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Seeding the Electrothermal Instability through a Three-Dimensional, Nonlinear Perturbation

Journal Article · · Physical Review Letters
 [1];  [1];  [1];  [1];  [2];  [3];  [4];  [5];  [6];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
  3. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
  4. Univ. of New Mexico, Albuquerque, NM (United States)
  5. Univ. of Nevada, Reno, NV (United States)
  6. General Atomics, San Diego, CA (United States)
Electrothermal instability plays an important role in applications of current-driven metal, creating striations (which seed the magneto–Rayleigh-Taylor instability) and filaments (which provide a more rapid path to plasma formation). However, the initial formation of both structures is not well understood. Here, simulations show for the first time how a commonly occurring isolated defect transforms into the larger striation and filament, through a feedback loop connecting current and electrical conductivity. Simulations have been experimentally validated using defect-driven self-emission patterns.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344; NA0003525
OSTI ID:
2008175
Alternate ID(s):
OSTI ID: 2311433
OSTI ID: 2311641
Report Number(s):
LLNL--JRNL-831407; SAND--2023-05781J; SAND--2023-06015J; 1043407
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 130; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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