GB969833A - Crossed-field electron discharge device - Google Patents

Crossed-field electron discharge device

Info

Publication number
GB969833A
GB969833A GB2163/63A GB216363A GB969833A GB 969833 A GB969833 A GB 969833A GB 2163/63 A GB2163/63 A GB 2163/63A GB 216363 A GB216363 A GB 216363A GB 969833 A GB969833 A GB 969833A
Authority
GB
United Kingdom
Prior art keywords
cathode
magnetron
electron
crossed
thermally conductive
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
GB2163/63A
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.)
Raytheon Co
Original Assignee
Raytheon Co
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 Raytheon Co filed Critical Raytheon Co
Publication of GB969833A publication Critical patent/GB969833A/en
Expired legal-status Critical Current

Links

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
    • H01J23/04—Cathodes
    • H01J23/05—Cathodes having a cylindrical emissive surface, e.g. cathodes for magnetrons
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/30—Cold cathodes, e.g. field-emissive cathode
    • H01J1/304—Field-emissive cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J21/00—Vacuum tubes
    • H01J21/02—Tubes with a single discharge path
    • H01J21/06—Tubes with a single discharge path having electrostatic control means only
    • H01J21/10—Tubes with a single discharge path having electrostatic control means only with one or more immovable internal control electrodes, e.g. triode, pentode, octode
    • H01J21/14—Tubes with means for concentrating the electron stream, e.g. beam tetrode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
    • H01J25/42—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and with a magnet system producing an H-field crossing the E-field
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
    • H01J25/52—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode
    • H01J25/58—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode having a number of resonators; having a composite resonator, e.g. a helix
    • H01J25/587—Multi-cavity magnetrons
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/46—Generating plasma using applied electromagnetic fields, e.g. high frequency or microwave energy
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/46—Generating plasma using applied electromagnetic fields, e.g. high frequency or microwave energy
    • H05H1/4645—Radiofrequency discharges
    • H05H1/466—Radiofrequency discharges using capacitive coupling means, e.g. electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0029—Electron beam tubes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H2240/00—Testing

Abstract

969,833. Magnetron amplifiers and oscillators. RAYTHEON CO. Jan. 17, 1963 [March 15, 1962], No. 2163/63. Heading H1D. In a crossed-field electron discharge tube such as a magnetron or an amplifier tube with re-entrant electron stream and non-re-entrant wave propagating structure as described in Specification 928,540, the cathode 22, Fig. 1, as shown in a multi-cavity strapped magnetron, has a sharp edge 23 coated with electron emissive material 24 in order to produce arcing and consequent ionization of gas molecules. Heating and secondary emission is produced by back bombardment to sustain electron flow after operation is started by the initial concentration of electrons. Minute wires may be disposed along the sharp edge, the wires consisting of tungsten plated with rhenium, iridium or platinum to avoid a gettering action by the tungsten. As shown in Fig. 5, the cathode body has a good thermally conductive central layer 48 and outer poor thermally conductive layers 49, 51 to act as heat reservoirs. The cathode is supported, Fig. 1, by a stem 21, the lower end of which is slidable in an insulating sleeve 27 or the cathode may be supported from one end plate 2, 3 only. In Fig. 7 there are two disc-shaped cathode bodies and end shields 64, 65 are provided as shown with tilted edges, or with bulbous edges or in another embodiment with flat end shields held at a positive potential in order to concentrate the electric field in the vicinity of the cathode edge.
GB2163/63A 1962-03-15 1963-01-17 Crossed-field electron discharge device Expired GB969833A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US179853A US3109123A (en) 1962-03-15 1962-03-15 Electron discharge devices with a sharp edged cathode

Publications (1)

Publication Number Publication Date
GB969833A true GB969833A (en) 1964-09-16

Family

ID=22658253

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2163/63A Expired GB969833A (en) 1962-03-15 1963-01-17 Crossed-field electron discharge device

Country Status (7)

Country Link
US (1) US3109123A (en)
BE (1) BE625855A (en)
DE (1) DE1441243B2 (en)
FR (1) FR1339981A (en)
GB (1) GB969833A (en)
NL (2) NL130734C (en)
SE (1) SE316239B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2627646A1 (en) * 1988-02-18 1989-08-25 Litton Systems Inc POLARIZATION CIRCUIT FOR CROSS FIELD AMPLIFIER AND METHOD FOR IMPROVING PRIMING
GB2274198A (en) * 1992-12-11 1994-07-13 Litton Systems Inc Cross field amplifier
US5874806A (en) * 1996-10-02 1999-02-23 Litton Systems, Inc. Passive jitter reduction in crossed-field amplifier with secondary emission material on anode vanes

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3305753A (en) * 1963-05-03 1967-02-21 Westinghouse Electric Corp Magnetron having magnetic bias of such strength as to make cyclotron frequency equal to twice pi frequency, useful for cold cathode operation
US3619709A (en) * 1970-07-06 1971-11-09 Ratheon Co Gridded crossed field traveling wave device
US3921027A (en) * 1974-09-13 1975-11-18 Joe Shelton Microwave beam tube
US4975656A (en) * 1989-03-31 1990-12-04 Litton Systems, Inc. Enhanced secondary electron emitter
US5159241A (en) * 1990-10-25 1992-10-27 General Dynamics Corporation Air Defense Systems Division Single body relativistic magnetron
RU2007777C1 (en) * 1992-04-15 1994-02-15 Предприятие "Плутон" Magnetron
IL106905A (en) * 1993-09-03 1997-01-10 Israel State Magnetron construction particularly useful as a relativistic magnetron
JP3390562B2 (en) * 1994-06-28 2003-03-24 シャープ株式会社 Magnetron and microwave oven
JP3333421B2 (en) * 1997-02-28 2002-10-15 シャープ株式会社 Flat magnetron
RU2133515C1 (en) * 1997-12-09 1999-07-20 Махов Владимир Ильич Cathode unit for electronic devices and electronic device
US6686696B2 (en) * 2001-03-08 2004-02-03 Genvac Aerospace Corporation Magnetron with diamond coated cathode
US20100062288A1 (en) * 2005-11-18 2010-03-11 David Weber System for generation of useful electrical energy from isotopic electron emission

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2627646A1 (en) * 1988-02-18 1989-08-25 Litton Systems Inc POLARIZATION CIRCUIT FOR CROSS FIELD AMPLIFIER AND METHOD FOR IMPROVING PRIMING
GB2274198A (en) * 1992-12-11 1994-07-13 Litton Systems Inc Cross field amplifier
GB2274198B (en) * 1992-12-11 1997-01-08 Litton Systems Inc Cross-field amplifier
US5874806A (en) * 1996-10-02 1999-02-23 Litton Systems, Inc. Passive jitter reduction in crossed-field amplifier with secondary emission material on anode vanes

Also Published As

Publication number Publication date
FR1339981A (en) 1963-10-11
NL285091A (en)
NL130734C (en)
SE316239B (en) 1969-10-20
DE1441243A1 (en) 1970-07-09
DE1441243B2 (en) 1970-07-09
US3109123A (en) 1963-10-29
BE625855A (en)

Similar Documents

Publication Publication Date Title
GB969833A (en) Crossed-field electron discharge device
US2146025A (en) Coating by cathode disintegration
US2331398A (en) Electronic discharge device
US1863702A (en) Gaseous conduction method and apparatus
US2125280A (en) Electron discharge apparatus
US2340799A (en) Electronic discharge device
US2504231A (en) Gaseous discharge device
US2403745A (en) Apparatus and method for making tubes
GB1141448A (en) Multiple-cathode x-ray triode tube
ES378259A1 (en) Ion source having a uniform radial density
US2034571A (en) Electrical discharge device and method of operating same
US2825833A (en) Electron tube for magnetic induction accelerator
US2660685A (en) Control electrode-anode structure for gas discharge devices
GB374889A (en) Improvements in or relating to electric discharge devices
US2479529A (en) Electron discharge device
US2259451A (en) Method and apparatus for electric discharge
US2728004A (en) Glow tube
US3080104A (en) Ionic pump
US2584758A (en) Gaseous discharge device
US2644101A (en) Anode insulating structure
US2811660A (en) Ion chamber amplifier tube
US3242374A (en) Cold cathode with nickel base, calcium oxide interface and magnesium oxide layer
GB1398167A (en) High pressure ion sources
US2544513A (en) Gas discharge device
US3065372A (en) Grid controlled gaseous discharge tube