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Title: Alternating current long range alpha particle detector

An alpha particle detector, utilizing alternating currents, which is capable of detecting alpha particles from distinct sources. The use of alternating currents allows use of simpler ac circuits which, in turn, are not susceptible to dc error components. It also allows the benefit of gas gain, if desired. In the invention, a voltage source creates an electric field between two conductive grids, and between the grids and a conductive enclosure. Air containing air ions created by collision with alpha particles is drawn into the enclosure and detected. In some embodiments, the air flow into the enclosure is interrupted, creating an alternating flow of ions. In another embodiment, a modulated voltage is applied to the grid, also modulating the detection of ions.
Authors:
;
Publication Date:
OSTI Identifier:
6289389
Report Number(s):
US 5187370; A
PPN: US 7-799464
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Patent
Resource Relation:
Patent File Date: 27 Nov 1991
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ALPHA DETECTION; RADIATION DETECTORS; DESIGN; AC SYSTEMS; AIR FLOW; ELECTRIC CONDUCTORS; ELECTRIC CURRENTS; ELECTRIC FIELDS; ERRORS; IONIZATION; CHARGED PARTICLE DETECTION; CURRENTS; DETECTION; ENERGY SYSTEMS; FLUID FLOW; GAS FLOW; MEASURING INSTRUMENTS; POWER SYSTEMS; RADIATION DETECTION 440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments