skip to main content

Title: Collisional effects on Rayleigh-Taylor-induced magnetic fields

Magnetic-field generation from the Rayleigh-Taylor (RT) instability was predicted more than 30 years ago, though experimental measurements of this phenomenon have only occurred in the past few years. These pioneering observations demonstrated that collisional effects are important to B-field evolution. To produce fields of a measurable strength, high-intensity lasers irradiate solid targets to generate the nonaligned temperature and density gradients required for B-field generation. The ablation process naturally generates an unstable system where RT-induced magnetic fields form. Field strengths inferred from monoenergetic-proton radiographs indicate that in the ablation region diffusive effects caused by finite plasma resistivity are not negligible. Results from the first proof-of-existence experiments are reviewed and the role of collisional effects on B-field evolution is discussed in detail.
Authors:
 [1] ; ;  [2] ; ; ; ; ;  [3] ; ; ; ; ;  [4]
  1. University of Michigan, Ann Arbor, Michigan 48109 (United States)
  2. Florida State University, Tallahassee, Florida 32306 (United States)
  3. Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
  4. Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 (United States)
Publication Date:
OSTI Identifier:
22410401
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ABLATION; COLLISIONS; LASER RADIATION; LASER TARGETS; MAGNETIC FIELDS; PLASMA; PROTON RADIOGRAPHY; RAYLEIGH-TAYLOR INSTABILITY