GB1048953A - A circuit arrangement for determining the x-ray limit of ionisation vacuum manometer tubes - Google Patents
A circuit arrangement for determining the x-ray limit of ionisation vacuum manometer tubesInfo
- Publication number
- GB1048953A GB1048953A GB449865A GB449865A GB1048953A GB 1048953 A GB1048953 A GB 1048953A GB 449865 A GB449865 A GB 449865A GB 449865 A GB449865 A GB 449865A GB 1048953 A GB1048953 A GB 1048953A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- tube
- determining
- circuit arrangement
- cathodes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J41/00—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas; Discharge tubes for evacuation by diffusion of ions
- H01J41/02—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas
- H01J41/04—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas with ionisation by means of thermionic cathodes
Landscapes
- Measurement Of Radiation (AREA)
Abstract
1,048,953. Ionization manometers. DEUTSCHE AKADEMIE DER WISSENSCHAFTEN ZU BERLIN. Feb. 2, 1965, No. 4498/65. Heading H1D. [Also in Division G1] The X-ray current of a manometer tube of the Bayard-Alpert type having two cathodes of which only one is heated is determined by connecting the unheated cathode to a switch enabling its potential and thus the sensitivity of the tube to be varied. The tube comprises an ion collector 1, grid 2 and two cathodes 3 and 4, cathode 3 being heated. An earthed layer 5 of tin-oxide covering the inner wall of the tube may be replaced by a metal sleeve. Switch 6 enables the cathode 4 to be connected to cathode 3, to earth, or to the grid 2. By taking two measurements of the ion current with different potentials on the cathode 4, the X-ray current, which remains constant, can be calculated. The prior use of an auxiliary " modulato " electrode for this purpose is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB449865A GB1048953A (en) | 1965-02-02 | 1965-02-02 | A circuit arrangement for determining the x-ray limit of ionisation vacuum manometer tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB449865A GB1048953A (en) | 1965-02-02 | 1965-02-02 | A circuit arrangement for determining the x-ray limit of ionisation vacuum manometer tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1048953A true GB1048953A (en) | 1966-11-23 |
Family
ID=9778326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB449865A Expired GB1048953A (en) | 1965-02-02 | 1965-02-02 | A circuit arrangement for determining the x-ray limit of ionisation vacuum manometer tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1048953A (en) |
-
1965
- 1965-02-02 GB GB449865A patent/GB1048953A/en not_active Expired
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