光学
流离失所(心理学)
直线粒子加速器
散裂中子源
翻译(生物学)
激光器
CMOS传感器
计算机科学
材料科学
梁(结构)
物理
中子源
图像传感器
中子
核物理学
信使核糖核酸
基因
化学
生物化学
心理治疗师
心理学
作者
Zhenqiang He,Tong Wang,Xiaolong Wang,Lei Shang,Huachang Liu,Xiao Li,Men Lingling,Na Ma,Ke Zhang,Liang Ji,Dong Li,Bo Li
标识
DOI:10.1088/1361-6501/ac656b
摘要
Abstract Alignment of superconducting cavities is one of the important issues for the China Spallation Neutron Source Phase II (CSNS II) linac. In order to obtain the cavity displacement in the process of cooling down to the liquid helium temperature, a laser-based Poisson Spot Monitor (PSM) system was newly proposed and a verification system in the laboratory was built. The PSM system uses the diffraction spot formed on the CMOS camera after a beam of parallel laser passes through a spherical target to monitor the position of the measured object, where the spherical target is fixed on the monitored object. The displacement during the cooling process of the cryomodule is replaced by the movement of the high-precision two-axis motorized translation stage. A spherical target is fixed on the translation stage as the monitoring object. A beam of parallel laser passes through the spherical monitoring target to form a Poisson spot image on a CMOS camera. The coordinates of the Poisson spot center are obtained through image processing. Through experiments, the PSM system obtained a high accuracy within 5μm, which meets the displacement monitoring requirement of the CSNS II cryomodule components. The system is fairly simple and able to be constructed without highly specialized parts and can also be used in other high-precision alignment and monitoring fields.
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