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Low-order-mode harmonic multiplying gyrotron traveling-wave amplifier in W band
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10.1063/1.4751465
/content/aip/journal/pop/19/9/10.1063/1.4751465
http://aip.metastore.ingenta.com/content/aip/journal/pop/19/9/10.1063/1.4751465

Figures

Image of FIG. 1.
FIG. 1.

(a) Physical configuration and (b) profile of wall resistivity of the proposed gyro-TWA. Rf field amplitude of (c) mode absolute instability, (d) mode absolute instability in the drive stage and (e) mode absolute instability, (f) mode absolute instability, and (g) mode global reflective oscillation in the harmonic interaction stage.

Image of FIG. 2.
FIG. 2.

diagram of the transverse electric waveguide modes and the cyclotron harmonic beam-wave resonance lines in (a) the drive stage ( = 0.1795 cm) and (b) the harmonic interaction stage ( = 0.1492 cm).

Image of FIG. 3.
FIG. 3.

Start-oscillation current of absolute instability versus (a) length of the lossy section for mode (solid curve), mode (dashed curve) in the drive stage and (b) length of the copper section for mode (solid curve), mode (dashed curve) in the harmonic interaction stage at and . Parameters are  = 60 kV,  = 18.81 kG,  = 0.09 cm,  = 1.5, and  = 8%.

Image of FIG. 4.
FIG. 4.

Start-oscillation current of spurious oscillation versus (a) wall resistivity of the lossy section for mode absolute instability (solid curve), mode absolute instability (dashed curve) in the drive stage and (b) wall resistivity of the lossy section for mode absolute instability (dashed curve), mode absolute instability (solid curve), mode global reflective oscillation (dots) in the harmonic interaction stage at  = 1.5 cm and  = 3.4 cm. Other parameters are the same as those in Fig. 3.

Image of FIG. 5.
FIG. 5.

RF field profile of (a) mode absolute instability, (b) mode absolute instability, and (c) mode global reflective oscillation at various wall resistivity of the lossy section in Fig. 4(b). Other parameters are the same as those in Fig. 4.

Image of FIG. 6.
FIG. 6.

Output power of mode global reflective oscillation versus (a) beam current , (b) length of lossy section, and (c) wall resistivity of lossy section. Other parameters are the same as those in Fig. 4.

Image of FIG. 7.
FIG. 7.

Start-oscillation current of mode global reflective oscillation versus wall resistivity of the lossy section. Other parameters are the same as those in Fig. 3.

Image of FIG. 8.
FIG. 8.

(a) Forward wave power (solid curve) and gain (dashed curve) of the amplified wave versus the axial position z. (b) Reflected wave power (normalized to ) (solid curve) and Ohmic loss (dashed curve) of the amplified wave versus z when the amplified frequency is 98 GHz and  = 7.5 A. Other parameters are the same as those in Fig. 3.

Image of FIG. 9.
FIG. 9.

Saturated (a) output power and (b) gain of the amplified wave versus the frequency in the proposed gyro-TWA. Other parameters are the same as those in Fig. 3.

Tables

Generic image for table
Table I.

The parameters of the code for the harmonic multiplying gyro-TWA.

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/content/aip/journal/pop/19/9/10.1063/1.4751465
2012-09-07
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Low-order-mode harmonic multiplying gyrotron traveling-wave amplifier in W band
http://aip.metastore.ingenta.com/content/aip/journal/pop/19/9/10.1063/1.4751465
10.1063/1.4751465
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