The US is developing the physics and technology of induction accelerators for heavy-ion beam-driven inertial fusion. The recirculating induction accelerator repeatedly passes beams through the same set of accelerating and focusing elements, thereby reduci...

The gasdynamic partial differential equations (PDE's) governing the motion of an ablatively accelerated target (rocket) contain an inertial force term that arises mathematically from acceleration of the reference frame in which the PDE's are written, and ...

Induction linacs are among the most powerful accelerators in existence. They have accelerated electron bunches of several kiloamperes, and are being investigated as drivers for heavy ion driven inertial confinement fusion (HIF), which requires peak beam c...

A 3 MV, 800 kA, 24 ns electron beam accelerator is described and the results of initial switching experiments are discussed. The generator will provide a source for studying the physics of processes leading to electron beam driven, inertially confined fus...

Fundamental physics issues facing development of fusion power on a small-scale are assessed with emphasis on the idea of Inertial Electrostatic Confinement (IEC). The authors propose a new concept of accelerator-driven IEC fusion, termed Converging Beam Inertial Electrostatic Confinement (CB-IEC). CB-IEC offers a number of innovative ...

The gasdynamic partial differential equations (PDE's) governing the motion of an ablatively accelerated target (rocket) contain an inertial force term that arises from acceleration of the reference frame in which the PDE's are written. We give a simple, intuitive description of this effect, and estimate its magnitude ...

The promise of inertial fusion energy driven by heavy ion beams requires the development of accelerators that produce ion currents (approx 100's Amperes/beam) and ion energies ((approx) 1 - 10 GeV) that have not been achieved simultaneously in any existin...

Linear accelerators driven by pulse forming networks and utilizing beam neutralization may be useful for obtaining high-current ion beams for inertial fusion applications. Such accelerators may be subject to longitudinal velocity bunching instabilities. These instabilities are studied with a computer simulation of ...

A linear induction accelerator that produces a beam of energetic heavy ions (T approx. = 10 GeV, A approx. = 200 am..mu..) is a prime candidate as a driver for an inertial fusion power plant. Some early perceptions were that heavy-ion driven fusion would not be cost-competitive with other power sources because of the high cost of the ...

Two papers presented at the Shelter Island workshop are very briefly summarized here, in view of recent publications elsewhere The WARP code, developed for Heavy-Ion beam-driven inertial confinement Fusion (HIF) accelerator studies, combines features of a...

Large fusion devices will almost certainly produce net energy. However, a successful commercial fusion energy system must also satisfy important engineering and economic constraints. Inertial confinement fusion power plants driven by multi-stage, heavy-io...

The gasdynamic partial differential equations (PDE's) governing the motion of an ablatively accelerated target (rocket) contain an inertial force term that arises mathematically from acceleration of the reference frame in which the PDE's are written, and more physically from the requirement that part of the ablated ...

The escapement controlled, inertially responsive safety and arming switch is for use in missiles. All moving parts with the exception of the inertial mass 'sees' its design acceleration. The escapement is not exercised by spurious random accelerations.

Inertial confinement fusion driven by beams of heavy ions is an attractive route to controlled fusion. In the U.S., induction accelerators are being developed as {open_quotes}drivers{close_quotes} for this process. This paper is divided into two main sections. In the first section, the concept of ...

The Richtmyer-Meshkov (RM) instability is an interfacial interface between two fluids of different densities driven by shock waves and plays an important role in the studies of inertial confinement fusion and of supernovas. So far, most of the studies are for RM unstable interfaces driven by weak or intermediate shocks in planar ...

A high-speed framing camera is used to photograph deuterium and helium discharges in which flute instabilities are driven by the inertial force of a radial acceleration. The wavelength of the instability increases with decreasing initial pressure, suggesting the damping effect of viscosity; in some cases this damping ...

We present two indirect drive inertial fusion targets driven by heavy ions beams for fusion energy production. Because there are uncertainties in the ion beam focal spot size and uncertainties in the accelerator cost, we have tried to design targets that cover a large parameter space. One of the designs requires small ion beam focal ...

... changes of vehnioe motion (ie, vehicle translational accelerations) to compute velocity, the first time integral of acceleration, and distance, the ...

-Drive Inertial Fusion Energy (Rochester, NRL) Fast Ignition Inertial Fusion Energy (LLNL, Rochester) National Drivers (NRL) High-Repetition-Rate Solid-State Laser Drivers (LLNL) Heavy Ion Accelerator Drivers (LBNL and Tracking, Diagnostics and Control (GA, LLNL, NRL) Final Optics--Laser-Driven (LLNL) Final Optics

The new Schwerionen-Synchrotron (SIS)/Experimenteller Speicher-Ring (ESR) heavy ion accelerator facility (Nucl. Instrum. Methods A {bold 278}, 7, 19 (1989)), built for basic atomic and nuclear physics at Darmstadt (Federal Republic of Germany), also provides unique possibilities to study rf accelerator and beam/target interaction physics for ...

This paper presents a series of heavy ion driven, inertial confinement fusion targets that all have adequate gain (> 50) for inertial fusion energy. These targets are based on the distributed radiator concept in which much of the hohlraum is filled with low density converter material in approximate pressure balance. This target is ...

... Accession Number : ADD526872. Title : Single Coriolis Inertial Rate and Acceleration Sensor. Descriptive Note : Journal article,. ...

Pulsed power offers and efficient, high energy, economical source of x-rays for inertial confinement fusion (ICF) research. We are pursuing two main approaches to ICF driven with pulsed power accelerators: intense light ion beams and z-pinches. This paper describes recent progress in each approach and plans for future development.

Parametric instabilities excited by an intense electromagnetic wave in a plasma is a fundamental topic relevant to many applications. These applications include laser fusion, heating of magnetically-confined plasmas, ionospheric modification, and even particle acceleration for high energy physics. In laser fusion, these instabilities have proven to play an essential role in ...

We review the status of the experimental campaign being carried out at Lawrence Livermore National Laboratory, involving scaled investigations of the acceleration and transport of space-charge dominated heavy ion beams. The ultimate goal of these experiments is to help lay the groundwork for a larger scale ion driven inertial fusion ...

We review the status of the experimental campaign being carried out at Lawrence Livermore National Laboratory, involving scaled investigations of the acceleration and transport of space-charge dominated heavy ion beams. The ultimate goal of these experiments is to help lay the groundwork for a larger scale ion driven inertial fusion ...

Pulsed-power driven ion diodes generating quasi-static, (approximately)10 MV/cm, 1-cm scale-length electric fields are used to accelerate lithium ion beams for inertial confinement fusion applications. Atomic emission spectroscopy measurements contribute ...

The magnetic implosion of a high-Z quasi-spherical shell filIed with DT fuel by the 20-MA Z accelerator can heat the fuel to near-ignition temperature. The attainable implosion velocity on Z, 13-cm/ps, is fast enough that thermal losses from the fuel to t...

The US Inertial Fusion Energy (IFE) Program is developing induction accelerator technology toward the goal of electric power production using Heavy-Ion beam-driven inertial Fusion (HIF). The recirculating induction accelerator promises driver cost reduction by repeatedly passing the beam ...

Large fusion devices will almost certainly produce net energy. However, a successful commercial fusion energy system must also satisfy important engineering and economic constraints. Inertial confinement fusion power plants driven by multi-stage, heavy-ion accelerators appear capable of meeting these constraints. The reasons behind ...

Accelerator systems capable of driving inertial fusion targets are described. They are based on linear induction accelerator technology coupled with new methods of beam transport using electron neutralization of ion space charge. The resulting accelerator...

Radial transport of poloidal and toroidal angular momentum is rapid during a global reconnection event in the MST reversed field pinch experiment. Theoretical explanation has evolved for transport from Maxwell and Reynolds stresses from multiple nonlinearly coupled tearing modes. Comparing stresses from multimode computation with those for a single mode shows that nonlinear coupling (multiple ...

In our light ion inertial confinement fusion (ICF) program, fusion capsules are driven with an intense x-ray radiation field produced when an intense beam of ions penetrates a radiation case and deposits energy in a foam x-ray conversion region. A first step in the program is to generate and measure these intense fields on the Particle Beam Fusion ...

... An inertial/gradiometer system is simulated in ... NAVIGATION COMPUTERS, STABILIZED PLATFORMS, GRAVITY, ACCELERATION, RANDOM ...

The highly nonlinear evolution of the single-mode Rayleigh-Taylor instability (RTI) at the ablation front of an accelerated target is investigated in the parameter range typical of inertial confinement fusion implosions. A new phase of the nonlinear bubble evolution is discovered. After the linear growth phase and a short constant-velocity phase, it is ...

The highly nonlinear evolution of the single-mode Rayleigh-Taylor instability (RTI) at the ablation front of an accelerated target is investigated in the parameter range typical of inertial confinement fusion implosions. A new phase of the nonlinear bubble evolution is discovered. After the linear growth phase and a short constant-velocity phase, it is ...

In a thin elongated current sheet, it is likely that more than one X-line forms and thus multiple magnetic islands are produced. The islands are then subject to merging. By simulating such a case with a two-dimensional full-particle code, we show that a merger forming a large island produces the most energetic electron population in the system. By setting the lateral extent of the simulation box ...

The Heavy Ion Fusion Science Virtual National Laboratory, a collaboration of LBNL, LLNL, and PPPL, is studying Warm Dense Matter physics driven by ion beams, and basic target physics for heavy ion-driven Inertial Fusion Energy. A low-cost path toward the next-step facility for this research, NDCX-II, has been enabled by the recent ...

The U.S. is developing fusion energy based on inertial confinement of the burning fusion fuel, as a complement to the magnetic confinement approach. DOE's Inertial Fusion Energy (IFE) program within the Office of Fusion Energy Sciences (OFES) is coordinated with, and gains leverage from, the much larger Inertial Confinement ...

Pulsed power accelerators are being used in Inertial Confinement Fusion (ICF) research. In order to achieve our goal of a fusion yield in the range of 200 - 1000 MJ from radiation-driven fusion capsules, it is generally believed that {approx}10 MJ of driver energy must be deposited within the ICF target in order to deposit {approx}1 MJ ...

Current research is described on pulsed power ion accelerators for inertial fusion, i.e., ion diodes and collective accelerators. Particle beam energy and power requirements for fusion, and basic deposition characteristics of charged particle beams are di...

We have suggested a concept of laser-driven shock tube (LST) for generation of hypersonic shock waves (SW) in gases and compression waves in liquids. This novel laboratory technique might be applied to the studies of various fundamental hydrodynamic phenomena such as development of hydrodynamic instabilities at contact interfaces between different liquids and gases ...

Feb 7, 2009 ... The SIGIs are the inertial navigation sensors for the PA-1 vehicle. These sensors measure the inertial accelerations, and ...

Inertial Surveying is the process of ascertaining position and gravity field parameters from measured accelerations. Typically, the observer traverses the survey course in a vehicle such as a van or helicopter and operates instrumentation which records th...

The requirements for a heavy-ion demonstration experiment to achieve useful electric power generation through inertial confinement fusion are discussed. (MOW)

The idea of using nuclear fusion as a source of commercial electrical power has been pursued worldwide since the 1950s. Two approaches, using magnetic and inertial confinement of the reactants, are under study. This paper describes the difference between the two approaches, and discusses in more detail the heavy-ion-driven inertial ...

Multi-Mev proton beams generated by target normal sheath acceleration (TNSA) during the interaction of an ultra intense laser beam (I?1019 W/cm2) with a thin metallic foil (thickness of the order of a few tens of microns) are particularly suited as a particle probe for laser plasma experiments. The proton imaging technique employs a laser-driven proton ...

Key scientific results from recent experiments, modeling tools, and heavy ion accelerator research are summarized that explore ways to investigate the properties of high energy density matter in heavy-ion-driven targets, in particular, strongly-coupled plasmas at 0.01 to 0.1 times solid density for studies of warm dense matter, which is a frontier area in ...

Key scientific results from recent experiments, modeling tools, and heavy ion accelerator research are summarized that explore ways to investigate the properties of high energy density matter in heavy-ion-driven targets, in particular, strongly-coupled plasmas at 0.01 to 0.1 times solid density for studies of warm dense matter, which is a frontier area in ...

Key scientific results from recent experiments, modeling tools, and heavy ion accelerator research are summarized that explore ways to investigate the properties of high energy density matter in heavy-ion-driven targets, in particular, strongly-coupled plasmas at 0.01 to 0.1 times solid density for studies of warm dense matter, which is a frontier area in ...

A hemispherical conically guided indirectly driven inertial confinement fusion capsule has been considered. The fast ignition of the precompressed capsule driven by one or two laser-accelerated proton beams has been numerically investigated. The energy distribution of the protons is Gaussian with a mean energy of ...

A two-stage impact fusion concept is proposed. In it the first booster stage is a magnetized low density DT target driven by a projectile accelerated up to approximately 20 km/sec. The thermonuclear energy released in the booster stage is used to drive a second stage high density target by ablative implosion, resulting in the release of large quantities of ...

Peak x-ray powers as high as 280 {+-} 40 TW have been generated from the implosion of tungsten wire arrays on the Z Accelerator at Sandia National Laboratories. The high x-ray powers radiated by these z-pinches provide an attractive new driver option for high yield inertial confinement fusion (ICF). The high x-ray powers appear to be a result of using a ...

Recyclable transmission lines (RTL) are studied as a means of repetitively driving z pinches. The lowest reprocessing costs should be obtained by minimizing the mass of the RTL. Low mass transmission lines (LMTL) could also help reduce the cost of a single shot facility such as the proposed X-1 accelerator and make z-pinch driven space propulsion feasible. ...

Ion acceleration from laser-driven targets is of interest to fast ignition (FI) inertial confinement fusion applications. One of the critical questions which must be addressed, however, is whether the ion beams generated from ultra-intense lasers can be made efficient enough and bright enough to ignite a target plasma with realistic ...

We evaluated the contributions to magnetospheric pressure (ring current) of the solar wind, polar wind, auroral wind, and plasmaspheric wind, with the surprising result that the main phase pressure is dominated by plasmaspheric protons. We used global simulation fields from the LFM single fluid ideal MHD model. We embedded the Comprehensive Ring Current Model within it, driven ...

A simple model has been derived for the expansion of a thin (up to 100s of nm thickness), solid-density target driven by an u.ltraintense laser. In this regime, new ion acceleration mechanisms, such as the Break-Out Afterburner (BOA) [1], emerge with the potential to dramatically improve energy, efficiency, and energy spread of ...

The research into advanced acceleration concepts for electron linear accelerators being pursued at SLAC is reviewed. This research includes experiments in laser acceleration, plasma wakefield acceleration, and mmwavelength RF driven accelerators.

The promise of inertial fusion energy driven by heavy ion beams requires the development of accelerators that produce ion currents ({approx}100s Amperesheam) and ion energies ({approx}1-10 GeV) that have not been achieved simultaneously in any existing accelerator. The high currents imply high generalized ...

The High Energy Density and Exotic Acceleration working group took as our goal to reach beyond the community of plasma accelerator research with its applications to high energy physics, to promote exchange with other disciplines which are challenged by related and demanding beam physics issues. The scope of the group was to cover particle ...

Advances are reported in the theory and experiments investigating Inertial Confinement Fusion with light ion beams on the Particle Beam Fusion Accelerator II (PBFA II). Impedance of the accelerating gap, electron-ion instabilities, proton beam generation ...

This report reviews the existing state of knowledge concerning the evaluation of the forces imposed on a body in a fluid due to acceleration of either the body or the fluid. It concentrates on those fluid inertial forces due to acceleration rather than on...

During the past two years, significant experimental and theoretical progress has been made in the US heavy ion fusion science program in longitudinal beam compression, ion-beam-driven warm dense matter, beam acceleration, high brightness beam transport, and advanced theory and numerical simulations. Innovations in longitudinal compression of intense ion ...

During the past two years, significant experimental and theoretical progress has been made in the US heavy ion fusion science program in longitudinal beam compression, ion-beam-driven warm dense matter, beam acceleration, high brightness beam transport; and advanced theory and numerical simulations. Innovations in longitudinal compression of intense ion ...

This study parametrically examines the implications on inertial-fusion-reactor design of the use of direct-drive pellets as an alternative to the radiation-driven targets. We have examined the impacts of direct illumination on mirror damage constraints, reactor neutronic performance, and system energetics and cost. The capital costs for low f/number, ...

... It applies Lagrange's equations to a longitudinal problem in inertial coordinates, then transforms the equations to noninertial, body - fixed ...

... This problem is further enhanced by a limited ... for the purpose of motion control, inertial accelerations ... These processes are therefore relatively slow. ...

The dynamic acceleration environment observed on Space Shuttle flights to date and predicted for the

... beam and target uniformity requirements ... Descriptors : *LASER BEAMS, *ABLATION ... INTERACTIONS, HYDRODYNAMICS, LASERS, INTENSITY ...

... measurement reference for the nystagmus phase data that would precisely define ... the instantaneous inertial angular acceleration of the skull as the ...

Two papers presented at the Shelter Island workshop are very briefly summarized here, in view of recent publications elsewhere The WARP code, developed for Heavy-Ion beam-driven inertial confinement Fusion (HIF) accelerator studies, combines features of a particle-in-cell plasma simulation and an accelerator ...

Two papers presented at the Shelter Island workshop are very briefly summarized here, in view of recent publications elsewhere. The WARP code, developed for Heavy-Ion beam-driven inertial confinement Fusion (HIF) accelerator studies, combines features of a particle-in-cell plasma simulation and an accelerator ...

Two papers presented at the Shelter Island workshop are very briefly summarized here, in view of recent publications elsewhere. The WARP code, developed for Heavy-Ion beam-driven inertial confinement Fusion (HIF) accelerator studies, combines features of a particle-in-cell plasma simulation and an accelerator ...

This article provides an overview of current U.S. research on accelerators for Heavy Ion Fusion, that is, inertial fusion driven by intense beams of heavy ions with the goal of energy production. The concept, beam requirements, approach, and major issues are introduced. An overview of a number of new experiments is presented. These ...

This article provides an overview of current U.S. research on accelerators for Heavy Ion Fusion, that is, inertial fusion driven by intense beams of heavy ions with the goal of energy production. The concept, beam requirements, approach, and major issues are introduced. An overview of a number of new experiments is presented. These ...

Pulsed-power driven ion diodes generating quasi-static, {approximately}10 MV/cm, 1-cm scale-length electric fields are used to accelerate lithium ion beams for inertial confinement fusion applications. Atomic emission spectroscopy measurements contribute to understanding the acceleration gap physics, in particular ...

The Virtual National Laboratory for Heavy-Ion Fusion Science is now constructing NDCX-II, an accelerator facility for studying ion-heated warm dense matter and aspects of ion-driven targets for inertial-fusion energy. Plans call for using twelve or more induction cells to accelerate 30-50 nC of Li^+ ions to 1.2-3 ...

An inertial locking mechanism of a seatbelt is designed to prevent further seatbelt extension when it exceeds an acceleration threshold. The acceleration threshold varies with the orientation of the mechanism and direction of acceleration. A setup and procedure were created to test the ...

Research on acceleration (G), such as experienced in aircraft and space vehicles, is reviewed in terms of effects on human performance capabilities. Almost all such research has been conducted on human centrifuges, with the the inertial force vectors in t...

Sep 22, 2004 ... Elementary introduction to accelerated frames of reference; part of an educational web site on astronomy, mechanics, and space.

Construction of the Neutralized Drift Compression Experiment-II (NDCX-II) is underway at LBNL; completion is due March, 2012. This ion induction accelerator will enable studies of Warm Dense Matter and basic target physics for heavy-ion-driven Inertial Fusion Energy. NDCX-II compresses and accelerates a 20-50 nC ...

The hydrodynamic stability of laser-driven polymer foils and imploding polymer shells is expected to improve when radiative preheat occurs ahead of the ablation front before the target starts to accelerate. This preheat, produced by radiation from various additives in the hot corona, is simulated in one dimension to assess the dependence of the stability ...

When the authors first proposed an accelerator-driven reactor, the concept was opposed by physicists who had earlier used the accelerator for their physics experiments. This opposition arose because they had nuisance experiences in that the accelerator wa...

The Accelerator Performance Demonstration Facility is the front-end prototype of a CW accelerator useful for accelerator-driven technologies. Its purpose is for evaluating the reliability, availability, and maintainability of a high-current and high-power...

The concept of a light ion beam driver for Inertial Fusion Energy (IFE) is based on multi-terawatt, multi-megavolt pulsed power generators, two-stage ion acceleration and charge neutralised transport. In this paper we discuss the present status for each of these components and identify the main issues for research. Only modest extrapolations from presently ...

Inertial modes are oscillatory modes in rotating fluids. Shear layers appear in inertial modes in spherical shells that become singularities in the inviscid limit. It is shown here that the nonlinearity in the shear layers drives a zonal flow whose amplitude diverges in the inviscid limit. These results are relevant for the dynamics of planets and stars in ...

Research on forming, compressing, and accelerating milligram-range compact toroids using a meter diameter, two-stage, puffed gas, magnetic field embedded coaxial plasma gun is described. The compact toroids that are studied are similar to spheromaks, but they are threaded by an inner conductor. This research effort, named MARAUDER (Magnetically Accelerated ...

When a terawatt-peak-power laser beam is focused into a gas jet, an electron plasma wave, driven by forward Raman scattering, is observed to accelerate a naturally collimated beam of electrons to relativistic energies (up to 10 9 total electrons, with an energy distribution maximizing at 2 MeV, a transverse emittance as low as 1 mm-mrad and a field ...

A microgravity environment is one that will impart to an object a net acceleration that is small compared with that produced by Earth at its surface. In practice, such acceleration will range from about one percent of Earth's gravitational acceleration to better than one part in a million. this teacher's guide presents an introduction ...

Inertial fusion science is driven by 'the quest for ignition'. For many years, a 'conventional' route towards inertial fusion has been investigated using two different approaches: ignition by an inertial central hot spot could be obtained either through the direct or the indirect drive scheme. Both imply the use of ...

The U.S. is developing the physics and technology of induction accelerators for heavy-ion beam-driven inertial fusion. The recirculating induction accelerator repeatedly passes beams through the same set of accelerating and focusing elements, thereby reducing both the length and gradient of the ...

The US is developing the physics and technology of induction accelerators for heavy-ion beam-driven inertial fusion. The recirculating induction accelerator repeatedly passes beams through the same set of accelerating and focusing elements, thereby reducing both the length and gradient of the ...

The multiple beam accelerator MBE-4 is a device for research toward a heavy ion driver for inertial confinement fusion, based on the induction linac concept. Its main goal is proof of the principle of current amplification by acceleration and controlled self-similar beam pulse compression. Into the 16-m long device four beams, each ...

This study of inertial confinement fusion (ICF) reactor control investigated concepts of the type intended to be driven by laser, electron, or light-ion pulsed energy beams. The study delineates the major reactor control functions, the methods and techniq...

Two 60 kw gas turbine driven generator sets were operated simultaneously at rated load in a controlled dusty environment. One of the units was protected with an inertial type air cleaner; the other was unprotected. The objective of the test was to provide...

The promise of inertial fusion energy driven by heavy ion beams requires the development of accelerators that produce ion currents (approx 100's Amperes/beam) and ion energies ({approx} 1 - 10 GeV) that have not been achieved simultaneously in any existing accelerator. The high currents imply high ...

Heavy ion accelerators are the most recent entrants in the effort to identify a practical driver for inertial confinement fusion. They are of interest because of the expected efficient coupling of ion kinetic energy to the thermal energy needed to implode the pellet and because of the good electrical efficiency of high intensity particle ...

The Heavy Ion Inertial Fusion Program is the principal part of the Inertial Fusion Energy Program in the Office of Fusion Energy of the U.S. Department of Energy. The emphasis of the Heavy Ion Program is the development of accelerators for fusion power production. Target physics research and some elements of fusion chamber development ...

... Accession Number : ADA057287. Title : A Laser-Driven Pellet Accelerator for CTR Fuel Injection. Descriptive Note : Master's thesis,. ...

Recent advances in energy storage, switching and magnet technology make electromagnetic acceleration a viable alternative to chemical propulsion for certain tasks, and a means to perform other tasks not previously feasible. Launchers of interest include the dc railgun driven by energy stored inertially in a homopolar generator and ...

Laser-driven acceleration holds great promise for significantly improving accelerating gradient. However, scaling the conventional process of structure-based acceleration in vacuum down to opticalerent kind of structure. We require an optical waveguide th...

Plasma accelerators may be driven by the ponderomotive force of an intense laser or the space-charge force of a charged particle beam. The implications for accelerator design and the different physical mechanisms of laser-driven and beam-driven plasma acceleration are ...

The spin-dependent inertial force in an accelerating system under the presence of electromagnetic fields is derived from the generally covariant Dirac equation. Spin currents are evaluated by the force up to the lowest order of the spin-orbit coupling in both ballistic and diffusive regimes. We give an interpretation of the inertial ...

Theoretical investigations of plasma-based accelerators and other advanced accelerator concepts. The focus of the work was on the development of plasma based and structure based accelerating concepts, including laser-plasma, plasma channel, and microwave driven plasma accelerators.

... Descriptors : *CARBON DIOXIDE LASERS, LASER APPLICATIONS, RAMAN SCATTERING, ELECTRON ACCELERATORS, LINEAR ...

Progress in inertial confinement fusion (ICF) has been very rapid over the past two years. Significant advances have been made in the production of smooth laser beams, the focusing of light ions beams, and the development of heavy ion accelerators. The av...

An accelerometer is described, which is equipped with a rotary-drive vibratory-output to obtain inertial acceleration, as an inertial guidance component of a rocket vehicle, as well as other such applications. The accelerometer has the advantage of elimin...

An accelerometer is studied which has a rotary-drive vibratory-output in order to obtain inertial acceleration as an inertial guidance component of a rocket vehicle, as well as other such applications. The accelerometer has the advantage of eliminating cr...

A strapdown inertial measuring system for measuring angular rate and linear accelerations about a spacecraft is disclosed. The system uses an annular momentum control device (AMCD) as the basic sensor. Features of the device include reliability, zero fric...

High-performance spinning-flight vehicle have always presented a difficult set of requirements for inertial measurement systems (IMSs). These requirements typically include high levels of vibration and shock, as well as high levels of acceleration and ang...

The use of a thin membrane to suspend an (inertial fusion energy) fuel capsule in a holder for injection into a reactor chamber is investigated. Capsule displacement and membrane deformation angle are calculated for an axisymmetric geometry for a range of...

A low cost inertial navigation system (INS) concept is described for flight missions characterized by moderate accelerations and limited attitude variations. These missions involve general aviation aircraft, helicopters, or remotely piloted vehicles. The ...

The achievement of high gain with inertial fusion requires the compression of hydrogen isotopes to high density and temperatures. High densities can be achieved most efficiently by isentropic compression. This requires relatively slow pressure pulses on the order of 10-20 nanoseconds; however, the pressure profile must have the appropriate time. We present 1-D numerical ...

The Particle Beam Fusion Accelerator-II (PBFA-II) is a large, high power accelerator being constructed at Sandia National Labs to conduct research in inertial confinement fusion. One key to the success of this machine is the ability to produce an electric...

Recirculating induction accelerators (recirculators) have been investigated as possible drivers for inertial fusion energy production because of their potential cost advantage over linear induction accelerators. Point designs were obtained and many of the...

Theory is developed to estimate the effect of free surface proximity on the initial added mass of a sphere accelerated vertically upward from rest in an ideal fluid. It is assumed that the acceleration regime is sufficiently brief that inertial forces pre...

The increase in +Gz acceleration (the inertial force vector acting in a head-to-foot direction) tolerance afforded by static forearm muscular contraction (handgrip) was evaluated and compared with that of the standard G suit. Acceleration tolerance was as...

Mid-Z ion driven fast ignition inertial fusion requires ion beams of hundreds of MeV energy and <10% energy spread. The break-out afterburner (BOA) is one mechanism proposed to generate such beams; however, the late stages of the BOA tend to produce too large of an energy spread. Here we show how use of a second target foil placed behind a nm-scale foil ...

The experimental study of the behavior of deuterium plasma with densities between 2�1018 and 2�1020 cm-3, subjected to a 6 TW, 30 ps, 3�1018 W cm-2 laser pulse, is presented. Conclusive experimental proof that a single straight channel is generated when the laser pulse interacts with the lowest densities is provided. This channel shows no small-scale longitudinal density modulations, extends ...

While beam loss issues have hardly been considered in detail for heavy ion fusion scenarios, recent heavy ion machine developments in different labs (European Organization for Nuclear Research(CERN), Gesellschaft f�r Schwerionenforschung (GSI), Institute for Theoretical and Experimental Physics (ITEP), Relativistic Heavy-Ion Collider (RHIC)) have shown the great importance of beam current ...

In this paper we discuss design calculations for high yield inertial fusion capsules, indirectly driven by a double-ended z-pinch-driven hohlraum radiation source. The z-pinches are imploded by a high current (- 60 MA) accelerator while enclosed within a hohlraum. Radial spoke arrays and shine shields isolate the ...

clock error model is further simplified to a linear system driven by a white ... inertial navigation sensors, such as 3 axis accelerometers, will be used in a filter ...

... Abstract : A charge particle beam driven inertial confinement fusion reactor will require reduced density, current carrying channels through the gas ...

... at sea, which combine inertial navigation systems (INS) with data-driven methods based on the Displaced Phase Centre Antenna (DPCA) technique ...

... Report Date : MAR 1992. ... Abstract : A preliminary design study of a nuclear-pumped laser-driven inertial confinement fusion reactor with a ...

in AFRD, that joins us with Lawrence Livermore National Laboratory and the Princeton Plasma Physics Laboratory in close collaboration on inertial fusion driven by beams of heavy...

Significant experimental and theoretical progress has been made in the U.S. heavy ion fusion program on high-current sources, transport, final focusing, chambers and targets for inertial fusion energy (IFE) driven by induction linac accelerators seek to provide the scientific and technical basis for the Integrated Beam Experiment ...

Significant experimental and theoretical progress has been made in the US heavy-ion fusion program on high-current sources, injectors, transport, final focusing, chambers and targets for high-energy density physics (HEDP) and inertial fusion energy (IFE) driven by induction linac accelerators. One focus of present research is the beam ...

Significant experimental and theoretical progress has been made in the U.S. heavy ion fusion program on high-current sources, injectors, transport, final focusing, chambers and targets for high energy density physics (HEDP) and inertial fusion energy (IFE) driven by induction linac accelerators. One focus of present research is the ...

Significant experimental and theoretical progress has been made in the U.S. heavy ion fusion program on high-current sources, injectors, transport, final focusing, chambers and targets for high energy density physics (HEDP) and inertial fusion energy (IFE) driven by induction linac accelerators. One focus of present research is the ...

Significant experimental and theoretical progress has been made in the U.S. heavy ion fusion program on high-current sources, injectors, transport, final focusing, chambers and targets for high energy density physics (HEDP) and inertial fusion energy (IFE) driven by induction linac accelerators. One focus of present research is the ...

Ions in inertial electrostatic confinement (IEC) systems are accelerated radially by an electrostatic field between two spherical grids, a configuration in which ^3He-^3He fusion has previously been demonstrated as part of the advanced fuels program at the University of Wisconsin [1]. A campaign is underway to enhance the experimental setup, in order to ...

Hydrodynamic stability and gain of two classes of direct-drive inertial confinement fusion capsule designs for the NIF are analyzed by using a postprocessor(V. N. Goncharov et al., Phys. Plasmas 7, 5118 (2000).) to the 1-D hydrodynamic code LILAC to calculate target distortion and by using the ignition model(W. K. Levedahl and J. D. Lindl, Nucl. Fusion 37, 165 (1997); R. ...

In heavy-ion-driven inertial fusion accelerator concepts, dynamic aperture is important to the cost of the accelerator, most especially for designs which envision multibeam linacs, where extra clearance for each beam greatly enlarges the transverse scale of the machine. In many designs the low-energy end of such an ...

The accelerator facilities at GSI, consisting of a high current radio frequency quadrupole accelerator (MAXILAC), a rf-linac (UNILAC), a heavy ion synchrotron (SIS) and an experimental storage ring (ESR) provide unique opportunities to study beam target interaction phenomena over a wide range of beam energy. This range extends from 45 keV/u up to 2 GeV/u. ...

In Minkowski space, an accelerated reference frame may be defined as one that is related to an inertial frame by a sequence of instantaneous Lorentz transformations. Such an accelerated observer sees a causal horizon, and the quantum vacuum of the inertial observer appears thermal to the ...

The origin of inertia has intrigued scientists and philosophers for centuries. Inertial frames of reference permeate our daily life. The inertial and centrifugal forces, such as the pull and push that we feel when our vehicle accelerates, brakes and turns, arise because of changes in velocity relative to uniformly moving ...

... Pseudoresonant Laser Wakefield Acceleration ... these mechanisms have practical limits to the max - imum length of the acceleration regions. ...

Optimized cost estimates for induction linac accelerators using mass 133 ions at a charge state of +2 producing inertial fusion target yields of 300, 600, and 1200 MJ are presented. The ions are injected into the accelerator at 3 MV, and accelerated to th...

The inertial navigation system uses both gyroscopes and accelerometers to measure the state of motion of a target or a vehicle by sensing the changes in that state caused by accelerations. The required features in many of these applications are high precision, wide dynamic range and wide frequency range. In this paper, recent advances made on Wireless ...

The promise of inertial fusion energy driven by heavy ion beams requires the development of accelerators that produce ion currents ({approx}100's Amperes/beam) and ion energies ({approx}1-10 GeV) that have not been achieved simultaneously in any existing accelerator. The high currents imply high ...

A reply to the comment on unlimited electrons acceleration in laser-driven plasma waves is presented.

The heliocentrifugal motion of coronal loop transients is likely driven largely by the buoyant force

When the authors first proposed an accelerator-driven reactor, the concept was opposed by physicists who had earlier used the accelerator for their physics experiments. This opposition arose because they had nuisance experiences in that the accelerator was not reliable, and very often disrupted their work as the ...

The acceleration efficiency of a laser driven linear accelerator is analyzed. The laser power, loss factor and impedances determine the maximum charge that can be accelerated and the efficiency of that acceleration. The accelerator structure can be incorporated into a laser ...

A muscle produces moments at the joints it crosses, but these moments can also cause accelerations at joints not crossed by the muscle. This phenomenon, the acceleration of a joint caused by a muscle not crossing the joint, is referred to as induced acceleration. For a system of rigid bodies this study examines how system ...

in the Apollo 8 Inertial Measurement Unit (IMU) during the flight. ..... to Acceleration Along the Spin Axis (ADSRA Y). The ADSRAY term varied by 2 sigma ...

tension force, shown in Equation 1 and the Froude number (Fr), the ratio of inertial force to acceleration force shown in Equation. ...

... The magnitude of the terims arisinS from Coriolis acceleration is very small. For example, if the aircraft has I3!.I Page 7. S TP 4653 ...

The Inertial Navigation System (INS) on the ER-2 operates by sensing accelerations from a gyro-stabilized, all-attitude platform. This information is integrated by ...

... the trajectory of the vehicle with respect to both inertial space and earth fixed coordinates, the velocity and total acceleration time histories of the ...

This paper addresses the attitude determination, acceleration transformation, and attitude/heading output computational operations performed in modern-day strapdown inertial navigation systems. Contemporary algorithms are described for implementing these ...

... inspects an Inertial Navigation System (INS) component sensors on a vehicle that determine angular velocity and linear acceleration at various points. ...

superior short-term stability. The drag-free proof masses act as inertial sensors to control the residual acceleration level on the PLM in order to maintain ...

... Side Airbag Acceleration Sensor. Source: Bosch Technology ... 4(B)-13 Surface Micromachined Capacitive Accelerometers Robert Bosch GmbH ...

The rotation rate is provided by a Fiber Optic Gyro (FOG) sensor, while the accelerations are provided by silicon accelerometers. ...

The rotation rate is provided by a Fiber Optic Gyro (FOG) sensor, while the accelerations are provided by silicon accelerometers. ...

LBL and LLNL propose to build, at LBL, the Induction Linac Systems Experiments (ILSE), the next logical step towards the eventual goal of a heavy-ion induction accelerator powerful enough to implode or ``drive`` inertial-confinement fusion targets. ILSE, although much smaller than a driver, will be the first experiment at full driver scale in several ...

LBL and LLNL propose to build, at LBL, the Induction Linac Systems Experiments (ILSE), the next logical step towards the eventual goal of a heavy-ion induction accelerator powerful enough to implode or drive'' inertial-confinement fusion targets. ILSE, although much smaller than a driver, will be the first experiment at full driver ...

the triaxial accelerations on the total system. The excitation was applied ...... (Deformed shape _,. Undeformed shape ....... ) .... .00 "I_{XE ...

However, the buoyancy may be important locally, for example, in the low- momentum region of the jet shear layer. Buoyant acceleration of the low-density ...

The equations for the displacement, velocity, and acceleration of a point in a nutating body are developed. These are used to derive equations for the inertial moment developed by a nutating body of arbitrary shape. Calculations made for a previously desi...

100 winner from the Ion Beam Technology Group; an accelerator for studying high-energy-density physics and working toward inertial fusion energy; an innovation in super-precise...

The cost of induction linac accelerators for inertial fusion using mass 200 ions at a charge state of +3 for target yields of 300, 600, and 1200 MJ is presented. The ions are injected into the accelerator at 3 MV, and accelerated to the required voltage appropriate to the desired target yield. A cost comparison of ...

The cost of induction linac accelerators for inertial fusion using mass 200 ions at a charge state of +3 for target yields of 300, 600, and 1200 MJ is presented. The ions are injected into the accelerator at 3 MV, and accelerated to the required voltage appropriate to the desired target yield. A cost comparison of ...

Demonstration of thermonuclear ignition and gain on a laboratory scale is one of science's grand challenges. The National Ignition Facility (NIF) is committed to achieving inertial confinement fusion (ICF) by 2010. Success in this endeavor depends on four elements: the laser driver performance, target design, experimental diagnostics performance, and target ...

The concept of a subcritical system driven by an external source of neutrons provided by an accelerator ADS (Accelerator Driver System) has been recently revived and is becoming more popular in the world technical community with active programs in Europe,...

This project will analyze and design a novel oblique-detonation-wave (ODW), ram- accelerator-driven propulsion concept for the acceleration of tube-launched ...

the kinematic viscosity of water, is in the range of 0.03�3. As shown in Fig. 1, at low flow velocities the jet of essentially fresh water viscously entrained from above by the jet to the point at which buoyancy drivesInertially driven buckling and overturning of jets in a Hele-Shaw cell Adriana I. Pesci, Martin A

A preliminary design study of a nuclear-pumped laser-driven inertial confinement fusion reactor with a magnetically protected first wall using an advanced DT-ignited, DD-fueled pellet demonstrated the feasibility of such a concept. This paper presents a p...