GB806787A - Improvements in or relating to the production of a high plasma density in the anode region of a low pressure gas discharge - Google Patents
Improvements in or relating to the production of a high plasma density in the anode region of a low pressure gas dischargeInfo
- Publication number
- GB806787A GB806787A GB33009/55A GB3300955A GB806787A GB 806787 A GB806787 A GB 806787A GB 33009/55 A GB33009/55 A GB 33009/55A GB 3300955 A GB3300955 A GB 3300955A GB 806787 A GB806787 A GB 806787A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anode
- magnetic field
- bore
- discharge
- cathode
- 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
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 4
- 150000002500 ions Chemical class 0.000 abstract 4
- 239000007789 gas Substances 0.000 abstract 3
- 239000004020 conductor Substances 0.000 abstract 2
- 229910052742 iron Inorganic materials 0.000 abstract 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract 1
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 238000004020 luminiscence type Methods 0.000 abstract 1
- 229910052750 molybdenum Inorganic materials 0.000 abstract 1
- 239000011733 molybdenum Substances 0.000 abstract 1
- 239000011819 refractory material Substances 0.000 abstract 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 abstract 1
- 239000010937 tungsten Substances 0.000 abstract 1
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
- H01J41/06—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas with ionisation by means of cold cathodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J27/00—Ion beam tubes
- H01J27/02—Ion sources; Ion guns
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J27/00—Ion beam tubes
- H01J27/02—Ion sources; Ion guns
- H01J27/08—Ion sources; Ion guns using arc discharge
- H01J27/10—Duoplasmatrons ; Duopigatrons
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Electron Sources, Ion Sources (AREA)
Abstract
806,787. Discharge apparatus. VEB, VAKUTRONIK. Nov. 18, 1955 [May, 10, 1955] No. 33009/55. Class 39(1). An arrangement for the production of a high plasma density in the anode region of a low pressure gas discharge is characterised in that the discharge occurs in a strongly heterogeneous magnetic field, that the cathode or discharge portion serving as a supplier of electrons is disposed in a region of low magnetic field strength, that the anode is constituted by an axially bored disc disposed in a region of higher magnetic field strength, and that the magnetic field lines intersecting the cathode or discharge portion serving as a supplier of electrons converge on the anode bore. A testing apparatus, Fig. 1, for locating leaks in high vacuum equipment with hydrogen as the test gas comprises a glass envelope 6a which is attached to the vacuum equipment and is surrounded by a cylindrically milled-out iron member 7 provided with a permanent magnet 8 and an iron yoke 9. The magnet pole pieces 1 and 2 are located inside the envelope 6a and have axial bores, the walls of which act as cold cathodes. A ring anode 3, arranged symmetrically between the pole pieces 1 and 2, is provided with a lead-in conductor 10. A cylindrical member 6 connecting the pole pieces 1 and 2 is connected to a lead-in conductor 11. Electrons oscillate through the ring anode 3 and the discharge plasma is compressed by the magnetic field with consequent increase of the luminescence, which is further almost doubled by means of a mirror 4, thus enabling the gas which is at a pressure of about 10<SP>-5</SP> Tor. to be analysed by a simple pocket spectroscope 5 arranged coaxially with the anode and cathodes. The arrangement is applicable to ion sources, in which a high plasma density is desirable so that a high density beam of ions may be produced. In the ion source shown in Fig. 2, a thermionic cathode 12 is arranged in a bore in a magnet pole piece 14. The plasma 13 is compressed by the magnetic field between the pole piece 14 and a further pole piece 15 which acts as the anode and is provided with an inlay 16 of refractory material such as molybdenum or tungsten forming the ion emission aperture. In an alternative embodiment the bore in pole piece 14 is lengthened and the cathode 12 is spaced from the bore so that an additional compression of the plasma occurs at the entrance to the bore.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEA22652A DE1058638B (en) | 1955-05-10 | 1955-05-10 | Arrangement for producing a high plasma density with a low neutral gas pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB806787A true GB806787A (en) | 1958-12-31 |
Family
ID=6925237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33009/55A Expired GB806787A (en) | 1955-05-10 | 1955-11-18 | Improvements in or relating to the production of a high plasma density in the anode region of a low pressure gas discharge |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2826709A (en) |
| CH (1) | CH335768A (en) |
| DE (1) | DE1058638B (en) |
| GB (1) | GB806787A (en) |
| NL (1) | NL197973A (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL238660A (en) * | 1958-04-28 | |||
| US2892114A (en) * | 1958-05-06 | 1959-06-23 | Wallace D Kilpatrick | Continuous plasma generator |
| US3029199A (en) * | 1958-05-20 | 1962-04-10 | William R Baker | Plasma device |
| US2920234A (en) * | 1958-05-27 | 1960-01-05 | John S Luce | Device and method for producing a high intensity arc discharge |
| US2920235A (en) * | 1958-07-24 | 1960-01-05 | Persa R Bell | Method and apparatus for producing intense energetic gas discharges |
| US2919370A (en) * | 1958-10-28 | 1959-12-29 | Plasmadyne Corp | Electrodeless plasma torch and method |
| US3007072A (en) * | 1959-01-29 | 1961-10-31 | Gen Electric | Radial type arc plasma generator |
| US3003080A (en) * | 1959-05-27 | 1961-10-03 | Richard F Post | Apparatus for minimizing energy losses from magnetically confined volumes of hot plasma |
| US2926276A (en) * | 1959-06-02 | 1960-02-23 | Saburo M Moriya | Apparatus for the ionization of electrons of flowable materials |
| GB897577A (en) * | 1959-07-15 | 1962-05-30 | Bristol Siddeley Engines Ltd | Improvements in or relating to apparatus for producing a jet consisting of a plasma of ions and electrons |
| US2961559A (en) * | 1959-08-28 | 1960-11-22 | Jr John Marshall | Methods and means for obtaining hydromagnetically accelerated plasma jet |
| NL261279A (en) * | 1960-03-08 | |||
| US3164739A (en) * | 1960-07-20 | 1965-01-05 | Vakutronik Veb | Ion source of a duo-plasmatron |
| NL278366A (en) * | 1961-05-27 | |||
| US3946332A (en) * | 1974-06-13 | 1976-03-23 | Samis Michael A | High power density continuous wave plasma glow jet laser system |
| CN110418953B (en) * | 2017-03-13 | 2020-09-11 | 佳能安内华股份有限公司 | Cold cathode ionization vacuum gauge and cold cathode ionization vacuum gauge cassette |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1498536A (en) * | 1920-08-02 | 1924-06-24 | Baruch Sydney Norton | Apparatus for producing continuous electrical oscillations |
| GB335537A (en) * | 1928-10-03 | 1930-09-24 | Julius Edgar Lilienfeld | Improvements relating to vacuum tubes of the auto-electronic or non-thermic type |
| US2217187A (en) * | 1936-02-01 | 1940-10-08 | Raytheon Mfg Co | Electrical discharge apparatus |
| NL59155C (en) * | 1940-07-27 | |||
| US2352657A (en) * | 1941-06-09 | 1944-07-04 | Teletype Corp | Electromagnetically controlled thermionic relay |
| US2440851A (en) * | 1944-03-08 | 1948-05-04 | Rca Corp | Electron discharge device of the magnetron type |
| US2502236A (en) * | 1945-09-12 | 1950-03-28 | Raytheon Mfg Co | Gaseous discharge device |
| US2712097A (en) * | 1950-04-11 | 1955-06-28 | Auwaerter Max | High Vacuum Measuring Device |
-
0
- NL NL197973D patent/NL197973A/xx unknown
-
1955
- 1955-05-10 DE DEA22652A patent/DE1058638B/en active Pending
- 1955-06-02 CH CH335768D patent/CH335768A/en unknown
- 1955-11-18 GB GB33009/55A patent/GB806787A/en not_active Expired
-
1956
- 1956-01-24 US US561108A patent/US2826709A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CH335768A (en) | 1959-01-31 |
| NL197973A (en) | |
| DE1058638B (en) | 1959-06-04 |
| US2826709A (en) | 1958-03-11 |
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