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Effect of electron beam misalignments on the gyrotron efficiency
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10.1063/1.4813257
/content/aip/journal/pop/20/7/10.1063/1.4813257
http://aip.metastore.ingenta.com/content/aip/journal/pop/20/7/10.1063/1.4813257
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Profile of a circuit wall in a 170 GHz gyrotron operating in the TE-mode.

Image of FIG. 2.
FIG. 2.

Profiles of magnetic fields in cryomagnets of “Oxford Instruments” (OI) and “Ansaldo” (ASG).

Image of FIG. 3.
FIG. 3.

The function for the ITER gyrotron in the case of ideal symmetry (a) and parallel displacement of the beam axis by 1.5 mm (b). In (b), the profiles of are shown for the ASG cryomagnet and three values of the angle : 0°, 60°, and 120°; the curves for two of them practically coincide. (The same dependencies take place for angles equal to 180°, 240°, and 300°, respectively.)

Image of FIG. 4.
FIG. 4.

Functions for the case, when not only shift but also tilt is present: (a) the tilt angle is equal to 0.5°, (b) the tilt angle is 1°. In both cases, the shift is 0.25 mm and the magnetic field profile corresponds to that of the ASG cryomagnet.

Image of FIG. 5.
FIG. 5.

Efficiency as a function of transverse coordinates in the cases of (a) parallel displacement, (b) a tilt angle 0.5°, and (c) a tilt angle 1°.

Image of FIG. 6.
FIG. 6.

Efficiency as a function of the tilt angle. The solid line corresponds to the case of a beam centered at the entrance , and the dashed line corresponds to the shift optimized for each tilt angle value.

Image of FIG. 7.
FIG. 7.

Efficiency and mode amplitudes as functions of the tilt angle. Here, and .

Image of FIG. 8.
FIG. 8.

Efficiency and mode amplitudes as functions of the displacement. Here, and .

Image of FIG. 9.
FIG. 9.

Temporal dependence of phase, efficiency, and mode amplitudes at and .

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/content/aip/journal/pop/20/7/10.1063/1.4813257
2013-07-11
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effect of electron beam misalignments on the gyrotron efficiency
http://aip.metastore.ingenta.com/content/aip/journal/pop/20/7/10.1063/1.4813257
10.1063/1.4813257
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