TY  - JOUR
AU  - Alvarez, V.
AU  - Herrero-Bosch, V.
AU  - Esteve, R.
AU  - Laing, A.
AU  - Rodriguez, J.
AU  - Querol, M.
AU  - Monrabal, F.
AU  - Toledo, J. F.
AU  - Gomez-Cadenas, J. J.
PY  - 2019
DA  - 2019//
TI  - The electronics of the energy plane of the NEXT-White detector
T2  - Nucl. Instrum. Methods Phys. Res. A
JO  - Nuclear Instruments & Methods in Physics Research A
SP  - 68
EP  - 76
VL  - 917
PB  - Elsevier Science Bv
KW  - Calorimetry
KW  - Front-end electronics
KW  - Digital baseline restoration
AB  - 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.
SN  - 0168-9002
UR  - http://arxiv.org/abs/1805.08636
UR  - https://doi.org/10.1016/j.nima.2018.11.126
DO  - 10.1016/j.nima.2018.11.126
LA  - English
N1  - WOS:000455016500010
ID  - Alvarez_etal2019
ER  -