GB907511A - Method of detecting ions - Google Patents
Method of detecting ionsInfo
- Publication number
- GB907511A GB907511A GB2645059A GB2645059A GB907511A GB 907511 A GB907511 A GB 907511A GB 2645059 A GB2645059 A GB 2645059A GB 2645059 A GB2645059 A GB 2645059A GB 907511 A GB907511 A GB 907511A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ions
- secondary electrons
- scintillator
- foil
- disc
- 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
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/025—Detectors specially adapted to particle spectrometers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/28—Measuring radiation intensity with secondary-emission detectors
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Measurement Of Radiation (AREA)
Abstract
907,511. Mass spectrometers. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. July 4, 1960 [July 31, 1959], No. 26450/59. Class 39 (1). In a method of detecting ions, e.g. in mass spectrometry, the ions strike a thin foil of such thickness that only desired ions can penetrate to the back surface of the foil to liberate secondary electrons which pass to an electron detector such as a scintillometer. In this way it is possible to distinguish between ions of the same mass and charge but having different numbers of constituent nuclei, e.g. H 2 + and D+ ions, H 3 + and HD+ ions or He+ and " air " ions, or, according to the Provisional Specification, atomic and molecular potassium ions. In Fig. 1, a thin aluminium foil is supported on a nylon film 14 which is transparent to secondary electrons. The foil is mounted in a polished stainless steel holder 12 and receives ions passing from a mass spectrometer through the slit 4 in a plate 3. Holes 5 are pumping holes. The secondary electrons liberated at the back surface of the disc 14 pass through a slit 13 in the holder 12 to a scintillometer comprising an organic scintillator 8, e.g. polystyrene, and a photomultiplier tube 11. A layer of aluminium 0.05 Á thick is provided on the surface of the scintillator and a silicone oil provides good optical contact between the scintillator and the photo-multiplier. The holder 12 is held at a high negative potential to accelerate both the ions on to the disc 14 and the secondary electrons away from the disc. An anti-corona ball 21 is provided on top of the glass metal seal 16. In Fig. 2, the ions 27 are accelerated on to the disc 14, secondary electrons 28 liberated at the back surface are detected by scintillator 8 and photo-multiplier 11 while secondary electrons 29 liberated at the front surface are detected by scintillator 8<SP>1</SP> and photo-multiplier 11<SP>1</SP> to provide a measure of the total number of ions in the beam 27. An anti-breakdown polystyrene guard ring 25 is fixed on the insulator 26 containing the lead 22. An aluminium foil may be prepared by vacuum coating on glass and then floating off in water and lifting on a small ring which is push fitted in the holder. A carbon or gold foil may be used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2645059A GB907511A (en) | 1959-07-31 | 1959-07-31 | Method of detecting ions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2645059A GB907511A (en) | 1959-07-31 | 1959-07-31 | Method of detecting ions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB907511A true GB907511A (en) | 1962-10-03 |
Family
ID=10243807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2645059A Expired GB907511A (en) | 1959-07-31 | 1959-07-31 | Method of detecting ions |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB907511A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2381373A (en) * | 2001-05-29 | 2003-04-30 | Thermo Masslab Ltd | Time of flight mass spectrometer and multiple detector therefor |
| US6864479B1 (en) | 1999-09-03 | 2005-03-08 | Thermo Finnigan, Llc | High dynamic range mass spectrometer |
-
1959
- 1959-07-31 GB GB2645059A patent/GB907511A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6864479B1 (en) | 1999-09-03 | 2005-03-08 | Thermo Finnigan, Llc | High dynamic range mass spectrometer |
| GB2381373A (en) * | 2001-05-29 | 2003-04-30 | Thermo Masslab Ltd | Time of flight mass spectrometer and multiple detector therefor |
| GB2381373B (en) * | 2001-05-29 | 2005-03-23 | Thermo Masslab Ltd | Time of flight mass spectrometer and multiple detector therefor |
| US6940066B2 (en) | 2001-05-29 | 2005-09-06 | Thermo Finnigan Llc | Time of flight mass spectrometer and multiple detector therefor |
| DE10296885B4 (en) * | 2001-05-29 | 2010-09-16 | Thermo Finnigan Llc, San Jose | Time of flight mass spectrometer and method for detecting the time of flight of ions |
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