From March 15th to 18th, the fully Digital Beam Position Measurement System (DBPM) designed by the "Key Laboratory of Technologies of Particle Detection and Electronics, CAS" in School of Physical Sciences, passed the commissioning test successfully and was accepted by the Beam Measurement and Control Department in Shanghai Synchrotron Radiation Facility (SSRF). It is for the first time that Chinese make our own DBPM.
On March 15th, the research group led by Post Doctor Lei Zhao went to SSRF for the commissioning tests for this system. This DBPM was tested in SSRF for the first time last July. After modifications and improvements, this DBPM was approved to achieve a better performance according to the test results. Both the results in laboratory and commissioning tests in SSRF indicate that this DBPM is well qualified for the beam position measurement in TBT (Turn by Turn) and CO (Closed Orbit) mode. As the kernel parameter, the beam position resolution of TBT is better than 1 um, and the acquired position information accords well the optical model of the accelerator and the test results of the Libera Brilliance BPM. In the commissioning test reports, the Beam Measurement and Control Department in SSRF declares that this DBPM can acquire the real beam position and achieves the performance required by the contract; the beam position resolution of TBT is better than Libera Electron and equals with Libera Brilliance.
The Beam Measurement and Control Department in SSRF is satisfied with the commissioning test results and this DBPM prototype system has successfully been accepted; the future research on the product systems was also discussed and a new contract to design three DBPM product systems has been signed.
Key Laboratory of Technologies of Particle Detection and Electronics, CAS
March 19th, 2011
The fully digital beam measurement method is a latest developed technique, which is under research with great effort both in China and abroad. The Libera product of the Instrumentation Technologies is the most advanced BPM system that has been widely applied in the beam position measurement in many accelerator facilities. Recently Key Laboratory of Technologies of Particle Detection and Electronics, CAS has worked on the research in this domain, including beam phase & energy measurement and the beam position measurement based on fully digital processing, which is supported by the National Natural Science Foundation of China (Shubin Liu, 10875119) and the Knowledge Innovation Program of The Chinese Academy of Science(Qi An, Shubin Liu, KJCX2-YW-N27). Through cooptation with the institutes in CAS, the beam measurement systems are successfully designed and applied in the IHEP and SSRF.