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Azimuthal spread of the avalanche in proportional counters

Conference ·
OSTI ID:6593761
; ; ;
The angular distribution of the avalanche around the anode wire is determined measuring the distribution of positive ions arriving on cathode strips surrounding the anode, for each single event. The width is typically 50/sup 0/ to 100/sup 0/ FWHM, in the proportional mode of operation; larger values are obtained at high gas gain. The angular distribution also depends on the anode wire diameter, the gas mixture and the space charge density in the avalanche. The factors determining the avalanche distribution around the wire and their importance for counter application, e.g., high rate behavior, signal formation and fast measurement of drift angle are discussed.
Research Organization:
Brookhaven National Lab., Upton, NY (USA)
DOE Contract Number:
EY-76-C-02-0016
OSTI ID:
6593761
Report Number(s):
BNL-24411; CONF-781033-1
Country of Publication:
United States
Language:
English

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Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ANGULAR DISTRIBUTION
ANODES
DISTRIBUTION
ELECTRIC DISCHARGES
ELECTRODES
MEASURING INSTRUMENTS
PROPORTIONAL COUNTERS
RADIATION DETECTORS
WIRES