FR1247837A - Method and apparatus for focusing an electron beam - Google Patents

Method and apparatus for focusing an electron beam

Info

Publication number
FR1247837A
FR1247837A FR818298A FR818298A FR1247837A FR 1247837 A FR1247837 A FR 1247837A FR 818298 A FR818298 A FR 818298A FR 818298 A FR818298 A FR 818298A FR 1247837 A FR1247837 A FR 1247837A
Authority
FR
France
Prior art keywords
focusing
electron beam
electron
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
FR818298A
Other languages
French (fr)
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.)
Varian Medical Systems Inc
Original Assignee
Varian Associates Inc
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 Varian Associates Inc filed Critical Varian Associates Inc
Application granted granted Critical
Publication of FR1247837A publication Critical patent/FR1247837A/en
Expired 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
FR818298A 1959-02-16 1960-02-12 Method and apparatus for focusing an electron beam Expired FR1247837A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US793495A US3013173A (en) 1959-02-16 1959-02-16 Magnetic beam focusing method and apparatus

Publications (1)

Publication Number Publication Date
FR1247837A true FR1247837A (en) 1960-12-02

Family

ID=25160039

Family Applications (1)

Application Number Title Priority Date Filing Date
FR818298A Expired FR1247837A (en) 1959-02-16 1960-02-12 Method and apparatus for focusing an electron beam

Country Status (3)

Country Link
US (1) US3013173A (en)
FR (1) FR1247837A (en)
GB (1) GB945610A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL250375A (en) * 1959-04-13
US3164742A (en) * 1960-12-27 1965-01-05 Gen Electric High frequency energy interchange device
US3206635A (en) * 1961-04-27 1965-09-14 Gen Electric Electron stream focusing
GB1054462A (en) * 1963-02-06
US3328619A (en) * 1963-06-17 1967-06-27 Gen Electric Aiding magnets for minimizing length of reversal zone
GB2152742B (en) * 1980-04-28 1986-02-19 Emi Varian Ltd Microwave amplifiers and oscillators
US4392078A (en) * 1980-12-10 1983-07-05 General Electric Company Electron discharge device with a spatially periodic focused beam
EP0624893A3 (en) * 1993-05-12 1995-10-11 Eev Ltd Magnet arrangements.
FR2811857B1 (en) * 2000-07-11 2003-01-17 Commissariat Energie Atomique SPALLATION DEVICE FOR THE PRODUCTION OF NEUTRONS
US10773093B2 (en) * 2017-05-29 2020-09-15 Elegant Mathematics LLC Real-time methods for magnetic resonance spectra acquisition, imaging and non-invasive ablation

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2439401A (en) * 1942-09-10 1948-04-13 Raytheon Mfg Co Magnetron oscillator of the resonant cavity type
GB729812A (en) * 1949-09-22 1955-05-11 Sperry Corp Improvements in or relating to high-frequency electron-discharge tubes
US2855537A (en) * 1953-04-29 1958-10-07 Bell Telephone Labor Inc Electron beam focusing
US2844754A (en) * 1953-04-29 1958-07-22 Bell Telephone Labor Inc Electron beam focusing system
US2860278A (en) * 1954-09-08 1958-11-11 Bell Telephone Labor Inc Non-reciprocal wave transmission
US2808510A (en) * 1955-01-26 1957-10-01 Rca Corp Apparatus utilizing atomic or molecular beams

Also Published As

Publication number Publication date
US3013173A (en) 1961-12-12
GB945610A (en) 1964-01-02

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