supported by the Youth Innovation Promotion Association CAS (Nos. 2019013 and Y202005);the National Natural Science Foundation of China (No. 11975254)
At the High Energy Photon Source (HEPS),a high orbital stability of typically 10% of the beam size and angular divergence must be achieved.The beam size at the insertion devices is 10μm horizontally and 1μm vertical...
supported by the National Key Research and Development Program of China(No.2016YFA0401903);National Natural Science Foundation of China(No.12175293);the Young and Middle-Aged Leading Scientists;Engineers and Innovators through the Ten Thousand Talent Program。
To achieve high-efficiency operation of the highgain free-electron laser(FEL),the electron beams and radiated photon beams need to be overlapped precisely and pass through the entire undulator section.Therefore,a high...
partially supported by the National Natural Science Foundation of China(Nos.11575282 and 11305253)
In order to pursue high-precision beam position measurements for free-electron laser facilities, a cavity beam position monitor(CBPM) is employed to measure the transverse position that can meet the requirement of pos...
Supported by the Natural Science Foundation of China(Nos.11175173,11375178 and 11005105)
The four electrodes in the stripline beam position monitor(BPM) for Hefei Light Source(HLS II) storage ring are of axially symmetric type. We have derived a new calibration method of electrode gains for this type stri...
Supported by National Natural Science Foundation of China(No.11075198)
Beam position monitors(BPMs)have been widely used in all kinds of measurement systems,feedback systems and other areas in particle accelerator field these days.The malfunction of a single BPM can cause serious consequ...
Supported by National Natural Science Foundation(Grant No.11075198)
Cavity beam position monitor(BPM) is widely used in a precise electron beam position measurement. Based on high performance oscilloscope-embedded EPICS input/output controller,we developed an on-line cavity BPM signal...
Supported by the Knowledge Innovation Program of Chinese Academy of Science (KJCX2-YW-N27);the National Natural Science Foundation of China(10875119),and the 100-Talents Program of CAS
An embedded single-board computer (SBC) system based on AT91RM9200 was designed for monitoring and controlling the digital beam position monitor system of Shanghai Synchrotron Radiation Facility (SSRF) through the Vir...
Supported by the Natural Science Foundation of China (10875117);the National "985 Project" (173123200402002)
An S-band cavity BPM is designed for a new injector for HLS (Hefei Light Source). It consists of two cavities that work on 2448 MHz: a re-entrant position cavity tuned to TM110 mode and a reference cavity tuned to TM0...
SSRF diagnostics system will adopt a new generation digital electron beam position processor,Libera,as the signal condition,signal processing and data acquisition device for beam position monitor.In order to provide a...
The beam-based alignment system is given in HLS (Hefei Light Source), in which a switchable shunt resistorwas installed on quadrupole to bypass a small percentage of the magnet current. The system can measureBPM-to-qu...