sub S}{sup 0}, and {eta}{prime}K{sub S}{sup 0}K{sub S}{sup 0}. The data sample corresponds to 467 x 10{sup 6} B{bar B} pairs produced in e{sup +}e{sup -} annihilation and collected with the BABAR ...

Incoherent photoproduction of the {eta} meson on the deuteron is studied for photon energies from threshold to 800 MeV. The dominant contribution, the {gamma}N-{eta}N amplitude, is described within an isobar model. The final state interaction derived from the CD-Bonn potential is included and found to be important for the description ...

The authors provide a cautionary note on reporting accurate eta-squared values from multifactor analysis of variance (ANOVA) designs. They reinforce the distinction between classical and partial eta-squared as measures of strength of association. They provide examples from articles published in premier psychology journals in which the authors erroneously ...

We propose a sum rule connecting radiative decay modes of eta''( the charmed partner of eta and eta', and presumably the 2..gamma.. resonance at 2.8 GeV). The sum rule should allow a determination of the percentage of charmed quarks in the ..omega.. and phi mesons. If the percentage of charmed quarks in the ...

ATA is a pulsed, 50 ns 10 KA, 50 MeV linear induction electron accelerator at LLNL. The ETA could be used as an injector for ATA. However the possibility of building a new injector gun for ATA, raised the question as to what changes from the ETA gun in el...

Using a sample of 3x10{sup 6} {psi}(2S) decays collected by the CLEO III and CLEO-c detector configurations, we present results of a study of {chi}{sub c0} and {chi}{sub c2} decays into {eta}{eta}, {eta}{eta}{sup '}, and {eta}{sup '}{eta}{sup '} final states. We find ...

High current electron beams have been used as x-ray drivers for x-ray radiography. Typically, several thousand amperes of electron beam current at 20 MeV is focused to a millimeter spot size on a x-ray converter. Within a single pulse, the heating of the target by the electron beam will lead to rapid desorption of surface contaminants. The space charge potential of the electron beam will pull ions ...

A sample of 35,000 events of the type pi-p --> eta'pi-p_slow (eta' --> eta pi-pi+, eta --> gamma gamma) with -t>0.1 GeV^2/c^2 was selected from COMPASS 2008 data for a partial-wave analysis. We study the broad P_+ structure known from previous experiments at lower energies, in particular its phase ...

Techniques useful for generating and conditioning power for high energy pulsed accelerators with potential weapon applications are described. Pulsed electron accelerators are exemplified by ETA and ATA at Lawrence Livermore Laboratories and RADLAC at Sand...

Effects of Linac transverse wakefields are combined with residual eta and partially compressed bunches (presently the SLC design) to place much tighter, current dependent limits on residual eta and eta'. The limits are comparable to or exceed those needed at the SLC final focus. These limits will be ...

We present updated measurements of the branching fractions for B{sup 0} meson decays to {eta}K{sup 0}, {eta}{eta}, {eta}{phi}, {eta}{omega}, {eta}{sup '}K{sup 0}, {eta}{sup '}{eta}{sup '}, {eta}{sup ...

The authors present updated measurements of the branching fractions for B{sup 0} meson decays to {eta}K{sup 0}, {eta}{eta}, {eta}{phi}, {eta}{omega}, {eta}{prime}K{sup 0}, {eta}{prime}{eta}{prime}, {eta}{prime}, {phi}, and ...

... HARMONIC ACCELERATION FINAL INDEPENDENT DEVELOPMENT REPORT ... HYDRODYNAMIC EFFECTS OF HARMONIC ACCELERATION ...

Flux line alignment of the solenoidal focus magnets used on the ETA-II linear induction accelerator is a key element leading to a reduction of beam corkscrew motion. Two techniques have been used on the ETA-II accelerator to measure and establish magnet alignment. A low energy electron beam has been used to ...

Quasifree photoproduction of eta mesons off nucleons bound in the deuteron has been measured with the CBELSA/TAPS detector for incident photon energies up to 2.5 GeV at the Bonn ELSA accelerator. The eta mesons have been detected in coincidence with recoil protons and recoil neutrons, which allows a detailed comparison of the quasifree ...

Using 281 pb{sup -1} of data collected with the CLEO-c detector, we present new measurements of Cabibbo-suppressed decays of D{sup 0} and D{sup +} mesons to {eta} and {eta}{sup '} final states. We make first observations of D{sup 0}{yields}{eta}{sup '}{pi}{sup 0}, {eta}{eta}, ...

A new design for an induction accelerator for FELs is proposed. The operation of the accelerator, which is based on Faraday's laws, is discussed. The use of an oxide or a dispenser cathode for the high-brightness injector of the accelerator is examined. The designs of the induction cells and nonlinear magnetic pulse compressor ...

We present measurements of the branching fractions for B{sup 0}-meson decays to {eta}{sup '}K{sup 0} and {omega}K{sup 0}, and of the branching fractions and CP-violation charge asymmetries for B{sup +}-meson decays to {eta}{pi}{sup +}, {eta}K{sup +}, {eta}{sup '}{pi}{sup +}, ...

The authors present measurements of the branching fractions for B{sup 0} meson decays to {eta}{prime}K{sup 0} and {omega}K{sup 0}, and of the branching fractions and CP-violation charge asymmetries for B{sup +} meson decays to {eta}{pi}{sup +}, {eta}K{sup +}, {eta}{prime}{pi}{sup +}, ...

This report summarizes the Accelerated Reliability testing of five lead-acid battery-equipped Chevrolet S-10 electric vehicles by the US Department of Energy's Field Operations Program and the Program's testing partners, Electric Transportation Applications (ETA) and Southern California Edison (SCE). ETA and SCE ...

Radiative decays of the {psi}(2S) into {gamma}KK{pi} and {gamma}{eta}{pi}{sup +}{pi}{sup -} final states are studied using 14x10{sup 6} {psi}(2S) events collected with the BESII detector. Branching fractions or upper limits on the branching fractions of {psi}(2S) and {chi}{sub cJ} decays are reported. No significant signal for ...

The Lawrence Livermore Laboratory is currently constructing a new linear induction accelerator with a higher beam current than the Astron accelerator. The new accelerator, called the Experimental Test Accelerator (ETA) will be a 5-MeV, 10-kA accelerator with a pulse width ...

The Experimental Test Accelerator (ETA) II is a new, high-average- power, linear induction accelerator built at Lawrence Livermore National Laboratory to support Free-Electron-Lasers (FEL), research. ETA-II will also be used as a source of high-power microwaves for plasma heating experiments on the Microwave ...

Results are reported on the production of two- and four-hadron final states, and on the formation of the eta, eta' and f mesons in photon-photon collisions. 14 refs., 13 figs.

The complexation of Ln(III) ions by the meso-octaethylporphyrinogen [Et(8)N(4)H(4)], 1, has been achieved by reacting the sodium derivative [Et(8)N(4)Na(4).THF(3)], 2, with [LnCl(3).THF(2)]. Depending on the reaction or crystallization solvent, a variety of structural categories of Ln-porphyrinogen complexes have been isolated and structurally characterized. When the reaction was carried out in ...

The electromagnetic fields in the immediate vicinity of the Experimental Test Accelerator (ETA) at the Lawrence Livermore Laboratory have been characterized. Various EM sensors that cover the frequency band from the very low frequencies up into the GHz region have been used. The report describes in detail the probes, the test set-up and the data processing ...

A pulsed electron accelerator has been constructed and is now in operation at the Lawrence Livermore Laboratory. This Experimental Test Accelerator (ETA) a 5 MeV, 10 kA, 50 ns FWHM, five pulse burst at 1 kHz, was designed to be the front end or injector f...

The Experimental Test Accelerator (ETA) is designed to produce a 10 kAmp electron beam at an energy of 4.5 MeV in 40 nsec pulses at an average rate of 2 pps. The accelerator also operates in bursts of 5 pulses spaced by as little as one millisec at an average rate of 5 pps. The machine is currently operating near 80% of its design ...

In order to accelerate cosmic rays to ultra high energy, >10{sup 18} ev, requires that the step size in energy in a diffusive process be very much larger than occurs in galactic or extra galactic hydrodynamic mechanisms where {Delta}E/F {approximately} v/c{approximately}1/300 per step. This step size requires >10{sup 5} scatterings per doubling in energy (the shock ...

We study the charmless decays B{yields}K{sub h{eta}} and B{yields}K{sub h{eta}}{sup '} within the framework of QCD factorization (QCDF) for K{sub h}=K, K{sup *}, K{sub 0}{sup *}(1430) and naive factorization for K{sub h}=K{sub 2}{sup *}(1430). There are three distinct types of penguin contributions: (i) ...

ETA-II is a high current, high-repetition-rate induction linac designed for use in free-electron laser (FEL) research. ETA-II design is to produce 7.5-MeV, 2-kA, 70-ns pulses at a brightness of 2 /times/ 10/sup 9/A/(m-rad)/sup 2/ with a repetition rate of up to 100 Hz continuous or 5 kHz in burst mode. The pulse power is generated by pulse compression ...

The Mark III collaboration has performed a high statistics study of the reaction J/psi ..-->.. ..gamma..eta..pi../sup +/..pi../sup -/, with two different final states of the eta, eta ..-->.. ..gamma gamma.. and eta ..-->.. ..pi../sup 0/..pi../sup +/..pi../sup -/. Both modes have a ...

At the Accelerator Test Facility (ATF) at KEK intrabeam scattering (IBS) is a strong effect for an electron machine. It is an effect that couples all dimensions of the beam, and in April 2000, over a short period of time, all dimensions were measured as functions of current. In this report we derive a simple relation for the growth rates of emittances due to IBS. We apply the ...

The authors describe an emission model for gamma ray pulsars based on curvature radiation-reaction limited charges in the outer magnetosphere. They show how pair production on thermal surface flux can limit the acceleration zones. Estimates for the efficiency of GeV photon production eta gamma and the gamma-ray beaming fraction are derived, including their ...

Nb{sub 3}Sn is currently the material most commonly foreseen for the development of high field superconducting magnets. This is done by either the wind and react technique, usually used for compact magnets like accelerator magnets, or the react and wind technique, more common on large scale magnets. In both cases, a thorough understanding of the Cu-Sn system diffusion and ...

The ETA-2 electron beam will be used to drive a high power microwave frequency FEL for plasma heating experiments. For maximum FEL output power the beam energy at the entrance to the wiggler should be within {plus minus}1% of the wiggler resonance value. In initial operations the ETA-2 beam energy stayed within this range for a maximum time of less than 13 ...

We present a model for nonlinear hydrodynamic instabilities of interfaces and the formation of bubbles driven by time-dependent accelerations g(t) . To obtain analytic solutions, we map the equation for the bubble amplitude eta(t) onto the Schr�dinger equation and solve it as an initial value (eta_{0},eta[over ...

We present a model for nonlinear hydrodynamic instabilities of interfaces and the formation of bubbles driven by time-dependent accelerations g(t). To obtain analytic solutions, we map the equation for the bubble amplitude {eta}(t) onto the Schroedinger equation and solve it as an initial value ({eta}{sub ...

We present measurements of branching fractions and charge asymmetries for six B-meson decay modes with an eta or eta(') meson in the final state. The data sample corresponds to 232 x 10(6) BB pairs collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) B Factory at SLAC. We measure the branching fractions (in units ...

We present measurements of branching fractions and charge asymmetries for six B-meson decay modes with an {eta} or {eta}{sup '} meson in the final state. The data sample corresponds to 232x10{sup 6} BB pairs collected with the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} B Factory at SLAC. We measure the ...

An approach to the eta..-->..3..pi.. decays based on eta-..pi../sup 0/ mixing and resonant final-state interactions is presented. It successfully accounts for the experimental data and circumvents the difficulties of the traditional (current-algebra) approach. The value for the G-parity-violating coupling constant Vertical Barg/sub ...

Microwave measurements of the ETA accelerating cavities have shown eleven resonances in the frequency range of 0 to 850 MHz. These modes have been identified according to their similarity with the modes of a cylindrical cavity. Measurements of the Q's of the modes yielded values from 14 to 70 and transverse shunt impedances (R/sub perpendicular/Q) ...

Scope and method of study. This work investigates the optically stimulated luminescence (OSL) response of carbon-doped aluminum oxide Al2O3:C detectors exposed to heavy charged particles (HCPs) with energies relevant to radiation protection in space, and cancer therapy. This investigation includes ground-based experiments in accelerators and theoretical studies of the ...

We explore the effects of shear viscosity on the hydrodynamic evolution and final hadron spectra of Cu + Cu collisions at ultrarelativistic collision energies, using the newly developed (2 + 1)-dimensional viscous hydrodynamic code VISH2+1. Based on the causal Israel-Stewart formalism, this code describes the transverse evolution of longitudinally boost-invariant systems ...

Note that the main goal of this thesis work is the measurement of the branching fractions, charge asymmetry, and Time-Dependent CP Violation in {eta}'K{sup 0} mode. All other measurements are reported here for completion because they are connected by similar physics arguments. They are part of the Milan analysis activity, done by undergraduate students. They should ...

Measurements of high p{sub T} mid-rapidity {eta} production in polarized and unpolarized proton-proton collisions provide information about a number of quantities that are currently not well constrained by other measurements. Specifically, the double helicity asymmetry in high p{sub T} mid-rapidity {eta} meson production is sensitive to the gluon helicity ...

The international accelerator school on Frontiers of Accelerator TechnoIogy was organized jointly by the US Particle Accelerator School (Dr. Mel Month and Ms. Marilyn Paul), the CERN Accelerator School, and the KEK Accelerator School, and was hosted by th...

We have modified the single pulse target experimental facility[1] on the Experimental Test Accelerator II (ETAII) to perform the double pulse target experiments to validate the DARHT-II[2, 3] multi-pulse target concept. The 1.15 MeV, 2 kA Snowtron injector will provide the first electron pulse. The 6 MeV, 2 kA ETA-II beam will be used as the probe beam. ...

LLNL has proposed a multi-pulsed, multi-line of sight radiographic machine based on induction linac technology to be the core of the advanced hydrotest facility (AHF) being considered by the Department of Energy. In order to test the new technologies being developed for AHF we have recommissioned the Experimental Test Accelerator (ETA II). We will conduct ...

Experimental measurements of CP symmetry violating parameters can make important contributions to our understanding of the electroweak interaction. At present the only well -known values of CP symmetry violating parameters are determined from K to 2pi decays. The theoretical parameter of interest is epsilon' which measures CP symmetry violation in the decay matrix element of the neutral kaon. Most ...

We extend our earlier model for Rayleigh-Taylor and Richtmyer-Meshkov instabilities to the more general class of hydrodynamic instabilities driven by a time-dependent acceleration g(t) . Explicit analytic solutions for linear as well as nonlinear amplitudes are obtained for several g(t)'s by solving a Schroedinger-like equation d{sup ...

... Descriptors : *ELECTRON ACCELERATORS, *LINEAR ACCELERATORS, ELECTROMAGNETIC FIELDS, SCATTERING, ENERGY ...

... Accession Number : AD0611428. Title : ACCELERATION SENSITIVITIES OF HYDROPHONES. Descriptive Note : Final rept.,. ...

Apr 24, 2007 ... The fantasy-like landscape of the nebula is sculpted by the action of ... Eta Carinae is in the final stages of its brief and eruptive ...

in the production of interferons (Talas etal., 1983 and 1984; Gould eta/.,. 1987a), and alterations in lymphocyte activation ...

and eta -- are much fainter and more narrow than the epsilon ring. Then come the beta and alpha rings and finally the innermost grouping, known simply as the 4, 5 and 6 rings. The...

Measurement of beam radius as a function of focusing strength of an upstream solenoidal field allows simultaneous determination of the beam energy, brightness and tilt of the phase space ellipse. On ETA-II beam radius has been measured by analyzing foil e...

Using 383 x 10(6) BBover pairs from the BABAR data sample, we report results for branching fractions of six charged B-meson decay modes, where a charged kaon recoils against a charmless resonance decaying to KKover* or etapipi final states with mass in the range (1.2-1.8) GeV/c2. We observe a significant enhancement at the low KKover* invariant mass which is interpreted as ...

Decays of the {psi}(2S) into vector plus pseudoscalar meson final states have been studied with 14x10{sup 6} {psi}(2S) events collected with the BESII detector. Branching fractions of {psi}(2S){yields}{phi}{eta}, {phi}{eta}{sup '}, and {omega}{eta}{sup '}, and upper limits of ...

Using 58 million J/{psi} events accumulated with the BES II detector, branching fractions for the {eta}{sub c}{yields}VV decays, {eta}{sub c}{yields}{rho}{rho}, {eta}{sub c}{yields}K*K*, {eta}{sub c}{yields}{omega}{omega}, and {eta}{sub c}{yields}{phi}{phi}, are measured. The branching ...

The asymptotic scheme of post-Newtonian approximation defined for general relativity in the harmonic gauge by Futamase and Schutz (1983) is based on a family of initial data for the matter fields of a perfect fluid and for the initial metric, defining a family of weakly self-gravitating systems. We show that Weinberg's (1972) expansion of the metric and his general expansion of the ...

The authors report results for measurements of the decay branching fractions of B{sup 0} to the charmless final states {eta}{omega} and {eta}K{sup 0}, and of B{sup +} to {eta}{rho}{sup +} and {eta}'{pi}{sup +}. None of these decays have been observed definitively. Measurements of the ...

ATA is a pulsed, 50 ns 10 KA, 50 MeV linear induction electron accelerator at LLNL. The ETA could be used as an injector for ATA. However the possibility of building a new injector gun for ATA, raised the question as to what changes from the ETA gun in electrode dimensions or potentials, if any, should be considered. In this report the ...

A high-gain FEL experiment using the 10 kA, 4.5 MeV Experimental Test Accelerator (ETA) is described.

A description of the FEL experiment underway at the 10 kA, 5 MeV Experimental Test Accelerator (ETA) is described. The facility has been designed to investigate the high-gain operation of an FEL.

Both the Experimental Test Accelerator (ETA) and the Advanced Test Accelerator (ATA) are 10 kA electron induction linacs. The ETA produces a 4.5 MeV, 30 ns pulse, and the ATA a 50 MeV, 70 ns pulse. The ETA has been operational since 1979, having produced over 6 million pulses. Both the beam ...

Earlier Microwave Measurements of the ETA Accelerating Cells has uncovered eleven resonances in the frequency range of 0 > 850 MHz. The Q values of these modes ranged from 14 to 70. A three phase program directed at substantially reducing these Q values is reported. In particular the dampening methods described below resulted in a decrease of Q value ...

During the past year, several magnetic pulse compression systems have been built and applied to the ETA accelerator. In view of their excellent performance, a non-linear magnetic system has been adopted for the ATA grid drive in place of the spark gap driven Blumlein. The magnetic system will give us a much higher reliability and greater flexibility by ...

Partial widths have been measured for the decays of the eta' meson into 2..gamma.., ..omega gamma.., 3..pi../sup 0/, and eta..pi../sup 0/..pi../sup 0/. Upper-limit estimates have been obtained for the decays of the eta' meson into 3..gamma.., ..pi../sup 0/..gamma gamma.., 2..pi../sup 0/, and 4..pi../sup 0/ . The slope ...

Total cross sections for the quasifree pn{yields}pn{eta} reaction in the range from the kinematical threshold up to 20 MeV excess energy have been determined. At threshold they exceed corresponding cross sections for the pp{yields}pp{eta} reaction by a factor of about 3 in contrast to the factor of 6 established for higher excess energies. To large extent, ...

The authors present measurements of the B {yields} {eta}K{gamma} branching fractions and upper limits for the B {yields} {eta}'K{gamma} branching fractions. For B{sup +} {yields} {eta}K{sup +}{gamma} they also measure the time-integrated charge asymmetry. The data sample, collected with the BABAR detector at the Stanford ...

The implications of hadron spectroscopy are generally overlooked both by experimenters presenting results and theorists making predictions. Two examples are (1) possible effects of nodes in wave functions of final state mesons produced in B decay; (2) dependence of predictions for B decays into final states containing {eta} or ...

Using a sample of 530,000 tau leptons collected by the Crystal Ball experiment at the e/sup +/e/sup -/ storage ring DORIS II, we have searched for tau decays to the eta meson. No eta signal is found in the inclusive analysis, tau ..-->.. eta X, of 1-prong decays, leading to the upper limits, BR(tau/sup -/ ..-->.. nu ..pi../sup ...

It was argued long ago that {eta}{sub b} could be observed through the {eta}{sub b}{yields}J/{psi}({yields}{mu}{sup +}{mu}{sup -})J/{psi}({yields}{mu}{sup +}{mu}{sup -}) decay chain. Recent calculations indicate that the width of {eta}{sub b} into two J/{psi} is almost 3 orders of magnitude smaller than the one into the DD*. We study ...

The authors present results for measurement of the decays to charmless final states of B{sup 0} meson to {eta}K{sup 0}, {eta}{omega}, a{sub 1}{sup +}(1260){pi}{sup -} with a{sub 1}{sup +}(1260) {yields} {pi}{sup +}{pi}{sup +}{pi}{sup -}, and of B{sup +} to {eta}{rho}{sup +}, ...

The observation of all-neutral final states produced in two photon collisions is reported. Data was taken with the Crystal Ball detector at the SPEAR e(e/sup -/ colliding beam facility, equipped with a low threshold two photon event trigger. A total of 2700 nb/sup -1/ of data was collected with beam energies ranging from 2.5 to 3.7 GeV. Events have been isolated which are ...

Using a sample of 2.59x10{sup 7} {psi}(2S) decays collected by the CLEO-c detector, we present results of a study of {chi}{sub c0} and {chi}{sub c2} decays into two-meson final states. We present the world's most precise measurements of the {chi}{sub cJ,(J=0,2)}{yields}{pi}{sup +}{pi}{sup -}, {pi}{sup 0}{pi}{sup 0}, K{sup +}K{sup -}, K{sub S}{sup 0}K{sub S}{sup 0}, ...

We extend our earlier model for Rayleigh-Taylor and Richtmyer-Meshkov instabilities to the more general class of hydrodynamic instabilities driven by a time-dependent acceleration g(t). Explicit analytic solutions for linear as well as nonlinear amplitudes are obtained for several g(t)s by solving a Schr�dinger-like equation d(2)eta/dt(2)-g(t)kAeta=0, ...

Context. The most massive binary system Eta Carinae has been recently established as a gamma-ray source by the AGILE and Fermi-LAT detectors. The high energy spectrum of this gamma-ray source is very intriguing. It shows two clear components and a lack of any evidence of variability with the orbital period of the binary system. Aims: We consider different scenarios for the ...

The decays of excited nonstrange baryons into the final states {Delta}{eta} and {Delta}{omega} are examined in a relativized quark pair creation model. The wavefunctions and parameters of the model are fixed by previous calculations of N{pi} and N{pi}{pi}, etc., decays through various quasi-two body channels including N{eta} and ...

You must enable scripting on your browser to be able to use all the functionality of the site Final Rules Interim Final Rules Proposed Rules Notices NAFTA Rules Hours of Service...

A large solid angle (98% of 4(pi) steradians) array of thallium-doped sodium iodide crystals, together with spark- and multiwire proportional chambers for charged particle tracking, is used to study the decays of the (psi)' meson. This apparatus (the "Crystal Ball detector") is situated in the East Interaction Region of the SPEAR electron -positron collision ring at the Stanford Linear ...

MENU{close_quote}97 covered many stunning successes of chiral symmetry in intermediate energy reactions, especially of processes that involve pions. These successes include coupling constants, scattering lengths, threshold meson production, electric and magnetic polarizabilities of pions and nucleons, peripheral {ital NN} scattering, {pi}, {eta} and {ital K} decay rates and ...

MENU'97 covered many stunning successes of chiral symmetry in intermediate energy reactions, especially of processes that involve pions. These successes include coupling constants, scattering lengths, threshold meson production, electric and magnetic polarizabilities of pions and nucleons, peripheral NN scattering, {pi}, {eta} and K decay rates and spectra. The {pi}N ...

The {eta}'(958) meson has been studied in the reaction K{sup -}p {yields} {Lambda}{eta}', with K{sup -} beam momenta ranging from 1.70 to 2.65 Gev/c. The Dalitz plots of {eta}' decay into {pi}{sup +}{pi}{sup -}{eta} and {pi}{sup +}{pi}{sup -}{gamma} have been examined, and from them we ...

We present measurements of branching fractions and charge asymmetries for seven B-meson decays with an eta, eta', or omega meson in the final state. The data sample corresponds to 89x10(6) BB pairs produced from e(+)e(-) annihilation at the Upsilon(4S) resonance. We measure the following branching fractions in units of 10(-6): ...

Techniques useful for generating and conditioning power for high energy pulsed accelerators with potential weapon applications are described. Pulsed electron accelerators are exemplified by ETA and ATA at Lawrence Livermore Laboratories and RADLAC at Sandia Laboratories Albuquerque. Pulse-power techniques used in other applications are ...

In linear proton accelerators with a high average current (approx.1 mA) the particle loss must be low (approx.0.1--0.01%). This loss is due to particles which lie beyond the stability boundary for longitudinal motion. The bunching system at the input to the linear accelerator is optimized in an attempt to reduce this loss. Preference should be assigned to ...

Using 383x10{sup 6} BB pairs from the BABAR data sample, we report results for branching fractions of six charged B-meson decay modes, where a charged kaon recoils against a charmless resonance decaying to KK* or {eta}{pi}{pi} final states with mass in the range (1.2-1.8) GeV/c{sup 2}. We observe a significant enhancement at the low KK* invariant mass ...

Using 383 million B{bar B} pairs from the BABAR data sample, they report results for branching fractions of six charged B-meson decay modes, where a charged kaon recoils against a charmless resonance decaying to K{bar K}* or {eta}{pi}{pi} final states with mass in the range (1.2-1.8) GeV/c{sup 2}. They observe a significant enhancement at the low K{bar K}* ...

Relativistic effects in a three-body calculation of the np{yields}{eta}d process are considered. Parametrizations for the {eta}N interaction obtained from phenomenological meson-nucleon models are probed. Relativistic effects on the range and strength of the pion exchange contribution to the reaction mechanism are seen to be large, while boost effects of ...

Cross sections and form factors for e{sup +}e{sup -}{yields}{omega}{pi}{sup 0}, {rho}{eta}, and {rho}{eta}{sup '} at center of mass energies of 3.650, 3.686, and 3.773 GeV are measured using data samples collected with the BESII detector at the BEPC. Also, the branching fractions of {psi}(2S){yields}{omega}{pi}{sup 0}, ...

Acceleration of the global water cycle over recent decades, which is hypothesized by several studies, remains uncertain because of the high inter-annual variability of its components. Observations of pan evaporation (Epan), a proxy of potential evapotranspiration (ETp), may help to identify trends in the water cycle over long time periods. The complementary relation (CR; ...

We have analyzed the reaction ..pi../sup -/p ..-->.. ..pi../sup 0/etan(eta ..-->.. 2..gamma..) on the basis of the data from an experiment carried out in the 70-GeV accelerator at Serpukhov with use of the NICE 648-channel hodoscopic spectrometer for detection of the ..gamma.. rays. We used a method which permits determination of the number of ...

I give a summary of the technique and results from Fermilab Experiment E760 which studied the Charmonium spectrum by resonant formation in Proton-Antiproton Annihilation; final results on measurements of the (eta)(sub c), and the search for the (eta)(prim...

Soil Temperature and Moisture Errors in Operational Eta Model Analyses CHRISTOPHER M. GODFREY (Manuscript received 18 June 2007, in final form 30 September 2007) ABSTRACT Proper partitioning by continuously cycling soil temperature and moisture fields. These fields previously evolved only in response

The first part of this talk is an experimental review of the properties of the THETA meson. Results or upper limits come from radiative j/psi decays and ..gamma gamma.. scattering for the final states eta eta, ..pi pi.., K anti K and rho rho. In the second part, an upper limit is given for the production of low-mass particles in ...

The Crystal Ball detector has been used to analyse the formation of resonances in photon-photon collisions. The (pi)(sub 2) (1670) resonance has been observed in the 3(pi)(sup 0) final state, as well as the eta' (958) and X (1900) resonances in the eta(pi...

Exclusive charged B decays show an unexplained enhancement in low-lying channels which must be reversed in other channels to equalise charged and neutral lifetimes. One suggested explanation involves decay modes with excited mesons like the a{sub 1}. The anomalous behavior of decay modes of D and B mesons into final states containing the {eta} and ...

I give a summary of the technique and results from Fermilab Experiment E760 which studied the Charmonium spectrum by resonant formation in Proton-Antiproton Annihilation; final results on measurements of the {eta}{sub c}, and the search for the {eta}{prime}{sub c} are given. Prospects for the continued study in a new experiment, E835, ...

The Microwave Tokamak Experiment (MTX) is under construction at LLNL to investigate the feasibility of intense, pulsed microwave radiation for plasma heating on future ignition tokamaks. A high-average-power free-electron laser (FEL) will use the Experimental Test Accelerator (ETA-II), a linear induction accelerator, in combination ...

This paper reviews the formalism of maximum entropy beam diagnostic tomography as applied to the Fusion Materials Irradiation Test (FMIT) prototype accelerator. The same formalism has also been used with streak camera data to produce an ultrahigh speed movie of the beam profile of the Experimental Test Accelerator (ETA) at Livermore.

This paper reviews the formalism of maximum entropy beam diagnostic tomography as applied to the Fusion Materials Irradiation Test (FMIT) prototype accelerator. The same formalism has also been used with streak camera data to produce an ultrahigh speed movie of the beam profile of the Experimental Test Accelerator (ETA) at Livermore. ...

The measurements of outgassing rates and coefficients of ion stimulated desorption eta upon ion action, forming when ionization of the residual gas in the vacuum chamber, have been carried out in the accelerating-storage complex vacuum chamber model, made...

A linear discontinuous Galerkin treatment is developed for the continuous slowing down operator. Multigroup Legendre coefficients are derived that allow this treatment to be implemented in standard S/sub ETA/ codes. A synthetic acceleration scheme is developed to accelerate the outer iterations required by this treatment. A ...

In linear accelerators the maximum achievable beam current is often limited by the Beam Breakup (BBU) instability. This instability arises from the interaction of a transversely displaced beam with the dipole modes of the acceleration cavities. The modes of interest have non-zero transverse magnetic fields at the center of the cavity. This oscillating ...

... Accession Number : ADA205090. Title : Visual Processing of Object Velocity and Acceleration. Descriptive Note : Final technical rept. ...

... Accession Number : ADA100936. Title : The Space-Charge Resonance Accelerator. Descriptive Note : Final rept.,. Corporate ...

... Accession Number : ADA214919. Title : Plasma Accelerator and Energy Conversion Research. Descriptive Note : Final rept. ...

... Title : OPERATION OF ACCELERATOR-STORAGE RING TO PROVIDE ULTRAVIOLET RADIATION. Descriptive Note : Final rept.,. ...

... Accession Number : ADA229102. Title : IFR Transport in Recirculating Accelerators. Descriptive Note : Final rept. Corporate ...

... Accession Number : ADA011999. Title : High Acceleration Cockpit Mockup Evaluation. Descriptive Note : Final rept.,. Corporate ...

... Title : FLOOR ACCELERATIONS AND PASSENGER INJURIES IN TRANSPORT AIRCRAFT ACCIDENTS. Descriptive Note : Final technical rept. ...

... Title : Analytical Investigations of the Acceleration Sensitivity of Acoustic Bulk and Surface Wave Resonators. Descriptive Note : Final rept. ...

... Accession Number : ADA202185. Title : An Exploratory Study of Ram Accelerator Principles. Descriptive Note : Final technical rept. ...

... Title : Accelerating Utilization of New Materials. Descriptive Note : Final rept. ... The advantages to be derived from new materials are documented. ...

The MTX experiment was proposed in 1986 to apply high frequency microwaves generated by a free-electron laser (FEL) to electron cyclotron resonance heating (ECRH) in a high field, high density tokamak. As the absorption of microwaves at the electron cyclotron resonance requires high frequencies, the opportunity of applying a free-electron laser has appeal as the device is not limited to ...

We have measured precise total and differential cross sections for the reaction {gamma}{ital p}{r_arrow}{ital p}{eta} from threshold to 790 MeV at the MAMI accelerator in Mainz with the neutral meson spectrometer TAPS. Resonance parameters of the {ital S}{sub 11}(1535) resonance and the electromagnetic coupling {gamma}{ital p}{r_arrow}{ital S}{sub 11} have ...

We have performed a search for the {eta}{sub b}(1S) meson in the radiative decay of the {Upsilon}(2S) resonance using a sample of 91.6 million {Upsilon}(2S) events recorded with the BABAR detector at the PEP-II B factory at the SLAC National Accelerator Laboratory. We observe a peak in the photon energy spectrum at E{sub {gamma}} = 610.5{sub -4.3}{sup ...

The authors present preliminary measurements of time-dependent CP-violation parameters in the decay B{sup 0} {yields} {omega}K{sub S}{sup 0}, B{sup 0} {yields} {eta}{prime}K{sup 0}, B{sup 0} {yields} {pi}{sup 0}K{sub S}{sup 0}, B{sup 0} {yields} {phi}K{sub S}{sup 0}{pi}{sup 0}, and B{sup 0} {yields} K{sup +}K{sup -}K{sub S}{sup 0}, which includes the resonant ...

The Crystal Barrel detector provides a powerful tool for studying exotic mesons like glueballs, hybrids and multi-quark states produced in {bar p}p annihilation. High statistics in pure neutral as well as mixed charged and neutral final states have been accumulated. The main results were obtained in the Dalitz-plot analysis of three pseudoscalar final ...

In a sample of 6.6{times}10{sup 6} produced B mesons we have observed decays B{r_arrow}{eta}{sup {prime}}K , with branching fractions B(B{sup +}{r_arrow}{eta}{sup {prime}} K{sup +})=(6.5{sup +1.5}{sub {minus}1.4} {plus_minus}0.9){times}10{sup {minus}5} and B(B{sup 0}{r_arrow}{eta}{sup {prime}} K{sup 0})=(4.7{sup +2.7}{sub {minus}2.0} ...

It is proposed to use the Charged and Neutral Spectrometer in Beam 8 to study the reactions ..pi../sup -/p ..-->.. ..pi../sup +/..pi../sup -/3..gamma..n and ..pi../sup -/p ..-->.. ..pi../sup +/..pi../sup -/4..gamma..n at 8.5 GeV/c. Improvements to the spectrometer will allow a data collection rate 4 to 5 times better than achieved for these reactions in E-397. Of particular interest are the ...

We report preliminary measurements of the exclusive charmless semileptonic branching fractions of the B{sup +} {yields} {eta}{ell}{sup +}{nu} and B{sup +} {yields} {eta}'{ell}{sup +}{nu} decays. These measurements are based on 316 fb{sup -1} of data collected at the {Upsilon}(4S) resonance by the BABAR detector. In events in which the decay of one ...

Inclusive transverse momentum spectra of eta mesons in the range p(T)approximate to 2-12 GeV/c have been measured at midrapidity (vertical bar eta vertical bar gamma gamma channel for the three colliding systems as well as through the eta ->pi(0)pi(+)pi(-) decay mode in p+p and d+Au collisions. The nuclear modification factor in ...

Using {psi}(2S){yields}{pi}{sup +}{pi}{sup -}J/{psi}, J/{psi}{yields}{gamma}{eta}{sup '} events acquired with the CLEO-c detector at the CESR e{sup +}e{sup -} collider, we make the first observations of the decays {eta}{sup '}{yields}{pi}{sup +}{pi}{sup -}{pi}{sup 0} and {eta}{sup '}{yields}{pi}{sup ...

The ETA is a high current (10,000 Amp) linear induction accelerator that produces short (30 ns) pulses of electrons at 5 MeV twice per second or in bursts of 5 pulses separated by as little as one millisecond. At this time the machine has operated at 65% of its design current and 90% of the design voltage. This report contains a description of the ...

A pulsed electron accelerator has been constructed and is now in operation at the Lawrence Livermore Laboratory. This Experimental Test Accelerator (ETA) a 5 MeV, 10 kA, 50 ns FWHM, five pulse burst at 1 kHz, was designed to be the front end or injector for the Advanced Test Accelerator (ATA). The ATA is presently ...

The supermassive star model for the origin of the nonthermal luminosity L/subn//subt/ of QSOs and galactic nuclei is discussed. The basic model analyzed is the combined model of moving magnetic fields for the accelerating mechanism of ultrarelativistic particles and gravitational collapse for the energy source. For this combined model L/subn//subt/approx. ...

The molecular structure of the title compound is reported. [Part of final report for DOE contract FG02-98ER45709.

The subject of production of resonances via two photons in e exp + e- colliding beams has finally come into its own. In particular, the eta meson is already changing from this year's sensation to next year's normalization. As for the other old physics mes...

The Crystal Barrel detector at LEAR was used to study {ital p{bar p}} annihilation at rest into the final state {omega}{eta}{pi}{sup 0}, where the final-state mesons were observed in all-neutral decay modes. A sample of 10.9{times}10{sup 4} {omega}{eta}{pi}{sup 0} events was obtained from the analysis of 10{sup 6} ...

We have constructed a 140-GHz free-electron laser to generate high-average-power microwaves for heating the MTX tokamak plasma. A 5.5-m steady-state wiggler (intense Microwave Prototype-IMP) has been installed at the end of the upgraded 60-cell ETA-II accelerator, and is configured as an FEL amplifier for the output of a 140-GHz long-pulse gyrotron. ...

A brief history of induction accelerator development was covered in Chap. 2. The induction accelerators constructed since the early 1960s can be categorized as short-pulse if the pulse duration is less than 100 ns and long-pulse if it is longer. The distinction between short-pulse and long-pulse is arbitrary; it mainly reflects the type of magnetic ...

Inclusive transverse momentum spectra of {eta} mesons in the range p{sub T}{approx}2-12 GeV/c have been measured at midrapidity (|{eta}|<0.35) by the PHENIX experiment at RHIC in p+p,d+Au, and Au+Au collisions at {radical}R{sub NN}=200 GeV. The eta mesons are reconstructed through their {eta}{yields}{gamma} ...

We have observed new channels for {tau} decays with an {eta} in the final state. We study 3-prong tau decays, using the {eta}{r_arrow}{gamma}{gamma} and {eta}{r_arrow}3{pi}{sup 0} decay modes and 1-prong decays with two {pi}{sup 0} {close_quote}s using the {eta}{r_arrow}{gamma}{gamma} channel. ...

Thermolysis of Cp*W(NO)(CH2CMe3)(eta(3)-CH2CHCHMe) (1) at ambient temperatures leads to the loss of neopentane and the formation of the eta(2)-diene intermediate, Cp*W(NO)(eta(2)-CH2=CHCH=CH2) (A), which has been isolated as its 18e PMe3 adduct. In the presence of linear alkanes, A effects C-H activations of the hydrocarbons ...

Photoemission from several metals was studied with 10 ps laser pulses at 266 nm. The yield was linear with energy and with area. Quantum efficiencies (/eta/) were determined (up to 10/sup /minus/3/ e/photons for samarium), and found to vary as (h..nu..-/phi/)/sup 2/. /eta/ also increased with the field. The field assisted efficiencies were calculated for ...

Magnetic switching offers an alternative to overcoming the rep-rate and life limitations of the spark gaps in the ETA/ATA induction accelerators. The principle has been applied for many years to radar modulators but at much lower power levels and longer pulse lengths. Comparatively recent developments in magnetic materials together with some optimal ...

Pulses of 140 GHz microwaves have been produced at a 2 kHz rate using the ETA-III induction linac and IMP wiggler. The accelerator was run in bursts of up to 50 pulses at 6 MeV and greater than 2 kA peak current. A feedback timing control system was used to synchronize acceleration voltage pulses with the electron beam, resulting in ...

Simultaneous measurements of ({rho}{eta}) and of the molar volume are reported for liquid mixtures of {sup 3}He in {sup 4}He over the temperature range between 0.5 and 2.5 K. Here {eta} is the shear viscosity and {rho} is the mass density. In the superfluid phase, the product of the normal components, {rho}{sub n} and {eta}{sub n}, is ...

We present the results of searches for B decays to charmless two-body final states containing eta(') or omega mesons, based on 20.7 fb(-1) of data collected with the BABAR detector. We find the branching fractions Beta(B(+)-->eta(')K(+)) = (70+/-8+/-5) x 10(-6), Beta(B(0)-->eta(')K(0)) = (42(+13)(-11) +/- 4) ...

We report a measurement of the rate for B {yields} {eta}{prime} X{sub s} transitions where the {eta}{prime} meson has center-of-mass momentum in the range 2.0 to 2.7 GeV/c and X{sub s} represents a system comprising a kaon and up to four pions. Our study is based on 22.2 million B{bar B} pairs collected at the {Upsilon}(4S) with the BABAR detector at the ...

For 3987 accelerator-produced jets of 30--400-GeV protons in nuclear emulsion, 's are individually calculated for each jet, where eta(theta) is a kinematic parameter introduced by us in 1967 in order to approximate the rapidity eta = arctanh(..beta.. costheta). Then by taking further averages by dividing the samples into ...

This study investigated the relationship between physiological and anthropometric qualities and tackling ability in rugby league players. Twelve rugby league players (mean +/- SD age, 24.4 +/- 3.5 years) underwent a standardized 1-on-1 tackling drill in a 10-m grid. Video footage was taken from the rear, side, and front of the defending player. Tackling proficiency was assessed using standardized ...

The Experimental Test Accelerator II (ETA-II) linear induction accelerator at Lawrence Livermore National Laboratory uses a solenoid magnet in each acceleration cell to focus and transport an electron beam over the length of the accelerator. To control growth of the corkscrew mode the magnetic ...

The availability of data on B{sub s} decays to strange quasi-two-body final states, either with or without charmonium opens new possibilities for understanding different contributions of weak diagrams and in particular the relative contributions of tree and penguin diagrams. Corresponding B{sub d} and B{sub s} decays to charge conjugate final states are ...

Resonance production in two-photon interactions is studied using data collected with the ASP detector at the PEP e^{+}e^{- } storage ring located at the Stanford Linear Accelerator Center. The ASP detector is a non-magnetic lead-glass calorimeter constructed from 632 lead-glass bars. It covers 94% of 4pi in solid angle, extending to within 20^circ of the beamline. Lead ...

... Descriptors : *NUCLEAR PHYSICS, *PARTICLES, ACCELERATION, BEVATRONS, COSMIC RAYS, DEGRADATION, ENERGY, THEORY. ...