Author: Kaganovich, I.
Paper Title Page
WEP118 Planned Experiments on the Princeton Advanced Test Stand 1707
 
  • A.D. Stepanov, R.C. Davidson, E.P. Gilson, L. Grisham, I. Kaganovich
    PPPL, Princeton, New Jersey, USA
 
  The Princeton Advanced Test Stand (PATS) is currently being developed as a compact experimental facility for studying the physics of high perveance ion beams, beam-plasma interactions, and volume plasma sources for use on the Neutralized Drift Compression Experiments NDCX-I/II. PATS consists of a six-foot-long vacuum chamber with numerous ports for diagnostic access and a pulsed capacitor bank and switching network capable of generating 100 keV ion beams. This results in a flexible system for performing experiments on beam neutralization by volume plasma relevant to NDCX-I/II. The PATS beamline will include an aluminosilicate source for producing a K+ beam, focusing optics, a ferroelectric plasma source (FEPS) and diagnostics including Faraday cups, Langmuir probes, and emittance scanners. Planned experiments include studying beam propagation through a tenuous plasma (np < nb). This regime is relevant to final stages of neutralized drift compression when the beam density begins to exceed the plasma density. The experiment will investigate charge neutralization efficiency, effects of plasma presence on beam emittance, and collective instabilities.  
 
WEP296 Effects of Errors of Velocity Tilt on Maximum Longitudinal Compression During Neutralized Drift Compression of Intense Beam Pulses 2038
 
  • I. Kaganovich, R.C. Davidson, E. Startsev
    PPPL, Princeton, New Jersey, USA
  • A. Friedman
    LLNL, Livermore, California, USA
  • S. Massidda
    Columbia University, New York, USA
 
  Funding: Research supported by the U.S. Department of Energy.
Neutralized drift compression offers an effective means for particle beam focusing and current amplification. In neutralized drift compression, a linear longitudinal velocity tilt is applied to the beam pulse, so that the beam pulse compresses as it drifts in the focusing section. The beam intensity can increase more than a factor of 100 in the longitudinal direction. We have performed an analytical study of how errors in the velocity tilt acquired by the beam in the induction bunching module limits the maximum longitudinal compression. It is found in general that the compression ratio is determined by the relative errors in the velocity tilt. That is, one-percent errors may limit the compression to a factor of one hundred. However, part of pulse where the errors are small may compress to much higher values determined by the initial thermal spread of the beam pulse. Examples of slowly varying and rapidly varying errors compared to the beam pulse duration are studied.
 
 
WEOAS1 Inertial Fusion Driven by Intense Heavy-Ion Beams 1386
 
  • W. M. Sharp, J.J. Barnard, R.H. Cohen, M. Dorf, A. Friedman, D.P. Grote, S.M. Lund, L.J. Perkins, M.R. Terry
    LLNL, Livermore, California, USA
  • F.M. Bieniosek, A. Faltens, E. Henestroza, J.-Y. Jung, A.E. Koniges, J.W. Kwan, E. P. Lee, S.M. Lidia, B.G. Logan, P.N. Ni, L.R. Reginato, P.K. Roy, P.A. Seidl, J.H. Takakuwa, J.-L. Vay, W.L. Waldron
    LBNL, Berkeley, California, USA
  • R.C. Davidson, E.P. Gilson, I. Kaganovich, H. Qin, E. Startsev
    PPPL, Princeton, New Jersey, USA
  • I. Haber, R.A. Kishek
    UMD, College Park, Maryland, USA
 
  Funding: Work performed under the auspices of the US Department of Energy by LLNL under Contract DE-AC52-07NA27344, by LBNL under Contract DE-AC02-05CH11231, and by PPPL under Contract DE-AC02-76CH03073.
Intense heavy-ion beams have long been considered a promising driver option for inertial-fusion energy production. This paper briefly compares inertial confinement fusion (ICF) to the more-familiar magnetic- confinement approach and presents some advantages of using beams of heavy ions to drive ICF instead of lasers. Key design choices in heavy-ion fusion (HIF) facilities are discussed, particularly the type of accelerator. We then review experiments carried out at Lawrence Berkeley National Laboratory (LBNL) over the past thirty years to understand various aspects of HIF driver physics. A brief review follows of present HIF research in the US and abroad, focusing on a new facility, NDCX-II, being built at LBNL to study the physics of warm dense matter heated by ions, as well as aspects of HIF target physics. Future research directions are briefly summarized.
 
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