HARMONIC GYRORESONANCE OF ELECTRONS IN COMBINED HELICAL WIGGLER AND AXIAL GUIDE MAGNETIC-FIELDS

被引:32
作者
CHU, KR [1 ]
LIN, AT [1 ]
机构
[1] UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024
关键词
D O I
10.1103/PhysRevLett.67.3235
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A driven-oscillator model is developed to examine the orbital-velocity harmonics of off-axis electrons in combined helical wiggler and axial guide magnetic fields. The gyroresonance effect is found to occur at harmonics of the wiggler frequency in addition to the well-known fundamental-harmonic resonance. Resonance at the first negative harmonic is potentially important for providing an explanation of the unexpected observations of a recent free-electron-laser experiment. Exploration of the gyroresonance effect as a harmonic selection mechanism for the free-electron laser is discussed.
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页码:3235 / 3238
页数:4
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