Initial operation of a high-power frequency-doubling x-band magnicon amplifier

Steven H. Gold; Alien K. Kinkead; Arne W. Fliflet; Bahman Hafizi; Wallace M. Manheimer

doi:10.1109/27.533100

Initial operation of a high-power frequency-doubling x-band magnicon amplifier

Steven H. Gold, Alien K. Kinkead, Arne W. Fliflet, Bahman Hafizi, Wallace M. Manheimer

Research output: Contribution to journal › Article › peer-review

Abstract

This paper reports the initial high-power operation of a frequency-doubling magnicon amplifier at 11.120 GHz. The deflection cavities operate at S.560 GHz. The device is operating in a single-pulse mode at 650 kV and ~225 A, using a 5.5-mm diameter beam from a plasma cathode, at a magnetic field of 6.7-8.2 kG. In order to overcome a gain saturation problem in the deflection cavities caused by plasma loading, the penultimate deflection cavity is operated very close to self-oscillation. The typical output pulselength is 100 ns full width at half maximum (FWHM), and is limited by RF breakdown of the penultimate cavity. Based on the measured far-field antenna pattern and absolute calibration of all microwave components, the measured output power is 14 MW (±3 dB), corresponding to an efficiency of ~10%.

Original language	English (US)
Pages (from-to)	947-956
Number of pages	10
Journal	IEEE Transactions on Plasma Science
Volume	24
Issue number	3
DOIs	https://doi.org/10.1109/27.533100
State	Published - 1996
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics
Condensed Matter Physics

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10.1109/27.533100

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title = "Initial operation of a high-power frequency-doubling x-band magnicon amplifier",

abstract = "This paper reports the initial high-power operation of a frequency-doubling magnicon amplifier at 11.120 GHz. The deflection cavities operate at S.560 GHz. The device is operating in a single-pulse mode at 650 kV and ~225 A, using a 5.5-mm diameter beam from a plasma cathode, at a magnetic field of 6.7-8.2 kG. In order to overcome a gain saturation problem in the deflection cavities caused by plasma loading, the penultimate deflection cavity is operated very close to self-oscillation. The typical output pulselength is 100 ns full width at half maximum (FWHM), and is limited by RF breakdown of the penultimate cavity. Based on the measured far-field antenna pattern and absolute calibration of all microwave components, the measured output power is 14 MW (±3 dB), corresponding to an efficiency of ~10%.",

author = "Gold, {Steven H.} and Kinkead, {Alien K.} and Fliflet, {Arne W.} and Bahman Hafizi and Manheimer, {Wallace M.}",

note = "Funding Information: Manuscript received September 19, 1995; revised January 8, 1996. This work was supported by the U.S. Department of Energy under Interagency Agreement DE-AIOZ-94ER40861. A001, and by the Office of Naval Research. S. H. Gold, A. W. Fliflet, and W. M. Manheimer are with the Beam Physics Branch, Plasma Physics Division, Naval Research Laboratory, Washington, D.C. 20375-5346 USA (e-mail: gold1 @ppdu.nrl.navy.mil). A. K. Kinkead is with SachsEreeman Associates, Inc., Landover, MD 20785 USA. B. Hafizi is with Icarus Research, Bethesda, MD 20824 USA. Publisher Item Identifier S 0093-38 13(96)04645-0.",

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AU - Manheimer, Wallace M.

N1 - Funding Information: Manuscript received September 19, 1995; revised January 8, 1996. This work was supported by the U.S. Department of Energy under Interagency Agreement DE-AIOZ-94ER40861. A001, and by the Office of Naval Research. S. H. Gold, A. W. Fliflet, and W. M. Manheimer are with the Beam Physics Branch, Plasma Physics Division, Naval Research Laboratory, Washington, D.C. 20375-5346 USA (e-mail: gold1 @ppdu.nrl.navy.mil). A. K. Kinkead is with SachsEreeman Associates, Inc., Landover, MD 20785 USA. B. Hafizi is with Icarus Research, Bethesda, MD 20824 USA. Publisher Item Identifier S 0093-38 13(96)04645-0.

PY - 1996

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N2 - This paper reports the initial high-power operation of a frequency-doubling magnicon amplifier at 11.120 GHz. The deflection cavities operate at S.560 GHz. The device is operating in a single-pulse mode at 650 kV and ~225 A, using a 5.5-mm diameter beam from a plasma cathode, at a magnetic field of 6.7-8.2 kG. In order to overcome a gain saturation problem in the deflection cavities caused by plasma loading, the penultimate deflection cavity is operated very close to self-oscillation. The typical output pulselength is 100 ns full width at half maximum (FWHM), and is limited by RF breakdown of the penultimate cavity. Based on the measured far-field antenna pattern and absolute calibration of all microwave components, the measured output power is 14 MW (±3 dB), corresponding to an efficiency of ~10%.

AB - This paper reports the initial high-power operation of a frequency-doubling magnicon amplifier at 11.120 GHz. The deflection cavities operate at S.560 GHz. The device is operating in a single-pulse mode at 650 kV and ~225 A, using a 5.5-mm diameter beam from a plasma cathode, at a magnetic field of 6.7-8.2 kG. In order to overcome a gain saturation problem in the deflection cavities caused by plasma loading, the penultimate deflection cavity is operated very close to self-oscillation. The typical output pulselength is 100 ns full width at half maximum (FWHM), and is limited by RF breakdown of the penultimate cavity. Based on the measured far-field antenna pattern and absolute calibration of all microwave components, the measured output power is 14 MW (±3 dB), corresponding to an efficiency of ~10%.

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Initial operation of a high-power frequency-doubling x-band magnicon amplifier

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