GB791375A - Improvements in or relating to safety circuit arrangements for multiplier tubes - Google Patents

Improvements in or relating to safety circuit arrangements for multiplier tubes

Info

Publication number
GB791375A
GB791375A GB17793/56A GB1779356A GB791375A GB 791375 A GB791375 A GB 791375A GB 17793/56 A GB17793/56 A GB 17793/56A GB 1779356 A GB1779356 A GB 1779356A GB 791375 A GB791375 A GB 791375A
Authority
GB
United Kingdom
Prior art keywords
electrode
resistor
electrodes
current
diode
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
Application number
GB17793/56A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB791375A publication Critical patent/GB791375A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
    • H01J43/04—Electron multipliers
    • H01J43/30—Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H03F1/54—Circuit arrangements for protecting such amplifiers with tubes only
    • H03F1/548—Protection of anode or grid circuit against overload

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Details Of Television Scanning (AREA)

Abstract

791,375. Circuits for electron multipliers. PHILIPS ELECTRICAL INDUSTRIES, Ltd. June 8, 1956 [June 11, 1955], No. 17793/56. Class 40 (6). The current in a multiplier tube is limited to a safe value by connecting a diode in series with the supply to one of the secondary emission electrodes and a resistance from that electrode to a point of lower potential. In the embodiment, a photomultiplier has the potential between anode 9 and electrodes 5 to 8 normally stabilized by gas-discharge tubes; the current in the germanium diode 21 is equal to that in resistor 22 reduced by that flowing from electrode 7. Under incidence on the cathode 2 of excessive light, the emission from electrode 7 may become sufficient to cause the voltage drop in resistor 22 to exceed that of the gas tube 17, 18, thereby cutting-off the diode 21 so that further increase in emission from electrode 7 reduces the voltage between electrodes 7 and 8, hence preventing further increase in multiplication in stages 7-8 and 8-9. The multiplication in stage 6-7 will increase slightly but further increase in the current in resistor 22 will reduce the gain by saturation. Two variable resistors 15, 16 are provided as gain controls.
GB17793/56A 1955-06-11 1956-06-08 Improvements in or relating to safety circuit arrangements for multiplier tubes Expired GB791375A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL791375X 1955-06-11

Publications (1)

Publication Number Publication Date
GB791375A true GB791375A (en) 1958-02-26

Family

ID=19834420

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17793/56A Expired GB791375A (en) 1955-06-11 1956-06-08 Improvements in or relating to safety circuit arrangements for multiplier tubes

Country Status (5)

Country Link
US (1) US2846591A (en)
DE (1) DE1026884B (en)
FR (1) FR1153981A (en)
GB (1) GB791375A (en)
NL (1) NL104002C (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3050632A (en) * 1959-04-21 1962-08-21 Litton Systems Inc Photo-transducer signal compressor
GB970707A (en) * 1960-02-23 1964-09-23 Bruce Peebles & Co Ltd Photo-responsive units
US3227875A (en) * 1961-05-04 1966-01-04 Eberline Instr Corp Gamma dose rate meter utilizing a scintillation detector
US3296538A (en) * 1963-04-04 1967-01-03 Vincent D Stabilito Photomultiplier amplifier and power supply
FR1582850A (en) * 1968-03-29 1969-10-10
US3543095A (en) * 1968-11-05 1970-11-24 Us Navy Photocathode protection circuit
FR2516338A1 (en) * 1981-11-09 1983-05-13 Tardivet Marc Exposure control appts. for X=ray generator - has three separate photomultipliers for image amplification and compensated charging capacitor in signal monitoring circuit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB478153A (en) * 1936-11-13 1938-01-13 Gen Electric Co Ltd Improvements in or relating to circuits including secondary emission electron multipliers
US2160797A (en) * 1936-11-20 1939-05-30 Bell Telephone Labor Inc Electron discharge apparatus

Also Published As

Publication number Publication date
DE1026884B (en) 1958-03-27
NL104002C (en)
US2846591A (en) 1958-08-05
FR1153981A (en) 1958-03-31

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