Investigation of instabilities of photomultiplier tubes for multi-element detector systems

Astromskas, V. and Joyce, M.J. and Aspinall, M. (2018) Investigation of instabilities of photomultiplier tubes for multi-element detector systems. Journal of Instrumentation, 13 (10). ISSN 1748-0221

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Abstract

This paper presents an investigation into response of instabilities of EJ-309 liquid scintillator detectors. A brief review of common instabilities associated with the photomultiplier tubes (PMTs) is presented. The energy response, energy linearity and warm-up duration of sixteen EJ-309 detectors coupled to PMTs tested is presented. A single-channel mixed-field analyser digitiser system was used for data acquisition. Furthermore, timing information of the common instability behaviours is presented alongside suggestions on how to correct for such instabilities. The results show that a single-energy energy calibration is sufficient to ensure energy linearity; the detectors must be warmed-up by ~45 minutes before stable response is achieved; the re-warm-up duration depends on the duration of the high voltage supplied to the PMT being switched off. The results indicate that the PMTs take approximately 2 hours to reach "cold" state, where a full warm-up duration must be applied. The reported instability effects will be taken into account when developing a sophisticated auto-calibration methodology for a multi-element scintillator detector system.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Instrumentation
Additional Information:
This is an author-created, un-copyedited version of an article accepted for publication/published in Journal of Instrumentation. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at doi:10.1088/1748-0221/13/10/P10008
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2600/2610
Subjects:
ID Code:
129358
Deposited By:
Deposited On:
09 Jul 2019 13:50
Refereed?:
Yes
Published?:
Published
Last Modified:
22 Oct 2020 05:44