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Title: High-energy (> 70 KeV) x-ray conversion efficiency measurement on the ARC laser at the National Ignition Facility

Journal Article · · Physics of Plasmas
DOI: https://doi.org/10.1063/1.4978493 · OSTI ID:1347667
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  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
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Here, the Advanced Radiographic Capability (ARC) laser system at the National Ignition Facility (NIF) is designed to ultimately provide eight beamlets with a pulse duration adjustable from 1 to 30 ps, and energies up to 1.5 kJ per beamlet. Currently, four beamlets have been commissioned. In the first set of 6 commissioning target experiments, the individual beamlets were fired onto gold foil targets with energy up to 1 kJ per beamlet at 20–30 ps pulse length. The x-ray energy distribution and pulse duration were measured, yielding energy conversion efficiencies of 4–9 × 10–4 for x-rays with energies greater than 70 keV. With greater than 3 J of such x-rays, ARC provides a high-precision x-ray backlighting capability for upcoming inertial confinement fusion and high-energy-density physics experiments on NIF.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1347667
Alternate ID(s):
OSTI ID: 1349380
Report Number(s):
LLNL-JRNL-706562; TRN: US1700603
Journal Information:
Physics of Plasmas, Vol. 24, Issue 3; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (21)

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Front Matter: Volume 9345 conference April 2015
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Effects of electron recirculation on a hard x-ray source observed during the interaction of a high intensity laser pulse with thin Au targets journal December 2013
Measuring x-ray burn history with the Streaked Polar Instrumentation for Diagnosing Energetic Radiation (SPIDER) at the National Ignition Facility (NIF) conference October 2012
Effect of plasma density scale length on the properties of bremsstrahlung x-ray sources created by picosecond laser pulses journal January 2009
Measuring ultrashort laser pulses in the time-frequency domain using frequency-resolved optical gating journal September 1997
Performance measurements of the injection laser system configured for picosecond scale advanced radiographic capability journal August 2010
Progress on converting a NIF quad to eight, petawatt beams for advanced radiography journal August 2010

Cited By (13)

Short pulse, high resolution, backlighters for point projection high-energy radiography at the National Ignition Facility journal May 2017
A fused silica Cherenkov radiator for high precision time-of-flight measurement of DT γ and neutron spectra (invited) journal October 2018
Implementing time resolved electron temperature capability at the NIF using a streak camera journal October 2018
Calibration of proton dispersion for the NIF electron positron proton spectrometer (NEPPS) for short-pulse laser experiments on the NIF ARC journal October 2018
Ab initio response functions for Cherenkov-based neutron detectors journal October 2018
First demonstration of ARC-accelerated proton beams at the National Ignition Facility journal April 2019
Experimental study of energy transfer in double shell implosions journal May 2019
Enhanced electron acceleration in aligned nanowire arrays irradiated at highly relativistic intensities journal November 2019
From ICF to laboratory astrophysics: ablative and classical Rayleigh–Taylor instability experiments in turbulent-like regimes journal December 2018
Status of NIF laser and high power laser research at LLNL conference February 2017
Injection laser system for Advanced Radiographic Capability using chirped pulse amplification on the National Ignition Facility journal January 2019
Enhanced laser–plasma interactions using non-imaging optical concentrator targets journal January 2020
Studies of the Core Conditions of the Earth and Super-Earths Using Intense Ion Beams at FAIR journal August 2017

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