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Title: Spatio-temporal focal spot characterization and modeling of the NIF ARC kilojoule picosecond laser

Journal Article · · Applied Optics
DOI:https://doi.org/10.1364/ao.416846· OSTI ID:1781395
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  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Fraunhofer Institute for Laser Technology (ILT), Aachen (Germany)
  4. Goleta, CA (United States)
+ Show Author Affiliations

The advanced radiographic capability (ARC) laser system, part of theNational Ignition Facility (NIF) at Lawrence Livermore National Laboratory, is a short-pulse laser capability integrated into the NIF. The ARC is designed to provide adjustable pulse lengths of ~1–38 ps in four independent beamlets, each with energies up to 1 kJ (depending on pulse duration). A detailed model of the ARC lasers has been developed that predicts the time- and space-resolved focal spots on target for each shot. Measurements made to characterize static and dynamic wavefront characteristics of the ARC are important inputs to the code. Modeling has been validated with measurements of the time-integrated focal spot at the target chamber center (TCC) at low power, and the space-integrated pulse duration at high power, using currently available diagnostics. In this work, these simulations indicate that each of the four ARC beamlets achieves a peak intensity on target of up to a few 1018 W=cm2.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-76SF00515; AC52-07NA27344
OSTI ID:
1781395
Alternate ID(s):
OSTI ID: 1769545; OSTI ID: 1874102
Report Number(s):
LLNL-JRNL-771295; TRN: US2209911
Journal Information:
Applied Optics, Vol. 60, Issue 8; ISSN 1559-128X
Publisher:
Optical Society of AmericaCopyright Statement
Country of Publication:
United States
Language:
English

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