Hohlraum glint and laser pre-pulse detector for NIF experiments using velocity interferometer system for any reflector

Laser pre-pulse and early-time laser reflection from the hohlraum wall onto the capsule (termed "glint") can cause capsule imprint and unwanted early-time shocks on indirect drive implosion experiments. In a minor modification to the existing velocity interferometer system for any reflecto...

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Bibliographic Details
Published in:Review of scientific instruments 2014-11, Vol.85 (11), p.11E608-11E608
Main Authors: Moody, J D, Clancy, T J, Frieders, G, Celliers, P M, Ralph, J, Turnbull, D P
Format: Article
Language:English
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Summary:Laser pre-pulse and early-time laser reflection from the hohlraum wall onto the capsule (termed "glint") can cause capsule imprint and unwanted early-time shocks on indirect drive implosion experiments. In a minor modification to the existing velocity interferometer system for any reflector diagnostic on NIF a fast-response vacuum photodiode was added to detect this light. The measurements show evidence of laser pre-pulse and possible light reflection off the hohlraum wall and onto the capsule.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4887155