A Hard X-Ray Pinhole Camera System for Fast Electron Bremsstrahlung Measurements in the HL-2A Tokamak
A Hard X-Ray Pinhole Camera System for Fast Electron Bremsstrahlung Measurements in the HL-2A Tokamak
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DOI：
10.1080/15361055.2020.1829457
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发表时间：
2020-11
影响因子：
0.9
通讯作者：
Y. P. Zhang;D. Mazon;J. Zhang;P. Zhang;P. Malard;H. B. Xu;J. Zhou;Y. Peysson;X. Zou;J. Yang;G. Yuan;M. Isobe;X. Song;X. Li;Yi Liu;Z. Shi;M. Xu;X. Duan;the HL-2A Team
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文献类型：
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作者：
Y. P. Zhang;D. Mazon;J. Zhang;P. Zhang;P. Malard;H. B. Xu;J. Zhou;Y. Peysson;X. Zou;J. Yang;G. Yuan;M. Isobe;X. Song;X. Li;Yi Liu;Z. Shi;M. Xu;X. Duan;the HL-2A Team
摘要：最近在HL-2A托卡马克上建立了硬x射线针孔相机系统，用于测量20 ~ 200kev能量范围内快电子的时空分布演化。该摄像机主要由扇形探测器阵列、观测窗、针孔机构和数据处理系统组成。探测器阵列由21个CdTe探测器组成，它们排列在一个极向截面上。摄像机通过安装在赤道平面水平端口上的观察窗垂直观察等离子体。数据处理采用基于现场可编程门阵列技术的快速光谱法实现。摄像机的时间分辨率可达2 ~ 16ms，空间分辨率可达2cm。在2018年的HL-2A实验活动中，使用相机成功测量了低混合波产生的快速电子。本文介绍了该摄像机的性能和初步实验结果，并进行了讨论。
Abstract A hard X-ray pinhole camera system has been recently built at the HL-2A tokamak to measure the evolution of space-time distribution of fast electrons in the energy range of 20 to 200 keV. The camera is mainly composed of a fan-shaped detector array, an observation window, a pinhole mechanism, and a data processing system. The detector array consists of 21 CdTe detectors that are arranged in a poloidal section. The camera views the plasma perpendicularly through an observation window mounted in a horizontal port on the equatorial plane. The data processing is implemented by a fast spectrometry based on field-programmable gate array technology. The time and space resolution of the camera can reach 2 to 16 ms and 2 cm, respectively. During the HL-2A experiment campaign in 2018, measurements of fast electrons produced by lower hybrid waves using the camera were successfully performed. The performance of the camera and the first experimental results with some discussions are presented in this paper.