Turn-by-turn system and its primary experiment at HLS

Turn-by-turn system and its primary experiment at HLS 1 first-author 1 1 1 1 1 National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029 National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029 During the Phase II project of NSRL, a turn by turn BPM (Beam Position Monitor) system is proposed for storage ring diagnostics which engages log-ratio electronics circuit to measure machine properties of the HLS (Hefei Light Source) storage ring. The log-ratio processor works at 408MHz, twice the RF frequency of HLS. Modern logarithmic amplifiers with wide dynamic range, great bandwidth, good logarithmic conformance, and low cost are attractive for beam position measurements. Injection kicker and the stripline-electrode resonant exciting methods are used to excite beam for nonlinear beam dynamics and phase space studies of stored beam. Up to 2 seconds of data acquisition is ensured. In this paper we present the performance of each component and preliminary test results of the turn-by-turn BPM system. Turn-by-turn BPM Phase-space measurement References Wang J H , Li W M , Sun B G et al . Turn-by-turn system design of HLS , APAC01 , Sept. 2001 , Beijing Turn-by-turn system design of HLS Shafer R E . Log-ratio signal-processing technique for beam position monitors , AIP conf Proc , 1993 , 120 - 128 Log-ratio signal-processing technique for beam position monitors Roberto Aiello G . Log-ratio technique for beam position monitor systems , AIP conf Proc , 1993 , 301 - 310 Log-ratio technique for beam position monitor systems Development report of HLS, inner , October, 1991 Development report of HLS, inner TL594 Supported by National Important Project on Science-Phase Ⅱ of National Synchrotron Radiation Laboratory 2002-07-22 2003-11-01 2021-01-19 2003 Nuclear Science and Techniques 04 14