2011 Particle Accelerator Conference - List of Authors (Gilson, E.P.)

Paper

Title

Page

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.

Slides WEOAS1 [18.657 MB]

WEP076

Masking the Paul Trap Simulator Experiment (PTSX) Ion Source to Modify the Transverse Distribution Function and Study Beam Stability and Collective Oscillations

1618

E.P. Gilson, R.C. Davidson, P. Efthimion, R. M. Majeski, E. Startsev, H. Wang
PPPL, Princeton, New Jersey, USA
M. Dorf
LLNL, Livermore, California, USA

Funding: Research supported by the U.S. Department of Energy.
A variety of masks were installed on the Paul Trap Simulator Experiment (PTSX) cesium ion source in order to perform experiments with modified transverse distribution functions. Masks were used to block injection of ions into the PTSX chamber, thereby creating injected transverse beam distributions that were either hollow, apertured and centered, apertured and off-center, or comprising five beamlets. Experiments were performed using either trapped plasmas or the single-pass, streaming, mode of PTSX. The transverse streaming current profiles clearly demonstrated centroid oscillations. Further analysis of these profiles also shows the presence of certain collective beam modes, such as azimuthally symmetric radial modes. When these plasmas are trapped for thousands of lattice periods, the plasma quickly relaxes to a state with an elevated effective transverse temperature and is subsequently stable. Both sinusoidal and periodic step function waveforms were used and the resulting difference in the measured transverse profiles will be discussed.

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 (n_p < n_b). 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.

WEP276

Development of an Advanced Barium Ion Source for a Laser-Induced-Fluorescence (LIF) Diagnostic on the Paul Trap Simulator Experiment (PTSX)

1996

H. Wang, R.C. Davidson, P. Efthimion, E.P. Gilson, R. M. Majeski
PPPL, Princeton, New Jersey, USA

The Paul Trap Simulator Experiment (PTSX) is a cylindrical Paul trap that simulates the nonlinear transverse dynamics of intense charged particle beam propagation through an equivalent kilometers-long magnetic alternating-gradient (AG) focusing system. Understanding the collective dynamics and instability excitations of intense charged particle beam is of great importance for a wide variety of accelerator applications. Since the optical spectrum of barium ions is better-suited to the Laser-Induced-Fluorescence (LIF) diagnostic than cesium ions, a barium ion source is being developed to replace the cesium ion source. A Laser-Induced-Fluorescence diagnostic will be able to provide in situ measurement of the radial density profile and, ultimately, the velocity distribution function of the intense charged particle beam. The new barium ion source is expected to increase the ion density as well as minimize the number of neutral barium atoms which enter the PTSX vacuum chamber. The design includes an ionizer, an extractor, and a neutral gas filter scheme. Initial test results of this new barium ion source will be presented.

Paper	Title	Page
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.
	Slides WEOAS1 [18.657 MB]

WEP076	Masking the Paul Trap Simulator Experiment (PTSX) Ion Source to Modify the Transverse Distribution Function and Study Beam Stability and Collective Oscillations	1618
	E.P. Gilson, R.C. Davidson, P. Efthimion, R. M. Majeski, E. Startsev, H. Wang PPPL, Princeton, New Jersey, USA M. Dorf LLNL, Livermore, California, USA
	Funding: Research supported by the U.S. Department of Energy. A variety of masks were installed on the Paul Trap Simulator Experiment (PTSX) cesium ion source in order to perform experiments with modified transverse distribution functions. Masks were used to block injection of ions into the PTSX chamber, thereby creating injected transverse beam distributions that were either hollow, apertured and centered, apertured and off-center, or comprising five beamlets. Experiments were performed using either trapped plasmas or the single-pass, streaming, mode of PTSX. The transverse streaming current profiles clearly demonstrated centroid oscillations. Further analysis of these profiles also shows the presence of certain collective beam modes, such as azimuthally symmetric radial modes. When these plasmas are trapped for thousands of lattice periods, the plasma quickly relaxes to a state with an elevated effective transverse temperature and is subsequently stable. Both sinusoidal and periodic step function waveforms were used and the resulting difference in the measured transverse profiles will be discussed.

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 (n_p < n_b). 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.

WEP276	Development of an Advanced Barium Ion Source for a Laser-Induced-Fluorescence (LIF) Diagnostic on the Paul Trap Simulator Experiment (PTSX)	1996
	H. Wang, R.C. Davidson, P. Efthimion, E.P. Gilson, R. M. Majeski PPPL, Princeton, New Jersey, USA
	The Paul Trap Simulator Experiment (PTSX) is a cylindrical Paul trap that simulates the nonlinear transverse dynamics of intense charged particle beam propagation through an equivalent kilometers-long magnetic alternating-gradient (AG) focusing system. Understanding the collective dynamics and instability excitations of intense charged particle beam is of great importance for a wide variety of accelerator applications. Since the optical spectrum of barium ions is better-suited to the Laser-Induced-Fluorescence (LIF) diagnostic than cesium ions, a barium ion source is being developed to replace the cesium ion source. A Laser-Induced-Fluorescence diagnostic will be able to provide in situ measurement of the radial density profile and, ultimately, the velocity distribution function of the intense charged particle beam. The new barium ion source is expected to increase the ion density as well as minimize the number of neutral barium atoms which enter the PTSX vacuum chamber. The design includes an ionizer, an extractor, and a neutral gas filter scheme. Initial test results of this new barium ion source will be presented.