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

页码：408 / 411

页数：4

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