6533b7ddfe1ef96bd1273fef

RESEARCH PRODUCT

The electronics of the energy plane of the NEXT-White detector

V. Herrero-boschJ.f. ToledoM. QuerolJ.j. Gómez-cadenasJ.j. Gómez-cadenasJ.j. Gómez-cadenasRomain EsteveV. ÁLvarezA. LaingJavier RodríguezF. Monrabal

subject

Nuclear and High Energy PhysicsPhotomultiplierPhysics - Instrumentation and DetectorsFOS: Physical sciencesCalorimetryDigital Baseline Restoration7. Clean energy01 natural scienceslaw.inventionTECNOLOGIA ELECTRONICAOpticslaw0103 physical sciencesElectronics010306 general physicsInstrumentationCapacitive couplingPhysics010308 nuclear & particles physicsbusiness.industryDetectorLinearityFront-end electronicsInstrumentation and Detectors (physics.ins-det)CathodeCalometryNoisebusinessEnergy (signal processing)

description

[EN] 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 0.4mV.

yearjournalcountryeditionlanguage
2019-02-01
10.1016/j.nima.2018.11.126https://doi.org/10.1016/j.nima.2018.11.126