GB1192484A - Improved Magnetic Focusing Systems for Discharge Tubes - Google Patents

Improved Magnetic Focusing Systems for Discharge Tubes

Info

Publication number
GB1192484A
GB1192484A GB01851/68A GB1185168A GB1192484A GB 1192484 A GB1192484 A GB 1192484A GB 01851/68 A GB01851/68 A GB 01851/68A GB 1185168 A GB1185168 A GB 1185168A GB 1192484 A GB1192484 A GB 1192484A
Authority
GB
United Kingdom
Prior art keywords
travelling wave
sleeve
discharge tubes
improved magnetic
magnetic focusing
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
GB01851/68A
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Publication of GB1192484A publication Critical patent/GB1192484A/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

Landscapes

  • Particle Accelerators (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

1,192,484. Travelling wave tubes. THOMSON-CSF. 11 March, 1968 [14 March, 1967], No. 11851/68. Heading H1D. In a periodic permanent magnet focusing system-eg. for a travelling wave tube-having axially magnetized ferrite members 5 and polepieces 6, the reduction of focusing field with temperature increase due to the temperature dependence of the ferrite material is compensated by the use of an inner sleeve 4, within which the travelling wave tube envelope may be received, the sleeve shunting the surrounding focusing system, and being of a material the induction of which decreases with increase of temperature in such a manner as to maintain the focusing field at the axis substantially constant. The material of sleeve 4 may be 25% to 35% nickel and 75% to 65% iron.
GB01851/68A 1967-03-14 1968-03-11 Improved Magnetic Focusing Systems for Discharge Tubes Expired GB1192484A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR98694A FR1522411A (en) 1967-03-14 1967-03-14 Compensation for the effects of temperature in magnetic focusers

Publications (1)

Publication Number Publication Date
GB1192484A true GB1192484A (en) 1970-05-20

Family

ID=8626872

Family Applications (1)

Application Number Title Priority Date Filing Date
GB01851/68A Expired GB1192484A (en) 1967-03-14 1968-03-11 Improved Magnetic Focusing Systems for Discharge Tubes

Country Status (5)

Country Link
US (1) US3509504A (en)
DE (1) DE1616401A1 (en)
FR (1) FR1522411A (en)
GB (1) GB1192484A (en)
NL (1) NL6803518A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3755706A (en) * 1972-03-20 1973-08-28 Varian Associates Miniaturized traveling wave tube
CN106756601B (en) * 2016-12-01 2018-10-26 重庆材料研究院有限公司 It is a kind of width temperature range, high linearity magnetic temperature compensating alloy

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE523425A (en) * 1952-04-08 1900-01-01
US2867745A (en) * 1953-10-07 1959-01-06 Bell Telephone Labor Inc Periodic magnetic focusing system
GB785110A (en) * 1955-06-28 1957-10-23 Standard Telephones Cables Ltd Electron tube magnetic focusing device
US3061754A (en) * 1960-03-18 1962-10-30 Gen Precision Inc Temperature compensating element for a traveling wave tube periodic array
US3178602A (en) * 1960-12-30 1965-04-13 Gen Precision Inc Adjustable permanent magnet focusing array
FR1293571A (en) * 1961-04-04 1962-05-18 Csf Further development of alternating magnet focusing systems for traveling wave tubes

Also Published As

Publication number Publication date
US3509504A (en) 1970-04-28
DE1616401A1 (en) 1971-04-15
FR1522411A (en) 1968-04-26
NL6803518A (en) 1968-09-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees