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Title: Ionization chamber

An ionization chamber has separate drift and detection regions electrically isolated from each other by a fine wire grid. A relatively weak electric field can be maintained in the drift region when the grid and another electrode in the chamber are connected to a high voltage source. A much stronger electric field can be provided in the detection region by connecting wire electrodes therein to another high voltage source. The detection region can thus be operated in a proportional mode when a suitable gas is contained in the chamber. High resolution output pulse waveforms are provided across a resistor connected to the detection region anode, after ionizing radiation enters the drift region and ionize the gas.
Authors:
 [1]
  1. (Port Jefferson Station, NY)
Publication Date:
OSTI Identifier:
863872
Report Number(s):
US 4264816
DOE Contract Number:
EY-76-C-02-0016
Resource Type:
Patent
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY
Country of Publication:
United States
Language:
English
Subject:
ionization; chamber; ionization; chamber; separate; drift; detection; regions; electrically; isolated; fine; wire; grid; relatively; weak; electric; field; maintained; drift; region; grid; electrode; chamber; connected; voltage; source; stronger; electric; field; provided; detection; region; connecting; wire; electrodes; therein; voltage; source; detection; region; operated; proportional; mode; suitable; gas; contained; chamber; resolution; output; pulse; waveforms; provided; resistor; connected; detection; region; anode; ionizing; radiation; enters; drift; region; ionize; gas; electrically isolated; voltage source; voltage source; output pulse; electric field; electric field; ionizing radiation; ionization chamber; ionization chamber; relatively weak; suitable gas; wire grid; electrically isolate; fine wire; pulse waveforms; pulse waveform /250/313/