A cryogenic waveform digitizer ASIC (CryoSCA) based on switched capacitor array has been developed for HPGe detector array for dark matter (CDEX: China Dark Mat

–作源自清华工物系的技术，高纯锗团队与 cjpl、cdex组保持良好合作 –承担CJPL-II 5台本底高纯锗探测器的研制，拟用于地下放射性测量分析系统 帏恟目标

The scientific goal of the China Dark matter EXperiment (CDEX), located in the China Jinping Underground Laboratory (CJPL), is to detect light dark matter candidates using a high-purity germanium (HPGe) detector array. In 2013, CDEX-1B achieved the most sensitive experimental results for spin-independent WIMPs below $\mathrm {4\ GeV/}c^{2 ...

New HPGe array detector for : Rare decay measurement (Half-life of 180mTa metastable state) Ultra-low radioactivity measurement for 2x ß decay and DM detection

2022年8月1日 · This paper introduces the DAQ architecture of CDEX-100 experiment and the preliminary test results. The target of CDEX-100 experiment is the direct detection of WIMPs and $^{76}Ge$ $0\nu\beta\beta$, it contains 100-kilogram HPGe detectors and is deployed in a large liquid nitrogen thermostat which located in CJPL-II underground laboratory.

2023年8月6日 · CDEX-10X Detector (Bare HPGe detectors in LN 2 ) • Vacuum chamber, structure materials, not conducive to further reduce the radioactive background; • ASIC-based preamplifiers can work well in liquid nitrogen; Develop bare HPGe detectors immersed into LN 2 ! Immerse the detector into liquid nitrogen for about 8 hours, we got a stable leakage ...

•CDEX: unique advantages of Ge detectors for light DM search at CJPL; •Recently CDEX has made great progress, published many leading results for low mass DM, with multi physics channels analysis and different DM candidates; •CDEX-50 has started and will locate in …

2021年9月9日 · Optimizing the energy resolution is effective to improve the sensitivity of 0νββ observation. Combined with the CDEX HPGe detector, under the previous "analog shaping + waveform digitization"...

•What we need for next CDEX-10 project’s electronics? •Architecture for DAQ system, Shaping, FADC, Trigger, Clock distribution, DAQ •Implement of Digitization and Data Compression in FPGA.

IExcellent discrete pre-ampli er designs available, detector can perform with near-theoretical threshold and resolution. ICDEX: Ultra-low threshold preamp (switched reset on PPC) IMAJORANA: Ultra low-background preamp with 500 Ve threshold (PPC detector, short cabling)