First tests of the full SIDDHARTA-2 experimental apparatus with a 4 He gaseous target

用于DAΦNE对撞机上介子原子研究的SIDDHARTA-2装置

SIDDHARTA-2 apparatus for kaonic atoms research on the DA$Φ$NE collider

本文介绍了安装在DAΦNE对撞机上的SIDDHARTA-2实验装置，该装置采用硅漂移探测器围绕低温气体靶，旨在首次测量介子氘2p→1s X射线跃迁，以确定同位旋相关的反K介子-核子散射长度。

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

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。

SIDDHARTA-2在DAΦNE上对中等质量奇异原子高-n跃迁的测量

Measurements of high-n transitions in intermediate mass kaonic atoms by SIDDHARTA-2 at DA$\mathrmΦ$NE

SIDDHARTA-2首次测量中等质量奇异原子的高-n跃迁，为低能反K介子-原子核强相互作用研究提供关键参考数据。

A UV laser test bench for micro-pattern gaseous detectors

UV lasers for the calibration of gaseous detectors have seen newfound employment with current-generation micro-pattern gaseous detectors (MPGDs), especially those devices not suitable for tests with traditional sources (e.g. cosmic rays or X-ray beams) by design constraints. An apparatus made of a UV laser designed for the characterization of the fast timing MPGD (FTM) is here described, together with the measurements of gain curve and electron drift velocity performed on a prototype of Time Projection GEM (TPG) to validate the setup.

Viscosity measurements of gaseous H2 between 200 K to 300 K with a spinning rotor gauge

Experimental values for the viscosity of the radioactive hydrogen isotopologue tritium are still unknown in literature. Existing values from ab initio calculations disregard quantum mechanic effects and are therefore only good approximations for room temperature and above. To fill in these missing experimental values, a measurement setup has been designed, to measure the viscosity of gaseous hydrogen and its isotopologues (H$_2$, HD, HT, D$_2$, DT, T$_2$) at cryogenic temperatures. In this paper, the first results with this Cryogenic Viscosity Measurement Apparatus (Cryo-ViMA) of the viscosity…

A new kaonic helium measurement in gas by SIDDHARTINO at the DAΦNE collider

The SIDDHARTINO experiment at the DAΦNE Collider of INFN-LNF, the pilot run for the SIDDHARTA-2 experiment which aims to perform the measurement of kaonic deuterium transitions to the fundamental level, has successfully been concluded. The paper reports the main results of this run, including the optimization of various components of the apparatus, among which the degrader needed to maximize the fraction of kaons stopped inside the target, through measurements of kaonic helium transitions to the 2p level. The obtained shift and width values are ε_2p = E_exp-E_e.m = 0.2 {\pm} 2.5(stat) {\pm} 2(…