FR2415352A1 - Ensemble magnetique en circuit ouvert pour des tubes a champs croises - Google Patents

Ensemble magnetique en circuit ouvert pour des tubes a champs croises

Info

Publication number
FR2415352A1
FR2415352A1 FR7900946A FR7900946A FR2415352A1 FR 2415352 A1 FR2415352 A1 FR 2415352A1 FR 7900946 A FR7900946 A FR 7900946A FR 7900946 A FR7900946 A FR 7900946A FR 2415352 A1 FR2415352 A1 FR 2415352A1
Authority
FR
France
Prior art keywords
cross
open circuit
magnetic assembly
circuit magnetic
field tubes
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.)
Granted
Application number
FR7900946A
Other languages
English (en)
Other versions
FR2415352B1 (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
Publication of FR2415352A1 publication Critical patent/FR2415352A1/fr
Application granted granted Critical
Publication of FR2415352B1 publication Critical patent/FR2415352B1/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0273—Magnetic circuits with PM for magnetic field generation
    • H01F7/0278—Magnetic circuits with PM for magnetic field generation for generating uniform fields, focusing, deflecting electrically charged particles
    • 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
    • H01J23/10—Magnet systems for directing or deflecting the discharge along a desired path, e.g. a spiral path

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microwave Tubes (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

L'invention concerne un ensemble magnétique en circuit ouvert pour des tubes à champs croisés. Il comporte un premier aimant permanent de forte induction, par exemple en Alnico, un second aimant permanent de moindre induction mais de plus forte force coercitive, par exemple en samarium-cobalt, de plus grande surface mais de plus petit volume, et une pièce intermédiaire tronconique intercalée entre les deux aimants et adaptant leurs caractéristiques. L'invention s'applique notamment à des magnétrons.
FR7900946A 1978-01-19 1979-01-16 Ensemble magnetique en circuit ouvert pour des tubes a champs croises Expired FR2415352B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/870,963 US4187444A (en) 1978-01-19 1978-01-19 Open-circuit magnet structure for cross-field tubes and the like

Publications (2)

Publication Number Publication Date
FR2415352A1 true FR2415352A1 (fr) 1979-08-17
FR2415352B1 FR2415352B1 (fr) 1986-11-21

Family

ID=25356424

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7900946A Expired FR2415352B1 (fr) 1978-01-19 1979-01-16 Ensemble magnetique en circuit ouvert pour des tubes a champs croises

Country Status (8)

Country Link
US (1) US4187444A (fr)
JP (1) JPS54113099A (fr)
CA (1) CA1130371A (fr)
DE (1) DE2901554A1 (fr)
FR (1) FR2415352B1 (fr)
GB (1) GB2013036B (fr)
IL (1) IL55954A (fr)
IT (1) IT1110942B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2496337A1 (fr) * 1980-12-15 1982-06-18 Varian Associates Structure d'aimants permanents pour tubes electroniques a faisceau lineaire
EP0653096A4 (en) * 1992-07-27 1995-06-21 New York University High field magnets for medical applications.

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4254395A (en) * 1979-12-26 1981-03-03 Robert Bosch Gmbh Electromechanical force converter for measuring gas pressure
US4319096A (en) * 1980-03-13 1982-03-09 Winey James M Line radiator ribbon loudspeaker
DE3013857C2 (de) * 1980-04-10 1984-03-01 Robert Bosch Gmbh, 7000 Stuttgart Mechanisch-elektrischer Druckwandler
JPS5820657B2 (ja) * 1980-06-24 1983-04-25 日鉄鉱業株式会社 磁性流体による比重選別方法及びその装置
DE4102102C2 (de) * 1991-01-25 1995-09-07 Leybold Ag Magnetanordnung mit wenigstens zwei Permanentmagneten sowie ihre Verwendung
US5357168A (en) * 1991-09-17 1994-10-18 Goldstar Co., Ltd. Magnetron having a cathode with tapered end shields
GB9723478D0 (en) * 1997-11-07 1998-01-07 Eev Ltd Magnetrons
DE102013108667B4 (de) 2013-08-09 2024-03-14 Muegge Gmbh Magnetfelderzeugungsvorrichtung für eine Magnetronröhre, Magnetron und Verfahren zum Austausch einer alten Magnetronröhre eines Magnetrons gegen eine neue Magnetronröhre
CN113097033B (zh) * 2021-03-31 2023-07-21 广东威特真空电子制造有限公司 磁控管装置和微波炉

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1156815A (fr) * 1954-08-18 1958-05-21 Tesla Np Procédé pour limiter le flux magnétique dispersé dans les systèmes magnétiques à polarité constante et système magnétique pour l'application dudit procédé
FR1167248A (fr) * 1957-02-26 1958-11-21 Csf Perfectionnements aux aimants permanents
FR1501400A (fr) * 1965-12-06 1967-11-10 Gen Electric Perfectionnements apportés aux aimants composites en matières magnétiques différentes
US3768054A (en) * 1972-04-03 1973-10-23 Gen Electric Low flux leakage magnet construction
FR2316710A1 (fr) * 1975-06-20 1977-01-28 Bosch Gmbh Robert Aimant segmentaire, procede pour sa fabrication et son utilisation
US4048542A (en) * 1975-04-25 1977-09-13 Tokyo Shibaura Electric Co., Ltd. Permanent magnets of different magnetic materials for magnetrons
GB1528151A (en) * 1975-10-31 1978-10-11 English Electric Valve Co Ltd Permanent magnets

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3134057A (en) * 1960-07-11 1964-05-19 Sumitomo Metal Ind Magnetic circuit for the deflection of flux leakage
GB1084542A (en) * 1963-04-01 1967-09-27 Perkin Elmer Ltd Magnets with high-homogeneity working gap
NL6700283A (fr) * 1967-01-07 1968-07-08
DE1907969A1 (de) * 1968-03-01 1969-09-25 Philips Nv Magnetsystem mit einem ringfoermigen permanenten Hauptmagnet mit einer Weicheisenober- und -unterplatte und einem Kern mit Hilfsmagnet
US3855498A (en) * 1973-11-01 1974-12-17 Us Navy Center-pole magnetic circuit
US3984725A (en) * 1975-05-19 1976-10-05 Varian Associates Permanent magnet structure for crossed-field tubes
CH612287A5 (fr) * 1975-05-22 1979-07-13 Bbc Brown Boveri & Cie

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1156815A (fr) * 1954-08-18 1958-05-21 Tesla Np Procédé pour limiter le flux magnétique dispersé dans les systèmes magnétiques à polarité constante et système magnétique pour l'application dudit procédé
FR1167248A (fr) * 1957-02-26 1958-11-21 Csf Perfectionnements aux aimants permanents
FR1501400A (fr) * 1965-12-06 1967-11-10 Gen Electric Perfectionnements apportés aux aimants composites en matières magnétiques différentes
US3768054A (en) * 1972-04-03 1973-10-23 Gen Electric Low flux leakage magnet construction
US4048542A (en) * 1975-04-25 1977-09-13 Tokyo Shibaura Electric Co., Ltd. Permanent magnets of different magnetic materials for magnetrons
FR2316710A1 (fr) * 1975-06-20 1977-01-28 Bosch Gmbh Robert Aimant segmentaire, procede pour sa fabrication et son utilisation
GB1528151A (en) * 1975-10-31 1978-10-11 English Electric Valve Co Ltd Permanent magnets

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2496337A1 (fr) * 1980-12-15 1982-06-18 Varian Associates Structure d'aimants permanents pour tubes electroniques a faisceau lineaire
EP0653096A4 (en) * 1992-07-27 1995-06-21 New York University High field magnets for medical applications.

Also Published As

Publication number Publication date
JPS6146961B2 (fr) 1986-10-16
IT7919359A0 (it) 1979-01-17
IT1110942B (it) 1986-01-13
CA1130371A (fr) 1982-08-24
FR2415352B1 (fr) 1986-11-21
IL55954A (en) 1982-08-31
GB2013036B (en) 1982-10-20
DE2901554C2 (fr) 1990-02-01
GB2013036A (en) 1979-08-01
JPS54113099A (en) 1979-09-04
DE2901554A1 (de) 1979-07-26
IL55954A0 (en) 1979-01-31
US4187444A (en) 1980-02-05

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Legal Events

Date Code Title Description
ST Notification of lapse