Monte Carlo simulations of microchannel plate detectors. I. Steady-state voltage bias results

X-ray detectors based on straight-channel microchannel plates (MCPs) are a powerful diagnostic tool for two-dimensional, time-resolved imaging and time-resolved x-ray spectroscopy in the fields of laser-driven inertial confinement fusion and fast Z-pinch experiments. Understanding the behavior of mi...

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Bibliographic Details
Published in:Review of scientific instruments 2008-07, Vol.79 (7), p.073104-073104-7
Main Authors: Wu, Ming, Kruschwitz, Craig A., Morgan, Dane V., Morgan, Jiaming
Format: Article
Language:English
Subjects:
COMPUTER CODES
COMPUTERIZED SIMULATION
ELECTRIC POTENTIAL
HIGH ENERGY PHYSICS
INERTIAL CONFINEMENT
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
MICROCHANNEL ELECTRON MULTIPLIERS
MONTE CARLO METHOD
POSITION SENSITIVE DETECTORS
SPATIAL RESOLUTION
STEADY-STATE CONDITIONS
TIME RESOLUTION
TWO-DIMENSIONAL CALCULATIONS
X RADIATION
X-RAY DETECTION
X-RAY SPECTROSCOPY
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Summary:X-ray detectors based on straight-channel microchannel plates (MCPs) are a powerful diagnostic tool for two-dimensional, time-resolved imaging and time-resolved x-ray spectroscopy in the fields of laser-driven inertial confinement fusion and fast Z-pinch experiments. Understanding the behavior of microchannel plates as used in such detectors is critical to understanding the data obtained. The subject of this paper is a Monte Carlo computer code we have developed to simulate the electron cascade in a MCP under a static applied voltage. Also included in the simulation is elastic reflection of low-energy electrons from the channel wall, which is important at lower voltages. When model results were compared to measured MCP sensitivities, good agreement was found. Spatial resolution simulations of MCP-based detectors were also presented and found to agree with experimental measurements.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.2949119