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Title: Evaluation of a digital optical ionizing radiation particle track detector

An ionizing radiation particle track detector is outlined which can, in principle, determine the three-dimensional spatial distribution of all the secondary electrons produced by the passage of ionizing radiation through a low-pressure (0.1 to 10 kPa) gas. The electrons in the particle track are excited by the presence of a high-frequency AC electric field, and two digital cameras image the optical radiation produced in electronic excitation collisions of the surroundings gas by the electrons. The specific requirements of the detector for neutron dosimetry and microdosimetry are outlined (i.e., operating conditions of the digital cameras, high voltage fields, gas mixtures, etc.) along with an estimate of the resolution and sensitivity achievable with this technique. The proposed detector is shown to compare favorable with other methods for obtaining the details of the track structure, particularly in the quality of the information obtainable about the particle track and the comparative simplicity and adaptability of the detector for measuring the secondary electron track structure for many forms of ionizing radiation over a wide range of energies.
Authors:
Publication Date:
OSTI Identifier:
6223499
Report Number(s):
ORNL/TM-10421
ON: DE87010582
DOE Contract Number:
AC05-84OR21400
Resource Type:
Technical Report
Research Org:
Oak Ridge National Lab., TN (USA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; GAS SCINTILLATION DETECTORS; DESIGN; NEUTRON DOSIMETRY; DIGITAL SYSTEMS; ELECTRIC FIELDS; IONIZING RADIATIONS; LET; SECONDARY EMISSION; DOSIMETRY; EMISSION; ENERGY TRANSFER; MEASURING INSTRUMENTS; RADIATION DETECTORS; RADIATIONS; SCINTILLATION COUNTERS 440102* -- Radiation Instrumentation-- Radiation Dosemeters