A Fast-Slow Coincidence System Employing a Multichannel Time Display

Author

Tomlinson, R.B. ; Brown, R.L.

Author_Institution

Atomic Energy of Canada Limited Chalk River, Ontario, Canada

Volume

11

Issue

2

fYear

1964

fDate

4/1/1964 12:00:00 AM

Firstpage

28

Lastpage

38

Abstract

A versatile, solid-state Fast-Slow Coincidence system is described which is used with large NaI(Tl) scintillators and XP1040 photomultipliers. A multichannel time display is provided which consists of a time-to-amplitude converter of the "start-stop" type and a standard 100-channel kicksorter. The calibration of the time analyzer can be varied from 1 nsec to 0.1 nsec per channel. In addition to showing the time spread, the display indicates the coincidence resolving time (2To) which is variable from 1 to 100 nsec by means of front panel helipots. The electronic time jitter of the system, as measured with a fast pulser is less than 0.2 nsec. A resolving time of 8 nsec gives 95% coincidence efficiency for coincidences between the annihilation radiation photo-22 peaks from Na22

Keywords

Calibration; Delay effects; Detectors; Displays; Energy resolution; Photomultipliers; Pulse measurements; Rivers; Solid state circuits; Time measurement;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.1964.4323383

Filename

4323383