Development of very-thick transparent GEMs with wavelength-shifting capability for noble element TPCs
M. Ku\'zniak, D. Gonz\'alez-D\'iaz, P. Amedo, C.D.R. Azevedo, D.J., Fern\'andez-Posada, M. Ku\'zwa, S. Leardini, A. Leonhardt, T. {\L}\k{e}cki,, L. Manzanillas, D. Muenstermann, G. Nieradka, R. de Oliveira, T. R. Pollmann,, A. Sa\'a Hern\'andez, T. Sworobowicz, C. T\"urko\u{g}lu
TL;DR
This paper introduces a novel very-thick transparent GEM with integrated wavelength-shifting properties, enhancing light collection and resolution in noble element TPCs for dark matter and neutrino detection.
Contribution
It presents a new scalable GEM design made from polyethylene naphthalate with optical properties, improving detection efficiency in TPCs.
Findings
Successful production and characterization of the new GEM
Demonstrated improved light collection efficiency
Potential for enhanced resolution in TPC applications
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.
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