Evaluation of long life (L/sup 2/) microchannel plates for x-ray photon counting

Conference · Mon Feb 01 04:00:00 EST 1988 · IEEE Trans. Nucl. Sci.; (United States)

OSTI ID:7198158

Fraser, G W; Pearson, J F; Lees, J E

The authors present an evaluation of Galileo Long-Life (L/sup 2/) microchannel plates (MCPs) operated in pulse counting mode. Modal gain, pulse height FWHM, gain uniformity and high count rate performance data are compared with measurements made with MCPs of conventional glass composition. Despite the absence of potassium (and hence, of the ..beta..-emitter /sup 40/K) from the L/sup 2/ glass, dark count rates for the L/sup 2/ MCPs are rather higher (times --5) than those of standard MCPs, due to the presence in the new glass of the radioisotope /sup 87/Rb. The manufacturer's key claim (made for the linear mode of plate operation), that the gain of L/sup 2/ MCPs falls much less rapidly than that of standard plates, is examined in the light of the results from a number of gain fatigue lifetests.

• Research Organization: X-ray Astronomy Group, Dept. of Physics, Univ. of Leicester, Leicester LE1 7RH (GB)
• OSTI ID: 7198158
• Report Number(s): CONF-871006-
• Conference Information: Journal Name: IEEE Trans. Nucl. Sci.; (United States) Journal Volume: 35:1
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPE AND RADIATION SOURCES
070204 -- Radiation Sources-- Industrial Uses
Radiometric
440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ALKALI METAL ISOTOPES
AMPLIFICATION
BETA DECAY RADIOISOTOPES
BETA SOURCES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
COUNTING TECHNIQUES
DETECTION
ELECTRON CAPTURE RADIOISOTOPES
ELECTRON MULTIPLIERS
ELECTRON TUBES
EVALUATION
GAIN
GLASS
ISOTOPES
LIGHT NUCLEI
MICROCHANNEL ELECTRON MULTIPLIERS
NUCLEI
ODD-ODD NUCLEI
PARTICLE SOURCES
PERFORMANCE TESTING
PHOTOELECTRON COUNTING
POTASSIUM 40
POTASSIUM ISOTOPES
RADIATION DETECTION
RADIATION SOURCES
RADIOISOTOPES
TESTING
X-RAY DETECTION
YEARS LIVING RADIOISOTOPES