GB787181A - Improvements in or relating to travelling wave tubes - Google Patents

Improvements in or relating to travelling wave tubes

Info

Publication number
GB787181A
GB787181A GB18181/54A GB1818154A GB787181A GB 787181 A GB787181 A GB 787181A GB 18181/54 A GB18181/54 A GB 18181/54A GB 1818154 A GB1818154 A GB 1818154A GB 787181 A GB787181 A GB 787181A
Authority
GB
United Kingdom
Prior art keywords
cathode
magnetic
helix
inch
pole piece
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
GB18181/54A
Inventor
Douglas Cecil Rogers
Walter John Pohl
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
Priority to BE570152D priority Critical patent/BE570152A/xx
Priority to BE529619D priority patent/BE529619A/xx
Priority to NL200290D priority patent/NL200290A/xx
Priority to BE541462D priority patent/BE541462A/xx
Priority to BE532535D priority patent/BE532535A/xx
Priority to NL191459D priority patent/NL191459A/xx
Priority to BE539158D priority patent/BE539158A/xx
Priority to NL200402D priority patent/NL200402A/xx
Priority to BE527619D priority patent/BE527619A/fr
Priority to BE541278D priority patent/BE541278A/xx
Priority to NL230187D priority patent/NL230187A/xx
Priority to BE532534D priority patent/BE532534A/xx
Priority to BE527620D priority patent/BE527620A/xx
Priority to GB8391/53A priority patent/GB742070A/en
Priority claimed from GB839453A external-priority patent/GB755834A/en
Priority to GB28270/53A priority patent/GB766007A/en
Priority to GB28268/53A priority patent/GB762106A/en
Priority to GB28269/53A priority patent/GB762107A/en
Priority claimed from GB28268/53A external-priority patent/GB762106A/en
Priority to US407762A priority patent/US2797360A/en
Priority to US407732A priority patent/US2890370A/en
Priority to CH353817D priority patent/CH353817A/en
Priority to CH322461D priority patent/CH322461A/en
Priority to FR1098804D priority patent/FR1098804A/en
Priority to CH328589D priority patent/CH328589A/en
Priority to FR66255D priority patent/FR66255E/en
Priority to DEI8451A priority patent/DE1123773B/en
Priority to DEI8450A priority patent/DE1099093B/en
Priority to FR66226D priority patent/FR66226E/en
Priority to FR66266D priority patent/FR66266E/en
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to US447173A priority patent/US2824996A/en
Priority to US448816A priority patent/US2890371A/en
Priority to DEL19900A priority patent/DE1001360B/en
Priority to CH336509D priority patent/CH336509A/en
Priority to DEI9245A priority patent/DE1108336B/en
Priority to FR67269D priority patent/FR67269E/en
Priority to FR67270D priority patent/FR67270E/en
Priority to FR68751D priority patent/FR68751E/en
Priority to US502811A priority patent/US2871392A/en
Priority to CH334859D priority patent/CH334859A/en
Priority to DEI10339A priority patent/DE1109272B/en
Priority to FR68866D priority patent/FR68866E/en
Priority to US529818A priority patent/US2908843A/en
Priority to US530224A priority patent/US2918593A/en
Priority to GB25850/55A priority patent/GB787603A/en
Priority to FR69376D priority patent/FR69376E/en
Priority to FR69772D priority patent/FR69772E/en
Priority to GB16429/56A priority patent/GB799236A/en
Priority to FR70719D priority patent/FR70719E/en
Priority to GB713/57A priority patent/GB836219A/en
Priority to GB1147/57A priority patent/GB831514A/en
Priority to CH351679D priority patent/CH351679A/en
Priority to FR72041D priority patent/FR72041E/en
Publication of GB787181A publication Critical patent/GB787181A/en
Priority to FR755344A priority patent/FR73056E/en
Priority to FR755436A priority patent/FR73213E/en
Priority to FR772009A priority patent/FR73991E/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
    • H01J23/06—Electron or ion guns
    • H01J23/065—Electron or ion guns producing a solid cylindrical beam

Landscapes

  • Microwave Tubes (AREA)

Abstract

787,181. Travelling wave tubes. STANDARD TELEPHONES & CABLES, Ltd. June 17, 1955 [June 21,1954], No. 18181/54. Class 39(1). In a travelling wave tube provided with noise reducing means comprising at least two successive accelerating gaps in the gun followed by a field free " drift tube " connected between the final anode and helix, the magnetic focusing field is made divergent in the gun region so as to reduce the noise space charge waves still further. The divergent magnetic field is obtained by reversing the position of the magnetic pole piece 28 so that it projects forwardly instead of backwardly from the magnetic end plate 16, and the cathode is placed inside the pole piece tunnel one inch from the left hand end. The axial field is zero in the plane of the end plate due to the shielding effect of the pole piece and increases to a maximum at the right hand end of the pole piece tunnel, thereafter decreasing to a constant value along the helix. The magnetic field will therefore diverge from behind the cathode and become parallel at the right hand end of the pole piece. Alternatively the current in the first solenoid coil 17 can be made greater than in the remaining coils. The accelerating gaps are formed between cathode and anodes C, A 1 , A 2 , A 3 , Fig. 1, at D.C. potentials of 0, 55, 115 and 950 volts respectively, anode As being connected to one end of drift tube 7 which is of such length that its end adjacent the helix is a point of A.C. noise velocity minimum. 3 is a cathode shield electrode. The spacing between A 1 and A 2 is twice that between the cathode and A 1 but equal to the spacing between A 2 and A 3 . The probe 9, connected between " drift tube " 7 and helix 8, and about one turn of the helix, lie within input wave-guide 10. Focusing coils 17- 22 are clamped by tie bars 23 of magnetic material between magnetic end plates 14, 16. The magnetic field may vary from 600 gauss ¢ inch behind the cathode to 320-330 gauss 3 inches in front of the cathode, and the spacings of A1, A2 and A3 from the cathode are respectively 0À053 inch, 0À170 inch and 0À320 inch. A prior art arrangement is referred to in which the gun has two accelerating gaps to reduce noise as in the present invention but in which the magnetic field is uniform ; the potentials of the gun electrodes and beam current may be so adjusted that the beam diverges between the cathode and first anode, and this is stated to further reduce the noise by 2dB.
GB18181/54A 1953-03-20 1954-06-21 Improvements in or relating to travelling wave tubes Expired GB787181A (en)

Priority Applications (54)

Application Number Priority Date Filing Date Title
BE570152D BE570152A (en) 1953-03-26
BE529619D BE529619A (en) 1953-03-26
NL200290D NL200290A (en) 1953-03-26
BE541462D BE541462A (en) 1953-03-26
BE532535D BE532535A (en) 1953-03-26
NL191459D NL191459A (en) 1953-03-26
BE539158D BE539158A (en) 1953-03-26
NL200402D NL200402A (en) 1953-03-26
BE527619D BE527619A (en) 1953-03-20
BE541278D BE541278A (en) 1953-03-26
NL230187D NL230187A (en) 1953-03-26
BE532534D BE532534A (en) 1953-03-26
BE527620D BE527620A (en) 1953-03-26
GB8391/53A GB742070A (en) 1953-03-26 1953-03-26 Improvements in or relating to magnet assemblies which are long compared to their cross-sectional dimensions
GB28270/53A GB766007A (en) 1953-03-26 1953-10-14 Improvements in or relating to travelling wave tubes
GB28268/53A GB762106A (en) 1953-03-26 1953-10-14 Improvements in or relating to travelling wave tubes
GB28269/53A GB762107A (en) 1953-03-26 1953-10-14 Improvements in or relating to electron guns
US407762A US2797360A (en) 1953-03-26 1954-02-02 Travelling wave amplifiers
US407732A US2890370A (en) 1953-03-26 1954-02-02 Travelling wave tubes
CH353817D CH353817A (en) 1953-03-20 1954-03-22 Device for concentrating an electron beam passing through a tunnel-shaped space
CH322461D CH322461A (en) 1953-03-26 1954-03-22 Arrangement with a traveling wave tube
FR1098804D FR1098804A (en) 1953-03-26 1954-03-24 Structure of traveling wave amplifiers
CH328589D CH328589A (en) 1953-03-26 1954-03-25 Travelingwave tube circuit unit
FR66255D FR66255E (en) 1953-03-26 1954-03-26 Structure of traveling wave amplifiers
DEI8451A DE1123773B (en) 1953-03-26 1954-03-26 Magnetic focusing system for the bundled guidance of the electron beam of a travel time tube
DEI8450A DE1099093B (en) 1953-03-26 1954-03-26 Arrangement for coupling the helical delay line of a traveling wave tube to a waveguide
FR66226D FR66226E (en) 1953-03-26 1954-03-26 Structure of traveling wave amplifiers
FR66266D FR66266E (en) 1953-03-26 1954-04-24 Road signs or advertising signs
US447173A US2824996A (en) 1953-03-26 1954-08-02 Travelling wave tubes
US448816A US2890371A (en) 1953-03-26 1954-08-10 Travelling wave tubes
DEL19900A DE1001360B (en) 1953-03-26 1954-09-14 Coupling arrangement for traveling tubes
CH336509D CH336509A (en) 1953-03-26 1954-10-11 Traveling wave tube
DEI9245A DE1108336B (en) 1953-03-26 1954-10-12 Constructive structure of a traveling field spiral tube
FR67269D FR67269E (en) 1953-03-26 1954-10-13 Traveling wave amplifier structures
FR67270D FR67270E (en) 1953-03-26 1954-10-13 Structure of traveling wave amplifiers
FR68751D FR68751E (en) 1953-03-26 1954-10-14 Structure of traveling wave amplifiers
US502811A US2871392A (en) 1953-03-26 1955-04-21 Travelling wave tubes
CH334859D CH334859A (en) 1953-03-26 1955-05-25 Travelingwave amplifier
DEI10339A DE1109272B (en) 1953-03-26 1955-06-21 Arrangement with a low-noise traveling-field helical tube for amplifying very short electrical waves
FR68866D FR68866E (en) 1953-03-26 1955-06-21 Structure of traveling wave amplifiers
US529818A US2908843A (en) 1953-03-26 1955-08-22 Coupling arrangement for traveling wave tubes
US530224A US2918593A (en) 1953-03-26 1955-08-24 Traveling wave tubes
GB25850/55A GB787603A (en) 1953-03-26 1955-09-09 Coupling arrangement for travelling wave tubes
FR69376D FR69376E (en) 1953-03-26 1955-09-13 Structure of traveling wave amplifiers
FR69772D FR69772E (en) 1953-03-26 1955-09-16 Structure of traveling wave amplifiers
GB16429/56A GB799236A (en) 1953-03-26 1956-05-28 Improvements in or relating to electron discharge devices
FR70719D FR70719E (en) 1953-03-26 1956-06-01 Structure of traveling wave amplifiers
GB713/57A GB836219A (en) 1953-03-26 1957-01-08 Improvements in or relating to travelling wave tubes
GB1147/57A GB831514A (en) 1953-03-26 1957-01-11 Improvements in or relating to travelling wave tubes
CH351679D CH351679A (en) 1953-03-26 1957-05-24 Electron beam focusing device
FR72041D FR72041E (en) 1953-03-26 1957-05-27 Structure of traveling wave amplifiers
FR755344A FR73056E (en) 1953-03-26 1958-01-07 Structure of traveling wave amplifiers
FR755436A FR73213E (en) 1953-03-26 1958-01-08 Structure of traveling wave amplifiers
FR772009A FR73991E (en) 1953-03-26 1958-08-06 Structure of traveling wave amplifiers

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB839453A GB755834A (en) 1953-03-26 1953-03-26 Improvements in or relating to the coupling of a helix in a travelling wave tube or the like to a waveguide
GB328589X 1953-03-26
GB28268/53A GB762106A (en) 1953-03-26 1953-10-14 Improvements in or relating to travelling wave tubes

Publications (1)

Publication Number Publication Date
GB787181A true GB787181A (en) 1957-12-04

Family

ID=32398062

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18181/54A Expired GB787181A (en) 1953-03-20 1954-06-21 Improvements in or relating to travelling wave tubes

Country Status (1)

Country Link
GB (1) GB787181A (en)

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