The electronics, trigger and data acquisition system for the liquid argon time projection chamber of the DarkSide-50 search for dark matter
The electronics, trigger and data acquisition system for the liquid argon time projection chamber of the DarkSide-50 search for dark matter
复制标题
DOI：
10.1088/1748-0221/12/12/p12011
复制
发表时间：
2017-12-01
影响因子：
1.3
通讯作者：
Zuzel, G.
中科院分区：
文献类型：
--
作者：
Agnes, P.;Albuquerque, I. F. M.;Zuzel, G.
DarkSide-50实验是在Gran Sasso的Nazionali实验室进行的，使用一个双相时间投影室，以50公斤低放射性氩作为目标，寻找暗物质。来自氩中相互作用的光信号由38个光电倍增管（PMT）的系统检测，其中19个在氩低温恒温器内的TPC体积上方，19个在氩低温恒温器内的TPC体积下方。我们描述了处理来自光电倍增器的信号的电子设备，识别感兴趣的事件的触发系统，以及记录数据以供进一步分析的数据采集系统。电子设备包括PMT上的电阻分压器、直接安装在液氩中PMT分压器上的定制前置放大器以及定制放大器/鉴别器（室温下）。放大后的PMT信号在CAEN波形数字化仪中进行数字化，并使用CAEN逻辑模块来构建触发器; TPC的数据采集系统基于Fermilab artsign软件。该系统自2014年初开始运行。
The DarkSide-50 experiment at the Laboratori Nazionali del Gran Sasso is a search for dark matter using a dual phase time projection chamber with 50 kg of low radioactivity argon as target. Light signals from interactions in the argon are detected by a system of 38 photo-multiplier tubes (PMTs), 19 above and 19 below the TPC volume inside the argon cryostat. We describe the electronics which processes the signals from the photo-multipliers, the trigger system which identifies events of interest, and the data-acquisition system which records the data for further analysis. The electronics include resistive voltage dividers on the PMTs, custom pre-amplifiers mounted directly on the PMT voltage dividers in the liquid argon, and custom amplifier/discriminators (at room temperature). After amplification, the PMT signals are digitized in CAEN waveform digitizers, and CAEN logic modules are used to construct the trigger; the data acquisition system for the TPC is based on the Fermilab artdaq software. The system has been in operation since early 2014.