用于CROSS实验的高分辨率数字化系统
High resolution digitization system for the CROSS experiment
摘要：
CROSS的信号数字化是在LSC - Canfranc地下实验室进行的一项用于搜索无中微子双β衰变的测热实验，将基于一种定制解决方案，该解决方案由一个与Altera Cyclone V FPGA模块接口的模数转换板组成。每个模数转换板有12个通道，允许每个通道的数据数字化高达25 ksps，在实验所需的典型采样率（5 ksps）下的有效分辨率为21位。该板还允许以数字方式选择抗混叠滤波器的截止频率，分辨率为10位，范围为24 Hz至2.5 kHz，满足快速校准测辐射热计的要求。FPGA负责模数转换板的同步以及数据到存储的传输，在标准以太网接口上使用UDP协议。每个FPGA可以管理来自8块板（96个通道）的数据，具有出色的可扩展性。在这方面的贡献，我们将提出一个完整的概述系统，并详细描述了系统的性能。
英文摘要：
The signal digitization for CROSS, a bolometric experiment for the search of neutrinoless double beta decay at LSC - Canfranc Underground Laboratory, will be based on a custom solution comprised of an analog-to-digital board interfaced to an Altera Cyclone V FPGA module. Each analog-to-digital board hosts 12 channels that allow data digitization up to 25 ksps per channel and an effective resolution of 21 bits at the typical sample rate required by the experiment (5 ksps). The board also allows to digitally select the cut-off frequency of the anti-aliasing filter with 10 bit resolution from 24 Hz up to 2.5 kHz, as required by fast scintillating bolometers. The FPGA is responsible for the synchronization of the analog-to-digital boards and for the data transfer to the storage, using UDP protocol on a standard Ethernet interface. Each FPGA can manage the data coming from 8 boards (96 channels), allowing an excellent scalability. In this contribution we will present a complete overview of the system, and a detailed characterization of the system performance.
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