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Experimental Validation of Low- Z Ion-Stopping Formalisms around the Bragg Peak in High-Energy-Density Plasmas

Journal Article · · Physical Review Letters
 [1];  [2];  [3];  [4];  [5];  [6];  [1];  [7];  [1];  [1];  [1];  [1];  [6];  [6]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. Univ. de Las Palmas de Gran Canaria, Las Palmas de Gran Canaria (Spain)
  3. Univ. of Nevada, Reno, NV (United States)
  4. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  5. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  6. Univ. of Rochester, Rochester, NY (United States)
  7. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Here, we report on the first accurate validation of low-$$Z$$ ion-stopping formalisms in the regime ranging from low-velocity ion stopping—through the Bragg peak—to high-velocity ion stopping in well-characterized high-energy-density plasmas. These measurements were executed at electron temperatures and number densities in the range of 1.4–2.8 keV and 4 × 1023 –8 × 1023 cm–3, respectively. For these conditions, it is experimentally demonstrated that the Brown-Preston-Singleton formalism provides a better description of the ion stopping than other formalisms around the Bragg peak, except for the ion stopping at vi ~0.3vth, where the Brown-Preston-Singleton formalism significantly underpredicts the observation. It is postulated that the inclusion of nuclear-elastic scattering, and possibly coupled modes of the plasma ions, in the modeling of the ion-ion interaction may explain the discrepancy of ~20% at this velocity, which would have an impact on our understanding of the alpha energy deposition and heating of the fuel ions, and thus reduce the ignition threshold in an ignition experiment.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1542701
Alternate ID(s):
OSTI ID: 1559506
Report Number(s):
LLNL-JRNL--756658; 943886
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 1 Vol. 122; ISSN 0031-9007; ISSN PRLTAO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (7)

Effects of Coulomb coupling on stopping power and a link to macroscopic transport journal August 2019
On alpha-particle transport in inertial fusion journal June 2019
Modified parameterization of the Li-Petrasso charged-particle stopping power theory journal December 2019
Exploring the crossover between high-energy-density plasma and ultracold neutral plasma physics journal October 2019
Transverse force induced by a magnetized wake journal October 2019
Nuclear diagnostics for Inertial Confinement Fusion (ICF) plasmas journal January 2020
Neutron Time-of-Flight Measurements of Charged-Particle Energy Loss in Inertial Confinement Fusion Plasmas journal October 2019

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