US2547061A - Multiple gap velocity modulation tube - Google Patents

Multiple gap velocity modulation tube Download PDF

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Publication number
US2547061A
US2547061A US772623A US77262347A US2547061A US 2547061 A US2547061 A US 2547061A US 772623 A US772623 A US 772623A US 77262347 A US77262347 A US 77262347A US 2547061 A US2547061 A US 2547061A
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United States
Prior art keywords
resonator
gap
velocity
gaps
beam path
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Expired - Lifetime
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US772623A
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English (en)
Inventor
Touraton Emile
Zwobada Rene
Gratzmuller Anne-Marie
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International Standard Electric Corp
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International Standard Electric Corp
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    • 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

Definitions

  • Electrode E1 has a shape and a potential suitable for effecting a desired spreading or the electron beam.
  • the power furnished to the beam is U2 'ILVE TMZUZ R which is n1 times -greater than when multiple gaps are used.
  • the power given up by the beam to the cavity is mm2 times greater than if the beam was braked only once by the high frequency -eld.
  • the gain, when used as an amplifier, is accordingly multiplied by nmz.
  • This device may also be used in a frequency multiplier tube.
  • the output voltage U2, ci a resonator excited by an electron stream velocity modulated by an input resonator and bunched in a drift space varies with the distance along th-e path of the stream at which the output resonator is excited by the stream. This variation is in accordance with the Bessel function or" the fundamental component of the modulated current.
  • s is the distance from the modulation space or gap to the catching space at which the output voltage U2 is excited in the output resonator
  • vo is the mean velocity of the electron in the drift space of distance s
  • U1 is the modulation voltage
  • U0 is the potential of the electrode E1 about the drift space.
  • the gaps are grouped in such a way as to correspond to points situated in the vicinity of the maximum of the Bessel function.
  • a velocity modulation electron discharge device comprising a source of an electron beam and a collector electrode deiining a beam path, a cavity resonator disposed about said beam path adjacent said source for velocity modulating electrons in the beam, said modulating resonator including a wave guide of rectangular section and masses of parallelepiped shape located along the beam path inside said guide and supported alternately on opposite sides of said guide, said masses being provided with apertures for passage of the beam therethrough, said masses defining therebetween a plurality of gaps along the beam path for permitting an eiectromagnetic field developed in said resonator to velocity modulate the electrons in the beam successively at each said gap, and a cavity resonator disposed about said beam path adjacent :aid collector electrode for extracting ultra high frequency energy from the velocity-modulated electron beam, said extracting resonator being provided with gap for permitting the electron beam to supply energy to an electromagnetic field developed in said extracting resonator.
  • energy extracting cavity resonator comprises a wave guide of rectangular section and masses of parallelepiped shape located along the beam path inside said guide and supported alternately on opposite sides of said guide, said masses being provided with apertures for passage of the electron beam therethrough, said masses defining therebetween a plurality of gaps along said beam path for permitting an electromagnetic rleld developed in said resonator to eX- tract energy from the electrons in the beam successively at each said gap.
  • a velocity modulation electron discharge device comprising a source of an electron beam and a collector electrode defining a beam path, a cavity resonator disposed about said beam path adjacent said source for velocity modulating electrons in the beam, and a cavity resonator disposed about said beam path adjacent said collector electrode for extracting ultra high frequency energy from the velocity-modulated electron beam, said extracting resonator including a wave guide of rectangular section and masses of parallelepiped shape located along the beam path inside said guide and supported alternately on opposite sides of said guide, said masses being provided with apertures for passage of the beam therethrough, said masses defining a plurality of gaps along the beam path for permitting the velocity-modulated electron beam to supply energy to an electromagnetic eld developed in said resonator successively at each said gap.
  • a velocity modulation electron discharge device comprising an electron beam source and a collector electrode defining a beam path, a cavity resonator disposed about said beam path adjacent said beam source for velocity modulating electrons in said beam, and a cavity resonator disposed about said beam path adjacent said collector electrode for extracting energy from the velocity modulated electron beam, each of said cavity resonators having means for communication with said electron path, one of said resonators including a Wave-guide section with masses spaced apart along the beam path inside ⁇ said guide and supported alternately on opposite sides of said guide, said masses having apertures for passage of the beam therethrough.

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  • Microwave Tubes (AREA)
US772623A 1945-12-17 1947-09-08 Multiple gap velocity modulation tube Expired - Lifetime US2547061A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR922150T 1945-12-17

Publications (1)

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US2547061A true US2547061A (en) 1951-04-03

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BE (1) BE481272A (is")
FR (1) FR922150A (is")

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2754448A (en) * 1950-06-21 1956-07-10 Hartford Nat Bank & Trust Co Velocity modulation tube of the kind comprising a drift space
US2758245A (en) * 1950-12-14 1956-08-07 Varian Associates Beam type electronic tube
US2857549A (en) * 1952-08-01 1958-10-21 Int Standard Electric Corp Electron velocity modulation tubes
US2918599A (en) * 1953-02-27 1959-12-22 Int Standard Electric Corp Electron velocity modulation tubes
US2974252A (en) * 1957-11-25 1961-03-07 Bell Telephone Labor Inc Low noise amplifier
US3012170A (en) * 1958-08-29 1961-12-05 Eitel Mccullough Inc Charged particle beam modulating means and method
US3043986A (en) * 1956-03-16 1962-07-10 Commissariat Energie Atomique Particle accelerators
US3067359A (en) * 1958-05-05 1962-12-04 Commissariat Energie Atomique Structure for linear ion accelerators
US3076117A (en) * 1959-04-27 1963-01-29 Gen Electric Parametric energy converter
US3107313A (en) * 1959-10-30 1963-10-15 Johann R Hechtel Velocity modulated electron tube with cathode means providing plural electron streams
US3274430A (en) * 1963-08-01 1966-09-20 Massachusetts Inst Technology Biased-gap klystron
US3392300A (en) * 1964-11-12 1968-07-09 Thomson Houston Comp Francaise Hollow-beam electron gun with a control electrode
DE1290634B (de) * 1961-03-07 1969-03-13 Siemens Ag Elektronenstrahlroehre mit Geschwindigkeitsmodulation
US4284923A (en) * 1978-11-23 1981-08-18 Commissariat A L'energie Atomique Ion beam buncher--debuncher
US4594530A (en) * 1983-05-20 1986-06-10 Cgr Mev Accelerating self-focusing cavity for charged particles
US5038077A (en) * 1989-01-31 1991-08-06 The United States Of American As Represented By The Secretary Of The Navy Gyroklystron device having multi-slot bunching cavities

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2190515A (en) * 1938-07-15 1940-02-13 Gen Electric Ultra short wave device
US2284751A (en) * 1939-08-31 1942-06-02 Rca Corp Resonant cavity device
US2401945A (en) * 1941-03-27 1946-06-11 Rca Corp Frequency multiplier
US2405175A (en) * 1941-04-04 1946-08-06 Bell Telephone Labor Inc Ultra high frequency oscillator
US2422695A (en) * 1943-05-07 1947-06-24 Bell Telephone Labor Inc Suppression of parasitic oscillations in high-frequency devices

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2190515A (en) * 1938-07-15 1940-02-13 Gen Electric Ultra short wave device
US2284751A (en) * 1939-08-31 1942-06-02 Rca Corp Resonant cavity device
US2401945A (en) * 1941-03-27 1946-06-11 Rca Corp Frequency multiplier
US2405175A (en) * 1941-04-04 1946-08-06 Bell Telephone Labor Inc Ultra high frequency oscillator
US2422695A (en) * 1943-05-07 1947-06-24 Bell Telephone Labor Inc Suppression of parasitic oscillations in high-frequency devices

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2754448A (en) * 1950-06-21 1956-07-10 Hartford Nat Bank & Trust Co Velocity modulation tube of the kind comprising a drift space
US2758245A (en) * 1950-12-14 1956-08-07 Varian Associates Beam type electronic tube
US2857549A (en) * 1952-08-01 1958-10-21 Int Standard Electric Corp Electron velocity modulation tubes
US2918599A (en) * 1953-02-27 1959-12-22 Int Standard Electric Corp Electron velocity modulation tubes
US3043986A (en) * 1956-03-16 1962-07-10 Commissariat Energie Atomique Particle accelerators
US2974252A (en) * 1957-11-25 1961-03-07 Bell Telephone Labor Inc Low noise amplifier
US3067359A (en) * 1958-05-05 1962-12-04 Commissariat Energie Atomique Structure for linear ion accelerators
US3012170A (en) * 1958-08-29 1961-12-05 Eitel Mccullough Inc Charged particle beam modulating means and method
US3076117A (en) * 1959-04-27 1963-01-29 Gen Electric Parametric energy converter
US3107313A (en) * 1959-10-30 1963-10-15 Johann R Hechtel Velocity modulated electron tube with cathode means providing plural electron streams
DE1290634B (de) * 1961-03-07 1969-03-13 Siemens Ag Elektronenstrahlroehre mit Geschwindigkeitsmodulation
US3274430A (en) * 1963-08-01 1966-09-20 Massachusetts Inst Technology Biased-gap klystron
US3392300A (en) * 1964-11-12 1968-07-09 Thomson Houston Comp Francaise Hollow-beam electron gun with a control electrode
US4284923A (en) * 1978-11-23 1981-08-18 Commissariat A L'energie Atomique Ion beam buncher--debuncher
US4594530A (en) * 1983-05-20 1986-06-10 Cgr Mev Accelerating self-focusing cavity for charged particles
US5038077A (en) * 1989-01-31 1991-08-06 The United States Of American As Represented By The Secretary Of The Navy Gyroklystron device having multi-slot bunching cavities

Also Published As

Publication number Publication date
BE481272A (is")
FR922150A (fr) 1947-05-30

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