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Abstract:
In this paper, we present a general theory of the double-undulator free-electron laser, in which an additional undulator with period close to the beam electron betatron oscillation period in the main undulator is introduced. A set of self-consistent equations is developed to describe the evolution of the optical wave in this device. The basic nonlinear equations are analyzed in the low-gain regime, the high-gain regime, and the saturation regime, respectively. By properly selecting parameters of the additional undulator, we may enhance the gain or efficiency of the free-electron laser.
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References
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[1] |
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, WANG Yue
, ZHU Zhi-Chao
, TIAN Yu-Lin
, XU Hu-Shan
, SUN Zhi-Yu
, XIAO Guo-Qing
, ZHAN Wen-Long
. Experimental Study of the High-Voltage Breakdown and Simulations for the RFQ Cooler and Buncher RFQ1L. Chinese Physics C,
2006, 30(S2): 261-264. |
[2] |
WANG Man
, LI Jin
, CUI Xiang-Zong
, XIA Xiao-Mi
, LAI Yuan-Fen
, YAO Xiao-Guang
. PROTOTYPE OF END CAP SHOWER COUNTERAND ITS BEAM TEST. Chinese Physics C,
1987, 11(3): 321-326. |
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