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TY - CONF AU - Sereno, N. AU - Arnold, N.D. AU - Bui, H. AU - Carwardine, J. AU - Decker, G. AU - Emery, L. AU - Farnsworth, R.I. AU - Keane, R.T. AU - Lenkszus, F. AU - Lill, R.M. AU - Lipa, R. AU - Veseli, S. AU - Xu, S. AU - Yang, B.X. ED - Henderson, Stuart ED - Akers, Evelyn ED - Satogata, Todd ED - Schaa, Volker R.W. TI - Beam Stability R&D for the APS MBA Upgrade J2 - Proc. of IPAC2015, Richmond, VA, USA, May 3-8, 2015 C1 - Richmond, VA, USA T2 - International Particle Accelerator Conference T3 - 6 LA - english AB - Beam diagnostics required for the APS MBA are driven by ambitious beam stability requirements. The major AC stability challenge is to correct rms beam motion to 10% the rms beam size at the insertion device source points from 0.01 to 1000 Hz. The vertical plane represents the biggest challenge for AC stability which is required to be 400 nm rms for a 4 micron vertical beam size. Long term drift over a period of 7 days is required to be 1 micron or less. Major diagnostics R&D components are improved rf beam position processing using commercially available fpga based bpm processors, new XRay beam position monitors sensitive only to hard X-rays, mechanical motion sensing and remediation to detect and correct long term drift and a new feedback system featuring a tenfold increase in sampling rate and a several-fold increase in the number of fast correctors and bpms. Feedback system development represents a major effort and we are pursuing development of a novel algorithm that integrates orbit correction for both slow and fast correctors down to DC simultaneously. Finally a new data acquisition system (DAQ) is being developed to acquire streaming data from all diagnostics. PB - JACoW CP - Geneva, Switzerland SP - 1167 EP - 1169 KW - feedback KW - diagnostics KW - insertion KW - controls KW - insertion-device DA - 2015/06 PY - 2015 SN - 978-3-95450-168-7 DO - 10.18429/JACoW-IPAC2015-MOPWI011 UR - http://jacow.org/ipac2015/papers/mopwi011.pdf ER -