The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF AU - Caracappa, A. AU - Danneil, C. AU - Della Penna, A.J. AU - Fliller, R.P. AU - Padrazo, D. AU - Singh, O. ED - Schaa, Volker RW TI - A PPS Compliant Stored Beam Current Monitor at NSLS-II J2 - Proc. of IBIC2016, Barcelona, Spain, Sept. 13-18, 2016 C1 - Barcelona, Spain T2 - International Beam Instrumentation Conference T3 - 5 LA - english AB - A requirement for top-off operations at the NSLS-II facility is at least 50mA stored ring current. The Stored Beam Current Monitor (SBCM) is part of the NSLS-II Personnel Protection System (PPS) that determines the storage ring current based on Pick-Up Electrode (PUE) readings. The SBCM selects the 500 MHz component of the PUE signal and downconverts it to about 2 MHz. The 2 MHz signal is rectified, averaged down to a bandwidth of 500 Hz, and compared to a threshold voltage equivalent to 55mA of stored beam. A redundant SBCM system was also constructed and these two systems must agree that the stored beam is above the threshold to enable top-off operations. The SBCM is also required to remain accurate over wide range of possible bunch patterns and bunch intensity distributions. Under normal conditions for top-off operations the SBCM measurement accuracy is about 1%. The SBCM was commissioned in 2015 as part of the Top-Off Safety System (TOSS) which is responsible for ensuring safe top-off operations at NSLS-II. PB - JACoW CP - Geneva, Switzerland SP - 427 EP - 430 KW - operation KW - storage-ring KW - PLC KW - monitoring KW - diagnostics DA - 2017/02 PY - 2017 SN - 978-3-95450-177-9 DO - 10.18429/JACoW-IBIC2016-TUPG38 UR - http://jacow.org/ibic2016/papers/tupg38.pdf ER -