Measurement of charged-particle stopping in warm-dense plasma
Journal Article
·
· Physical Review Letters
- MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States)
- Univ. of California Irvine, Irvine, CA (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- General Atomics, San Diego, CA (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Univ. of Rochester, NY (United States)
- Univ. of Michigan, Ann Arbor, MI (United States)
We measured the stopping of energetic protons in an isochorically-heated solid-density Be plasma with an electron temperature of ~32 eV, corresponding to moderately-coupled [(e²/a/(kBTe + EF ) ~ 0.3] and moderately-degenerate [kBTe/EF ~2] 'warm dense matter' (WDM) conditions. We present the first high-accuracy measurements of charged-particle energy loss through dense plasma, which shows an increased loss relative to cold matter, consistent with a reduced mean ionization potential. The data agree with stopping models based on an ad-hoc treatment of free and bound electrons, as well as the average-atom local-density approximation; this work is the first test of these theories in WDM plasma.
- Research Organization:
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- NA0001857; NA0002035; FC52-08NA28752; B597367; 415935- G
- OSTI ID:
- 1183038
- Alternate ID(s):
- OSTI ID: 1183226
- Journal Information:
- Physical Review Letters, Vol. 114, Issue 21; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 106 works
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