Performance and operational upgrades of x-ray streak camera photocathode assemblies at NIF

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

doi:10.1117/12.2064042

10 September 2014 Performance and operational upgrades of x-ray streak camera photocathode assemblies at NIF

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

Author Affiliations +

Proceedings Volume 9211, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion III; 92110H (2014) https://doi.org/10.1117/12.2064042
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

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.

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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, and J. Nan Wong "Performance and operational upgrades of x-ray streak camera photocathode assemblies at NIF", Proc. SPIE 9211, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion III, 92110H (10 September 2014); https://doi.org/10.1117/12.2064042

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