GB1457257A - Method of operating a photomultiplier tube - Google Patents

Method of operating a photomultiplier tube

Info

Publication number
GB1457257A
GB1457257A GB5756472A GB5756472A GB1457257A GB 1457257 A GB1457257 A GB 1457257A GB 5756472 A GB5756472 A GB 5756472A GB 5756472 A GB5756472 A GB 5756472A GB 1457257 A GB1457257 A GB 1457257A
Authority
GB
United Kingdom
Prior art keywords
dynode
electrode
photocathode
potential
tube
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
GB5756472A
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.)
EMI Ltd
Original Assignee
EMI 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 EMI Ltd filed Critical EMI Ltd
Priority to GB5756472A priority Critical patent/GB1457257A/en
Publication of GB1457257A publication Critical patent/GB1457257A/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

Landscapes

  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)

Abstract

1457257 Photomultipliers EMI Ltd 6 Dec 1973 [13 Dec 1972] 57564/72 Heading H1D In a method of operating a photomultiplier tube, the tube having a photocathode 3, a dynode 4 and focusing electrodes 7, 10, there being periods in the operation when photoelectrons are diverted from impinging on dynode 4, the method includes the step of pulsing focusing electrode 10 to a potential negative relative to the photocathode potential during said periods, the first focusing electrode being conductively connected to said dynode electrode which is maintained at a positive potential relative to photocathode potential. The arrangement enables the tube sensitivity to be initially reduced when observing short duration, bright events such as in laser remote densitometers, and a rapid return to maximum sensitivity in view of the reduced likelihood of a build up of space charge at the photocathode. Focusing electrode 7 may be permanently connected to the first (or only) dynode 4, or may be connected externally. Switch means may enable electrode 7 to be connected to electrode 10, or to dynode 4 alone when the suppression feature is required.
GB5756472A 1972-12-13 1972-12-13 Method of operating a photomultiplier tube Expired GB1457257A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5756472A GB1457257A (en) 1972-12-13 1972-12-13 Method of operating a photomultiplier tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5756472A GB1457257A (en) 1972-12-13 1972-12-13 Method of operating a photomultiplier tube

Publications (1)

Publication Number Publication Date
GB1457257A true GB1457257A (en) 1976-12-01

Family

ID=10479493

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5756472A Expired GB1457257A (en) 1972-12-13 1972-12-13 Method of operating a photomultiplier tube

Country Status (1)

Country Link
GB (1) GB1457257A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee
732 Registration of transactions, instruments or events in the register (sect. 32/1977)