Improvement of beam macropulse properties using slim thermionic cathode in IAE RF gun

被引：0
|
作者：
Kii, T [1 ]
Miyasako, A [1 ]
Hayashi, S [1 ]
Masuda, K [1 ]
Ohgaki, H [1 ]
Yoshikawa, K [1 ]
Yamazaki, T [1 ]
机构：
[1] Kyoto Univ, Inst Adv Energy, Kyoto 6110011, Japan
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2004年 / 528卷 / 1-2期
关键词：
free-electron laser; RF gun; electron injector;
D O I：
10.1016/j.nima.2004.04.121
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A long beam macropulse is strongly required for free-electron lasers. RF guns can potentially produce high brightness electron beam using a simple and compact system. However, due to a back-bombardment, a cathode surface is overheated. Thus, it is difficult to maintain a constant beam current and beam energy during a macropulse. The use of a photo cathode with a short-pulsed laser is one of the solutions, but it affects the simplicity and the compactness of the RF guns. We studied a mechanism of back-bombardment and experimentally and numerically found that a low energy component of the back-streaming electrons plays an important role in cathode surface heating. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：408 / 411
页数：4
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