Design and operation of a 12.5‐ns multichannel scaler
作者:
Thomas L. Bunn,
W. Stephen Woodward,
Tomas Baer,
期刊:
Review of Scientific Instruments
(AIP Available online 1984)
卷期:
Volume 55,
issue 11
页码: 1849-1853
ISSN:0034-6748
年代: 1984
DOI:10.1063/1.1137678
出版商: AIP
数据来源: AIP
摘要:
A fast multichannel scaler has been developed with a resolution of 12.5 ns and and a channel memory of 215(32 768), yielding a timing range of 410 &mgr;s. The maximum cycle time of the instrument is 30 starts/s. Fast timing is achieved by the use of multiplexing and parallelism in data collection and transfer. When operating at the highest resolution, each channel is a 1‐bit counter (flip‐flop). The scaler is intimately interfaced to an 8‐bit Z80 microcomputer. The characteristics of the scaler are ideal for ion time‐of‐flight measurements in multiphoton ionization experiments. The time resolution is illustrated with a photoelectron–photoion coincidence time‐of‐flight mass spectrum. In addition, the MCS is compared to a time‐to‐pulse‐height converter/multichannel analyzer system by collecting random stop signals.
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