IL42924A - High power beam tube - Google Patents

High power beam tube

Info

Publication number
IL42924A
IL42924A IL42924A IL4292473A IL42924A IL 42924 A IL42924 A IL 42924A IL 42924 A IL42924 A IL 42924A IL 4292473 A IL4292473 A IL 4292473A IL 42924 A IL42924 A IL 42924A
Authority
IL
Israel
Prior art keywords
collector
mouth
cavity
probe
electron
Prior art date
Application number
IL42924A
Other versions
IL42924A0 (en
Original Assignee
Varian Associates
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 Varian Associates filed Critical Varian Associates
Publication of IL42924A0 publication Critical patent/IL42924A0/en
Publication of IL42924A publication Critical patent/IL42924A/en

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
    • 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

Landscapes

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

Claims (8)

V ΛΤ I S C LA I MliU I S :
1. In a high power electron beam tube having a depres -lc beam collector: a thermionic cathode emitter means having a concave emitting surface for supplying thermionic electron emission a centrally apertured accelerating anode means spaced from said cathode emitter and shaped for drawing a convergent stream of electrons through said central aperture of said anode in a substantially non- intercepting manner to form a laminar flow electron beam of generally uniform current density taken transversely across the beam path; depressible collector means disposed at the terminal end of the beam path for collecting the electron beam, said collector having, an electrically conductive beam collector cavity with a constricted mouth portion for ingress of said beam into said cavity and for inhibiting egress of secondary and reflected ' electrons from said beam collector cavity, tapered conductive probe means axially disposed of said collector cavity, collector focusing means disposed at said mouth of said collector, and said collector focusing means and said probe means being formed and arranged for shaping the equipotentials :. iof the electron decelerating electric field at the mouth of said collector to maintain a generally laminar electron flow of uniform current density transversely across the decelerated beam at the mouth of said collector cavity in the presence of regions of space charged depression within said collector cavity, whereby the efficiency of said tube is substantially increased.
2. The apparatus of c mn J wherein aid tapered conductive probe axially of said collector to a terminating free end portion disposed approximately at the mouth of said collector cavity.
3. The apparatus of claim 1 wherein said cathode emitter has a generally spherically concave emitting surface, and wherein the decelerating electric field equipotential essentially at the mouth of said collector means is shaped by said collector focusing means and said probe means in the presence of space charge within said collector cavity to be approximately a mirror image of the corresponding equipotenti overlaying the emitting surface of said cathode emitter.
4. The apparatus of claim 1 wherein said conductive collector probe means includes a substantially conical free end portion with a half cone angle of less than 20°.
5. The apparatus of claim 4 wherein the one-half cone angle is approximately 9°.
6. The apparatus of claim 1 wherein said tapered means is hollow to accommodate a flow of fluid coolant therethrough .
7. The apparatus of claim 1 wherein the free end tip portion of said collector probe has a transverse cross-sectional area for interception of beam current which is less than 1% of the transverse cross -sectional area of said constricted mouth portion of said collector cavity.
8. The apparatus of claim 1 wherein the free end tip portion of said collector probe means terminates at the mouth of said collector just inside the collector cavity from the transverse plane of said mouth, and means for operating said probe at the same depressed potential as said beam collector cavity.
IL42924A 1972-08-24 1973-08-07 High power beam tube IL42924A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28343172A 1972-08-24 1972-08-24

Publications (2)

Publication Number Publication Date
IL42924A0 IL42924A0 (en) 1973-11-28
IL42924A true IL42924A (en) 1976-02-29

Family

ID=23086030

Family Applications (1)

Application Number Title Priority Date Filing Date
IL42924A IL42924A (en) 1972-08-24 1973-08-07 High power beam tube

Country Status (7)

Country Link
US (1) US3780336A (en)
JP (1) JPS5720656B2 (en)
CA (1) CA999332A (en)
DE (1) DE2341503A1 (en)
FR (1) FR2197228B1 (en)
GB (1) GB1389985A (en)
IL (1) IL42924A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2355902C2 (en) * 1973-11-08 1975-09-18 Siemens Ag, 1000 Berlin Und 8000 Muenchen Electron beam catcher for a cathode ray tube
DE2740227A1 (en) * 1977-09-07 1979-03-15 Schwerionenforsch Gmbh FARADAY CUP FOR MEASURING THE RAY FLOWS FROM A HEAVY ION ACCELERATOR
US4593259A (en) * 1983-07-27 1986-06-03 Varian Associates, Inc. Waveguide load having reflecting structure for diverting microwaves into absorbing fluid
US5025193A (en) * 1987-01-27 1991-06-18 Varian Associates, Inc. Beam collector with low electrical leakage
DE4211756A1 (en) * 1992-04-08 1993-10-14 Licentia Gmbh Electron beam tube for travelling wave tube or klystron - has electrode surrounding indentation and base section supporting indentation forming final collector stage
GB9311419D0 (en) * 1993-06-03 1993-07-28 Eev Ltd Electron beam tubes
US6429589B2 (en) 1999-04-16 2002-08-06 Northrop Grumman Corporation Oil-cooled multi-staged depressed collector having channels and dual sleeves
US6601641B1 (en) * 2000-03-31 2003-08-05 Thomcast Communications, Inc. Oil cooled multistage depressed collector high power amplifier
US6838829B2 (en) * 2002-01-03 2005-01-04 Calabatas Creek Research, Inc. Depressed collector for electron beams
FR2854728B1 (en) * 2003-05-06 2005-07-29 Thales Sa HYPERFREQUENCY TUBE WITH LOW PARASITIC RADIATION
US8872057B2 (en) * 2006-03-15 2014-10-28 Communications & Power Industries Llc Liquid cooling system for linear beam device electrodes

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2958804A (en) * 1958-05-19 1960-11-01 Eitel Mccullough Inc Electron beam tube and circuit
NL266512A (en) * 1960-09-20
US3368102A (en) * 1965-06-09 1968-02-06 Sperry Rand Corp Collector structure operating at a depressed potential for collecting a hollow electron beam
DE1541078B2 (en) * 1966-07-08 1975-01-02 Telefunken Patentverwertungsgesellschaft Mbh, 7900 Ulm Cathode ray tube with collecting electrode
US3453482A (en) * 1966-12-22 1969-07-01 Varian Associates Efficient high power beam tube employing a fly-trap beam collector having a focus electrode structure at the mouth thereof
FR1533674A (en) * 1967-08-04 1968-07-19 Siemens Ag Electron collector for electron beam tubes
US3644778A (en) * 1969-10-23 1972-02-22 Gen Electric Reflex depressed collector

Also Published As

Publication number Publication date
FR2197228B1 (en) 1978-09-08
DE2341503A1 (en) 1974-03-07
FR2197228A1 (en) 1974-03-22
CA999332A (en) 1976-11-02
US3780336A (en) 1973-12-18
IL42924A0 (en) 1973-11-28
GB1389985A (en) 1975-04-09
JPS49134264A (en) 1974-12-24
JPS5720656B2 (en) 1982-04-30

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