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Title: High quantum efficiency photocathode simulation for the investigation of novel structured designs

A computer model in CST Studio Suite has been developed to evaluate several novel geometrically enhanced photocathode designs. This work was aimed at identifying a structure that would increase the total electron yield by a factor of two or greater in the 1–30 keV range. The modeling software was used to simulate the electric field and generate particle tracking for several potential structures. The final photocathode structure has been tailored to meet a set of detector performance requirements, namely, a spatial resolution of <40 μm and a temporal spread of 1–10 ps. We present the details of the geometrically enhanced photocathode model and resulting static field and electron emission characteristics.
Authors:
; ; ;  [1] ; ; ; ; ;  [2] ;  [3]
  1. National Security Technologies LLC, Livermore, California 94550 (United States)
  2. Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)
  3. General Atomics, San Diego, California 92121 (United States)
Publication Date:
OSTI Identifier:
22303692
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; COMPUTER CODES; COMPUTERIZED SIMULATION; DESIGN; ELECTRIC FIELDS; ELECTRON EMISSION; KEV RANGE; PERFORMANCE; PHOTOCATHODES; QUANTUM EFFICIENCY; SPATIAL RESOLUTION