skip to main content

DOE PAGESDOE PAGES

Title: A novel platform to study magnetized high-velocity collisionless shocks

An experimental platform to study the interaction of two colliding high-velocity (0.01–0.2c; 0.05–20 MeV) proton plasmas in a high strength (20 T) magnetic field is introduced. This platform aims to study the collision of magnetized plasmas accelerated via the Target-Normal-Sheath-Acceleration mechanism and initially separated by distances of a few hundred microns. The plasmas are accelerated from solid targets positioned inside a few cubic millimeter cavity located within a Helmholtz coil that provides up to 20 T magnetic fields. Various parameters of the plasmas at their interaction location are estimated. These show an interaction that is highly non-collisional, and that becomes more and more dominated by the magnetic fields as time progresses (from 5 to 60 ps). Particle-in-cell simulations are used to reproduce the initial acceleration of the plasma both via simulations including the laser interaction and via simulations that start with preheated electrons (to save dramatically on computational expense). The benchmarking of such simulations with the experiment and with each other will be used to understand the physical interaction when a magnetic field is applied. In conclusion, the experimental density profile of the interacting plasmas is shown in the case without an applied magnetic magnetic field, so to show thatmore » without an applied field that the development of high-velocity shocks, as a result of particle-to-particle collisions, is not achievable in the configuration considered.« less
Authors:
 [1] ;  [2] ;  [3] ;  [1] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [4] ;  [1]
  1. Ecole Polytechnique Univ., Palaiseau (France)
  2. Univ. of Bordeaux, Talence (France); National Research Nuclear University (MEPhI), Moscow (Russia)
  3. Le Laboratoire National des Champs Magnetiques Intenses (LNCMI), Toulouse (France)
  4. Univ. of Bordeaux, Talence (France)
  5. Inst. national de la recherche scientifique (INRS), QC (Canada). Energie, Materiaux et Telecommunications (EMT)
  6. National Research Nuclear University (MEPhI), Moscow (Russia); Russian Academy of Sciences (RAS), Moscow (Russian Federation). Joint Inst.for High Temperatures
  7. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  8. Ecole Polytechnique Univ., Palaiseau (France); Alternative Energies and Atomic Energy Commission (CEA), Arpajon (France)
Publication Date:
OSTI Identifier:
1262175
Report Number(s):
LLNL-JRNL--686314
Journal ID: ISSN 1574-1818
Grant/Contract Number:
AC52-07NA27344; 12-BS09-025-01; 2014-056129
Type:
Accepted Manuscript
Journal Name:
High Energy Density Physics
Additional Journal Information:
Journal Volume: 17; Journal Issue: PA; Journal ID: ISSN 1574-1818
Publisher:
Elsevier
Research Org:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY Astrophysical collisionless shocks; Magnetized plasmas; High-velocity-shocks