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GB748946A - Improvements in or relating to travelling wave apparatus - Google Patents

Improvements in or relating to travelling wave apparatus

Info

Publication number
GB748946A
GB748946A GB8393/53A GB839353A GB748946A GB 748946 A GB748946 A GB 748946A GB 8393/53 A GB8393/53 A GB 8393/53A GB 839353 A GB839353 A GB 839353A GB 748946 A GB748946 A GB 748946A
Authority
GB
United Kingdom
Prior art keywords
coils
tube
cylinder
magnetic
plate
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
GB8393/53A
Inventor
Douglas Cecil Rogers
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB8393/53A priority Critical patent/GB748946A/en
Priority to US407731A priority patent/US2851629A/en
Publication of GB748946A publication Critical patent/GB748946A/en
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]
    • 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
    • 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
    • H01J23/06—Electron or ion guns
    • H01J23/065—Electron or ion guns producing a solid cylindrical beam
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
    • H01J25/36—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field
    • H01J25/38—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field the forward travelling wave being utilised

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microwave Tubes (AREA)
  • Electron Sources, Ion Sources (AREA)

Abstract

748,946. Travelling-wave tubes. STANDARD TELEPHONES & CABLES, Ltd. March 26, 1953, No. 8393/53. Class 39 (1). A travelling-wave tube 1 is mounted within a focusing magnet assembly comprising a set of coils 19, 20, 21, 22, a pair of ferromagnetic end plates 10, 16 and a number of ferromagnetic tie rods. 18 extending between the end plates and forming a magnetic shield around the solenoids. The tie rods may be replaced by a cylinder of soft iron. The magnet assembly forms with the input and output waveguides 24, 34 a unit into which the tube may be readily inserted and withdrawn. The tube is mounted at the gun end on a plate 14 which is fixed by means of bolts and spacing collars 15 to the magnetic end plate 16. The base of the tube has a flange seating against a shoulder on the plate 14 and is locked in position by clips 43. The collector end of the tube carries a cooling assembly 7 and is insulatingly supported at 9 in the magnetic end plate 10. A cylinder 38 of ferromagnetic material secured to the end plate 16 surrounds the electron gun end of the tube. The electron gun comprises a magnetic cylinder 40 surrounding the cathode and constituting a pole-piece of the magnet assembly. The electron gun is designed as described in Specification 748,945 to give a parallel flow of electrons. The gun may be designed for the electrons to follow the magnetic field lines, the cylinder 38 being omitted. A rearward cylinder may however be provided to collect leakage flux. The arrangement of coils is designed to provide a magnetic field equivalent to that provided by an infinite number of identical equally spaced coils where the distance between coils is less than 0.7 coil diameter. This is stated to produce minimum variation of axial field. In practice the distance apart is less than 0.6 coil diameter and the end coils are wider than the remainder. Coils 20, 21 may be replaced by a single coil or by three coils and the coil 19 by two coils.
GB8393/53A 1953-03-26 1953-03-26 Improvements in or relating to travelling wave apparatus Expired GB748946A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB8393/53A GB748946A (en) 1953-03-26 1953-03-26 Improvements in or relating to travelling wave apparatus
US407731A US2851629A (en) 1953-03-26 1954-02-02 Travelling wave apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8393/53A GB748946A (en) 1953-03-26 1953-03-26 Improvements in or relating to travelling wave apparatus

Publications (1)

Publication Number Publication Date
GB748946A true GB748946A (en) 1956-05-16

Family

ID=32330212

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8393/53A Expired GB748946A (en) 1953-03-26 1953-03-26 Improvements in or relating to travelling wave apparatus

Country Status (2)

Country Link
US (1) US2851629A (en)
GB (1) GB748946A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956193A (en) * 1957-07-11 1960-10-11 Philips Corp Magnet system for travelling wave tubes
DE1916608A1 (en) * 1968-04-12 1969-11-06 Varian Associates Microwave tubes

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB869714A (en) * 1958-12-17 1961-06-07 Mullard Ltd Travelling-wave tubes
US3076116A (en) * 1959-09-21 1963-01-29 Eitel Mccullough Inc Klystron apparatus

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL62817C (en) * 1940-05-04
USRE22389E (en) * 1940-07-13 1943-11-02 Electron beam concentrating
US2658393A (en) * 1945-12-10 1953-11-10 John P Woods Mechanical tuning device
NL135247C (en) * 1946-10-22
US2619611A (en) * 1951-05-29 1952-11-25 Eitel Mccullough Inc Electron tube apparatus
US2797353A (en) * 1951-06-15 1957-06-25 Bell Telephone Labor Inc Traveling wave type electron discharge devices
US2629066A (en) * 1951-12-10 1953-02-17 Eitel Maccullough Inc Electron tube
US2741718A (en) * 1953-03-10 1956-04-10 Sperry Rand Corp High frequency apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956193A (en) * 1957-07-11 1960-10-11 Philips Corp Magnet system for travelling wave tubes
DE1916608A1 (en) * 1968-04-12 1969-11-06 Varian Associates Microwave tubes

Also Published As

Publication number Publication date
US2851629A (en) 1958-09-09

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