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Sensors 2016, 16(6), 860; doi:10.3390/s16060860

Acoustic Sensor Design for Dark Matter Bubble Chamber Detectors

Institut d’Investigació per a la Gestió Integrada de les Zones Costaneres (IGIC), Universitat Politècnica de València (UPV), 46730 Gandia, València, Spain
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Author to whom correspondence should be addressed.
Academic Editor: Stefano Mariani
Received: 17 March 2016 / Revised: 2 June 2016 / Accepted: 3 June 2016 / Published: 10 June 2016

Abstract

Dark matter bubble chamber detectors use piezoelectric sensors in order to detect and discriminate the acoustic signals emitted by the bubbles grown within the superheated fluid from a nuclear recoil produced by a particle interaction. These sensors are attached to the outside walls of the vessel containing the fluid. The acoustic discrimination depends strongly on the properties of the sensor attached to the outer wall of the vessel that has to meet the requirements of radiopurity and size. With the aim of optimizing the sensor system, a test bench for the characterization of the sensors has been developed. The sensor response for different piezoelectric materials, geometries, matching layers, and backing layers have been measured and contrasted with FEM simulations and analytical models. The results of these studies lead us to have a design criterion for the construction of specific sensors for the next generation of dark matter bubble chamber detectors (250 L). View Full-Text
Keywords: dark matter; bubble chamber; piezoelectric sensors; acoustic transducers; acoustic detection; acoustic test bench dark matter; bubble chamber; piezoelectric sensors; acoustic transducers; acoustic detection; acoustic test bench
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Felis, I.; Martínez-Mora, J.A.; Ardid, M. Acoustic Sensor Design for Dark Matter Bubble Chamber Detectors. Sensors 2016, 16, 860.

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