The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF AU - D'Ewart, J.M. AU - Campell, M.L. AU - Krejcik, P. AU - Loos, H. AU - Luchini, K. ED - Corvetti, Lou ED - Riches, Kathleen ED - Schaa, Volker RW TI - Fast Wire Scanner Upgrade for LCLS J2 - Proc. of ICALEPCS2015, Melbourne, Australia, 17-23 October 2015 C1 - Melbourne, Australia T2 - International Conference on Accelerator and Large Experimental Physics Control Systems T3 - 15 LA - english AB - Wire scanners are a main diagnostic tool for transverse beam size and emittance measurements at LCLS. The original SLAC wire scanners were not optimized for speed (taking minutes to scan), and can't perform at the desired level of position resolution necessary for measuring LCLS' small beam size. A new fast wire scanner, based on a dc linear servo motor, has been designed and installed in the LCLS. The new fast wire scanner has several advantages over the original wire scanner: scan times are reduced from minutes to seconds while minimizing wire vibrations. Rather than counting open-loop step pulses, the new fast wire scanner uses real time position capture for beam synchronous sampling of the wire position, enhancing beam profile accuracy. PB - JACoW CP - Geneva, Switzerland SP - 114 EP - 116 KW - controls KW - real-time KW - emittance KW - interface KW - EPICS DA - 2015/12 PY - 2015 SN - 978-3-95450-148-9 DO - 10.18429/JACoW-ICALEPCS2015-MOPGF015 UR - http://jacow.org/icalepcs2015/papers/mopgf015.pdf ER -