Pulsed helium ionization detection system

Patent · Wed Dec 31 23:00:00 EST 1986

OSTI ID:866419

Ramsey, Roswitha S ^[1]; Todd, Richard A ^[1]

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1. Knoxville, TN

A helium ionization detection system is provided which produces stable operation of a conventional helium ionization detector while providing improved sensitivity and linearity. Stability is improved by applying pulsed dc supply voltage across the ionization detector, thereby modifying the sampling of the detectors output current. A unique pulse generator is used to supply pulsed dc to the detector which has variable width and interval adjust features that allows up to 500 V to be applied in pulse widths ranging from about 150 nsec to about dc conditions.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
• DOE Contract Number: W-7405-ENG-26
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4705947
• OSTI ID: 866419
• Country of Publication: United States
• Language: English

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supply
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