During start-up of the CERN AA, many hours of machine experiments went into the study and optimization of antiproton yields. Those involved in the commissioning programme experienced the difficulty of tuning a new machine to accept a low-intensity full-aperture beam. The antiproton yield could only be obtained by integrating a slow ...

... Descriptors : *HYDROGEN, *ANTIPROTONS, MEASUREMENT, IONIZATION, ACID PHOSPHATASE, TARTRATES, PLASMAS(PHYSICS). ...

This report summarizes a set of calculations for the antiproton production in a complex composed of target area, collector, separator, beam line and collector ring for the antiproton source of the future FAIR facility (Facility for Antiproton and Ion Research) at GSI, Darmstadt, Germany. The emphasis is on the ...

The present visit to CERN was as a result of an invitation from Dr. Colin Johnson of the Antiproton Accumulator (AA) group. Two activities were planned for this visit. First, the second beam test of one of the original Fermilab lithium lenses (serial No.2). Second, the installation and beam tests for a new Fermilab lens of improved design (serial No.5). It ...

Progresses in accumulating a large number of low energy antiprotons with Antiproton Decelerator (AD), Radio Frequency Quadrupole Decelerator (RFQD), and a multiring trap in Atomic Spectroscopy And Collisions Using Slow Antiprotons (ASACUSA) enables the confinement of more than 106 antiprotons. Confinement of a ...

... FOR ANTIPROTONS AND STUDY OF PARTICLE PRODUCTION IN 3 ... Corporate Author : PRINCETON UNIV NJ ELEMENTARY PARTICLES LAB. ...

Antiproton moderation in a substance at energies between one and two pi /sup 0/ production was studied. It is shown that antiprotons are absorbed primarily by nuclei, and the number of antiprotons during the moderation process remains almost unchanged. (tr-auth)

During start-up of the CERN AA, many hours of machine experiments went into the study and optimization of antiproton yields. Those involved in the commissioning programme experienced the difficulty of tuning a new machine to accept a low-intensity full-ap...

We present evidence showing how antiprotonic hydrogen, the quasistable antiproton (p)-proton bound system, has been synthesized following the interaction of antiprotons with the molecular ion H2+ in a nested Penning trap environment. From a careful analysis of the spatial distributions of antiproton annihilation ...

We present evidence showing how antiprotonic hydrogen, the quasistable antiproton (p)-proton bound system, has been synthesized following the interaction of antiprotons with the molecular ion H{sub 2}{sup +} in a nested Penning trap environment. From a careful analysis of the spatial distributions of antiproton ...

Needs to improve the Fermilab Pbar Source for the Tevatron Upgrade and discrepancies in predictions of the antiproton yields have forced us to develop the production model based on the modern data and to incorporate this model to the current version of MA...

Page 1. 1 Accelerated Approval (AA) for Oncology Drug Products: ... Page 17. 17 Trial Design � Initial AA � Trial design for initial accelerated approval (AA) ...

A transportable antiproton storage device to store and transport low energy antiprotons for use away from the production facility has been proposed previously. In this note the AGS complex is examined as a possible filling station for such a device. The production and collection rate of ...

During the last several years, our TRAP collaboration has pioneered techniques for slowing, trapping, cooling and indefinitely storing antiprotons to energies more than 1010 times lower than previously possible. The radio signal from a single trapped antiproton is now being used for precision measurements. Many cold antiprotons are ...

The possibility for obtaining antihydrogen beams at the antiproton storage rings in the head-on collisions of antiprotons with synchrotron radiation photons is considered. As a second method, it is proposed that an insertion in which the antiprotons are accompanied with positrons be added; their recombination results in antihydrogen ...

The production of polarized antiproton beams at Fermilab is briefly reviewed. Two types of high-energy anti p polarimeters are described - the Coulomb-nuclear polarimeter and the Primakoff-effect polarimeter. The production of 8.9 GeV/c polarized antiprot...

We present results on antiproton production obtained in the AGS experiments E858 and preliminary results of E878. The yields of antiprotons in Si + A collisions are shown to sale with number of first collisions. The rapidity distributions for all targets ...

The production of commercial quantities of antiprotons has been a reality for many years now. The deceleration and trapping of antiprotons is a relatively new activity, but has been sufficiently proven to be translated into a business enterprise. Now that NASA has a portable Penning trap for transporting ...

We have used a radio frequency quadrupole decelerator to decelerate antiprotons emerging from the CERN Antiproton Decelerator from MeV- to keV-scale energy, and collected five decelerated pulses in a multiring trap. Some 5 x 10(6) antiprotons were stacked in this way. Cooling of the trapped antiprotons by a ...

The layout of a beam transport system for antiprotons, operating up to a maximum momentum of about 4 Bev/c is described. Electrostatic separators were used for the separation of antiprotons from pions up to about 1 Bev/c. Separation at higher momenta was obtained by means of time-of-flight. Results are given concerning fluxes of pions and ...

The antiproton source at Fermilab requires storage of antiprotons during the production of antiprotons. A fundamental part of the storage process involves stochastic cooling, which requires that the frequency spectrum from the pickups has notches at the revolution frequency and harmonics of the revolution frequency ...

To improve production of usable antiprotons using the proton beam from the main ring and the lossless injection of cooled antiprotons into the main ring, modifications of the main ring lattice are recommended.

Dec 20, 2010 ... contribution of primordial antimatter (antiprotons) to the antiproton intensity, which is dominated by secondary production in interstellar ...

Because of the potential application to power production, it is important to investigate a wide range of possible means to achieve nuclear fusion, even those that may appear initially to be infeasible. In antiproton catalyzed fusion, the negative antiprot...

contribution of primordial antimatter (antiprotons) to the antiproton intensity, which is dominated by secondary production in interstellar space. ...

A transportable antiproton storage device to store and transport low energy antiprotons for use away from the production facility has been proposed previously. In this note the AGS complex is examined as a possible filling station for such a device. The p...

Antiproton production in heavy ion collisions reflects subtle interplay between initial production and absorption by nucleons. Because the AGS energies (10--20 A(center-dot)GeV/c) are close to the antiproton production threshold, antiproton may be sensiti...

For producing polarized antiproton beams the so called spin filter method is normally discussed. The method has been proven by the FILTEX collaboration with a proton beam and detailed studies are presently performed by the PAX collaboration at COSY. A well known source for polarized antiprotons is the antilambda decay. It was used in the only experiment ...

Double pion production is studied in 1098 events of the reaction antiproton yields antiproton proton positive pion negative pion at an effective cross section 2.35 plus or minus 0.25 mb. Besides a strong production of hyperon resonance (++) isobar pair an...

When ideas for the SPS proton�antiproton collider firmed up, it was realized that the abundant production of antiprotons offered a further unique possibility: the deceleration and cooling would provide low-energy antiproton beams of unprecedented intensity and purity. A proposal was made to add a small facility ...

The Los Alamos National Laboratory currently has a research program in antimatter interactions. The immediate objective of the program is to develop the low energy antiproton production capabilities at LEAR and the technology to store antiprotons. The initial experimental goal is to measure the gravitational mass of ...

The Fermilab Recycler is a fixed 8 GeV kinetic energy storage ring located in the Fermilab Main Injector tunnel near the ceiling. The Recycler has two roles in Run II. First, to store antiprotons from the Fermilab Antiproton Accumulator so that the antiproton production rate is no longer compromised by large ...

Antiproton production in heavy ion collisions reflects subtle interplay between initial production and absorption by nucleons. Because the AGS energies (10--20 A{center_dot}GeV/c) are close to the antiproton production threshold, antiproton may be sensitive to cooperative ...

Following the pioneering work on lithium lenses at INP, Novosibirsk, a 2 cm diameter lens was designed and built at Fermilab as an antiproton collector for the antiproton source of the Tevatron I project. A lens of this type was tested at the CERN Antiproton Accumulator (AA) as an antiproton ...

The production of polarized antiproton beams at Fermilab is briefly reviewed. Two types of high-energy anti p polarimeters are described - the Coulomb-nuclear polarimeter and the Primakoff-effect polarimeter. The production of 8.9 GeV/c polarized antiprotons before entering the Fermilab accumulator ring is then ...

For making polarized antiproton beams the so called filter method is normally discussed. It is based on the depletion of one spin component due to the spin dependent interaction if a stored beam passes a polarized target. The method has been proven by the FILTEX collaboration and detailed studies are presently performed by the PAX collaboration. Another source for polarized ...

Over the last five years, a series of experiments by our TRAP Collaboration has made it possible to slow, cool and store antiprotons at energies 1010 lower than was previously possible. Despite the extremely low energy, the storage time exceeds 3.4 months. The first example of measurements which become possible with extremely cold antiprotons is a ...

Antiproton production rates which take into account multiple collision are calculated using a simple model. Methods to reduce capture of the produced antiprotons by the target are discussed, including geometry of target and the use of a high intensity laser. Antiproton production increases ...

Precision measurements of hyperon-antihyperon production with antiprotons permit detailed tests of strange quark pair production and decay. Recent measurements at LEAR of lambda-antilambda production are compared with selected calculations. A recent searc...

Radial compression of a proton cloud was performed in a multiring trap which was designed to trap and cool a large number of antiprotons for the production of low-energy ( 10-1000 eV ) antiproton beams. The resonance frequency for the radial compression was almost constant from 3 x 10(5) to 3 x 10(6) protons. The collision process of ...

Propulsion systems based on the annihilation of antiprotons in a propellant will be feasible a few decades from now; the development process will be paced by the overcoming of difficulties associated with the efficient production and storage of antihydrogen, prompting the present call for further study of antiprotons. ...

Selected Contents of this book are: JETSET: Physics at LEAR with an Internal Gas Jet Target; Heavy-Flavor Production at the CERN Proton-Antiproton Collider; Recent Results on JET Physics and QCD Tests by UA1 and UA2 at the CERN Proton-Antiproton Collider; A Report on the First FERMILAB Workshop on Antimatter Physics at Low Energy; ...

Production and trapping of antiprotons for space propulsion applications are reviewed. Present and foreseeable production rates at Fermilab are discussed, and experiments on trapping, confinement and transport of large quantities of antiprotons, as well as synthesis of atomic antihydrogen, are outlined. {copyright} ...

The same beam cooling techniques that have allowed for high luminosity antiproton experiments at high energy also provide the opportunity for experiments at ultra-low energy. Through a series of deceleration stages, antiprotons collected and cooled at the peak momentum for production can be made available at thermal or sub-thermal ...

The same beam cooling techniques that have allowed for high luminosity antiproton experiments at high energy also provide the opportunity for experiments at ultra-low energy. Through a series of deceleration stages, antiprotons collected and cooled at the peak momentum for production can by made available at thermal or sub-thermal ...

The same beam cooling techniques that has allowed for high luminosity antiproton experiments at high energy also provides the opportunity for experiments at ultra-low energy. Through a series of deceleration stages, antiprotons collected and cooled at the peak momentum for production can be made available at thermal or sub-thermal ...

The process of proton-antiproton pair prcduction by high-energy gamma quanta in which one particle of the pair is absorbed by the nucleus itself, forming a star, while the other particle carries away the total energy of the star is studied. The process takes place in the ultrarelativistic region where only the small angles between the gamma quanta pulses and ...

A lithium lens will be used to focus the 120 GeV proton beam on the antiproton production target to a spot size of about 0.1 mm, as part of the planned upgrade to the FNAL antiproton source target station. Improved focusing increases antiproton yield and corrects for possible future emittance dilution of the ...

Antiproton production in nucleus-nucleus collisions at energies below the threshold for its production from the nucleon-nucleon interaction in free space is studied in the relativistic Vlasov-Uehling-Uhlenbeck model. The antiproton self-energies in the medium are obtained in the mean-field approximation from the ...

Antiproton production in nucleus-nucleus collisions at energies below the threshold for its production from the nucleon-nucleon interaction in free space is studied in the relativistic Vlasov-Uehling-Uhlenbeck model. The antiproton self-energies in the medium are obtained in the mean-field approximation from the ...

Antiproton production in nucleus-nucleus collisions at energies below the threshold for its production from the nucleon-nucleon interaction in free space is studied in the relativistic Vlasov-Uehling-Uhlenbeck model. The antiproton self-energies in the medium are obtained in the mean-field approximation from the ...

Production and trapping of antiprotons for space propulsion applications are reviewed. Present and foreseeable production rates at Fermilab are discussed, and experiments on trapping, confinement and transport of large quantities of antiprotons are outlined. {copyright} {ital 1996 American Institute of Physics.}

In 2006, we continued to report substantial progress on 'The Production and Study of Antiprotons and Cold Antihydrogen' project funded by AFOSR. Listed below are the publications funded by AFOSR support since March 1, 2004. The topics identify the new dis...

Inclusive pion, kaon, proton, and antiproton production from proton-proton collisions is studied at a variety of proton energies. Various available parameterizations of Lorentz-invariant differential cross sections as a function of transverse momentum and...

In the Main Injector era beam intensities high enough to damage the antiproton production target will be available. In order to continue to operate with a tightly-focused primary beam spot on the target, and thus maintain yield, it will be necessary to sp...

A brief account is given of the events leading up to antiprotons in the Intersecting Storage Rings (ISR) followed by a synopsis of the characteristics and parameters of the physics runs made to date. Experience gained with critical operations, such as transfer line steering, injection optimization, stacking and phase displacement acceleration is reviewed bearing in mind the ...

The excess of antiprotons (P) observed in cosmic ray was attributed to their production in supernova

This article discusses the identification and production of the first antiatoms by an international team at CERN, using the low-energy Antiproton Ring (LEAR).

The design and capabilities of proton-antiproton colliders are reviewed with emphasis on the CERN SPS synchrotron. Fermilab and Tevatron are also considered. The problem of phase space cooling is considered in detail and the outlook for attainment of higher luminosities is discussed. Proton-antiproton colliders offer possibilities for very interesting ...

Cold antihydrogen is produced when antiprotons are repeatedly driven into collisions with cold positrons within a nested Penning trap. Efficient antihydrogen production takes place during many cycles of positron cooling of antiprotons. A first measurement of a distribution of antihydrogen states is made using a preionizing electric ...

Pion production data from pp and pn annihilation between 1.51 and 2.90 GeV/c were studied. The gross features of the data indicate that mechanisms for antiproton-nucleon annihilations are primarily of statistical nature. (auth)

The advent of the new beam cooling techniques and their application to antiproton production has already made possible major advances in high energy physics. These same techniques offer uniquely exciting possibilities for ultralow energy physics. Through ...

To produce large amounts of antiprotons, on the order of several grams/year, use of machines to produce nuclear collisions are studied. These can be of either proton-proton, proton-nucleus and nucleus-nucleus in nature. To achieve high luminosity collidin...

The antiproton production cycle is enumerated, and the commissioning of the antiproton source is described, giving milestones and major obstacles. The Tevatron collider operation is described, including procedure to load the Tevatron with three bunches of...

The Fermilab Recycler began regularly delivering antiprotons for Tevatron luminosity operations in 2005. Methods for tuning the Recycler stochastic cooling system are presented. The unique conditions and resulting procedures for minimizing the longitudinal phase space density of the Recycler antiproton beam are outlined.

Major headings in this review include: proton sources; antiproton production; antiproton sources and Liouville, the role of the Debuncher; transverse stochastic cooling, time domain; the accumulator; frequency domain; pickups and kickers; Fokker-Planck equation; calculation of constants in the Fokker-Planck equation; and beam feedback. ...

The application, expected performance, and status of electron cooling at LEAR are discussed, and the formation of a fast antihydrogen beam is considered as one experiment with high-quality low-energy antiproton beams. In estimating the formation rates, we...

for spacecraft propulsion, a modified rocket equation with relativistic corrections and variable mass-antiproton annihilation is in many cases the pre- ferred process for space propulsion applications, as the products including, among others, space propulsion. However, at best these populations occur in concentrations

The flux of cosmic ray antiprotons with kinetic energies between /approximately/1 and 15 GeV is /approximately/5 times greater than the flux predicted on the basis of the leaky-box model. This excess is attributed to secondary antineutron production in co...

The problems arising from targeting high intensity small-sigma proton pulses for antiproton production can be reduced by the beam sweeping on the target. The presented results of analytical estimations and of the full-scale Monte Carlo studies indicate a ...

The recent measurements of the antiproton yield as well as the previous ones differ from the predictions which are the basis of the TEVATRON1 Design Report. It was found in reference that at small acceptances, where the data depends essentially only on th...

The use of the separated beam at AGS for antiprotons and mesons ( pi / sup +/) is discussed. Beam design and layout is described. The target used for production of antiprotons is tungsten. An aluminum target is used for production of mesons ( pi /sup +/. Beam tuning and counting is described. (M.C.G.)

We demonstrate cooling of 104 antiprotons in a dense, cold plasma of ~108 positrons, confined in a nested cylindrical Penning trap at about 15 K. The time evolution of the cooling process has been studied in detail, and several distinct types of behavior identified. We propose explanations for these observations and discuss the consequences for antihydrogen ...

We present antiproton production in 11.7 AGeV/c Au+Au collisions measured in a wide transverse-mass coverage from the AGS-E866 experiment. We show indications for strong absorption effects of antiprotons in Au+Au collisions through comparison with p+A and...

The existence of a significant flux of antiprotons confined to Earth's magnetosphere has been considered in several theoretical works. These antiparticles are produced in nuclear interactions of energetic cosmic rays with the terrestrial atmosphere and accumulate in the geomagnetic field at altitudes of several hundred kilometers. A contribution from the decay of albedo ...

The existence of a significant flux of antiprotons confined to Earth's magnetosphere has been considered in several theoretical works. These antiparticles are produced in nuclear interactions of energetic cosmic rays with the terrestrial atmosphere and accumulate in the geomagnetic field at altitudes of several hundred kilometers. A contribution from the decay of albedo ...

This book constitutes the proceedings of a workshop on Low-Energy Cooled Antiprotons, and offers the first detailed and comprehensive picture of the Low-Energy Antiproton Ring (LEAR) facility and of initial experiments that are planned. Topics covered include the design of the CERN LEAR, low energy antiproton physics and the LEAR ...

Antiprotons are negatively charged protons that continuously slow down in matter until they are stopped and captured on the surface of a nucleus by a proton; in which case, both proton and antiproton annihilate into gammas, pions, and other short-lived particles. When an antiproton annihilates at rest on the surface of an actinide ...

This report documents the activities of the Snowmass 2001 T4 Particle Sources Working Group. T4 was charged with examining the most challenging aspects of positron sources for linear colliders and antiproton sources for proton-antiproton colliders, and the secondary beams of interest to the physics community that will be available from the next generation ...

This report documents the activities of the Snowmass 2001 T4 Particle Sources Working Group. T4 was charged with examining the most challenging aspects of positron sources for linear colliders and antiproton sources for proton-antiproton colliders, and the secondary beams of interest to the physics community that will be available from the next generation ...

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Antiprotonic helium is a unique atomic three-body system which is a mixture of particles and an antiparticle and yet shows metastability with lifetimes of a few microseconds before annihilation of the constituent antiproton. Using the antiprotons provided from the Antiproton Decelerator facility at CERN, Geneva, we ...

In this ``antimatter'' overview talk, I will cover the following topics: (1) Why antimatter experiments are important? (2) CERN's antiproton decelerator (AD), and the goals of the major experiments in the AD hall. (3) Antiprotonic helium laser spectroscopy pursued by the ASACUSA collaboration. In a series of measurements, the ...

Because of the potential application to power production, it is important to investigate a wide range of possible means to achieve nuclear fusion, even those that may appear initially to be infeasible. In antiproton catalyzed fusion, the negative antiproton shields the repulsion between the positively charged nuclei of hydrogen ...

We demonstrate three-dimensional imaging of antiprotons in a Penning trap, by reconstructing annihilation vertices from the trajectories of the charged annihilation products. The unique capability of antiparticle imaging has allowed, for the first time, the observation of the spatial distribution of the particle loss in a Penning trap. The radial loss of ...

Data were obtained with a proton-antiproton collider facility. The collision cross-section results are particularly interesting. The Feynman scaling law is violated and the value of cross-section limit grows logarithmically instead of remaining constant. ...

The energy spectra of charged pi -mesons enaitted from 377 annihilations of antiprotons in emulsion nuclei were measured. Six charged K- mesons were observed; this figure corresponds to the production of charged K- mesons in (8 plus or minus 3)% of annihilation events. Data on the mean free path of interaction of antiprotons ...

A schematic Monte Carlo simulation is used to examine the potential of exclusive hyperon-antihyperon pair production close to threshold in antiproton nucleus interactions to extract information on the interaction of antihyperons in nuclei. It is demonstrated that for ? /line ? pairs produced at antiproton momenta of 1.66 GeV/c the ...

A schematic Monte Carlo simulation is used to examine the potential of exclusive hyperon-antihyperon pair production close to threshold in antiproton nucleus interactions to extract information on the interaction of antihyperons in nuclei. It is demonstrated that for ? /line ? pairs produced at antiproton momenta of 1.66 GeV/c the ...

The Giessen Boltzmann-Uehling-Uhlenbeck transport model with relativistic mean fields is used to simulate pmacr -nucleus collisions. Antiproton absorption cross sections and momentum distributions of annihilation products are calculated by varying the pmacr coupling strength to the mean meson fields. Parameters of the ...

, the antiproton production target with magnetic separator and the storage ring HESR itself. Speci#12;c installations The HESR, a ring of 50 Tm magnetic bending power for 15 GeV antiprotons and protons, is characterized magnetic components and power supplies. This option could cause some complication in particular in the case

The antiproton-proton and antiproton-neutron annihilation processes are reviewed in the light of recent experimental investigations. This paper is aimed at stressing those features that could be among the fundamental ones in conceiving an antimatter-matter powered spacecraft. Annihilation product mean-energy versus time diagrams are ...

We report here the radial compression of a large number of antiprotons ( approximately 5 x 10(5)) in a strong magnetic field under ultrahigh vacuum conditions by applying a rotating electric field. Compression without any resonant structures was demonstrated for a range of frequencies from the sideband frequency of 200 kHz to more than 1000 kHz. The radial compression achieved ...

We report the first measurement of inclusive antiproton production at midrapidity in Au+Au collisions at square root of s(NN) = 130 GeV by the STAR experiment at RHIC. The antiproton transverse mass distributions in the measured transverse momentum range of 0.25

Well into its 10th year of running for physics, the Antiproton Decelerator (AD) supplies antiprotons to 4 different physics collaborations: ATRAP, ALPHA, ASACUSA and ACE. Antiprotons are injected at 3.5 GeV/ c, then cooled and decelerated before being extracted at 100, 300 or 500 MeV/ c in single or multi-batch mode. Here we will ...

We present new results from studies on diffractive dijet production and exclusive production of dijet and diphoton obtained by the CDF Collaboration in proton-antiproton collisions at the Fermilab Tevatron.

Current antiproton production techniques rely on high-energy collisions between beam particles and target nuclei to produce particle and antiparticle pairs, ...

The development of techniques to decelerate, cool and confine antiprotons in vacuo with an electromagnetic trap has opened a new research field of atomic physics of 'cold' antiprotons, including synthesis of antihydrogen atoms. At the Antiproton Decelerator (AD) facility at CERN, we the MUSASHI group of ASACUSA collaboration have so ...

... The origin of each pyrolytic by-product from AA2 can be deduced by examining set of pyrolysis products from each constituent. ...

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This Note describes a conference held in October 1987 to review the critical issues surrounding the establishment of a comprehensive U.S. antiproton research program and to help formulate its research goals. The conference was organized around three major themes: (1) basic machine, facility, and scale-up review--antiproton production ...

Recently the PAMELA experiment has released its updated anti-proton flux and anti-proton to proton flux ratio data up to energies of ? 200GeV. With no clear excess of cosmic ray anti-protons at high energies, one can extend constraints on the production of anti-protons from dark matter. In this ...

The PAMELA experiment is a satellite-borne apparatus designed to study charged particles, and especially antiparticles, in the cosmic radiation. The apparatus is mounted on the Resurs DK1 satellite which was launched on 15 June 2006. PAMELA has been traveling around the earth along an elliptical and semi-polar orbit for almost five years. It mainly consists of a permanent magnetic spectrometer, a ...

The satellite-borne experiment PAMELA has been used to make a new measurement of the cosmic-ray antiproton flux and the antiproton-to-proton flux ratio which extends previously published measurements down to 60 MeV and up to 180 GeV in kinetic energy. During 850 days of data acquisition approximately 1500 antiprotons were observed. The ...

Antiproton production in Ni+Ni collisions at 1.85 GeV/nucleon is studied in the relativistic Vlasov-Uehling-Uhlenbeck model. The self-energies of the antiproton are determined from the nucleon self-energies by the G-parity transformation. Also, the final-state interactions of the antiproton including both ...

Antiproton production in Ni+Ni collisions at 1.85 GeV/nucleon is studied in the relativistic Vlasov-Uehling-Uhlenbeck model. The self-energies of the antiproton are determined from the nucleon self-energies by the [ital G]-parity transformation. Also, the final-state interactions of the antiproton including both ...

We present results on antiproton production obtained in the AGS experiments E858 and preliminary results of E878. The yields of antiprotons in Si + A collisions are shown to sale with number of first collisions. The rapidity distributions for all targets (Au, Cu and Al) and both beams (si at 14.6 GeV/c and A at 11. GeV/c) have gaussian ...

Results are presented on hyperon-antihyperon production by 4 GeV/c protons in hydrogen. About 100,000 pictures taken in an antiproton beam from the CERN proton synchrotron with the 81 cm Saclay hydrogen bubble chamber were used. The production mechanism o...

Central S+S, S+Ag and S+Au collisions at 200 GeV/nucleon were studied in experiment NA35 at the CERN SPS. Recent results on strange particle production as well as the preliminary results on antiproton production are presented and discussed. Enhanced strangeness production relative to the pion and ...

The CERN Antiproton Accumulator (AA) fulfils its role as a p source for all the diverse needs at CERN ranging from a few 10Z p's in a single bunch for the Low Energy Antiproton Ring (LEAR) every hour or so up to 10 p's in 3 bunches for the Super Proton Synchrotron (SPS) Collider operations every 24 hours. The ...

In contrast to the large mass, complexity and recirculating power of conventional drivers for inertial confinement fusion (ICF), antiproton annihilation offers a specific energy of 90 MJ �g-1 and thus a unique form of energy packaging and delivery. In principle, antiproton drivers could provide a profound reduction in system mass for advanced space ...

By contrast to the large mass, complexity and recirculating power of conventional drivers for inertial confinement fusion (ICF), antiproton annihilation offers a specific energy of 90MJ/{micro}g and thus a unique form of energy packaging and delivery. In principle, antiproton drivers could provide a profound reduction in system mass for advanced space ...

In the extended magnetosphere of planets, antiprotons can be produced from the decay of cosmic ray antineutrons which are generated from interactions between cosmic rays and matter located in the vicinity of the planet. The antiproton source function competes with radial transport and losses from interactions with the exosphere, moons, dust, and other ...

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The possibility to produce, trap and study antihydrogen atoms rests upon the recent availability of extremely cold antiprotons in a Penning trap. Over the last five years, our TRAP Collaboration has slowed, cooled and stored antiprotons at energies 1010 lower than was previously possible. The storage time exceeds 3.4 months despite the extremely low ...

We have recently succeeded in decelerating and confining millions of antiprotons, 50 times more efficiently than conventional methods, in an electromagnetic trap. These antiprotons were cooled by preloaded electron plasma to an energy below an electronvolt. They were then extracted out of the magnetic field of 2.5 T and transported typically at 250 eV ...

A number of exclusive and inclusive antiproton reactions are discussed which could provide useful constraints or test novel features of quantum chromodynamics in the intermediate momentum transfer domain involving both perturbative and non-perturbative dynamics. High momentum transfer reactions are briefly reviewed. Inclusive antiproton reactions and the ...

We present the strategy which has been used recently to optimize the performance of the Fermilab Tevatron proton-antiproton collider. We use a relatively simple heuristic model based on the antiproton production rate, which optimizes the number of antiprotons in a store in order to maximize the integrated ...

The design of the antiproton source for the Fermilab Tevatron-I project (TeV-I) incorporates two separate rings. The Accumulator Ring uses a stochastic cooling/stacking system to accumulate a sufficient number of antiprotons for use in the Tevatron collider. The Debuncher Ring rotates buckets and debunches antiproton pulses from the ...

Experiments are described that have been designed to measure separately annihilation and reaction cross sections for antiprotons of approximately 450 MeV on oxygen, copper, silver, and lead. A new and more luminous spectrograph has been built for this experiment. The antiproton cross sections a r e compared with total proton cross sections, and are found ...

The PHENIX experiment at the Relativistic Heavy Ion Collider has performed systematic measurements of phi meson production in the K(+)K(-) decay channel at midrapidity in p + p, d + Au, Cu + Cu, and Au + Au collisions at root s(NN) = 200 GeV. Results are presented on the phi invariant yield and the nuclear modification factor R(AA) for Au + Au and Cu + Cu, ...

The PHENIX experiment at the Relativistic Heavy Ion Collider has performed systematic measurements of {phi} meson production in the K{sup +}K{sup -} decay channel at midrapidity in p+p, d+Au, Cu+Cu, and Au+Au collisions at {radical}s{sub NN} = 200 GeV. Results are presented on the {phi} invariant yield and the nuclear modification factor R{sub AA} for ...

Precision measurements of hyperon-antihyperon production with antiprotons permit detailed tests of strange quark pair production and decay. Recent measurements at LEAR of lambda-antilambda production are compared with selected calculations. A recent search in the K/sub s/K/sub s/ channel for xi(2230) formation and ...

... Publications for 2005 "Atoms Made Entirely of Antimatter: Two Methods Produce Slow Antihydrogen" (Review Paper) Page 4. G. Gabrielse Adv. At. ...

... and the Air Force Research Laboratory (AFRL) have recently established a ... Abstract: Current antiproton production techniques rely on high-energy ...

ensure adequate containment in antimatter rocket engines, mag- ... toroidal device consisting of a hollow vacuum vessel used for the production ...

We present results from Experiment 864 for antiproton production and antideuteron limits in Au + Pb collisions at 11.5 GeV/c per nucleon. We have measured invariant multiplicities for antiprotons for rapidities 1.4{lt}y{lt}2.4 at low transverse momentum as a function of collision geometry. When compared with the results from Experiment ...

We present the first results from the E864 Collaboration on the production of antiprotons in 10{percent} central 11.5A GeV /c Au+Pb nucleus collisions at the Brookhaven Alternating Gradient Synchrotron. We report invariant multiplicities for antiproton production in the kinematic region 1.4{lt}y{lt}2.2 and 50{lt} ...

... and to conform to production standards. Accuracy assessment (AA) sampling design followed the guidelines provided in the ... 1994) manuals with respect to the number of AA points sampled and their distri...

... types, map classification and descriptions, and accuracy assessment (AA) contingency tables. It also provides information on the ... producer's accuracy (conformance to production standards). The AA was p...

Acetaminophen (AA) is converted to a toxic electrophile that may subsequently form a glutathione conjugate (AA-GS). In addition to the toxication pathway metabolites, which consist of AA-GS and its hydrolysis products (AA-cysteinylglycine, AA-cysteine and ...

The CERN Antiproton Accumulator captures 3.5 GeV/c antiprotons with a nominal transverse acceptance of 100 mm.mrad in each plane. The transverse phase space population has been predicted by tracking antiprotons, created in the production target, through the transport line into the Accumulator. The predicted ...

To produce large amounts of antiprotons, on the order of several grams/year, use of machines to produce nuclear collisions are studied. These can be of either proton-proton, proton-nucleus and nucleus-nucleus in nature. To achieve high luminosity colliding beams, on the order of 10/sup 41/ m/cm/sup 2/, a self-colliding machine is required, rather than a conventional circular ...

Pyrolysis is the thermal decomposition of a substance into a variety of by-products, usually in the absence of oxygen. Pyrolysis experiments comparing the behavior of AA2 with the behavior of individual constituents of AA2 provide an excellent example of ...

... Active Ingredients. Dosage Form. AA, NC, Estriol, Estradiol, Capsules. AA, NC, Estriol, Estradiol, Estrone, Capsules. AA, NC, Progesterone, API. AB, MN, Estriol ...

... The apparatus includes an antiproton capture trap designed to trap and to cool antiprotons coming from the CERN Antiproton Decelerator (AD). ...

We have measured the yields of antiprotons in Au+Au interactions in the rapidity range 1.2{lt}{ital y}{lt}2.8 as a function of centrality using a beam line spectrometer. The shapes of the invariant multiplicity distributions at {ital p}{sub {ital t}}=0 are used to explore the dynamics of antiproton production and annihilation. ...

Antiproton production cross sections have been measured in minimum bias [ital p]+Be, [ital p]+Al, [ital p]+Cu, and [ital p]+Au collisions at 14.6 GeV/[ital c] with the E-802 spectrometer at the Brookhaven Alternating Gradient Synchrotron. The antiproton multiplicity at laboratory rapidities 1.0 to 1.6 shows almost no dependence upon ...

We present antiproton production in 11.7 AGeV/c Au+Au collisions measured in a wide transverse-mass coverage from the AGS-E866 experiment. We show indications for strong absorption effects of antiprotons in Au+Au collisions through comparison with p+A and Si+A collisions, and centrality dependence in Au+Au collisions.

Antiproton production in 11.7A GeV/c Au+Au collisions over a wide transverse-mass coverage was studied using the AGS-E866 experimental apparatus. The mean transverse kinetic energy increases as a function of centrality and is similar to that of protons. The antiproton yields in Si+Al , Si+Au , and Au+Au collisions are consistent with ...

The results from the PS185 experiment on antihyperon-hyperon production in antiproton-proton collisions at the CERN antiproton facility LEAR are reviewed. Emphasis is placed on the p-barp {yields} {lambda}-bar{lambda} channel for which there are high precision data. The use of a transversely polarised target in the PS185/3 experiment ...

The results from the PS185 experiment on antihyperon-hyperon production in antiproton-proton collisions at the CERN antiproton facility LEAR are reviewed. Emphasis is placed on the pp --> ?? channel for which there are high precision data. The use of a transversely polarised target in the PS185/3 experiment made it possible, by ...