Linear theory of electromagnetic wave generation in a plasma-loaded corrugated-wall resonator

Minami, Kazuo; Carmel, Y.; Granatstein, V.L.; Destler, W.W.; Lou, W. R.; Abe, David K.; Kehs, R. A.; Ali, Mortuza; Hosokawa, Tatsuzo; Ogura, K.; Watanabe, Tsuguhiro

doi:10.1109/27.55925

Cited by 95 publications

(18 citation statements)

References 8 publications

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“…In (3)(4)(5)(6)(7)(8)(9)(10)(11)(12), I is an m×m unit matrix, the dispersion function results from the requirement that (C m , D m ) be nontrivial (i.e., at least some C m ≠0 or D m ≠0), this implies that the determinant of R must vanish: Equation (3-13) is the required dispersion equation of coaxial disk-loaded SWS. It includes the dispersion relation of both symmetric and asymmetric modes.…”

Section: Derivation Of Dispersion Functionmentioning

confidence: 98%

“…From (2-13) and (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14), the electromagnetic fields can be expressed as:…”

Section: Modelingmentioning

confidence: 99%

“…Using linear perturbation theory, J A Swegle, Y Carmel and K Minami analyzed the dispersion characteristics of lower TM on modes in a sinusoidal rippled wall waveguide [3,4] . This theory is improved by Wang to solve the dispersion function of slow-wave structures with arbitrary cylindrical boundary function [5] .…”

Section: Introductionmentioning

confidence: 99%

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Rigorous analysis of the coaxial disk-loaded waveguide slow-wave structures

Wang

Fan²,

Chen³

et al. 2007

2007 International Conference on Microwave and Millimeter Wave Technology

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Taking the accurate field match theory, a rigorous dispersion function with both TM and TE modes of coaxial diskloaded waveguide slow-wave structures is derived in this paper. Numerical calculation is carried out based on the dispersion function. And the theoretical calculated results are compared with the simulated results from the MAFIA code to test the validity of our theory. Then the dependence of the dispersion characteristics on various structure parameters is numerically calculated. It helps to select proper parameters of coaxial diskloaded slow-wave structures.

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Section: Derivation Of Dispersion Functionmentioning

confidence: 98%

“…From (2-13) and (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14), the electromagnetic fields can be expressed as:…”

Section: Modelingmentioning

confidence: 99%

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Rigorous analysis of the coaxial disk-loaded waveguide slow-wave structures

Wang

Fan²,

Chen³

et al. 2007

2007 International Conference on Microwave and Millimeter Wave Technology

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“…[13][14][15][16][17] In addition, one can also fill the device with a plasma by the external injection. [18][19][20][21][22][23][24] In the case of the electron beam injection into a low pressure neutral background gas producing a plasma in the BWO, an anode foil was originally employed to separate the vacuum diode from the gas-loaded rippled-wall waveguide. 13 In this situation, the anode foil needs to be changed after each shot and the anode foil may lead to the degradation of the beam angular characteristics.…”

Section: Introductionmentioning

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%

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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