Time response of fast-gated microchannel plates used as x-ray detectors

Conference · Mon Nov 05 04:00:00 EST 1990

OSTI ID:6277140

Turner, R E; Bell, P; Hanks, R; Kilkenny, J D; Landen, N; Power, G; Wiedwald, J; Meier, M

We report measurements of the time response of fast-gated, micro- channel plate (MCP) detectors, using a <10 ps pulsewidth ultra-violet laser and an electronic sampling system to measure time resolutions to better than 25 ps. The results show that framing times of less than 100 ps are attainable with high gain. The data is compared to a Monte Carlo calculation, which shows good agreement. We also measured the relative sensitivity as a function of DC bias, and saturation effects for large signal inputs. In part B, we briefly describe an electrical time-of-flight'' technique, which we have used to measure the response time of a fast-gated microchannel plate (MCP). Thinner MCP's than previously used have been tested, and, as expected, show fast gating times and smaller electron multiplication. A preliminary design for an x-ray pinhole camera, using a thin MCP, is presented. 7 refs., 6 figs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6277140
• Report Number(s): UCRL-JC-105315; CONF-9011127--11; ON: DE91006243
• Country of Publication: United States
• Language: English

Related Subjects

440600* -- Optical Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
COMPUTERIZED SIMULATION
DETECTION
DYE LASERS
ELECTRON MULTIPLIERS
ELECTRON TUBES
LASERS
LIQUID LASERS
MICROCHANNEL ELECTRON MULTIPLIERS
MONTE CARLO METHOD
RADIATION DETECTION
RESOLUTION
SIMULATION
TIME RESOLUTION
TIME-OF-FLIGHT METHOD
TIMING PROPERTIES
X-RAY DETECTION