KB镜束流截面测量系统研制  

Development of beam profile monitor using Kirkpatrick Baez mirrors

作　　者：祝德充 岳军会[1] 随艳峰[1] 季大恒 曹建社[1] 叶恺容[3] 陈杰[3] 田顺强[3] 冷用斌[3] 

机构地区：[1]中国科学院高能物理研究所,粒子加速物理与技术重点实验室,北京100049 [2]中国科学院大学,北京100049 [3]中国科学院上海应用物理研究所,上海201800

出　　处：《强激光与粒子束》2018年第4期136-140,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11605213)

摘　　要：为了对衍射极限储存环的束流横向截面尺寸及发射度进行测量,设计了一套Kirkpatrick-Baez(KB)反射镜聚焦成像系统,并在上海光源(SSRF)储存环进行预制研究。该系统主体由两面垂直放置的KB反射镜组成,分别在水平及垂直方向对弯转磁铁光源点进行成像,系统工作在硬X射线波段,聚焦光斑被闪烁体X射线相机采集。对影响系统成像质量的像差和点扩散函数进行了计算。目前,实现了对束流的实时成像,可精确测量束流横向截面尺寸为75.9μm(水平方向)和20.2μm(垂直方向),系统稳定性(RMS)小于0.1μm。A Kirkpatrick Baez mirror imaging system has been designed and installed to measure the beam transverse profile and emittance of SSRF storage ring.The new system could be interchangeable with the original X-pinhole system.Two orthogonal cylindrical mirrors are used to image the dipole source point in the horizontal and vertical directions.Hard X-ray with peak energy of 20.5 keV will be focused at the X-ray scintillator camera.Aberration and point spread function which would cause image blur are evaluated.The system commissioning and optimization have been done.The electron transverse beam size has been measured precisely with horizontal 75.9μm and vertical 20.2μm.The system stability is less than 0.1μm.

关 键 词：KB镜 束流尺寸测量 束流诊断 发射度 同步辐射 

分 类 号：TL594[核科学技术—核技术及应用] TL506