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Title: Structured Photocathodes for Improved High-Energy X-Ray Efficiency in Streak Cameras

Abstract

We have designed and fabricated a structured streak camera photocathode to provide enhanced efficiency for high-energy X-rays. This gold coated photocathode was tested in a Streaked Polar Instrumentation for Diagnosing Energetic Radiation, and compared side by side against a conventional flat thin-film photocathode. Results show that the measured electron yield enhancement at energies ranging from 1 - 10 keV scale well with predictions, and that the total enhancement can be more than double. The spatial resolution of the streak camera does not show degradation in the structured region. We predict that the temporal resolution of the detector will also not be affected, as it is currently dominated by the slit size. This demonstration with Au motivates exploration of comparable enhancements with CsI, and may revolutionize X-ray streak camera photocathode design. The details of the photocathode design and performance testing will be presented.

Authors:
 [1];  [2];  [3];  [3];  [4];  [2];  [3];  [5];  [1];  [1];  [3];  [3];  [3];  [2]
  1. National Security Technologies, LLC. (NSTec), Mercury, NV (United States)
  2. Nanoshift
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. General Atomics
Publication Date:
Research Org.:
Nevada National Security Site/National Security Technologies, LLC (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1570379
Report Number(s):
DOE/NV/25946-2838
DOE Contract Number:  
DE-AC52-06NA25946
Resource Type:
Conference
Resource Relation:
Conference: Conference paper presented on 5/19/2016.
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Streak Cameras, Structured Photocathodes, high-energy x-ray

Citation Formats

Opachich, Y. P., Chen, N., Bell, P. M., Bradley, D. K., Feng, J., Gopal, A., Hatch, B., Hilsabeck, T. J., Huffman, E., Koch, J. A., Landen, O. L., MacPhee, A. G., Nagel, S. R., and Udin, S. Structured Photocathodes for Improved High-Energy X-Ray Efficiency in Streak Cameras. United States: N. p., 2016. Web. doi:10.1063/1.4961302.
Opachich, Y. P., Chen, N., Bell, P. M., Bradley, D. K., Feng, J., Gopal, A., Hatch, B., Hilsabeck, T. J., Huffman, E., Koch, J. A., Landen, O. L., MacPhee, A. G., Nagel, S. R., & Udin, S. Structured Photocathodes for Improved High-Energy X-Ray Efficiency in Streak Cameras. United States. doi:10.1063/1.4961302.
Opachich, Y. P., Chen, N., Bell, P. M., Bradley, D. K., Feng, J., Gopal, A., Hatch, B., Hilsabeck, T. J., Huffman, E., Koch, J. A., Landen, O. L., MacPhee, A. G., Nagel, S. R., and Udin, S. Thu . "Structured Photocathodes for Improved High-Energy X-Ray Efficiency in Streak Cameras". United States. doi:10.1063/1.4961302. https://www.osti.gov/servlets/purl/1570379.
@article{osti_1570379,
title = {Structured Photocathodes for Improved High-Energy X-Ray Efficiency in Streak Cameras},
author = {Opachich, Y. P. and Chen, N. and Bell, P. M. and Bradley, D. K. and Feng, J. and Gopal, A. and Hatch, B. and Hilsabeck, T. J. and Huffman, E. and Koch, J. A. and Landen, O. L. and MacPhee, A. G. and Nagel, S. R. and Udin, S.},
abstractNote = {We have designed and fabricated a structured streak camera photocathode to provide enhanced efficiency for high-energy X-rays. This gold coated photocathode was tested in a Streaked Polar Instrumentation for Diagnosing Energetic Radiation, and compared side by side against a conventional flat thin-film photocathode. Results show that the measured electron yield enhancement at energies ranging from 1 - 10 keV scale well with predictions, and that the total enhancement can be more than double. The spatial resolution of the streak camera does not show degradation in the structured region. We predict that the temporal resolution of the detector will also not be affected, as it is currently dominated by the slit size. This demonstration with Au motivates exploration of comparable enhancements with CsI, and may revolutionize X-ray streak camera photocathode design. The details of the photocathode design and performance testing will be presented.},
doi = {10.1063/1.4961302},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2016},
month = {5}
}

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