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Proceedings Paper

Effect of beam geometric deformation on the properties of ECRM
Author(s): Yongjian Yu
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Paper Abstract

Practical electron beams are subject to various kinds of errors relative to the ideal one. In particular , therewould be eccentric errors due to the deviation between the symmetric axis of the beam and that of the waveguide ;andgeometric deformation errors caused by the non-axisymmetry of the beam cross-section. In order to quantitativelyanalyze the effect of these kinds of geometric deformation errors on practical gyrotron small-signal characteristics ina general sense ,in this paper firstly is proposed the elliptical ring beam geometic deformation model and then is set upthe kinetic theory that describes the interaction between the elliptical ring monoenergetic hollow beam and the TETnnmode travilling wave. Finally,taking the TE01 mode fundamental cyclotron ECRM an example ,is presented the quan- titative relationship between the ECRM coupling coefficient and the geometric errors for elliptical ring beams withsmall eccectricity and small focus -waveguide axes deviation.

Paper Details

Date Published: 30 August 1993
PDF: 2 pages
Proc. SPIE 2104, 18th International Conference on Infrared and Millimeter Waves, 21046K (30 August 1993); doi: 10.1117/12.2298668
Show Author Affiliations
Yongjian Yu, Univ. of Electronic Science and Technology (China)

Published in SPIE Proceedings Vol. 2104:
18th International Conference on Infrared and Millimeter Waves
James R. Birch; Terence J. Parker, Editor(s)

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