An intelligent instrument for low beam current measurement based on the microprocessor MSC1210 has been developed for the Faraday cups in the HIRFL-CSR beam diagnostic system. The system consists of the data acquisiti...An intelligent instrument for low beam current measurement based on the microprocessor MSC1210 has been developed for the Faraday cups in the HIRFL-CSR beam diagnostic system. The system consists of the data acquisition, data analysis, and data display. The low beam current from FC is measured automatically by the system through signal acquisition, signal transformation, signal amplification, pulse signal shape rectification, A/D conversion, data treatment and result display. The structure diagram of the low beam current measurement system is shown in Fig. 1.展开更多
上海软X射线自由电子激光装置(Shanghai Soft X-ray Free Electron Laser,SXFEL)需1个分辨率达到亚μm量级的束流位置测量系统,并采用基于束流准直的方法实现波荡器段电子束与光子束的紧密重合。为此设计研制了1个由C波段腔式探头、单...上海软X射线自由电子激光装置(Shanghai Soft X-ray Free Electron Laser,SXFEL)需1个分辨率达到亚μm量级的束流位置测量系统,并采用基于束流准直的方法实现波荡器段电子束与光子束的紧密重合。为此设计研制了1个由C波段腔式探头、单路混频至低中频的射频前端以及自主研发的专用数字信号束流位置处理器(digital beam position monitor processor,DBPM)构成的腔式束流位置测量(cavity beam position monitor,CBPM)系统。本文对系统的设计、软硬件结构、系统搭建进行了介绍,并基于漂移段搭建的3个紧邻的CBPM阵列完成了在线系统性能评估。束流实验结果表明,在束团电荷量为500 pC、系统动态范围在±800μm的条件下,位置分辨率可达880 nm,这也是国内首次研制成功可在线运行的具有亚μm位置分辨率的CBPM系统。此外,采用CBPM的相位腔进行相对束团电荷量、束团到达时间的测量,其性能评估结果也均优于SXFEL设计要求。展开更多
文摘An intelligent instrument for low beam current measurement based on the microprocessor MSC1210 has been developed for the Faraday cups in the HIRFL-CSR beam diagnostic system. The system consists of the data acquisition, data analysis, and data display. The low beam current from FC is measured automatically by the system through signal acquisition, signal transformation, signal amplification, pulse signal shape rectification, A/D conversion, data treatment and result display. The structure diagram of the low beam current measurement system is shown in Fig. 1.
文摘上海软X射线自由电子激光装置(Shanghai Soft X-ray Free Electron Laser,SXFEL)需1个分辨率达到亚μm量级的束流位置测量系统,并采用基于束流准直的方法实现波荡器段电子束与光子束的紧密重合。为此设计研制了1个由C波段腔式探头、单路混频至低中频的射频前端以及自主研发的专用数字信号束流位置处理器(digital beam position monitor processor,DBPM)构成的腔式束流位置测量(cavity beam position monitor,CBPM)系统。本文对系统的设计、软硬件结构、系统搭建进行了介绍,并基于漂移段搭建的3个紧邻的CBPM阵列完成了在线系统性能评估。束流实验结果表明,在束团电荷量为500 pC、系统动态范围在±800μm的条件下,位置分辨率可达880 nm,这也是国内首次研制成功可在线运行的具有亚μm位置分辨率的CBPM系统。此外,采用CBPM的相位腔进行相对束团电荷量、束团到达时间的测量,其性能评估结果也均优于SXFEL设计要求。
