A High-Power Backward-Wave Oscillator Driven by a Relativistic Electron Beam

Kehs, R. A.; Bromborsky, A.; Ruth, Brian G.; Graybill, S. E.; Destler, W.W.; Carmel, Y.; Wang, M. C.

doi:10.1109/tps.1985.4316473

Cited by 82 publications

(16 citation statements)

References 3 publications

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“…More interestingly, researchers have found two dips in the microwave radiation in a certain range of the axial magnetic field. 4,12,14,20 The experimental results of this article also indicate two dips ͑see Figs. 3 and 5͒ in the output microwave power.…”

Section: Discussionsupporting

confidence: 62%

“…Additionally, the measured resonant magnetic fields of this article may differ from those of previous works ͑see Refs. 1,4,9,12,14, and 20͒ because the experiment design parameters of this article are different. Similarly, one can obtain the other theoretically predicted value of the resonant magnetic field using the design parameters of our experiment; therefore, B 2 res is about 12.0 kG.…”

Section: Discussionmentioning

confidence: 99%

“…Many authors [1][2][3][4][5][6][7][8][9][10][11][12] have focused their attention on this device for more efficient operation at high-power levels, and important results have been obtained both experimentally and theoretically. In order to further enhance the output power of microwave and the conversion efficiency of electron beam to microwave radiation, some scientists [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] have introduced background plasmas into the BWOs, and both theoretical and experimental results have demonstrated that the background plasmas improve the beam-waveguide interaction dramatically.…”

Section: Introductionmentioning

confidence: 99%

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Experiment on the plasma-loaded backward-wave oscillator using a gas-loaded foil-less diode

Qian

Liu

et al. 2000

Journal of Applied Physics

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High-power microwave radiation of 9.5–13.4 GHz was generated in a plasma-loaded backward-wave oscillator employing a relativistic electron beam of 400–500 keV and 1–3 kA. This experiment was to re-examine and confirm the previous works that had been done in other various institutions. The relativistic electron beam, which was produced from a helium gas-loaded foil-less diode, was injected into the helium gas-loaded rippled-wall waveguide of the backward-wave oscillator, generating a plasma in the waveguide and then the high-power microwave radiation. A sharp increase in the output microwave power has been observed in a narrow range of the helium gas pressure, and two dips in the microwave emission have also been found in a certain range of the axial magnetic field. Additionally, at certain values of the helium gas pressure and guide magnetic field, the total microwave emission of the plasma-loaded backward-wave oscillator was found to be seven times as large as that of the vacuum case. The highest interaction efficiency was estimated to be about 29% for the present experiment.

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Section: Discussionsupporting

confidence: 62%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experiment on the plasma-loaded backward-wave oscillator using a gas-loaded foil-less diode

Qian

Liu

et al. 2000

Journal of Applied Physics

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“…In 1990 Airapetov, [33] reported the highest ferroelectric current density obtained so far (400 A/cm2). Work in the United States was started at Cornell University in 1990 with first results reported in 1993 [50]- [51]. We observed emission from PZT with reverse triggering pulses, i.e.…”

Section: Recent Developments In Ferroelectric Emissionmentioning

confidence: 87%

“…Refs. [49] and [50]). Later, a semi-analytical theory [51] was developed for describing this effect and the method of cyclotron selection based on the cyclotron absorption of unwanted modes was successfully used in a very impressive experiment [52].…”

Section: Cyclotron Resonance Effectsmentioning

confidence: 99%