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Title: Short pulse, high resolution, backlighters for point projection high-energy radiography at the National Ignition Facility

Journal Article · · Physics of Plasmas
DOI: https://doi.org/10.1063/1.4983137 · OSTI ID:1361877
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  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
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High-resolution, high-energy X-ray backlighters are very active area of research for radiography experiments at the National Ignition Facility (NIF) [Miller et al., Nucl. Fusion 44, S228 (2004)], in particular those aiming at obtaining Compton-scattering produced radiographs from the cold, dense fuel surrounding the hot spot. We report on experiments to generate and characterize point-projection-geometry backlighters using short pulses from the advanced radiographic capability (ARC) [Crane et al., J. Phys. 244, 032003 (2010); Di Nicola et al., Proc. SPIE 2015, 93450I-12], at the NIF, focused on Au micro-wires. We show the first hard X-ray radiographs, at photon energies exceeding 60 keV, of static objects obtained with 30 ps-long ARC laser pulses, and the measurements of strength of the X-ray emission, the pulse duration and the source size of the Au micro-wire backlighters. For the latter, a novel technique has been developed and successfully applied.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1361877
Alternate ID(s):
OSTI ID: 1374520; OSTI ID: 1421174
Report Number(s):
LLNL-JRNL-734514
Journal Information:
Physics of Plasmas, Vol. 24, Issue 5; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 41 works
Citation information provided by
Web of Science

References (12)

Development of a dual MCP framing camera for high energy x-rays journal November 2014
Development of Compton radiography of inertial confinement fusion implosions journal May 2011
Development of backlighting sources for a Compton radiography diagnostic of inertial confinement fusion targets (invited) journal October 2008
Image plates as x-ray detectors in plasma physics experiments journal October 2004
The use of a regular array of apertures in penumbral imaging journal December 1984
Investigating high speed phenomena in laser plasma interactions using dilation x-ray imager (invited) journal November 2014
Calculation of X-ray bremsstrahlung and characteristic line emission produced by a Maxwellian electron distribution journal May 1982
High-energy (>70 keV) x-ray conversion efficiency measurement on the ARC laser at the National Ignition Facility journal March 2017
The commissioning of the advanced radiographic capability laser system: experimental and modeling results at the main laser output conference February 2015
Target Development for the National Ignition Campaign journal February 2016
Progress on converting a NIF quad to eight, petawatt beams for advanced radiography journal August 2010
The National Ignition Facility: enabling fusion ignition for the 21st century journal November 2004

Cited By (8)

Betatron x-ray radiation from laser-plasma accelerators driven by femtosecond and picosecond laser systems journal May 2018
Characterization of fast electron divergence and energy spectrum from modeling of angularly resolved bremsstrahlung measurements journal December 2018
Development of broadband x-ray radiography for diagnosing magnetically driven cylindrically compressed matter journal August 2019
Bremsstrahlung hard x-ray source driven by an electron beam from a self-modulated laser wakefield accelerator journal March 2018
Betatron x-ray radiation in the self-modulated laser wakefield acceleration regime: prospects for a novel probe at large scale laser facilities journal December 2018
Progress of indirect drive inertial confinement fusion in the United States journal July 2019
X-ray penumbral imaging diagnostic developments at the National Ignition Facility
  • Felker, Sean J.; Bachmann, Benjamin; Abu Shawareb, Hatim
  • Target Diagnostics Physics and Engineering for Inertial Confinement Fusion VI https://doi.org/10.1117/12.2274611
conference September 2017
Injection laser system for Advanced Radiographic Capability using chirped pulse amplification on the National Ignition Facility journal January 2019

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