Effects of beam loss on the stability of a recirculating electrostatic accelerator for a long-pulse free-electron laser

被引:2
作者
Cho, SO
Lee, BC
Jeong, YU
机构
[1] Korea Adv Inst Sci & Technol, Dept Nucl & Quantum Engn, Taejon 305701, South Korea
[2] Korea Atom Energy Res Inst, Opt Quantum Lab, Taejon 305600, South Korea
关键词
recirculating electrostatic accelerator; beam loss; stability; free-electron laser;
D O I
10.1016/j.nima.2003.07.028
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
For a long-pulse operation of a free-electron laser driven by a recirculating electrostatic accelerator, the effects of beam loss on the operational stability of the accelerator are theoretically and experimentally analyzed. If a beam loss occurs mainly in the deceleration tube, the terminal voltage can keep constant even though the lost beam current is much higher than the charging current of the accelerator. However, the beam loss can induce an unstable operation of the accelerator such as a voltage breakdown or an increase of the beam loss with time. The accelerator instability can be the main problem disturbing the long-pulse operation of the FEL. From the analysis, a method to increase the available pulse width of the FEL is presented, which is to enlarge the capacitances between the neighboring electrodes of the deceleration tube. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:402 / 409
页数:8
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