GB834958A - Improvements in or relating to magnetic focusing systems for travelling wave tubes - Google Patents

Improvements in or relating to magnetic focusing systems for travelling wave tubes

Info

Publication number
GB834958A
GB834958A GB7938/58A GB793858A GB834958A GB 834958 A GB834958 A GB 834958A GB 7938/58 A GB7938/58 A GB 7938/58A GB 793858 A GB793858 A GB 793858A GB 834958 A GB834958 A GB 834958A
Authority
GB
United Kingdom
Prior art keywords
members
projections
region
field
travelling wave
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
GB7938/58A
Inventor
Francis James Weaver
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.)
Teledyne UK Ltd
Original Assignee
English Electric Valve Co Ltd
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
Priority to NL100798D priority Critical patent/NL100798C/xx
Priority to NL237015D priority patent/NL237015A/xx
Application filed by English Electric Valve Co Ltd filed Critical English Electric Valve Co Ltd
Priority to GB7938/58A priority patent/GB834958A/en
Priority to US798212A priority patent/US2965782A/en
Priority to DEE17281A priority patent/DE1189206B/en
Priority to FR789210A priority patent/FR1222013A/en
Publication of GB834958A publication Critical patent/GB834958A/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

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

Abstract

834,958. Travelling wave tubes. ENGLISH ELECTRIC VALVE CO. Ltd. Dec. 11, 1958 [March 12, 1958], No. 7938/58. Class 39(1). A uniform spatial magnetic field is established in the region of the cathode, and an alternating spatial magnetic field is set up in the wave tube by means of permanent magnets 5, 6. . . (n-3), (n-2), Fig. 2. The magnets are arranged alternately so that the annular members 11 are uni-polar; they are shaped in such a manner as to produce magnet fields in delay winding space 2 contain delay helix 3 in alternate senses and alternatively relatively strong and weak. The diameters of the projections 14 on the members 11 slowly decrease to the diameter of projections 17 until the members assume the form of the members P in which region the field in the tube is of constant strength by alternating direction. The purpose of the variable positioning of the projections 14 is to compensate for the leakage field due to the field in the region of the electron gun.
GB7938/58A 1958-03-12 1958-03-12 Improvements in or relating to magnetic focusing systems for travelling wave tubes Expired GB834958A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL100798D NL100798C (en) 1958-03-12
NL237015D NL237015A (en) 1958-03-12
GB7938/58A GB834958A (en) 1958-03-12 1958-03-12 Improvements in or relating to magnetic focusing systems for travelling wave tubes
US798212A US2965782A (en) 1958-03-12 1959-03-09 Magnetic focusing systems for travelling wave tubes
DEE17281A DE1189206B (en) 1958-03-12 1959-03-11 Magnetic focusing system for the bundled guidance of the electron beam of a traveling wave tube
FR789210A FR1222013A (en) 1958-03-12 1959-03-12 Magnetic focusing device for traveling wave tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7938/58A GB834958A (en) 1958-03-12 1958-03-12 Improvements in or relating to magnetic focusing systems for travelling wave tubes

Publications (1)

Publication Number Publication Date
GB834958A true GB834958A (en) 1960-05-11

Family

ID=9842670

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7938/58A Expired GB834958A (en) 1958-03-12 1958-03-12 Improvements in or relating to magnetic focusing systems for travelling wave tubes

Country Status (5)

Country Link
US (1) US2965782A (en)
DE (1) DE1189206B (en)
FR (1) FR1222013A (en)
GB (1) GB834958A (en)
NL (2) NL237015A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114256040A (en) * 2021-12-23 2022-03-29 电子科技大学 Novel traveling wave tube slow wave structure

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3106659A (en) * 1959-03-24 1963-10-08 Kearfott Company Inc Microwave tube construction
US3259788A (en) * 1961-01-19 1966-07-05 Nippon Electric Co Magnetic focussing device for an electron tube
US3353056A (en) * 1964-04-24 1967-11-14 Gen Electric Electron beam focusing system including a magnetically permeable shield enclosing theelectron gun permanent magnet
GB1538430A (en) * 1975-04-03 1979-01-17 English Electric Valve Co Ltd Travelling wave tubes
FR2479558A1 (en) * 1980-04-01 1981-10-02 Thomson Csf PROGRESSIVE WAVE TUBE WITH COUPLED CAVITIES AND FOCUSING BY ALTERNATE PERMANENT MAGNETS, AND AMPLIFIER ASSEMBLY COMPRISING SUCH A TUBE
DE3015231A1 (en) * 1980-04-21 1981-10-22 Siemens AG, 1000 Berlin und 8000 München HIKING FIELD TUBES WITH PERIODIC-PERMANENT-MAGNETIC FOCUSING SYSTEM

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL95352C (en) * 1953-04-29
US2844754A (en) * 1953-04-29 1958-07-22 Bell Telephone Labor Inc Electron beam focusing system
US2867745A (en) * 1953-10-07 1959-01-06 Bell Telephone Labor Inc Periodic magnetic focusing system
NL198576A (en) * 1954-08-26
NL200862A (en) * 1954-10-04
BE545514A (en) * 1954-11-12
NL99653C (en) * 1956-03-01

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114256040A (en) * 2021-12-23 2022-03-29 电子科技大学 Novel traveling wave tube slow wave structure

Also Published As

Publication number Publication date
DE1189206B (en) 1965-03-18
NL100798C (en)
FR1222013A (en) 1960-06-07
NL237015A (en)
US2965782A (en) 1960-12-20

Similar Documents

Publication Publication Date Title
GB842531A (en) Permanent magnets
GB1039576A (en) Improvements in or relating to permanent magnet systems
GB834958A (en) Improvements in or relating to magnetic focusing systems for travelling wave tubes
GB785110A (en) Electron tube magnetic focusing device
GB1462463A (en) Magnetic structure for focusing of linear beams
GB945610A (en) Velocity modulated discharge devices with magnetic beam focusing
GB670021A (en) Improvements in beam centering devices for cathode ray tubes
GB865725A (en) Improvements in or relating to magnetic focusing systems for travelling-wave tubes
GB875979A (en) Improvements in or relating to means for positioning electron beams in electron discharge devices
GB1102719A (en) Improvements in or relating to electron beam periodic magnetic focussing systems
GB987024A (en) A magnetic focussing device for an electron tube
GB1077412A (en) Cathode-ray tube beam controlling device
GB1049920A (en) High frequency electron discharge device having improved permanent magnetic focusing
US3375400A (en) Radial magnet beam focusing system
GB770133A (en) Improvements in or relating to permanent magnets
GB748946A (en) Improvements in or relating to travelling wave apparatus
GB947960A (en) Improvements in or relating to periodic permanent magnetic focusing systems for electron beam discharge tubes
GB845000A (en) Traveiling-wave tubes
GB792020A (en) Improvements in or relating to the magnetic focusing of electron beams
GB918016A (en) Improvements in or relating to magnetic-focusing systems for travelling wave tubes
GB783603A (en) Improvements in or relating to magnet arrangements
GB1192484A (en) Improved Magnetic Focusing Systems for Discharge Tubes
GB1270145A (en) Magnetic beam-focusing system
GB931808A (en) Improvements in magnetic systems for travelling wave-tubes
GB918731A (en) Magnetic-focusing systems for travelling-wave tubes