Alignment of ADS beta cryostat with wire position monitor  

作　　者：朱洪岩 董岚 门瓴玲 刘璨 李波 

机构地区：[1]Institute of High Energy Physics, Chinese Academy of Sciences

出　　处：《Nuclear Science and Techniques》2015年第4期51-56,共6页核技术（英文）

基　　金：Supported by the Project of Injector I Mechanical&Technical Support System

摘　　要：Wire position monitor(WPM)is designed to monitor contraction of the cold masses during the cooling-down operation in an accelerator driven system.Because of material difference,machining error,assembly error,etc.,each WPM has to be calibrated.The sensing voltage and wire position are of a nonlinear relationship,which is expressed by high order polynomial.Root mean square(RMS)of the polynomial fitting error were 3.8μm and 7.4μm at x and y directions,respectively.The alignment test was carried out on the beta cryostat.Optical instruments were used to verify the WPM measuring results.The differences between WPM measuring results and optical measurements were 0.044 and 0.05 mm in x and y direction,respectively.A significant asymmetric contraction was detected,and asymmetry of material was taken as the main reason through analysis.Wire position monitor （WPM） is designed to monitor contraction of the cold masses during the coollng-aown operation in an accelerator driven system. Because of material difference, machining error, assembly error, etc., each WPM has to be calibrated. The sensing voltage and wire position are of a nonlinear relationship, which is expressed by high order polynomial. Root mean square （RMS） of the polynomial fitting error were 3.8 μm and 7.4 μm at x and y directions, respectively. The alignment test was carded out on the beta cryostat. Optical instruments were used to verify the WPM measuring results. The differences between WPM measuring results and optical measurements were 0.044 and 0.05 mm in x and y direction, respectively. A significant asymmetric contraction was detected, and asymmetry of material was taken as the main reason through analysis.

关 键 词：低温恒温器 监视器 位置 对准 加速器驱动系统 多项式表示 广告 光学测量 

分 类 号：TL503[核科学技术—核技术及应用]