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
- 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}
}
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