%0 Journal Article
%T The electronics of the energy plane of the NEXT-White detector
%A Alvarez, V.
%A Herrero-Bosch, V.
%A Esteve, R.
%A Laing, A.
%A Rodriguez, J.
%A Querol, M.
%A Monrabal, F.
%A Toledo, J. F.
%A Gomez-Cadenas, J. J.
%J Nuclear Instruments & Methods in Physics Research A
%D 2019
%V 917
%I Elsevier Science Bv
%@ 0168-9002
%G English
%F Alvarez_etal2019
%O WOS:000455016500010
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3868), last updated on Thu, 17 Jan 2019 19:21:22 +0000
%X This paper describes the electronics of NEXT-White (NEW) detector PMT plane, a high pressure xenon TPC with electroluminescent amplification (HPXe-EL) currently operating at the Laboratorio Subterraneo de Canfranc (LSC) in Huesca, Spain. In NEXT-White the energy of the event is measured by a plane of photomultipliers (PMTs) located behind a transparent cathode. The PMTs are Hamamatsu R11410-10 chosen due to their low radioactivity. The electronics have been designed and implemented to fulfill strict requirements: an overall energy resolution below 1% and a radiopurity budget of 20 mBq unit(-1) in the chain of Bi-214. All the components and materials have been carefully screened to assure a low radioactivity level and at the same time meet the required front-end electronics specifications. In order to reduce low frequency noise effects and enhance detector safety a grounded cathode connection has been used for the PMTs. This implies an AC-coupled readout and baseline variations in the PMT signals. A detailed description of the electronics and a novel approach based on a digital baseline restoration to obtain a linear response and handle AC coupling effects is presented. The final PMT channel design has been characterized with linearity better than 0.4% and noise below 0.4 mV.
%K Calorimetry
%K Front-end electronics
%K Digital baseline restoration
%R 10.1016/j.nima.2018.11.126
%U http://arxiv.org/abs/1805.08636
%U https://doi.org/10.1016/j.nima.2018.11.126
%P 68-76