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Development of very-thick transparent GEMs with wavelength-shifting capability for noble element TPCs

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  • M. Kuźniak
  • D. González-Díaz
  • P. Amedo
  • C.D.R. Azevedo
  • D.J. Fernández-Posada
  • M. Kuźwa
  • S. Leardini
  • A. Leonhardt
  • T. Łȩcki
  • L. Manzanillas
  • D. Muenstermann
  • G. Nieradka
  • R. de Oliveira
  • T.R. Pollmann
  • A. Saá Hernández
  • T. Sworobowicz
  • C. Türkoğlu
  • S. Williams
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Article number609
<mark>Journal publication date</mark>31/07/2021
<mark>Journal</mark>European Physical Journal C: Particles and Fields
Issue number7
Volume81
Number of pages7
Publication StatusPublished
Early online date13/07/21
<mark>Original language</mark>English

Abstract

A new concept for the simultaneous detection of primary and secondary scintillation in time projection chambers is proposed. Its core element is a type of very-thick GEM structure supplied with transparent electrodes and machined from a polyethylene naphthalate plate, a natural wavelength shifter. Such a device has good prospects for scalability and, by virtue of its genuine optical properties, it can improve on the light collection efficiency, energy threshold and resolution of conventional micropattern gas detectors. This, together with the intrinsic radiopurity of its constituting elements, offers advantages for noble gas and liquid based time projection chambers, used for dark matter searches and neutrino experiments. Production, optical and electrical characterization, and first measurements performed with the new device are reported.