Multilayer design of acoustic sensors for dark matter bubble chamber detectors

  1. I. Felis
  2. M. Ardid
  3. J. Ferrer
  4. J. A. Martínez-Mora
Actas:
Tecniacústica 2015: 46º Congreso Español de Acústica ; Encuentro Ibérico de Acústica ; Simposio Europeo sobre Acústica Virtual y Ambisonics

ISSN: 2340-7441

ISBN: 978-84-87985-26-3

Año de publicación: 2015

Páginas: 1656-1663

Tipo: Aportación congreso

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Resumen

PICO Collaboration is using bubble chamber detectors searching for Dark Matter. The detector uses piezoelectric sensors in order to detect the acoustic signal emitted by the bubbles that are created within the superheated fluid when a nuclear recoil is produced therein. These sensors are attached on the outer wall of the vessel containing the superheated fluid. Thus, the design of the acoustic matching by interposing a layer of material between the glass of the vessel and the ceramic is critical. A method of characterization, optimization and design of such piezoelectric sensors is presented through a transmission acoustic multilayer model contrasted by experimental, analytical and numerical methods.