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Proceedings Paper

Performance and operational upgrades of x-ray streak camera photocathode assemblies at NIF
Author(s): Ben Hatch; Nathan Palmer; Shannon Ayers; Don Browning; Brian Felker; Joe Holder; Doug Homoelle; Shahab Khan; Joe Kimbrough; Andrew MacPhee; Robert B. Petre; Brad Perfect; Alan Throop; J. Nan Wong
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Paper Abstract

X-ray streak cameras are used at the National Ignition Facility for time-resolved measurements of inertial confinement fusion metrics such as capsule implosion velocity, self-emission burn width, and x-ray bang time (time of brightest x-ray emission). Recently a design effort was undertaken to improve the performance and operation of the streak camera photocathode and related assemblies. The performance improvements include a new optical design for the input of UV timing fiducial pulses that increases collection efficiency of electrons off the photocathode, repeatability and precision of the photocathode pack assembly, and increase the input field of view for upcoming experiments. The operational improvements will provide the ability to replace photocathode packs between experiments in the field without removing the diagnostic from the Diagnostic Instrument Manipulator (DIM). The new design and preliminary results are presented.

Paper Details

Date Published: 10 September 2014
PDF: 10 pages
Proc. SPIE 9211, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion III, 92110H (10 September 2014); doi: 10.1117/12.2064042
Show Author Affiliations
Ben Hatch, Lawrence Livermore National Lab. (United States)
Nathan Palmer, Lawrence Livermore National Lab. (United States)
Shannon Ayers, Lawrence Livermore National Lab. (United States)
Don Browning, Lawrence Livermore National Lab. (United States)
Brian Felker, Lawrence Livermore National Lab. (United States)
Joe Holder, Lawrence Livermore National Lab. (United States)
Doug Homoelle, Lawrence Livermore National Lab. (United States)
Shahab Khan, Lawrence Livermore National Lab. (United States)
Joe Kimbrough, Lawrence Livermore National Lab. (United States)
Andrew MacPhee, Lawrence Livermore National Lab. (United States)
Robert B. Petre, Lawrence Livermore National Lab. (United States)
Brad Perfect, Lawrence Livermore National Lab. (United States)
Alan Throop, Lawrence Livermore National Lab. (United States)
J. Nan Wong, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 9211:
Target Diagnostics Physics and Engineering for Inertial Confinement Fusion III
Perry M. Bell; Gary P. Grim, Editor(s)

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