A 30-MW Gyroklystron-Amplifier Design for High-Energy Linear Accelerators

Chu, K. R.; Granatstein, V.L.; Latham, P.E.; Lawson, W.; Striffler, C. D.

doi:10.1109/tps.1985.4316456

Cited by 84 publications

(14 citation statements)

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“…The system utilizes a thermionic magnetron injection gun at voltages up to 440 kV and currents up Our present efI'ort to increase gyroklystron power levels has focused on two issues. The first involves increasing the beam voltage above conventional (long pulse) levels as described in previous design papers [11,12] [14]. In this paper, we briefly describe the experimental configuration, discuss the microwave diagnostics, and present optimal twocavity gyroklystron performance.…”

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confidence: 99%

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Efficient operation of a high-powerX-band gyroklystron

Lawson

Hogan

et al. 1991

Phys. Rev. Lett.

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Experimental studies of amplification in a two-cavity X-band gyroklystron are reported. The system utilizes a thermionic magnetron injection gun at voltages up to 440 kV and currents up Our present efI'ort to increase gyroklystron power levels has focused on two issues. The first involves increasing the beam voltage above conventional (long pulse) levels as described in previous design papers [11,12] [14]. In this paper, we briefly describe the experimental configuration, discuss the microwave diagnostics, and present optimal twocavity gyroklystron performance.Details of the experimental setup, tube stability, and flat-field amplifier experiments that achieved peak powers of 2.7 MW appear elsewhere [15].A schematic of the overall system is shown in Fig. 1(a). A 1.5-ps, 500-kV, 400-A line-type modulator provides the required voltages to the MIG. Eight water-

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“…Overmoded Our present efI'ort to increase gyroklystron power levels has focused on two issues. The first involves increasing the beam voltage above conventional (long pulse) levels as described in previous design papers [11,12]. Toward this goal, a double-anode magnetron injection gun (MIG) was developed [13] [14].…”

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confidence: 99%

Efficient operation of a high-powerX-band gyroklystron

Lawson

Hogan

et al. 1991

Phys. Rev. Lett.

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“…Sources capable of high power operation in these spectral regions are of interest for many applications including the electron cyclotron resonance heating of fusion plasmas and high resolution radar. Much of this interest has been focused on cyclotron resonance masers such as the gyrotron [1], gyro-klystron [2], gyro-traveling wave amplifier [3], and the doppler-shifted cyclotron resonance maser, also called the cyclotron autoresonance maser (CARM) [4-141. Interest in the CARM results from its potential for high-efficiency operation, large doppler upshift from the cyclotron frequency, and high power capability.…”

Section: Introductionmentioning

confidence: 99%

“…For an electron moving in a constant amplitude wave, 7(1 -0114) is a constant of the motion [15]. Therefore, in the case of luminous waves (00 = 1), an electron which is injected in resonance with the wave will remain in resonance as can be seen from (2 The efficiency of CARM amplifiers for a cold electron beam with a uniform magnetic field has been presented as a function of normalized system parameters [4,9]. The performance of CARM amplifiers including electron beam temperature is studied here.…”

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Self-consistent simulation of cyclotron autoresonance maser amplifiers

Pendergast

Danley

Temkin

et al. 1988

IEEE Trans. Plasma Sci.

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A self-consistent, one-dimensional model of the cyclotron autoresonance maser (CARM) amplifier is developed, and numerical simulations based on this model are described. Detailed studies of the CARM gain and efficiency for a wide range of initial energy and velocity spreads are presented. The interaction efficiency is found to be substantially increased when the axial magnetic field is tapered. For example, efficiencies of greater than 41% are obtained for a 140 GHz CARM amplifier with a tapered axial magnetic field and a 700 kV, 4.5 A electron beam with parallel velocity spreads of less than 1%. A discussion of the nonlinear bandwidth and interaction sensitivity to axial field inhomogenieties is presented.

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“…To calculate the gain and efficiency, we used a nonlinear, partially self-consistent code which computes the steady stat.e amplitude and phase in each cavity [2]. The beam characteristics and applied magnet,ic field are given in Ta-I)le 1.…”

Section: Circuit Designmentioning

confidence: 99%

A second harmonic amplifier for accelerator applications

Latham

Lawson

Striffler

et al.

Conference Record of the 1991 IEEE Particle Accelerator Conference

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AbsiractThe tllcoretical design of a second harmonic gyroklystron amplifier at a voltage near 500 kV is presented. Because of the relat,ively high voltage the beam tunnel must be large, so the radiation is not, cutoff in the drift tub?. To avoid feedback we operate the input, cavity at the f~lnd;rment,al, which is cutoff in the drift tube, and design a con~plt~ output cavity t,hat emits very little radiation back into 111~ drift tube. The outpllt, cavity is described in detail, and t,he overall gain and efficiency is given.

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A 30-MW Gyroklystron-Amplifier Design for High-Energy Linear Accelerators

Cited by 84 publications

References 16 publications

Efficient operation of a high-powerX-band gyroklystron

Efficient operation of a high-powerX-band gyroklystron

Self-consistent simulation of cyclotron autoresonance maser amplifiers

A second harmonic amplifier for accelerator applications

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