基于低温量热器的无中微子双贝塔衰变探测实验国内外研究进展

无中微子双贝塔衰变过程能够揭示中微子的粒子属性，打破标准模型的轻子数守恒，并且是目前获得中微子有效质量的重要途径. 本文通过对国内外无中微子双贝塔衰变探测实验的最新研究进展进行详细调研，重点对基于低温量热器的无中微子双贝塔衰变实验设计方案进行深入研究，并以意大利格兰萨索地下实验室（cryogenic underground observatory for rare events，CUORE）实验方案为例，详细地阐述了低温量热器技术的系统组成、工作原理以及现阶段所面临的关键难点，将要解决的问题主要包括极低温环境的搭建、核素种类的选取与探测塔的搭建、本底的甄别和微弱信号的前置放大. 

Progress report on neutrinoless double beta decay detection by bolometer

Neutrinoless double beta decay can only take place if the neutrino is a massive Majorana particle. If found to exist, this reaction violates the lepton number conservation of the standard model and detects the effective Majorana neutrino mass. In this paper, we studied the latest experimental progress on neutrinoless double beta decay detection, particularly focus on Cryogenic Underground Observatory for Rare Events （CUORE） experiment at Gran Sasso National Laboratories in Italy. System composition and working principles of bolometer, crucial technological challenges are studied and discussed mainly including how to build the cryogenic environment and detector tower, select crystals’ nuclides, discriminate background and design preamplifier for weak signal detection.