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Experiments to explore the influence of pulse shaping at the National Ignition Facility

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/5.0019193· OSTI ID:1711433
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  1. Univ. of Rochester, NY (United States); Laboratory for Laser Energetics, University of Rochester
  2. Univ. of Rochester, NY (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
+ Show Author Affiliations

The shaping of the drive pulse in time is a key tool in the design of fusion experiments that use inertia to confine burning plasmas. Here, it is directly related to the adiabat and compressibility of the DT fuel, and the characteristics of the laser and target that are needed to ignite. With this in mind, we have performed experiments at the National Ignition Facility that test small changes in the shape of the pulse. In contrast to theory, we find implosions at lower adiabats can have reduced yield and areal density. We discuss implications to performance and the mechanism(s) that could be responsible.

Research Organization:
Univ. of Rochester, NY (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Contributing Organization:
Laboratory for Laser Energetics, University of Rochester
Grant/Contract Number:
NA0003856; AC52-07NA27344
OSTI ID:
1711433
Alternate ID(s):
OSTI ID: 1708926
Report Number(s):
2020-93, 1594, 2549; 2020-93, 1594, 2549
Journal Information:
Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 11 Vol. 27; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Fusion experiments
Plasma confinement