Pulsed helium ionization detection system
A pulsed helium ionization detection system is described comprising: an ionization detection chamber including anode and cathode electrodes between which helium carrier gas containing an ionizable component to be detected is introduced and an ionizing radiation source disposed within the chamber for ionizing only the component to be detected; ionization current sensing means for sensing and recording the magnitude of ionization current produced by the ionization of the component to be detected in the detection chamber as a direct indication of the concentration of the ionizable component introduced into the chamber; and a high voltage pulser means for generating and applying bias voltage pulses at selected frequencies over a range of from about 1 kHz to 333 kHz, amplitudes up to about 500 volts and duty cycles to produce a discontinuous ionization current output sensed by the ionization current sensing means.
- Assignee:
- Dept. of Energy, Washington, DC
- Patent Number(s):
- US 4705947
- OSTI ID:
- 5633894
- Resource Relation:
- Patent File Date: Filed date 9 Apr 1985
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
IONIZATION CHAMBERS
DESIGN
CHARGE CARRIERS
ELECTRODES
HELIUM
HIGH-VOLTAGE PULSE GENERATORS
KHZ RANGE 01-100
KHZ RANGE 100-1000
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
FLUIDS
FREQUENCY RANGE
FUNCTION GENERATORS
GASES
KHZ RANGE
MEASURING INSTRUMENTS
NONMETALS
PULSE GENERATORS
RADIATION DETECTORS
RARE GASES
440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments