DE1491540B2 - - Google Patents

Info

Publication number
DE1491540B2
DE1491540B2 DE19631491540 DE1491540A DE1491540B2 DE 1491540 B2 DE1491540 B2 DE 1491540B2 DE 19631491540 DE19631491540 DE 19631491540 DE 1491540 A DE1491540 A DE 1491540A DE 1491540 B2 DE1491540 B2 DE 1491540B2
Authority
DE
Germany
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.)
Pending
Application number
DE19631491540
Other languages
German (de)
Other versions
DE1491540A1 (de
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 filed Critical
Publication of DE1491540A1 publication Critical patent/DE1491540A1/de
Publication of DE1491540B2 publication Critical patent/DE1491540B2/de
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/08—Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
    • H01J23/087—Magnetic focusing arrangements
    • H01J23/0873—Magnetic focusing arrangements with at least one axial-field reversal along the interaction space, e.g. P.P.M. focusing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/02—Details
    • H01J37/04—Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement or ion-optical arrangement
    • H01J37/10—Lenses
    • H01J37/14—Lenses magnetic

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Microwave Tubes (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Radiation-Therapy Devices (AREA)
DE19631491540 1962-07-03 1963-06-28 Verfahren und Vorrichtung zum Fokussieren eines Elektronenstrahlers Pending DE1491540A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US207294A US3265925A (en) 1962-07-03 1962-07-03 Field perturbing means for preventing beam scalloping in reversed field focusing system

Publications (2)

Publication Number Publication Date
DE1491540A1 DE1491540A1 (de) 1969-02-20
DE1491540B2 true DE1491540B2 (enExample) 1970-09-10

Family

ID=22769935

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19631491540 Pending DE1491540A1 (de) 1962-07-03 1963-06-28 Verfahren und Vorrichtung zum Fokussieren eines Elektronenstrahlers

Country Status (5)

Country Link
US (1) US3265925A (enExample)
DE (1) DE1491540A1 (enExample)
FR (1) FR1365620A (enExample)
GB (1) GB1049875A (enExample)
SE (1) SE301193B (enExample)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3396299A (en) * 1964-06-15 1968-08-06 Jeol Ltd Magnetic flux leakage guide for magnetic electron lenses
DE1541036B1 (de) * 1966-04-26 1970-08-06 Siemens Ag System zur Erzeugung eines Elektronenhohlstrahls fuer Laufzeitroehren,insbesondere Wanderfeldroehren hoher Leistung
US3614516A (en) * 1970-03-13 1971-10-19 Varian Associates Electron tubes employing a hollow magnetron injected beam and magnetic field reversal focusing
GB2152742B (en) * 1980-04-28 1986-02-19 Emi Varian Ltd Microwave amplifiers and oscillators
FR2591031A1 (fr) * 1985-11-29 1987-06-05 Thomson Csf Focalisateur pour faisceau electronique et tube a ondes progressives equipe d'un tel focalisateur
US7666293B2 (en) * 2007-10-04 2010-02-23 Dow Agrosciences Llc Electrochemical reduction of halogenated 4-aminopicolinic acids

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2707758A (en) * 1950-12-19 1955-05-03 Sperry Corp Travelling wave tube
NL95352C (enExample) * 1953-04-29
BE534618A (enExample) * 1954-01-04
US2817035A (en) * 1954-04-26 1957-12-17 Hughes Aircraft Co Brillouin flow electron gun
US2956198A (en) * 1955-06-10 1960-10-11 Bell Telephone Labor Inc Traveling wave tubes
NL250365A (enExample) * 1959-04-10
US3020440A (en) * 1959-06-25 1962-02-06 Rca Corp Electron beam device

Also Published As

Publication number Publication date
SE301193B (enExample) 1968-05-27
GB1049875A (en) 1966-11-30
US3265925A (en) 1966-08-09
FR1365620A (fr) 1964-07-03
DE1491540A1 (de) 1969-02-20

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