Field emission dark current of technical metallic electrodes

被引：11

作者：

Le Pimpec, F. ^{[1
]}

Ganter, R. ^{[1
]}

Betemps, R. ^{[1
]}

机构：

[1] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2007年 / 574卷 / 01期

关键词：

DC breakdown; dark current; plasma processing; high gradient; field emission;

D O I：

10.1016/j.nima.2007.01.087

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

In the framework of the Low Emittance Gun (LEG) project, high gradient acceleration of a low emittance electron beam will be necessary. In order to achieve this acceleration, a -500 kV, 250 ns FWHM, pulse will be applied between two electrodes. Those electrodes should sustain the pulsed field without arcing, must not outgas and must not emit electrons. Ion back bombardment, and dark current will be damaging to the electron source as well as for the low emittance beam. Electrodes of commercially available OFE copper, aluminium, stainless steel (SS), titanium and molybdenum were tested, following different procedures including plasma glow discharge cleaning. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：7 / 16

页数：10

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