Author/Authors :
Ferry، نويسنده , , S. and Guilloux-Viry، نويسنده , , F. and Anvar، نويسنده , , S. and Chateau، نويسنده , , F. and Delagnes، نويسنده , , E. and Gautard، نويسنده , , V. and Louis، نويسنده , , F. and Monmarthe، نويسنده , , E. and Le Provost، نويسنده , , H. and Russo، نويسنده , , S. and Schuller، نويسنده , , Rafa? and Stolarczyk، نويسنده , , Th. and Vallage، نويسنده , , B. and Zonca، نويسنده , , E.، نويسنده ,
Abstract :
SCOTT is an ASIC designed for the readout electronics of photomultiplier tubes developed for KM3NeT, the cubic-kilometer scale neutrino telescope in Mediterranean Sea. To digitize the PMT signals, the multi-time-over-threshold technique is used with up to 16 adjustable thresholds. Digital outputs of discriminators feed a circular sampling memory and a “first in first out” digital memory. A specific study has shown that five specifically chosen thresholds are suited to reach the required timing accuracy. A dedicated method based on the duration of the signal over a given threshold allows an equivalent timing precision at any charge. To verify that the KM3NeT requirements are fulfilled, this method is applied on PMT signals digitized by SCOTT.
Keywords :
ASIC , Neutrino detection , KM3NeT , PMT , Time-over-threshold , PMT signal processing
