High‐gain imaging electron multiplier
作者:
W. B. Colson,
J. McPherson,
F. T. King,
期刊:
Review of Scientific Instruments
(AIP Available online 1973)
卷期:
Volume 44,
issue 12
页码: 1694-1696
ISSN:0034-6748
年代: 1973
DOI:10.1063/1.1686034
出版商: AIP
数据来源: AIP
摘要:
The chevron‐shaped channel electron multiplier is a device which combines the high‐gain pulse‐counting operation of single channel electron multipliers with the imaging capabilities of microchannel arrays. It produces charge pulses averaging more than 107electrons and these gain magnitudes fall into a quasi‐Gaussian distribution with a full width at half‐maximum FWHM of approximately 130%. Suppression of ion feedback makes possible both imaging and low noise counting applications over large areas. Dark count rates are typically 1 count/sec cm2, and the dynamic range of operation covers 5–6 decades. Active areas over 45 mm diam have been fabricated, with uniform characteristics. Limiting resolution has been measured at 5 line pairs per millimeter. Because of the short length of each channel electron multiplier, the rise time and width of the output charge pulses are extremely short; large signal pulses have been detected with rise times as short as 400 psec.
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