GB674758A - Improvements in or relating to electron discharge devices - Google Patents

Improvements in or relating to electron discharge devices

Info

Publication number
GB674758A
GB674758A GB21015/49A GB2101549A GB674758A GB 674758 A GB674758 A GB 674758A GB 21015/49 A GB21015/49 A GB 21015/49A GB 2101549 A GB2101549 A GB 2101549A GB 674758 A GB674758 A GB 674758A
Authority
GB
United Kingdom
Prior art keywords
tunnel
pole
focusing
gun
pieces
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
GB21015/49A
Inventor
Arnold Hugh William Beck
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
Publication of GB674758A publication Critical patent/GB674758A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/02—Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators
    • H01J25/10—Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator
    • H01J25/12—Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator with pencil-like electron stream in the axis of the resonators
    • 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
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
    • H01J3/02—Electron guns
    • H01J3/029—Schematic arrangements for beam forming

Landscapes

  • Electron Sources, Ion Sources (AREA)
  • Microwave Tubes (AREA)

Abstract

674,758. Electron beam apparatus. STANDARD TELEPHONES & CABLES, Ltd. Aug. 12, 1949, No. 21015/49. Class 39 (i). An arrangement for focusing a space charge limited electron beam 17 in a tunnel 9 in which the divergence of the beam is counteracted by an axial magnetic field, has electrostatic focusing of the beam so that it converges from the cathode 15 and is substantially parallel to the axis of the tunnel at the entrance 12 thereof and is substantially free from magnetic influence up to that point. The tunnel 9 is positioned between two pole-pieces 10, 11, the former being hollow and containing the cathode 15 and a focusing electrode 16, its inner surface acting as anode and forming an entrance tunnel of diameter d<SP>1</SP> and throat diameter d. Design of the electron gun gives the appropriate shape of beam, which is also obtainable by special guns having shaded pole-pieces. The diameter of tunnel 9 is larger than the entrance aperture d. The gun is shown applied to a two resonator klystron with drift tube 19 and resonant cavities 20, 21 each comprising a pair of discs, one 22 of nickel iron with a coefficient of expansion the same as glass and the other 23 of copper, the discs being clumped together by annular collars 24, 25. Tuning is by adjustable screws 26. Tubular extensions 30, 31 'are aligned with drift tube 19 to give interaction gaps 32, 33. Hollow pole-pieces 34, 35 house the electron gun and collector electrode respectively and are joined as a magnetic circuit by a permanent magnet 43 and yoke arms 44. The pole 34 is thick enough to screen the gun from the magnetic field. The focusing arrangement is similarly applied to a travelling wave tube, Fig. 4 (not shown), the helix being supported on quartz rods and fitted with probes and enclosed at each end by wave-guides. The magnetic circuit is completed as in Fig. 3. Beams of non-circular cross-section, e.g. rectangular, may be employed.
GB21015/49A 1949-08-12 1949-08-12 Improvements in or relating to electron discharge devices Expired GB674758A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB290724X 1949-08-12

Publications (1)

Publication Number Publication Date
GB674758A true GB674758A (en) 1952-07-02

Family

ID=10285729

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21015/49A Expired GB674758A (en) 1949-08-12 1949-08-12 Improvements in or relating to electron discharge devices

Country Status (5)

Country Link
US (2) US2829299A (en)
CH (1) CH290724A (en)
FR (1) FR1023956A (en)
GB (1) GB674758A (en)
NL (1) NL155290B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1004299B (en) * 1954-01-20 1957-03-14 Siemens Ag Electron wave tubes for amplifying very short waves
US2890371A (en) * 1953-03-26 1959-06-09 Int Standard Electric Corp Travelling wave tubes

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB748945A (en) * 1949-08-12 1956-05-16 Standard Telephones Cables Ltd Improvements in or relating to electron discharge tubes
US2814755A (en) * 1951-10-02 1957-11-26 Telefunken Gmbh Traveling wave electron discharge device
GB752452A (en) * 1953-03-24 1956-07-11 Emi Ltd Improvements in or relating to electron discharge devices
DE1014237B (en) * 1953-04-30 1957-08-22 Telefunken Gmbh Arrangement for coupling a high-frequency line to the helical line of a runway pipe
DE1114945B (en) * 1953-11-13 1961-10-12 Siemens Ag Arrangement with a run-time tube, in particular traveling-wave tubes
US2925508A (en) * 1955-07-28 1960-02-16 Sperry Rand Corp Electron beam focusing structure
US2993143A (en) * 1955-12-30 1961-07-18 High Voltage Engineering Corp Waveguide structure for microwave linear electron accelerator
US2943234A (en) * 1956-02-24 1960-06-28 Varian Associates Charged particle flow control apparatus
US2945154A (en) * 1957-01-18 1960-07-12 Sperry Rand Corp Travelling wave tube
DE1088160B (en) * 1957-02-23 1960-09-01 Standard Elektrik Lorenz Ag As a pole shoe serving as a collecting electrode for a traveling wave tube
US3008064A (en) * 1957-10-28 1961-11-07 Rauland Corp Cathode-ray tube
US3133227A (en) * 1958-06-25 1964-05-12 Varian Associates Linear particle accelerator apparatus for high energy particle beams provided with pulsing means for the control electrode
US2909691A (en) * 1958-10-17 1959-10-20 Heil Oskar Electron guns with magnetic focusing
US3172005A (en) * 1960-01-08 1965-03-02 Philips Corp Beam convergence in velocitymodulating valve
US3084279A (en) * 1960-02-10 1963-04-02 Raytheon Co Travelling wave devices
US3215890A (en) * 1961-05-22 1965-11-02 Zenith Radio Corp Electron gun structure for producing an electron beam free of radial velocity components wherein the length of the first non-magnetic cylinder is approximately equal to an integral number of wave lengths of the scallop frequency
NL282676A (en) * 1961-08-31
US3387167A (en) * 1964-11-06 1968-06-04 Varian Associates Linear beam microwave tube having pole caps providing a tapered magnetic field along the beam axis

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL61321C (en) * 1939-09-13
NL62817C (en) * 1940-05-04
USRE22389E (en) * 1940-07-13 1943-11-02 Electron beam concentrating
US2376707A (en) * 1941-04-05 1945-05-22 Robert E Mccoy Space discharge device
US2591350A (en) * 1947-04-26 1952-04-01 Raytheon Mfg Co Traveling-wave electron reaction device
US2579654A (en) * 1947-06-04 1951-12-25 Raytheon Mfg Co Electron-discharge device for microwave amplification
US2516944A (en) * 1947-12-18 1950-08-01 Philco Corp Impedance-matching device
US2524252A (en) * 1948-02-05 1950-10-03 Raytheon Mfg Co Electron accelerator of the microwave type
NL89376C (en) * 1950-06-17

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2890371A (en) * 1953-03-26 1959-06-09 Int Standard Electric Corp Travelling wave tubes
DE1004299B (en) * 1954-01-20 1957-03-14 Siemens Ag Electron wave tubes for amplifying very short waves

Also Published As

Publication number Publication date
US2829299A (en) 1958-04-01
CH290724A (en) 1953-05-15
USRE25070E (en) 1961-10-31
NL155290B (en)
FR1023956A (en) 1953-03-26

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