GB1216554A - Ion source for a mass spectrometer - Google Patents
Ion source for a mass spectrometerInfo
- Publication number
- GB1216554A GB1216554A GB03736/68A GB1373668A GB1216554A GB 1216554 A GB1216554 A GB 1216554A GB 03736/68 A GB03736/68 A GB 03736/68A GB 1373668 A GB1373668 A GB 1373668A GB 1216554 A GB1216554 A GB 1216554A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anode
- cathode
- header
- polepieces
- magnets
- 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
- 239000000919 ceramic Substances 0.000 abstract 3
- 238000010894 electron beam technology Methods 0.000 abstract 2
- 239000007787 solid Substances 0.000 abstract 2
- 230000000712 assembly Effects 0.000 abstract 1
- 238000000429 assembly Methods 0.000 abstract 1
- 239000010960 cold rolled steel Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 239000000356 contaminant Substances 0.000 abstract 1
- 238000011109 contamination Methods 0.000 abstract 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 abstract 1
- 239000010931 gold Substances 0.000 abstract 1
- 229910052737 gold Inorganic materials 0.000 abstract 1
- MSNOMDLPLDYDME-UHFFFAOYSA-N gold nickel Chemical compound [Ni].[Au] MSNOMDLPLDYDME-UHFFFAOYSA-N 0.000 abstract 1
- 239000010935 stainless steel Substances 0.000 abstract 1
- 229910001220 stainless steel Inorganic materials 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/10—Ion sources; Ion guns
- H01J49/14—Ion sources; Ion guns using particle bombardment, e.g. ionisation chambers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/10—Ion sources; Ion guns
- H01J49/14—Ion sources; Ion guns using particle bombardment, e.g. ionisation chambers
- H01J49/147—Ion sources; Ion guns using particle bombardment, e.g. ionisation chambers with electrons, e.g. electron impact ionisation, electron attachment
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Electron Tubes For Measurement (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
1,216,554. Ion sources. PERKIN-ELMER CORP. 21 March, 1968 [11 April, 1967], No. 13736/68. Heading H1D. A mass spectrometer ion source of the electron beam bombardment type comprises a cathode 36, Fig. 2, an anode 38 and a pair of bar magnet assemblies 20, 16, 22 and 24, 18, 26 on either side and parallel with the electron beam axis, one of the members 16, 18 at least being provided with a passage 28, 30 for a sample entry capillary tube 12, 14. With two sample entry capillary tubes, one, 12, is used for the introduction of gas samples and the other, 14, for the introduction of volatilized solid samples. The members 16, 18 are cold-rolled steel inserts between the permanent magnets 20, 22 and 24, 26, respectively. The ion exit slit is shown at 40. The magnets 20, 22, 24, 26 and the inserts 16, 18 as well as polepieces 32, 34 are spot welded to straps 84, 86. Stainless steel shims 88, 90 and 92, 94, each two-thousandths of an inch thick, are located between the magnets 20, 22, 24, 26 and the polepieces 32, 34. The cathode 36 and anode 38 are mounted on ceramic headers set within cylindrical holes in the polepieces 32, 34 and held by screws 98, 100, respectively. The cathode 36 comprises a hairpin filament 46, Fig. 6, or alternatively a frustoconical coil, mounted on a ceramic header 49, the header being provided with an annular cut 42 so as to form an annular skirt 44. The skirt 44 provides an annular shadow, as viewed from the cathode, free of contaminants. The cathode is surrounded by a cylindrical grid electrode 52 supported on leads 68 which pass through a recess channel 70 in the header 49. The grid electrode 52 may be a frusto-conical coil. The ceramic header for the anode 38, Fig. 2, is similar in construction (Fig. 7). The anode 38 is heated by heater 108 to reduce dielectric contamination. In addition the anode may be of solid gold or gold-nickel laminate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US63013367A | 1967-04-11 | 1967-04-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1216554A true GB1216554A (en) | 1970-12-23 |
Family
ID=24525919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB03736/68A Expired GB1216554A (en) | 1967-04-11 | 1968-03-21 | Ion source for a mass spectrometer |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3527937A (en) |
| GB (1) | GB1216554A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3172074D1 (en) * | 1981-11-27 | 1985-10-03 | Rheometron Ag | Measuring head for an electro-magnetic flow meter |
| US4985657A (en) * | 1989-04-11 | 1991-01-15 | Lk Technologies, Inc. | High flux ion gun apparatus and method for enhancing ion flux therefrom |
| GB2585158B (en) * | 2018-06-01 | 2021-07-28 | Micromass Ltd | Filament assembly |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2838676A (en) * | 1953-07-09 | 1958-06-10 | Vacuum Electronics Engineering | Ion source |
| US2911531A (en) * | 1956-03-12 | 1959-11-03 | Jersey Prod Res Co | Ionization chamber for mass spectrometer |
| BE571975A (en) * | 1957-10-11 | |||
| GB961334A (en) * | 1961-09-04 | 1964-06-17 | Ass Elect Ind | Improvements relating to ion sources for mass spectrometers |
-
1967
- 1967-04-11 US US630133A patent/US3527937A/en not_active Expired - Lifetime
-
1968
- 1968-03-21 GB GB03736/68A patent/GB1216554A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3527937A (en) | 1970-09-08 |
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