摘要：An S-band cavity BPM is designed for a new injector in National Synchrotron Radiation Laboratory. A re-entrant position cavity is tuned to the TM110 mode as position cavity. Cut-through waveguides are used as pickups to suppress the monopole signal. Theoretical resolution of this design is 31 nm. A prototype cavity BPM system is manufactured for off-line cold tests. The wire scanning method is used to calibrate the BPM and estimate the performance of the on-line BPM system. A cross-talk problem has been detected during the cold test. Racetrack cavity BPM design can be used to suppress the cross-talk. With the nonlinear effect being ignored, transform matrix can be used to correct cross-talk. Analysis of cold test results shows that the position resolution of prototype BPM is better than 3 μm.

摘要：Diffraction limited electron storage ring is considered a promising candidate for future light sources,whose main characteristics are higher brilliance,better transverse coherence and better *** challenge of diffraction limited storage ring design is how to achieve the ultra low beam emittance with acceptable nonlinear *** linear and nonlinear parameter optimization methods based on Artificial Intelligence were developed for the storage ring physical *** an example of application,partial physical design of HALS(hefei Advanced Light Source),which is a diffraction limited VUV and soft X-ray light source,was *** emittance growth due to the Intra Beam Scattering effect,which is the main obstacle to achieve ultra low emittance,was estimated quantitatively and possible cures were *** is inspiring that better performance of diffraction limited storage ring can be achieved in principle with careful parameter optimization.

摘要：本文介绍了用单光子计数法测量束团纵向精细结构的原理 .介绍了合肥同步辐射光源测量束团纵向精细结构的单光子计数系统的设计 .由于单光子计数法具有高时间分辨率(2 ps)和大的动态测量范围 (1 0 5)等优点 ,所以该系统不仅可以测量束团长度 ,而且可以精密测量单束团的纯净度 .最后 ,分析了该系统的性能 ,并讨论了该系统在尾场和纵向阻抗的研究、束团伸长效应的研究以及影响单束团不纯净机理的研究中的应用 .

摘要：系统提出了一种新的腔式束流位置监测器(BPM),即跑道型腔式BPM,并使用微波工作室软件进行了理论研究和模拟计算,提出了通用设计方法。跑道型腔式BPM的金属腔部分具有跑道形横截面,引出束流位置偏移激励起的一对偶极模式作为束流位置信号。该方案的偶极模式极化方向固定,频率分离,可以解决随机误差产生的横向串扰问题,其理论位置分辨力可以达到15 nm。