Cryogenic CMOS cameras for high voltage monitoring in liquid argon. (16th March 2017)

• Record Type: Journal Article
• Authors: McConkey, N.; Spooner, N.; Thiesse, M.; Wallbank, M.; Warburton, T.K.
• Is Part Of: Journal of instrumentation. Volume 12:Number 3(2017:Mar.)
• Page Start: P03014
• Page End: P03014
• Publication Date: 2017-03-16
• Subjects: Cryogenic detectors -- Optical detector readout concepts -- Time projection Chambers (TPC); Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/12/03/P03014
• Languages: English
• ISSNs: 1748-0221

Abstract

Abstract: The prevalent use of large volume liquid argon detectors strongly motivates the development of novel readout and monitoring technology which functions at cryogenic temperatures. This paper presents the development of a cryogenic CMOS camera system suitable for use inside a large volume liquid argon detector for online monitoring purposes. The characterisation of the system is described in detail. The reliability of such a camera system has been demonstrated over several months, and recent data from operation within the liquid argon region of the DUNE 35 t cryostat is presented. The cameras were used to monitor for high voltage breakdown inside the cryostat, with capability to observe breakdown of a liquid argon time projection chamber in situ. They were also used for detector monitoring, especially of components during cooldown.