Low energy electron beam for time-of-flight ionization measurements

被引：0
|
作者：
Limao-Vieira, P
Lobo, RFM
机构：
[1] Univ Tecn Lisboa, Ctr Fis Mol, P-1000 Lisbon, Portugal
[2] Univ Nova Lisboa, Fac Ciencias & Tecnol, Dept Fis, CeFITec, P-2825 Monte De Caparica, Portugal
来源：
VACUUM | 1999年 / 52卷 / 1-2期
关键词：
D O I：
10.1016/S0042-207X(98)00204-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A low energy electron gun was assembled in a crossed molecular beam apparatus in order to monitorize the effusive molecular beam density using the electron impact technique, Electrons were analised in both time-of-flight and Faraday cup detectors. The electrons coming directly from the gun were clearly identified, allowing those ones coming from the ionization impact to be distinguished in time-of-flight with a multichannel analyser working in PHA mode. This set-up allows to make an estimation of the electron impact cross-section ratios in CCl4 and air. (C) 1998 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：19 / 22
页数：4
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