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US3612934A - Collector for electron tubes - Google Patents

Collector for electron tubes Download PDF

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Publication number
US3612934A
US3612934A US20208A US3612934DA US3612934A US 3612934 A US3612934 A US 3612934A US 20208 A US20208 A US 20208A US 3612934D A US3612934D A US 3612934DA US 3612934 A US3612934 A US 3612934A
Authority
US
United States
Prior art keywords
collector
sleeve
tube
bars
envelope
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 - Lifetime
Application number
US20208A
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English (en)
Inventor
Dominique Henry
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Application granted granted Critical
Publication of US3612934A publication Critical patent/US3612934A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J23/027—Collectors

Definitions

  • the present invention relates to electron tubes and more particularly to travelling-wave tubes.
  • Such tubes generally comprise a cylindrical evacuated envelope inside which the various components of the tube are mounted, while means are provided for coupling the tube to the input and output circuits.
  • the collector which collects the electron beam once it has propagated through the tube. Except for the losses and for the energy fraction which is converted into the high-frequency energy, the whole of the energy of the beam is collected by the collector. This energy is currently in the order of several watts, even in the smallest models.
  • the collector a part of the envelope, the latter in this case being made up of two metal parts insulated from one another.
  • This arrangement facilitates the dissipation of the power received by the collector, but complicates the manufacture of the tube: as a matter of fact, the forward part of the envelope, that is to say that containing the electron gun and the delay line, is usually at the potential of the delay line itself, that is to say the highest potential in the tube, while the collector part is at a lower potential in order to decelerate the electrons prior to their impact on the collector.
  • the potentials concerned are for example 3,000 v., and 1,500 v., respectively.
  • the forward part of the envelope is earthed.
  • the collector is surrounded by a sleeve or jacket, which is also earthed.
  • the collector is always located inside either the envelope proper or a jacket or sleeve surrounding the envelope.
  • an electron tube portion comprising an elongated collector for collecting electrons at the end of their trajectory, a sleeve surrounding said collector and spaced apart therefrom, bars of insulating material interposed between said collector and said sleeve, and an intermediate member having two ends, to one end of which said sleeve is fixed and the other end of which is arranged for connection to another portion of said tube.
  • FIGS. 1 and 2 show schematically in axial section that part of the travelling-wave tube to which the invention relates, as it appears in known tubes.
  • FIGS. 3 and 3a show enlarged sectional views of the same part of a travelling-wave tube, modified in accordance with the invention.
  • the collector 12 is located inside the envelope 13 of a travelling-wave tube, opposite the end of a helical delay line through which the electron beam propagates in the direction of the arrow 11.
  • the envelope 13 is made of metal in the zone illustrated. The collector forms a part of the envelope in the arrangement of FIG. 2.
  • the collector 12 is brought through lead 12 to a negative potential in relation to the envelope 13 and to the helical delay line 10. The latter is at a high potential and the envelope is grounded, as the FIGS. show.
  • the collector 12 is insulated from the envelope 13 by the insulating body 12" (FIG. 1) or by the insulating ring 14 (FIG. 2).
  • the collector 12 is surrounded by a metal sleeve 15 which is also earthed; an insulating body, for example a ceramic ring 16, is placed between the collector 12 and the sleeve l5.
  • FIGS. 3 and 3a illustrate an embodiment of the invention; these FIGS. are limited to that portion of the tube to which the invention applies, that is to say the portion comprising the collector 12 and the neighboring part of the envelope.
  • FIGS. show the collector 30 and a sleeve 31 forming part of the tube envelope and made of a material exhibiting good thermal conductivity, both parts being cylindrical and being disposed concentrically around the tube axis XX
  • the sleeve 31 is attached in vacuumtight fashion, for example by welding or brazing, to a component 32 to which there is also attached in vacuumtight fashion the remainder of the tube (the latter not having been shown since it forms no part of the present invention).
  • the assembling takes place in the following manner:
  • Contiguous rods 34 for example of alumina, are deposited around the collector 30 as shown in FIG. 3a, these rods 34 rest within a shoulder 30' formed in the collector 30.
  • the rods 34 are held in position by temporary fixings, for example collars, at two or three points.
  • the dimensions of the subassembly thus formed are such that it can be only force-fitted into the sleeve 31.
  • the latter is, for example, of stainless steel and the subassembly is inserted therein coaxially therewith, for example by means of an appropriate press, the temporary fixings referred to earlier being removed progressively.
  • the intermediate member 32 is also force-fitting into the sleeve until its end rests on the shoulder 32. In the final position, the space 35 between the collector 30 and the intermediate member 32 is reduced to the minimum necessary for avoiding any risk of flash, in order to reduce to a minimum the electronic lens effect between these two components. Subsequently, the member 32 is welded to the sleeve 31, for example by electron bombardment.
  • the rods 34 are trapped between the sleeve 31, with which they are in contact along their generatrices, and the collector 30 into which they penetrate to a certain extent, the collector 30 being of softer metal than the sleeve 31.
  • the metals of which the collector 30 and the sleeve 31 are made are furthermore chosen to have such respective coefficients of thermal expansion that this cold weld effect is not modified by the heat treatments to which the tube is subjected during its manufacture, for example the baking operations at 400 to 450 C, which are the maximum temperatures reached during manufacture.
  • An electron tube portion comprising an elongated collector for collecting electrons at the end of their trajectory, a sleeve surrounding said collector and spaced apart therefrom, bars of insulating material interposed between said collector and said sleeve and an intermediate member having two ends to one end of which said sleeve is fixed and the other end of which is arranged for connection to the portion of said tube wherein said electrons propagate.

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  • Microwave Tubes (AREA)
US20208A 1969-03-28 1970-03-17 Collector for electron tubes Expired - Lifetime US3612934A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6909365A FR2038785A5 (ru) 1969-03-28 1969-03-28

Publications (1)

Publication Number Publication Date
US3612934A true US3612934A (en) 1971-10-12

Family

ID=9031497

Family Applications (1)

Application Number Title Priority Date Filing Date
US20208A Expired - Lifetime US3612934A (en) 1969-03-28 1970-03-17 Collector for electron tubes

Country Status (5)

Country Link
US (1) US3612934A (ru)
JP (1) JPS4922349B1 (ru)
DE (1) DE2014543C3 (ru)
FR (1) FR2038785A5 (ru)
GB (1) GB1238822A (ru)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4840595A (en) * 1986-08-29 1989-06-20 Siemens Aktiengesellschaft Electron beam catcher for velocity modulated electron tubes
US5025193A (en) * 1987-01-27 1991-06-18 Varian Associates, Inc. Beam collector with low electrical leakage
US5436525A (en) * 1992-12-03 1995-07-25 Litton Systems, Inc. Highly depressed, high thermal capacity, conduction cooled collector
US6130639A (en) * 1997-01-27 2000-10-10 Thomson-Csf Method for fine modelling of ground clutter received by radar
US6291935B1 (en) * 1997-11-14 2001-09-18 Nec Corporation Collector structure having a loss ceramic member
US6483243B1 (en) 1998-12-23 2002-11-19 Thomson Tubes Electroniques Multiband travelling wave tube of reduced length capable of high power functioning

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4558257A (en) * 1983-12-23 1985-12-10 English Electric Valve Company, Limited Travelling wave tube arrangements
EP0258667A1 (de) * 1986-08-29 1988-03-09 Siemens Aktiengesellschaft Elektronenstrahlauffänger für Laufzeitröhren
EP0276933A1 (en) * 1987-01-27 1988-08-03 Varian Associates, Inc. Beam collector with low electrical leakage
EP0361047B1 (de) * 1988-09-30 1995-11-22 Thomson Tubes Electroniques Wanderfeldröhre
US8545602B2 (en) 2007-05-18 2013-10-01 Exxonmobil Research And Engineering Company Removal of CO2, N2, and H2S from gas mixtures containing same
EA022563B1 (ru) 2007-05-18 2016-01-29 Эксонмобил Рисерч Энд Инджиниринг Компани Способ удаления целевого газа из смеси газов
US8529663B2 (en) 2007-05-18 2013-09-10 Exxonmobil Research And Engineering Company Process for removing a target gas from a mixture of gases by swing adsorption
US8529662B2 (en) 2007-05-18 2013-09-10 Exxonmobil Research And Engineering Company Removal of heavy hydrocarbons from gas mixtures containing heavy hydrocarbons and methane
US8444750B2 (en) 2007-05-18 2013-05-21 Exxonmobil Research And Engineering Company Removal of CO2, N2, or H2S from gas mixtures by swing adsorption with low mesoporosity adsorbent contactors
US7959720B2 (en) 2007-05-18 2011-06-14 Exxonmobil Research And Engineering Company Low mesopore adsorbent contactors for use in swing adsorption processes
EP2164601B1 (en) 2007-05-18 2016-10-05 ExxonMobil Research and Engineering Company Process for removing a target gas from a mixture of gases by thermal swing adsorption

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2827589A (en) * 1952-05-17 1958-03-18 Bell Telephone Labor Inc Electron discharge device
US3453473A (en) * 1968-01-02 1969-07-01 Hughes Aircraft Co Electron gun having electrode cup in ceramic cavity

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2827589A (en) * 1952-05-17 1958-03-18 Bell Telephone Labor Inc Electron discharge device
US3453473A (en) * 1968-01-02 1969-07-01 Hughes Aircraft Co Electron gun having electrode cup in ceramic cavity

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4840595A (en) * 1986-08-29 1989-06-20 Siemens Aktiengesellschaft Electron beam catcher for velocity modulated electron tubes
US5025193A (en) * 1987-01-27 1991-06-18 Varian Associates, Inc. Beam collector with low electrical leakage
US5436525A (en) * 1992-12-03 1995-07-25 Litton Systems, Inc. Highly depressed, high thermal capacity, conduction cooled collector
US6130639A (en) * 1997-01-27 2000-10-10 Thomson-Csf Method for fine modelling of ground clutter received by radar
US6291935B1 (en) * 1997-11-14 2001-09-18 Nec Corporation Collector structure having a loss ceramic member
US6670760B2 (en) 1997-11-14 2003-12-30 Nec Microwave Tube, Ltd. Collector structure of traveling wave tube having a lossy ceramic member
US6483243B1 (en) 1998-12-23 2002-11-19 Thomson Tubes Electroniques Multiband travelling wave tube of reduced length capable of high power functioning

Also Published As

Publication number Publication date
DE2014543A1 (de) 1970-10-08
DE2014543B2 (de) 1978-09-28
DE2014543C3 (de) 1979-05-23
JPS4922349B1 (ru) 1974-06-07
FR2038785A5 (ru) 1971-01-08
GB1238822A (ru) 1971-07-14

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