CA2381265A1 - Optical magnetron for high efficiency production of optical radiation, and 1/2.lambda. induced pi-mode operation - Google Patents

Optical magnetron for high efficiency production of optical radiation, and 1/2.lambda. induced pi-mode operation Download PDF

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Publication number
CA2381265A1
CA2381265A1 CA002381265A CA2381265A CA2381265A1 CA 2381265 A1 CA2381265 A1 CA 2381265A1 CA 002381265 A CA002381265 A CA 002381265A CA 2381265 A CA2381265 A CA 2381265A CA 2381265 A1 CA2381265 A1 CA 2381265A1
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CA
Canada
Prior art keywords
anode
cathode
lambda
optical
resonant cavities
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.)
Granted
Application number
CA002381265A
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French (fr)
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CA2381265C (en
Inventor
James G. Small
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Raytheon Co
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Raytheon Company
James G. Small
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 Company, James G. Small filed Critical Raytheon Company
Publication of CA2381265A1 publication Critical patent/CA2381265A1/en
Application granted granted Critical
Publication of CA2381265C publication Critical patent/CA2381265C/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
    • H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
    • H01J23/165—Manufacturing processes or apparatus therefore
    • 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
    • H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
    • H01J23/18—Resonators
    • H01J23/20—Cavity resonators; Adjustment or tuning thereof
    • H01J23/213—Simultaneous tuning of more than one resonator, e.g. resonant cavities of a magnetron
    • 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
    • H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
    • H01J23/18—Resonators
    • H01J23/22—Connections between resonators, e.g. strapping for connecting resonators of a magnetron
    • 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

Abstract

An optical magnetron is provided which includes a cylindrical cathode having a radius rc, and an annular-shaped anode having a radius ra and coaxially aligned with the cathode to define an anode-cathode space having a width wa=ra-rc. The optical magnetron further includes an electrical contacts for applying a dc voltage between the anode and the cathode and establishing an electric field across the anode-cathode space, and at least one magnet arranged to provide a dc magnetic field within the anode-cathode space generally normal to the electric field. A plurality of resonant cavities are provided with each having an opening along a surface of the anode which defines the anode-cathode space. Electrons emitted from the cathode are influenced by the electric and magnetic fields to follow a path through the anode-cathode space and pass in close proximity to the openings of the resonant cavities to create a resonant field in the resonant cavities. The resonant cavities are each designed to resonate at a frequency having a wavelength .lambda., and circumference 2 .pi. ra of the surface of the anode is greater than .lambda..
CA002381265A 2000-06-01 2001-05-21 Optical magnetron for high efficiency production of optical radiation, and 1/2.lambda. induced pi-mode operation Expired - Lifetime CA2381265C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US09/584,887 US6373194B1 (en) 2000-06-01 2000-06-01 Optical magnetron for high efficiency production of optical radiation
US09/584,887 2000-06-01
US09/798,623 US6504303B2 (en) 2000-06-01 2001-03-01 Optical magnetron for high efficiency production of optical radiation, and 1/2λ induced pi-mode operation
US09/798,623 2001-03-01
PCT/US2001/016622 WO2001097250A2 (en) 2000-06-01 2001-05-21 Magnetrons and methods of making them

Publications (2)

Publication Number Publication Date
CA2381265A1 true CA2381265A1 (en) 2001-12-20
CA2381265C CA2381265C (en) 2006-10-17

Family

ID=24339181

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002381265A Expired - Lifetime CA2381265C (en) 2000-06-01 2001-05-21 Optical magnetron for high efficiency production of optical radiation, and 1/2.lambda. induced pi-mode operation

Country Status (9)

Country Link
US (3) US6373194B1 (en)
EP (1) EP1230662A2 (en)
JP (1) JP4970697B2 (en)
CN (1) CN1249768C (en)
AU (1) AU767479B2 (en)
CA (1) CA2381265C (en)
IL (2) IL147631A (en)
NZ (1) NZ516754A (en)
WO (1) WO2001097250A2 (en)

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Also Published As

Publication number Publication date
CN1249768C (en) 2006-04-05
US20020070671A1 (en) 2002-06-13
CA2381265C (en) 2006-10-17
US6373194B1 (en) 2002-04-16
IL147631A (en) 2011-07-31
US20020140356A1 (en) 2002-10-03
WO2001097250A2 (en) 2001-12-20
JP2004503907A (en) 2004-02-05
IL211172A0 (en) 2011-04-28
WO2001097250A3 (en) 2002-06-06
US6504303B2 (en) 2003-01-07
AU767479B2 (en) 2003-11-13
AU7490001A (en) 2001-12-24
CN1383572A (en) 2002-12-04
EP1230662A2 (en) 2002-08-14
IL211172A (en) 2013-10-31
JP4970697B2 (en) 2012-07-11
NZ516754A (en) 2004-10-29
US6538386B2 (en) 2003-03-25

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