Calibration of Troitsk Nu-Mass Detector Readout Electronics by Signal Digital Filters

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Abstract

We present the results of tuning and calibration of the detector electronics in the signal digitization mode. The goal of the experiment is to search for a possible sterile neutrino signature in tritium beta-decay. The read-out electronics work in direct oscilloscope mode, which requires to optimize time frame the with the goal to minimize noise and energy resolution. We use a 7-pixel silicon drift detector (SDD) and a CMOS charge sensitive preamplifier with very low integration capacitor. Amplifier forms a slowly rising output shape and operates in pulse-reset mode. The 125 MHz ADC digitizes the signals. Using calibration data from Fe55 and Am241 gamma sources we check triangular and trapezoid digital filters to obtain the best noise and energy resolution performance. We are also examining the option to differentiate the output signal.

About the authors

S. B Abdiganieva

Institute for Nuclear Research, Russian Academy of Sciences; Moscow Institute of Physics and Technology

Email: pantuev@inr.ru
117312, Moscow, Russia; 141700, Dolgoprudny, Moscow oblast, Russia

A. I Berlev

Institute for Nuclear Research, Russian Academy of Sciences

Email: pantuev@inr.ru
117312, Moscow, Russia

M. A Bochkov

Institute for Nuclear Research, Russian Academy of Sciences; Moscow Institute of Physics and Technology

Email: pantuev@inr.ru
117312, Moscow, Russia; 141700, Dolgoprudny, Moscow oblast, Russia

N. A Likhovid

Institute for Nuclear Research, Russian Academy of Sciences

Email: pantuev@inr.ru
117312, Moscow, Russia

V. S Pantuev

Institute for Nuclear Research, Russian Academy of Sciences; Moscow Institute of Physics and Technology

Email: pantuev@inr.ru
117312, Moscow, Russia; 141700, Dolgoprudny, Moscow oblast, Russia

S. V Zadorozhnyy

Institute for Nuclear Research, Russian Academy of Sciences

Author for correspondence.
Email: pantuev@inr.ru
117312, Moscow, Russia

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