PT Journal
AU NEXT Collaboration (Alvarez, Vea
   Carcel, S
   Cervera-Villanueva, A
   Diaz, J
   Ferrario, P
   Gil, A
   Gomez-Cadenas, JJ
   Gonzalez, K
   Liubarsky, I
   Lorca, D
   Martin-Albo, J
   Martinez, A
   Monrabal, F
   Muñoz Vidal, J
   Nebot-Guinot, M
   Rodriguez, J
   Serra, L
   Sorel, M
   Yahlali, N
TI NEXT-100 Technical Design Report (TDR). Executive summary
SO Journal of Instrumentation
JI J. Instrum.
PY 2012
BP T06001 - 34pp
VL 7
DI 10.1088/1748-0221/7/06/T06001
LA English
DE Detector design and construction technologies and materials; Time projection chambers
AB In this Technical Design Report (TDR) we describe the NEXT-100 detector that will search for neutrinoless double beta decay (beta beta 0v) in Xe-136 at the Laboratorio Subterraneo de Canfranc (LSC), in Spain. The document formalizes the design presented in our Conceptual Design Report (CDR): an electroluminescence time projection chamber, with separate readout planes for calorimetry and tracking, located, respectively, behind cathode and anode. The detector is designed to hold a maximum of about 150 kg of xenon at 15 bar, or 100 kg at 10 bar. This option builds in the capability to increase the total isotope mass by 50% while keeping the operating pressure at a manageable level. The readout plane performing the energy measurement is composed of Hamamatsu R11410-10 photomultipliers, specially designed for operation in low-background, xenon-based detectors. Each individual PMT will be isolated from the gas by an individual, pressure resistant enclosure and will be coupled to the sensitive volume through a sapphire window. The tracking plane consists in an array of Hamamatsu S10362-11-050P MPPCs used as tracking pixels. They will be arranged in square boards holding 64 sensors (8 x 8) with a 1-cm pitch. The inner walls of the TPC, the sapphire windows and the boards holding the MPPCs will be coated with tetraphenyl butadiene (TPB), a wavelength shifter, to improve the light collection.
ER