Comparative lifetesting results for microchannel plates in windowless EUV photon detectors

Conference · Wed Feb 01 04:00:00 EST 1984 · IEEE Trans. Nucl. Sci.; (United States)

OSTI ID:6968353

Malina, R F; Cobum, K R

Microchannel plates (MCP's) from seven manufacturers were subjected to a series of tests to determine their suitability for the Extreme Ultraviolet Explorer satellite. Comparative data are presented for sixteen MCP tandem pairs with channel length to diameter ratios (l/d's) ranging from 40:1 to 60:1 and for two saturable (curved channel) MCP's with l/d's of 80:1. Results for MCP's with funnelled channel throats are also discussed. Properties of the MCP's which were monitored include: background count rate, output charge pulse height distribution (PHD), modal gain, PHD full width half maximum (FWHM), and extreme ultraviolet (EUV) photon quantum efficiency. Five detectors were chosen for further lifetime testing consisting of a mild bake to 100/sup 0/C, and charge extraction to 10/sup -2/ coulombs, repeated high voltage cycling and reexposure to one atmosphere conditions. The results of these tests and their implications for the flight detectors are discussed. Erratic events in the detector background were recorded, probably due to field emission from high voltage surfaces or the absorption of water vapor into the electrode following exposure to air. The steps taken to control the detector background are discussed.

• Research Organization: Space Sciences Lab., Univ. of California, Berkeley, CA 94720
• OSTI ID: 6968353
• Report Number(s): CONF-831015-
• Conference Information: Journal Name: IEEE Trans. Nucl. Sci.; (United States) Journal Volume: 31:1
• Country of Publication: United States
• Language: English

Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
AMPLIFICATION
AMPLITUDES
BACKGROUND RADIATION
COMPARATIVE EVALUATIONS
COUNTING RATES
DETECTION
EFFICIENCY
ELECTROMAGNETIC PULSES
ELECTROMAGNETIC RADIATION
ELECTRON MULTIPLIERS
ELECTRON TUBES
FAR ULTRAVIOLET RADIATION
GAIN
GAMMA DETECTION
MATERIALS TESTING
MEASURING INSTRUMENTS
MICROCHANNEL ELECTRON MULTIPLIERS
NONDESTRUCTIVE TESTING
PERFORMANCE TESTING
PULSES
QUANTUM EFFICIENCY
RADIATION DETECTION
RADIATION DETECTORS
RADIATIONS
SATELLITES
SERVICE LIFE
SYSTEMS ANALYSIS
TESTING
THERMAL TESTING
ULTRAVIOLET RADIATION
X-RAY DETECTION