GB1476213A - Photocathodes - Google Patents

Photocathodes

Info

Publication number
GB1476213A
GB1476213A GB3106674A GB3106674A GB1476213A GB 1476213 A GB1476213 A GB 1476213A GB 3106674 A GB3106674 A GB 3106674A GB 3106674 A GB3106674 A GB 3106674A GB 1476213 A GB1476213 A GB 1476213A
Authority
GB
United Kingdom
Prior art keywords
photocathode
baking
july
cathode
evaporating
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
GB3106674A
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.)
RCA Corp
Original Assignee
RCA Corp
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 RCA Corp filed Critical RCA Corp
Publication of GB1476213A publication Critical patent/GB1476213A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/12—Manufacture of electrodes or electrode systems of photo-emissive cathodes; of secondary-emission electrodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)

Abstract

1476213 Photocathodes R C A CORPORATION 12 July 1974 [12 July 1973] 31066/74 Heading H1D A photocathode comprising a layer of Sb and K deposited on a substrate is sensitized by heating to 200-250‹ C., successively evaporating on to the heated layer Na, Sb and K, baking to 210‹-250‹ C. and evaporating K a number of times whilst reducing the temperature to 170‹ C; each evaporation step and the baking are continued at least until a maximum sensitivity is achieved and preferably until it falls to 70-80% of the maximum. The photocathode is able to operate at higher temperature than those sensitized with Cs. The cathode is formed on the inner surface of a photo multiplier tube containing sources of Na, Sb and K. The sources of Na and K comprise Na and K chromate, Zr and W respectively. The cathode may be used as a secondary electron emitter.
GB3106674A 1973-07-12 1974-07-12 Photocathodes Expired GB1476213A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00378517A US3838304A (en) 1973-07-12 1973-07-12 Method of making a bialkali photocathode with improved sensitivity and high temperature operating characteristics

Publications (1)

Publication Number Publication Date
GB1476213A true GB1476213A (en) 1977-06-10

Family

ID=23493426

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3106674A Expired GB1476213A (en) 1973-07-12 1974-07-12 Photocathodes

Country Status (3)

Country Link
US (1) US3838304A (en)
JP (1) JPS5146582B2 (en)
GB (1) GB1476213A (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3992071A (en) * 1975-04-01 1976-11-16 The United States Of America As Represented By The Secretary Of The Army Processes for activating S-1 cathode
US4002735A (en) * 1975-06-04 1977-01-11 Rca Corporation Method of sensitizing electron emissive surfaces of antimony base layers with alkali metal vapors
JPS55112765A (en) * 1979-02-20 1980-08-30 Sabun Kogyosho:Kk Tip for barrel grinding
US4306188A (en) * 1979-10-30 1981-12-15 Rca Corporation Photomultiplier tube having a photocurrent collector
US4407871A (en) * 1980-03-25 1983-10-04 Ex-Cell-O Corporation Vacuum metallized dielectric substrates and method of making same
US4431711A (en) * 1980-03-25 1984-02-14 Ex-Cell-O Corporation Vacuum metallizing a dielectric substrate with indium and products thereof
US4376246A (en) * 1981-01-22 1983-03-08 Rca Corporation Shielded focusing electrode assembly for a photomultiplier tube
US4407857A (en) * 1981-06-30 1983-10-04 Rca Corporation Method for processing a lithium-sodium-antimony photocathode
JPS59191251U (en) * 1983-06-03 1984-12-19 株式会社東芝 Abrasive material
JPS60242960A (en) * 1984-05-17 1985-12-02 Tipton Mfg Corp Porous resin media and its manufacturing method
US4568567A (en) * 1984-10-09 1986-02-04 Rca Corporation Method of removing trace quantities of alkali metal impurities from a bialkali-antimonide photoemissive cathode
JPH0318128Y2 (en) * 1985-10-31 1991-04-17
US4839511A (en) * 1988-01-29 1989-06-13 Board Of Regents, The U. Of Texas System Enhanced sensitivity photodetector having a multi-layered, sandwich-type construction
JP5380258B2 (en) * 2009-11-27 2014-01-08 学校法人光産業創成大学院大学 Photocathode manufacturing method
CN105140084B (en) * 2015-07-24 2017-04-19 北方夜视技术股份有限公司 Fabrication method of sodium-cesium-antimony bialkali photocathode

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3658400A (en) * 1970-03-02 1972-04-25 Rca Corp Method of making a multialkali photocathode with improved sensitivity to infrared light and a photocathode made thereby
US3753023A (en) * 1971-12-03 1973-08-14 Rca Corp Electron emissive device incorporating a secondary electron emitting material of antimony activated with potassium and cesium

Also Published As

Publication number Publication date
DE2433664A1 (en) 1975-01-30
US3838304A (en) 1974-09-24
JPS5146582B2 (en) 1976-12-09
DE2433664B2 (en) 1976-05-06
JPS5039870A (en) 1975-04-12

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee