用于高精度K介子原子X射线能谱测量的SIDDHARTA-2校准方法
The SIDDHARTA-2 calibration method for high precision kaonic atoms X-ray spectroscopy measurements
AI总结：
SIDDHARTA-2实验为实现K介子氘X射线高精度测量，研发适配的硅漂移探测器并优化校准方法，将系统误差控制在2-3 eV，保障长周期数据采集的能谱精度。
摘要：
位于DAΦNE对撞机的SIDDHARTA-2实验旨在首次完成K介子氘向基态跃迁的X射线测量，其系统误差需控制在几eV量级。为实现这一具有挑战性的目标，实验装置配备了384个硅漂移探测器（SDDs），分布在低温气态靶周围。SIDDHARTA-2合作组研发的SDD凭借高能量分辨率、高时间分辨率以及抗辐射硬度，适用于高精度K介子原子能谱研究。每个探测器的能量响应必须经过校准和监测，以将由增益波动等过程导致的系统误差控制在2-3 eV的水平。本文介绍了SIDDHARTA-2校准方法，该方法在实验预备阶段于DAΦNE对撞机的真实本底条件下完成优化，是保证系统在长周期数据采集中实现高精度能谱性能的核心工具，而长周期数据采集正是K介子氘测量的必要条件。
英文摘要：
The SIDDHARTA-2 experiment at the DA$Φ$NE collider aims to perform the first kaonic deuterium X-ray transitions to the fundamental level measurement, with a systematic error at the level of a few eV. To achieve this challenging goal the experimental apparatus is equipped with 384 Silicon Drift Detectors (SDDs) distributed around its cryogenic gaseous target. The SDDs developed by the SIDDHARTA-2 collaboration are suitable for high precision kaonic atoms spectroscopy, thanks to their high energy and time resolutions combined with their radiation hardness. The energy response of each detector must be calibrated and monitored to keep the systematic error, due to processes such as gain fluctuations, at the level of 2-3 eV. This paper presents the SIDDHARTA-2 calibration method which was optimized during the preliminary phase of the experiment in the real background conditions of the DA$Φ$NE collider, which is a fundamental tool to guarantee the high precision spectroscopic performances of the system over long periods of data taking, as that required for the kaonic deuterium measurement.
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