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

Journal Article · Sat Nov 15 00:00:00 EST 2014 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4893942· OSTI ID:22303692

Ross, P. W.; Huffman, E.; Koch, J. A. ^[1]; MacPhee, A. G.; Nagel, S. R.; Bell, P. M.; Bradley, D. K.; Landen, O. L. ^[2]; Hilsabeck, T. J. ^[3]

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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)

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.

• OSTI ID: 22303692
• Journal Information: Review of Scientific Instruments, Vol. 85, Issue 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

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