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Title: Self-modulating pressure gauge

Abstract

An ion gauge is disclosed having a reduced x-ray limit and means for measuring that limit. The gauge comprises an ion gauge of the Bayard-Alpert type having a short collector and having means for varying the grid-collector voltage. The x-ray limit (i.e. the collector current resulting from x-rays striking the collector) may then be determined by the formula: I/sub x/ = ..cap alpha..I/sub l/ - I/sub h//..cap alpha.. - l where: I/sub x/ = x-ray limit, I/sub l/ and I/sub h/ = the collector current at the lower and higher grid voltage respectively; and, ..cap alpha.. = the ratio of the collector current due to positive ions at the higher voltage to that at the lower voltage.

Inventors:
;
Issue Date:
OSTI Identifier:
6763681
Assignee:
Dept. of Energy TIC; ERA-06-006403; EDB-81-011645
DOE Contract Number:  
EY-76-C-02-0016
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BAYARD-ALPERT GAGES; DESIGN; MEASURING INSTRUMENTS; PRESSURE MEASUREMENT; X RADIATION; ELECTROMAGNETIC RADIATION; IONIZATION GAGES; IONIZING RADIATIONS; PRESSURE GAGES; RADIATIONS; VACUUM GAGES 420700* -- Engineering-- Vacuum Engineering-- (-1987); 440100 -- Radiation Instrumentation

Citation Formats

Edwards, D. Jr., and Lanni, C.P. Self-modulating pressure gauge. United States: N. p., 1979. Web.
Edwards, D. Jr., & Lanni, C.P. Self-modulating pressure gauge. United States.
Edwards, D. Jr., and Lanni, C.P. Tue . "Self-modulating pressure gauge". United States.
@article{osti_6763681,
title = {Self-modulating pressure gauge},
author = {Edwards, D. Jr. and Lanni, C.P.},
abstractNote = {An ion gauge is disclosed having a reduced x-ray limit and means for measuring that limit. The gauge comprises an ion gauge of the Bayard-Alpert type having a short collector and having means for varying the grid-collector voltage. The x-ray limit (i.e. the collector current resulting from x-rays striking the collector) may then be determined by the formula: I/sub x/ = ..cap alpha..I/sub l/ - I/sub h//..cap alpha.. - l where: I/sub x/ = x-ray limit, I/sub l/ and I/sub h/ = the collector current at the lower and higher grid voltage respectively; and, ..cap alpha.. = the ratio of the collector current due to positive ions at the higher voltage to that at the lower voltage.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {8}
}