Pulsed helium ionization detection system

Patent · Mon Nov 09 23:00:00 EST 1987

OSTI ID:5633894

Ramsey, R S; Todd, R A

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
• Country of Publication: United States
• Language: English

Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CHARGE CARRIERS
DESIGN
ELECTRODES
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
FLUIDS
FREQUENCY RANGE
FUNCTION GENERATORS
GASES
HELIUM
HIGH-VOLTAGE PULSE GENERATORS
IONIZATION CHAMBERS
KHZ RANGE
KHZ RANGE 01-100
KHZ RANGE 100-1000
MEASURING INSTRUMENTS
NONMETALS
PULSE GENERATORS
RADIATION DETECTORS
RARE GASES