GB790405A - Velocity-modulated electron tube apparatus - Google Patents

Velocity-modulated electron tube apparatus

Info

Publication number
GB790405A
GB790405A GB23086/54A GB2308654A GB790405A GB 790405 A GB790405 A GB 790405A GB 23086/54 A GB23086/54 A GB 23086/54A GB 2308654 A GB2308654 A GB 2308654A GB 790405 A GB790405 A GB 790405A
Authority
GB
United Kingdom
Prior art keywords
tube
main magnetic
copper
end plate
drift
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
GB23086/54A
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.)
Varian Medical Systems Inc
Original Assignee
Eitel Mccullough Inc
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 Eitel Mccullough Inc filed Critical Eitel Mccullough Inc
Publication of GB790405A publication Critical patent/GB790405A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/02Tubes 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
    • H01J25/10Klystrons, 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
    • H01J25/12Klystrons, 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

Landscapes

  • Microwave Tubes (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

790,405. Velocity modulated tubes. EITEL-McCULLOUGH, Inc. Aug. 9, 1954 [Dec. 14, 1953], No. 23086/54. Class 39(1). A magnetic lens is provided adjacent the electron gun of a velocitymodulated tube to control the diameter of the electron beam and to guide the beam axially into the field of the main magnetic circuit. The tube shown in Fig. 1 is a threecavity klystron power amplifier comprising an electron gun 2, drift tube sections 4, 6, 7 and 8 resonators 13, 14 and 16, and a collector assembly 3. The electron gun 2 comprises a cathode 17 and focusing electrode 21 mounted on a stem 22 which is brazed to a cupshaped anode 18 of non-magnetic material, preferably copper. The drift tube sections 4, 6, 7 and 8 are preferably made of copper and form side walls of the tube envelope, the gaps between the sections being bridged by the cavity resonators 13, 14 and 16, each comprising a cylinder 38 of insulating material, preferably ceramic, sealed to flanges 39 on copper end walls 36 which are brazed to the drift tube sections. Drift tube section 4 is brazed around an aperture in the anode 18 and provides an elongated neck between the gun 2 and the resonator 13. Water jackets 42, 43, 44 and 46 are provided, or may be omitted for lower power tubes. An end disc 47 for the jacket 46 also serves as a mounting flange for the tube. The collector assembly 3 comprises a cup-shaped electrode 24, preferably of copper, connected to drift'tube section 8 by a glass wall 26 seated between flanges 27, and surrounded by a water jacket 28 having inlet and outlet connections 29 and 31. A tubular projection 32 directs the water along the surface of the collector electrode 24, which carries a metal exhaust tubulation 33. Fig. 2 shows the tube mounted in conjunction with the main magnetic circuit, the magnetic lens, and external resonator extensions. The main magnetic circuit comprises a frame of magnetic material such as iron having upper and lower squareshaped end plates 51 and 52 with cut-off corners which are connected by four side members 53. Two coils 48 are supported by brackets 56 connected to the side members 53 by screws 57 sliding in slots 58 for adjustment purposes. A third coil 49 surrounds a collar 54 projecting from the lower end plate 52. The tube is inserted through an aperture in the upper end plate'51 so that the mounting flange 47 seats on the collar 54 and the aperture is then closed by a split ring 24 so that the end plate 51 shields the electron gun from the main magnetic circuit. A magnetic lens 59, provided about the elongated neck of the tube, guides the electron beam axially into the main magnetic field and also serves to focus the beam. The lens 59 comprises a coil 61 housed in a split disc and cup 62 and 63 of magnetic material, such as iron supported by flanged posts 64 and screws 66 passing through oversize holes 67 in the end plate 51 to permit transverse adjustment. The external resonator extensions 68 are rectangular box-like metal structures comprising two halves locked together by hasps 71. Resilient contact strips 69 engage the tube resonator walls 36. A rectangular tuning plunger 72 operated by a rod 73 is positioned in each half of the external resonator, and coupling to the input and output resonators may be made in any conventional manner through the side walls of the external resonator structures. Permanent magnets may be used in place of the coils 48 and 49. Specification 790,406 is referred to.
GB23086/54A 1953-12-14 1954-08-09 Velocity-modulated electron tube apparatus Expired GB790405A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US397977A US2867746A (en) 1953-12-14 1953-12-14 Electron tube apparatus

Publications (1)

Publication Number Publication Date
GB790405A true GB790405A (en) 1958-02-12

Family

ID=23573479

Family Applications (2)

Application Number Title Priority Date Filing Date
GB23086/54A Expired GB790405A (en) 1953-12-14 1954-08-09 Velocity-modulated electron tube apparatus
GB34808/56A Expired GB790406A (en) 1953-12-14 1954-08-09 Velocity-modulated electron tube apparatus

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB34808/56A Expired GB790406A (en) 1953-12-14 1954-08-09 Velocity-modulated electron tube apparatus

Country Status (3)

Country Link
US (1) US2867746A (en)
CH (1) CH343539A (en)
GB (2) GB790405A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3169206A (en) * 1959-08-06 1965-02-09 Varian Associates High frequency tube method and apparatus
US3076116A (en) * 1959-09-21 1963-01-29 Eitel Mccullough Inc Klystron apparatus
US3227581A (en) * 1960-02-23 1966-01-04 Eitel Mccullough Inc Process for rendering ceramics slightly conductive
JPS5868846A (en) * 1981-10-07 1983-04-23 バリアン・アソシエイツ・インコ−ポレイテツド Linear beam microwave tube focused by permanent magnet
CN101521133B (en) * 2009-04-20 2011-04-06 无锡希恩电气有限公司 Focusing coil for klystron

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE22389E (en) * 1940-07-13 1943-11-02 Electron beam concentrating
NL135247C (en) * 1946-10-22
US2581657A (en) * 1950-07-26 1952-01-08 Myron R Heppner Focusing and centering device for cathode-ray tubes
US2568668A (en) * 1950-08-18 1951-09-18 Best Mfg Co Inc Cathode-ray tube focusing device of the permanent magnet type
US2619611A (en) * 1951-05-29 1952-11-25 Eitel Mccullough Inc Electron tube apparatus
US2629066A (en) * 1951-12-10 1953-02-17 Eitel Maccullough Inc Electron tube

Also Published As

Publication number Publication date
GB790406A (en) 1958-02-12
US2867746A (en) 1959-01-06
CH343539A (en) 1959-12-31

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