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Proceedings Paper

Optimizing the input and output transmission lines that gate the microchannel plate in a high-speed framing camera
Author(s): John B. Lugten; Charles G. Brown; Kenneth W. Piston; Bart V. Beeman; Fred V. Allen; Dustin T. Boyle; Christopher G. Brown; Jason G. Cruz; Douglas R. Kittle; Alexander A. Lumbard; Peter Torres; Dana R. Hargrove; Laura Robin Benedetti; Perry M. Bell
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Paper Abstract

We present new designs for the launch and receiver boards used in a high speed x-ray framing camera at the National Ignition Facility. The new launch board uses a Klopfenstein taper to match the 50 ohm input impedance to the ~10 ohm microchannel plate. The new receiver board incorporates design changes resulting in an output monitor pulse shape that more accurately represents the pulse shape at the input and across the microchannel plate; this is valuable for assessing and monitoring the electrical performance of the assembled framing camera head. The launch and receiver boards maximize power coupling to the microchannel plate, minimize cross talk between channels, and minimize reflections. We discuss some of the design tradeoffs we explored, and present modeling results and measured performance. We also present our methods for dealing with the non-ideal behavior of coupling capacitors and terminating resistors. We compare the performance of these new designs to that of some earlier designs.

Paper Details

Date Published: 31 August 2015
PDF: 11 pages
Proc. SPIE 9591, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion IV, 95910L (31 August 2015); doi: 10.1117/12.2189139
Show Author Affiliations
John B. Lugten, Lawrence Livermore National Lab. (United States)
Charles G. Brown, Lawrence Livermore National Lab. (United States)
Kenneth W. Piston, Lawrence Livermore National Lab (United States)
Bart V. Beeman, Lawrence Livermore National Lab. (United States)
Fred V. Allen, Lawrence Livermore National Lab. (United States)
Dustin T. Boyle, Lawrence Livermore National Lab. (United States)
Christopher G. Brown, National Security Technologies, LLC (United States)
Jason G. Cruz, Lawrence Livermore National Lab. (United States)
Douglas R. Kittle, Lawrence Livermore National Lab. (United States)
Alexander A. Lumbard, Lawrence Livermore National Lab. (United States)
Peter Torres, National Security Technologies, LLC (United States)
Dana R. Hargrove, Lawrence Livermore National Lab. (United States)
Laura Robin Benedetti, Lawrence Livermore National Lab. (United States)
Perry M. Bell, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 9591:
Target Diagnostics Physics and Engineering for Inertial Confinement Fusion IV
Jeffrey A. Koch; Gary P. Grim, Editor(s)

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