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Stability study of a gyrotron-traveling-wave amplifier based on a lossy dielectric-loaded mode-selective circuit
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10.1063/1.3166602
/content/aip/journal/pop/16/7/10.1063/1.3166602
http://aip.metastore.ingenta.com/content/aip/journal/pop/16/7/10.1063/1.3166602

Figures

Image of FIG. 1.
FIG. 1.

(a) The transverse structure and (b) the longitudinal structure of the dielectric shells and metal rings alternatively loaded interaction circuit. (c) The cold beam-wave dispersion relation of the NRL gyro-TWT.

Image of FIG. 2.
FIG. 2.

The propagation characteristics of an empty waveguide, a uniform lossy DLWaveguide, and a periodic lossy DLWaveguide with the same inner radius.

Image of FIG. 3.
FIG. 3.

(a) Normalized in the metal ring section and dielectric section, and the (b) normalized amplitude of the Bloch harmonic component of the and modes in the periodic DLWaveguide.

Image of FIG. 4.
FIG. 4.

Comparison between the theoretical simulation and the NRL fundamental mode gyro-TWT experiment under the same operation parameters.

Image of FIG. 5.
FIG. 5.

The axial power profile of the absolute instability oscillation of the mode in the unloaded waveguide (, ).

Image of FIG. 6.
FIG. 6.

Effect of the magnetic on the thresholds of the mode absolute instability oscillation in the unloaded waveguide.

Image of FIG. 7.
FIG. 7.

The effect of the current on the oscillation frequency of the mode absolute instability.

Image of FIG. 8.
FIG. 8.

The effect of the current on the critical length of the mode absolute instability.

Image of FIG. 9.
FIG. 9.

The balances between the forward wave component and the backward wave component, sampled from Figs. 7 and 8.

Image of FIG. 10.
FIG. 10.

The axial normalized power profile of the total field of the absolute instabilities in backward wave region of the fundamental mode interaction system.

Image of FIG. 11.
FIG. 11.

The absolute instabilities in the NRL fundamental mode gyro-TWT, the design parameters are given in Table I. The Aquadag scheme is also considered for comparison.

Image of FIG. 12.
FIG. 12.

Effect of the operation magnetic on the amplifier stability.

Image of FIG. 13.
FIG. 13.

Effect of the length of the unloaded stage on the amplifier stability.

Image of FIG. 14.
FIG. 14.

The field profile of a stable amplification at 33.59 GHz.

Image of FIG. 15.
FIG. 15.

Saturated power of the amplifier under the assumption that the electron beam is with .

Tables

Generic image for table
Table I.

Operating parameters of the NRL gyro-TWT amplifier.

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/content/aip/journal/pop/16/7/10.1063/1.3166602
2009-07-07
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Stability study of a gyrotron-traveling-wave amplifier based on a lossy dielectric-loaded mode-selective circuit
http://aip.metastore.ingenta.com/content/aip/journal/pop/16/7/10.1063/1.3166602
10.1063/1.3166602
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