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| MOOBC02 |
Experiments in Warm Dense Matter using an Ion Beam Driver
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140 |
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- F. M. Bieniosek, M. Leitner, B. G. Logan, R. More, P. N. Ni, P. K. Roy
LBNL, Berkeley, California
- J. J. Barnard, M. Kireeff Covo, A. W. Molvik
LLNL, Livermore, California
- L. Grisham
PPPL, Princeton, New Jersey
- H. Yoneda
University of electro-communications, Tokyo
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Funding: Work performed under the auspices of the U. S. Dept. of Energy by LBNL, LLNL, and PPPL under Contracts No. W-7405-Eng-48, DE-AC02-05CH11231, and DE-AC02-76CH3073.
We describe near term heavy-ion beam-driven warm dense matter (WDM) experiments. Initial experiments are at low beam velocity, below the Bragg peak, increasing toward the Bragg peak in subsequent versions of the accelerator. The WDM conditions are envisioned to be achieved by combined longitudinal and transverse neutralized drift compression to provide a hot spot on the target with a beam spot size of about 1 mm, and pulse length about 1-2 ns. The range of the beams in solid matter targets is about 1 micron, which can be lengthened by using porous targets at reduced density. Initial candidate experiments include an experiment to study transient darkening in the WDM regime; and a thin target dE/dx experiment to study beam energy and charge state distribution in a heated target. Further experiments will explore target temperature and other properties such as electrical conductivity to investigate phase transitions and the critical point.
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Slides
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| WEOCC02 |
Overview of warm-dense-matter experiments with intense heavy ion beams at GSI-Darmstadt
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2038 |
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- P. N. Ni, F. M. Bieniosek, M. Leitner, B. G. Logan, R. More, P. K. Roy
LBNL, Berkeley, California
- J. J. Barnard
LLNL, Livermore, California
- A. Fernengel, A. Menzel
TU Darmstadt, Darmstadt
- A. Fertman, A. Golubev, B. Y. Sharkov, I. Turtikov
ITEP, Moscow
- D. Hoffmann, A. Hug, N. A. Tahir, A. Udrea, D. Varentsov
GSI, Darmstadt
- M. Kulish, D. Nikolaev, A. Ternovoy
IPCP, Chernogolovka, Moscow region
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Recently, a series of high energy density (HED) physics experiments with heavy ion beams have been carried out at the GSI heavy ion accelerator. The ion beam spot of heating uranium beam size of about 1 mm, pulse length about 120 ns and intensity 109 particles/bunch. In these experiments, metallic solid and porous targets of macroscopic volumes were heated by intense heavy ion beams uniformly and quasi-isochorically, and temperature, pressure and expansion velocity were measured during the heating and cooling of the sample using a fast multi-channel radiation pyrometer, laser Doppler interferometer (VISAR), Michelson displacement interferometer and streak-camera-based-backlighting system. In the performed experiments target temperatures varying from 1'000 K to 12'000 K and pressure in kbar range were measured. Expansion velocities up to 2600 m/s have been registered for lead and up to 1700 m/s for tungsten targets.
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Slides
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