RF tubes for space-based accelerators

Gilmour, A. S.; Farney, G.K.; Gray, B.R.

doi:10.1109/16.88499

Cited by 6 publications

(5 citation statements)

References 13 publications

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“…In all cases, efficiencies between 55 and 75% were achieved, and the system sizes and weights were a factor of two smaller than those of comparable klystrons. This makes the klystrode a promising device for spaced-based applications [68]. Such performance would not be possible without pyrolytic graphite grids.…”

Section: Cathode Modulation Grids Fabricated From Pyrolytic Graphitementioning

confidence: 99%

Applications of advanced materials technologies to vacuum electronic devices

Calame

Abe

1999

Proc. IEEE

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Section: Cathode Modulation Grids Fabricated From Pyrolytic Graphitementioning

confidence: 99%

Applications of advanced materials technologies to vacuum electronic devices

Calame

Abe

1999

Proc. IEEE

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“…Evidently, in order to attain the high efficiency and high power advantage of the PB-FEL (41) and (48) it is best to operate in the regime ÿ 0 2K s sat 2. However, to arrive at the desirable high-efficiency trapped-electrons stable branch B, one must overcome the bistability problem and ''leap'' over the ''open-trajectories'' stable saturation branch D. One obvious way to do it is to inject into the resonator initial power with a corresponding K s0 parameter, which exceeds the unstable steady-state branch D.…”

Section: -11mentioning

confidence: 99%

“…The most important feature of this device, which gives it an advantage over a conventional FEL oscillator, is the possibility to attain total radiation generation efficiency, close to the ultimate gen 1. Examples of specialized situations where such a feature is of great importance are (i) space based radiation sources [41], where heat generation due to inefficient radiative generation generates a difficult heat dissipation problem, and (ii) future high power (MW level) radiation sources, where low radiation generation efficiencies would cause difficult heat dissipation problems and other beam energy dumping technical problems [42].…”

Section: -11mentioning

confidence: 99%

Superradiant and stimulated-superradiant emission in prebunched electron-beam radiators. II. Radiation enhancement schemes

Gover

Dyunin

Lurie

et al. 2005

Phys. Rev. ST Accel. Beams

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Further enhancement of the intense coherent superradiant and stimulated-superradiant emission from prebunched electron beams is possible, in schemes of prebunched beam radiation devices, and particularly free electron laser (FEL). The enhancement of coherent power and spectral power by use of a waveguide, particularly at the zero-slippage condition, is evaluated. A special scheme of a stimulated-superradiance FEL oscillator is analyzed and is shown to feature ultimate radiative energy conversion efficiency (near 100%). A. GOVER et al. Phys. Rev. ST Accel. Beams 8, 030702 (2005) 030702-2 A. GOVER et al. Phys. Rev. ST Accel. Beams 8, 030702 (2005) 030702-4

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“…By decoupling the output from the input, the stability of the CFA is improved. This also extends its applications to ones where a variable load is used, such as particle accelerators [86].…”

Section: Cathode Driven Crossed Field Amplifiersmentioning

confidence: 88%

“…The cathode driven CFA [85,86] has the basic format of the conventional cold cathode This approach isolates the source power from load reflections. By decoupling the output from the input, the stability of the CFA is improved.…”

Section: Cathode Driven Crossed Field Amplifiersmentioning

confidence: 99%

Simulation of a Crossed-Field Amplifier Using a Modulated Distributed Cathode

Pearlman¹

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I would like to thank the Boise State University department of Electrical and Computer Engineering for financial support of this research. I thank the U.S. Air Force Office of Scientific Research for their financial support under Grant FA9550-12-C-0066. I also express my gratitude to TechX Corporation for their support of our work with Vsim and in particular David Smithe for his help. And, of course, I am immensely grateful to the review committee, Wan Kuang, Kris Campbell, Jim Browning, and Yue Ying Lau for their time and effort in validating this dissertation. I also want to thank Janos Cserna for helping develop much of the experiment, specifically the X-Y stage used to measure the dispersion. I also wish to thank Kyle Straub and Tyler Rowe for their part in developing the experimental setup, and for their collaboration.

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RF tubes for space-based accelerators

Cited by 6 publications

References 13 publications

Applications of advanced materials technologies to vacuum electronic devices

Applications of advanced materials technologies to vacuum electronic devices

Superradiant and stimulated-superradiant emission in prebunched electron-beam radiators. II. Radiation enhancement schemes

Simulation of a Crossed-Field Amplifier Using a Modulated Distributed Cathode

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