GB1430005A - Electron beam control - Google Patents

Electron beam control

Info

Publication number
GB1430005A
GB1430005A GB3029673A GB3029673A GB1430005A GB 1430005 A GB1430005 A GB 1430005A GB 3029673 A GB3029673 A GB 3029673A GB 3029673 A GB3029673 A GB 3029673A GB 1430005 A GB1430005 A GB 1430005A
Authority
GB
United Kingdom
Prior art keywords
region
field
value
magnetic field
cyclotron
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
GB3029673A
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.)
National Aeronautics and Space Administration NASA
Original Assignee
National Aeronautics and Space Administration NASA
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 National Aeronautics and Space Administration NASA filed Critical National Aeronautics and Space Administration NASA
Publication of GB1430005A publication Critical patent/GB1430005A/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
    • H01J23/027—Collectors
    • H01J23/0275—Multistage collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/58—Arrangements for focusing or reflecting ray or beam
    • H01J29/64—Magnetic lenses

Landscapes

  • Particle Accelerators (AREA)
  • Microwave Tubes (AREA)

Abstract

1430005 Discharge tubes NATIONAL AERONAUTICS & SPACE ADMINISTRATION 26 June 1973 [27 June 1972] 30296/73 Heading H1D The efficiency of collection of a spent electron beam in a microwave tube is increased by first radially expanding the beam from its value in the interaction region 10 of the tube, to decrease its current density e.g. to a value not exceeding 10 amps. cm.<SP>-2</SP>, by provision of a region 11 of smoothly decreasing magnetic field, and then maintaining the beam at a substantially constant diameter by a region 12 of uniform magnetic field of reduced intensity, and finally collecting the beam, in a region 19 of zero magnetic field, on a sequence of plates 34 to 37 of progressively more negative potential. The distance L over which beam expansion occurs should be in the range one to three cyclotron wavelengths in terms of the region 10 field, and the distance L 2 over which the beam radius is maintained constant should be a half to one cyclotron wavelengths, in terms of the region 12 field. The field in region 12 may be “ to <SP>1</SP>/ 10 th the value in region 10. The fields may be produced by solenoids, as shown, or by permanent magnets, or a periodic permanent magnet system. Reference is made to the possibility of using a single magnet with polepieces 25, 28, and 29 to produce the required field variation.
GB3029673A 1972-06-27 1973-06-26 Electron beam control Expired GB1430005A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US26683272A 1972-06-27 1972-06-27

Publications (1)

Publication Number Publication Date
GB1430005A true GB1430005A (en) 1976-03-31

Family

ID=23016174

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3029673A Expired GB1430005A (en) 1972-06-27 1973-06-26 Electron beam control

Country Status (9)

Country Link
US (1) US3764850A (en)
AU (1) AU472491B2 (en)
BE (1) BE801131A (en)
CA (1) CA979062A (en)
DE (1) DE2332118A1 (en)
FR (1) FR2191251B1 (en)
GB (1) GB1430005A (en)
IT (1) IT989490B (en)
NL (1) NL7308986A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2743108A1 (en) * 1976-10-04 1978-04-06 Litton Systems Inc MULTI-LEVEL RECESSED COLLECTOR
GB2251334A (en) * 1990-03-08 1992-07-01 Eev Ltd High frequency amplifying apparatus.
DE4431337A1 (en) * 1993-09-03 1995-03-09 Litton Systems Inc Inductive coupling tube with multi-stage brake field collector electrodes
US6380803B2 (en) 1993-09-03 2002-04-30 Litton Systems, Inc. Linear amplifier having discrete resonant circuit elements and providing near-constant efficiency across a wide range of output power
US6617791B2 (en) 2001-05-31 2003-09-09 L-3 Communications Corporation Inductive output tube with multi-staged depressed collector having improved efficiency
CN101704395B (en) * 2009-11-10 2010-10-06 上海百顺锁业有限公司 Hub-brake for electric vehicle

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4277721A (en) * 1979-09-07 1981-07-07 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Multistage depressed collector for dual mode operation
US4395656A (en) * 1980-12-24 1983-07-26 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Gyrotron transmitting tube
US4794303A (en) * 1987-01-22 1988-12-27 Litton Systems, Inc. Axisymmetric electron collector with off-axis beam injection
US5420478A (en) * 1993-02-12 1995-05-30 Litton Systems, Inc. Depressed collector for sorting radial energy level of a gyrating electron beam
US5780970A (en) * 1996-10-28 1998-07-14 University Of Maryland Multi-stage depressed collector for small orbit gyrotrons
US6552490B1 (en) * 2000-05-18 2003-04-22 Communications And Power Industries Multiple stage depressed collector (MSDC) klystron based amplifier for ground based satellite and terrestrial communications
US6777877B1 (en) * 2000-08-28 2004-08-17 Communication & Power Industries, Inc. Gun-only magnet used for a multi-stage depressed collector klystron
WO2011034985A1 (en) 2009-09-17 2011-03-24 Sciaky, Inc. Electron beam layer manufacturing
EP2555902B1 (en) 2010-03-31 2018-04-25 Sciaky Inc. Raster methodology for electron beam layer manufacturing using closed loop control
CN107132496B (en) * 2017-04-07 2018-06-05 韩小刚 The measuring method and device in micro- magnetic field
RU2706644C1 (en) * 2019-03-29 2019-11-19 Акционерное общество "Научно-производственное предприятие "Алмаз" (АО "НПП "Алмаз") Traveling-wave tube for linear amplifiers of communication satellite microwave power
RU2738394C1 (en) * 2020-04-24 2020-12-11 Акционерное общество "Научно-производственное предприятие "Алмаз" (АО "НПП "Алмаз") Traveling-wave tube of linearized microwave power amplifier

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE22389E (en) * 1940-07-13 1943-11-02 Electron beam concentrating
US2853641A (en) * 1955-01-20 1958-09-23 Gen Electric Electron beam and wave energy interaction device
FR1257796A (en) * 1960-02-25 1961-04-07 Csf High Power Velocity Modulated Tube Electron Collector
US3273006A (en) * 1962-02-01 1966-09-13 Raytheon Co Traveling wave tube having a contoured anode collecting surface
US3297907A (en) * 1963-06-13 1967-01-10 Varian Associates Electron tube with collector having magnetic field associated therewith, said field causing electron dispersion throughout the collector
US3450930A (en) * 1966-11-14 1969-06-17 Varian Associates Permanent magnet focused linear beam tube employing a compensating magnet structure between the main magnet and the beam collector

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2743108A1 (en) * 1976-10-04 1978-04-06 Litton Systems Inc MULTI-LEVEL RECESSED COLLECTOR
GB2251334A (en) * 1990-03-08 1992-07-01 Eev Ltd High frequency amplifying apparatus.
US5283534A (en) * 1990-03-08 1994-02-01 Eev Limited High frequency amplifying apparatus with a collector which has a periodic amplitude variable longitudinal magnetic field therein
GB2251334B (en) * 1990-03-08 1994-02-23 Eev Ltd High frequency amplifying apparatus
DE4431337A1 (en) * 1993-09-03 1995-03-09 Litton Systems Inc Inductive coupling tube with multi-stage brake field collector electrodes
US6380803B2 (en) 1993-09-03 2002-04-30 Litton Systems, Inc. Linear amplifier having discrete resonant circuit elements and providing near-constant efficiency across a wide range of output power
US6617791B2 (en) 2001-05-31 2003-09-09 L-3 Communications Corporation Inductive output tube with multi-staged depressed collector having improved efficiency
CN101704395B (en) * 2009-11-10 2010-10-06 上海百顺锁业有限公司 Hub-brake for electric vehicle

Also Published As

Publication number Publication date
IT989490B (en) 1975-05-20
CA979062A (en) 1975-12-02
BE801131A (en) 1973-10-15
FR2191251B1 (en) 1978-06-30
US3764850A (en) 1973-10-09
AU5728473A (en) 1975-01-09
AU472491B2 (en) 1976-05-27
NL7308986A (en) 1974-01-02
DE2332118A1 (en) 1974-01-17
FR2191251A1 (en) 1974-02-01

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Legal Events

Date Code Title Description
429A Application made for amendment of specification (sect. 29/1949)
429H Application (made) for amendment of specification now open to opposition (sect. 29/1949)
429D Case decided by the comptroller ** specification amended (sect. 29/1949)
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee