Bubble dynamics in Liquid Hole Multipliers. (6th September 2021)

• Record Type: Journal Article
• Authors: Tesi, A.; Segre, E.; Leardini, S.; Breskin, A.; Kapishnikov, S.; Moleri, L.; Vartsky, D.; Bressler, S.
• Is Part Of: Journal of instrumentation. Volume 16:Number 9(2021)
• Publication Date: 2021-09-06
• Subjects: Micropattern gaseous detectors (MSGC, GEM, THGEM, RETHGEM, MHSP, MICROPIC, MICROMEGAS, InGrid, etc) -- Noble liquid detectors (scintillation, ionization, double-phase) -- Charge transport, multiplication and electroluminescence in rare gases and liquids -- Detector modelling and simulations II (electric fields, charge transport, multiplication and induction, pulse formation, electron emission, etc); Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/16/09/P09003
• Languages: English
• ISSNs: 1748-0221

Abstract

Abstract: In bubble-assisted Liquid Hole Multipliers (LHM), developed for noble-liquid radiation detectors, the stability of the bubble and the electro-mechanical properties of the liquid-to-gas interface play a dominant role in the detector performance. A model is proposed to evaluate the static equilibrium configurations of a bubble sustained underneath a perforated electrode immersed in a liquid. For the first time bubbles were optically observed in LAr; their properties were studied in contact with different material surfaces. This permitted investigating the bubble-electrodynamics via numerical simulations; it was shown that the electric field acts as an additional pressure term on the bubble meniscus. The predictions for the liquid-to-gas interface were successfully validated using X-ray micro-CT in water and in silicone oil at STP. The proposed model and the results of this study are an important milestone towards understanding and optimizing the parameters of LHM-based noble-liquid detectors.