Doppler shift dominated cyclotron masers

Lin, A. T.

doi:10.1080/00207218408938988

Cited by 56 publications

(5 citation statements)

References 9 publications

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“…Evidently, the higher mode operation corresponds to large-volume dimensions, and thus benefits both the increase in power capacity and the practicality of manufacture. Meanwhile, the cylindricalstructure cyclotron autoresonance maser (CARM) has been theoretically demonstrated to have high power and high efficiency in the millimetre wave range (Petelin 1974, Bratman et al 1981, 2001, Lin 1984, Fliflet 1986, Bekefi et al 1989, Zhang 1991, Cooke et al 1996, Dawn et al 1998. However, in experiments the efficiency is much lower because of the strong sensitivity to electron velocity spread.…”

Section: Introductionmentioning

confidence: 98%

Influences of the initial parameters on the performance of a coaxial-waveguide cyclotron autoresonance maser (CARM) amplifier

Zhang¹,

Zhang²,

Qiu³

2005

International Journal of Electronics

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2005) Influences of the initial parameters on the performance of a coaxial-waveguide cyclotron autoresonance maser (CARM) amplifier, International Journal of Electronics, 92:1, 55-62, Nonlinear simulations demonstrate the possibility for a coaxial-waveguide cyclotron autoresonance maser (CARM) amplifier to operate at a frequency of 140 GHz emitting hundreds of watts with an ultrahigh gain of 68 dB. Careful design of the operating magnetic field is of importance to the power of the device, although the other initial parameters such as electron-beam radius and voltage also affect the power. Like a cylindrical-waveguide CARM, a coaxial-waveguide CARM amplifier is sensitive to the velocity spread of the electron beam.

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Section: Introductionmentioning

confidence: 98%

Influences of the initial parameters on the performance of a coaxial-waveguide cyclotron autoresonance maser (CARM) amplifier

Zhang¹,

Zhang²,

Qiu³

2005

International Journal of Electronics

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“…In addition to the development of the relativistic klystron and the lasertron, there have been rapid advances during the past decade in the development of high power millimeter wave sources such as the gyrotron [25,26], gyroklystrons [27,28], and free electron lasers or ubitrons [29,30]. Recently, there has also been considerable theoretical interest in the cyclotron autoresonance maser (CARM) [3,31,32,33,34,35,36]. One of the objectives of this program has been the investigation of the CARM amplifier as a potential source of high-peak-power 17 GHz RF for use as the driver for the next linear collider.…”

Section: Introductionmentioning

confidence: 99%

High frequency CARM driver for rf linacs. Final report, September 15, 1989--March 15, 1993

Danly¹

1993

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This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or _ervice by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views MASTE and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

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“…Important advances have been reported in research on electron cyclotron masers such as the gyrotron [1,2], cyclotron autoresonance masers (CARM) [3][4][5][6][7][8], Cherenkov sources [9], free electron lasers (EEL) [10][11][12], and other novel devices. For applications such as electron cyclotron heating (ECRH) of fusion plasmas, where high average power is needed, the CARM represents a potential alternative to the gyrotron as a source of high power in the millimeter wave band,…”

mentioning

confidence: 99%

Experimental study of a 28 GHz high-power long-pulse cyclotron autoresonance maser oscillator

et al. 1993

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Experimental results of the first efficient operation of a long-pulse cyclotron autoresonance maser oscillator are presented. Output power of 1.9 MW for a beam energy of 450 keV and current of 80 A, corresponding to an efficiency of 5.2%, has been measured at 27.8 GHz in the TEn mode of a Bragg resonator. The observed frequency of the cyclotron autoresonance maser emission corresponds to a Doppler upshifted frequency of 2.9 times the relativistic cyclotron frequency. A significant mode competition between the TEn and a TMoi mode is present.

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Doppler shift dominated cyclotron masers

Cited by 56 publications

References 9 publications

Influences of the initial parameters on the performance of a coaxial-waveguide cyclotron autoresonance maser (CARM) amplifier

Influences of the initial parameters on the performance of a coaxial-waveguide cyclotron autoresonance maser (CARM) amplifier

High frequency CARM driver for rf linacs. Final report, September 15, 1989--March 15, 1993

Experimental study of a 28 GHz high-power long-pulse cyclotron autoresonance maser oscillator

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