Absolute Efficiency Measurements for Channel Electron Multipliers Utilizing a Unique Electron Source
作者:
G. Paschmann,
E. G. Shelley,
C. R. Chappell,
R. D. Sharp,
L. F. Smith,
期刊:
Review of Scientific Instruments
(AIP Available online 1970)
卷期:
Volume 41,
issue 12
页码: 1706-1711
ISSN:0034-6748
年代: 1970
DOI:10.1063/1.1684393
出版商: AIP
数据来源: AIP
摘要:
A unique low energy (0–50 keV) electron accelerator has been developed which provides a broad, parallel, low intensity electron beam with excellent long term stability. The beam intensity is approximately 106electrons·cm−2·sec−1and the long term stability is better than 2%/day. A prototype of this accelerator is described and the results of its application to instrument calibration and channel electron multiplier (CEM) efficiency measurements are presented. The absolute electron detection efficiency for CEM's was found to vary from approximately 90% at 1 keV to 73% at 14 keV with a probable error of ±10%. The large disagreement among the various published measurements of CEM detection efficiency is discussed.
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