Title: Hot cathode extreme high vacuum gauge
Application Number: 85100568 Application Date: 1985.04.01
Publication Number: 1000433 Publication Date: 1986.03.10
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G01L21/30,H01J17/12,H01J41/00
Applicant(s) Name: Nanjing Polytechnical College Address:
Inventor(s) Name: Chen Hongyuan, Huang Huifen
Attorney & Agent: LOU GAOCHAO YAO JIANNAN
Abstract:
     The invention having a squirrel-cage grid, a short collector and a ring filament, the sensitivity is increased by choosing suitable electric parameter as well as using the vacuum duct as the shield. By changing the position of the X-ray source, the background of the photoelectric current is decreased and the measurement range is expanded. The gauge is suitable for measuring the pressure between 10 to the power-4~10 to the power-12 torr. It should be noted that the pressure between 10 to the power-10~10 to the power-12 torr can not be measured with the normal B-A gauge.
Time: 11
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