Development of a semi-cylindrical time projection chamber prototype for ( $$^{3}{\textrm{He}},t$$ 3 He , t ) charge exchange reaction experiment
Development of a semi-cylindrical time projection chamber prototype for ( $$^{3}{\textrm{He}},t$$ 3 He , t ) charge exchange reaction experiment
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DOI：
10.1140/epjc/s10052-023-12170-x
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发表时间：
2023-11
期刊：
影响因子：
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通讯作者：
Zhixuan He;Meng Li;Wenjuan Bu;Chaoyuan Xiao;Xianglun Wei;Yuansheng Yang;Zhi Qin;Shanhaowei He-Shanh
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文献类型：
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作者：
Zhixuan He;Meng Li;Wenjuan Bu;Chaoyuan Xiao;Xianglun Wei;Yuansheng Yang;Zhi Qin;Shanhaowei He-Shanh
电荷交换（CE）反应是研究原子核在同位旋维结构的一种有效的探针，人们对它的研究已有几十年的历史。为了扩大CE反应研究的核范围，研究不稳定核的结构特征，包括同位旋对称性、自旋-同位旋激发和核对称能，设计并建造了半圆柱形时间投影室（scTPC）原型，用于（He，t）CE反应的逆运动学探测.采用266 nm紫外激光器实现了电子漂移速度的标定。对Am源发射粒子的能量分辨率（FWHM）为5.6%。scTPC的位置分辨率采用剩余方法描述。垫平面上的空间分辨率为409 m。在漂移方向上的位置分辨率为326米，相当于0.4的角分辨率。这些性能表明scTPC可以精确地测量粒子的运动轨迹. scTPC样机的研制成功为下一步实验数据的分析和处理提供了更好的条件。
The charge exchange (CE) reaction is an effective probe to study the structure of atomic nuclei in the isospin dimension, which has been studied for decades. To expand the range of nuclei studied by CE reactions to a wider range and research the structure characteristics of unstable nuclei, including the isospin symmetry, spin-isospin excitation, and nuclear symmetry energy, a semi-cylindrical time projection chamber (scTPC) prototype was designed and constructed to probe (He,t) CE reactions in inverse kinematics. The 266 nm UV laser was used to achieve electron-drift-velocity calibration. The scTPC has an energy resolution (FWHM) of 5.6% forparticles emitted byAm radioactive source. The position resolution of scTPC is described by theresidualmethod. The spatial resolution on the pad plane is 409m. And the position resolution in the drift direction is 326m, equivalent to an angular resolution of 0.4. These performances suggest that the scTPC can measureand particle tracks precisely. The successful development of the scTPC prototype provides better conditions for the next step of experimental data analysis and processing.