Bromine-quenched high temperature G-M tube with passivated cathode
Patent
·
OSTI ID:4174333
A bromine doped self-quenching Geiger-Mueller tube having an operational life expectancy in excess of 1,200 hours at a temperature of 315$sup 0$C is described. The tube comprises a passivated metal coated cathode which is conditioned or aged for operation at room temperature, thus obviating the necessity of thermally cycling the tube at progressively elevated temperatures. Useful metal coatings for the cathode include chromium, platinum, and nickel- copper alloys deposited in a layer less than about 1 mil thick. A method for passivating the metal coated cathode and subsequently conditioning the tube and its contents is disclosed. (auth)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-33-000708
- Assignee:
- to Kewanee Oil Co.
- Patent Number(s):
- US 3892990
- OSTI ID:
- 4174333
- Country of Publication:
- United States
- Language:
- English
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