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Proceedings Paper

Measurement of cathode luminescence efficiency of phosphors for micro-channel plate based x-ray framing cameras
Author(s): N. Izumi; J. Emig; J. Moody; C. Middeleton; J. Holder; S. Glenn; T. Pond; R. Shellman; M. Cardenas; P. J. Walsh; S. J. Chelli; D. K. Bradley; P. M. Bell
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Paper Abstract

From a point of a signal-to-background ratio, phosphors are a key component of micro channel plate (MCP) based x-ray framing cameras. In an MCP based framing camera, x-ray signal is converted to electrons, gated, amplified, and converted back to optical signal on the phosphor. To operate x-ray framing cameras in a harsh neutron induced radiation background of the National Ignition Facility, cathodeluminescence efficiency of the phosphor is very important. To avoid MCP damage due to high voltage breakdown, we have been operating phosphors below 3kV (acceleration field < 6 kV/mm). The signal-to-background ratio the camera can be significantly improved by increasing the phosphor potential to 10kV. We measured conversion efficiencies of standard phosphors at electron energies of 0.5 ~10 keV and assessed achievable performance of them with using a numerical model.

Paper Details

Date Published: 15 October 2012
PDF: 6 pages
Proc. SPIE 8505, Target Diagnostics Physics and Engineering for Inertial Confinement Fusion, 85050I (15 October 2012); doi: 10.1117/12.930992
Show Author Affiliations
N. Izumi, Lawrence Livermore National Lab. (United States)
J. Emig, Lawrence Livermore National Lab. (United States)
J. Moody, Lawrence Livermore National Lab. (United States)
C. Middeleton, Lawrence Livermore National Lab. (United States)
J. Holder, Lawrence Livermore National Lab. (United States)
S. Glenn, Lawrence Livermore National Lab. (United States)
T. Pond, National Security Technologies, LLC (United States)
R. Shellman, National Security Technologies, LLC (United States)
M. Cardenas, National Security Technologies, LLC (United States)
P. J. Walsh, Los Alamos National Lab. (United States)
S. J. Chelli, Deposition Research Lab., Inc. (United States)
D. K. Bradley, Lawrence Livermore National Lab. (United States)
P. M. Bell, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 8505:
Target Diagnostics Physics and Engineering for Inertial Confinement Fusion
Perry Bell; Gary P. Grim, Editor(s)

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