The Performance Of The Scrit Detectors For Electron-RI Scattering Experiment
The Performance Of The Scrit Detectors For Electron-RI Scattering Experiment
复制标题
电子-RI散射实验用Scrit探测器的性能
DOI：
10.22323/1.281.0092
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
K. Yamada
中科院分区：
文献类型：
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作者：
A. Enokizono;K. Adachi;T. Fujita;M. Hara;M. Hori;T. Hori;S. Ichikawa;Keita Kasama;K. Kurita;K. Namba;T. Ohnishi;S. Sasamura;T. Suda;T. Tamae;K. Tsukada;M. Togasaki;N. Uchida;M. Wakasugi;Shou;Masamitsu Watanabe;K. Yamada
在RIKEN建造了SCRIT（自约束RI离子靶）装置，使电子RI散射实验在世界上首次成为可能。在SCRIT，散射电子的角动量分布由WiSES（电子散射窗框光谱仪）测量，该光谱仪由偶极磁体和前/后漂移室组成，覆盖80 mSr的立体角，内禀动量分辨率为$\Delta p/p\sim10^{-3}$。此外，电子-RI散射的亮度是根据LMon（亮度监测器）测量的韧致辐射光子来估计的，以获得散射的绝对横截面。LMon由测量光子能量的CsI量热计和测量韧致辐射光子的2D命中分布的塑料纤维衰减器组成。在2015-2016年的第一次物理实验中，使用$^{132}\rm\在这篇文章中，我们介绍了通过使用$^{132}\rm $的实验数据获得的WiSES和LMon检测器的性能。
The SCRIT (Self-Confining RI Ion Target) facility has been constructed at RIKEN to make the electron-RI scattering experiment possible for the first time in the world. At SCRIT, the angular momentum distribution of scattered electrons is measured by WiSES (Window-frame Spectrometer for Electron Scattering) which consists of a dipole magnet and front/rear drift chambers, covering a solid angle of $\sim$80 mSr with an intrinsic momentum resolution of $\Delta p/p\sim10^{-3}$. Also the luminosity of the electron-RI scattering is estimated from bremsstrahlung photons measured by LMon (Luminosity Monitor) to obtain the absolute cross-section of the scattering. The LMon consists of a CsI calorimeter to measure the photon energy, and plastic fiber scintillators to measure the 2D hit distribution of the bremsstrahlung photons. In 2015-2016 the first physics experiment has been performed using $^{132}\rm Xe$ target, then the luminosity and angular distributions were successfully measured at the electron beam energy of 150-300 MeV, achieving a luminosity above $10^{27}cm^{-2}$s$^{-1}$. In this article, we present the performances of the WiSES and LMon detectors obtained by using the $^{132}\rm Xe$ experiment data.