Development of very-thick transparent GEMs with wavelength-shifting capability for noble element TPCs
AstroCeNT, Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences, Rektorska 4, 00-614, Warsaw, Poland
2 Instituto Galego de Física de Altas Enerxías, Univ. de Santiago de Compostela, Campus Vida, Rúa Xosé María Suŕez Núñez, s/n, 15782, Santiago de Compostela, Spain
3 Institute of Nanostructures, Nanomodelling and Nanofabrication (i3N), Universidade de Aveiro, Aveiro, Portugal
4 CERN, Esplanade des Particules 1, Meyrin, Switzerland
5 Biological and Chemical Research Centre, Faculty of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089, Warsaw, Poland
6 Max Planck Institute for Physics, Munich, Germany
7 Physics Department, Lancaster University, Lancaster, UK
8 Department of Physics, Technische Universität München, 80333, Munich, Germany
9 Nikhef and the University of Amsterdam, Science Park, 1098XG, Amsterdam, The Netherlands
Accepted: 7 June 2021
Published online: 13 July 2021
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.
© The Author(s) 2021
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