The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - UNPB AU - Krejcik, P. ED - Schaa, Volker RW ED - Costa, Isidre ED - Fernández, David ED - Matilla, Ãscar TI - Diagnostics and Instrumentation Challenges at LCLS-II J2 - Proc. of ICALEPCS2017, Barcelona, Spain, 8-13 October 2017 C1 - Barcelona, Spain T2 - International Conference on Accelerator and Large Experimental Control Systems T3 - 16 LA - english AB - LCLS-II is the new superconducting linac-based hard x-ray free electron laser at SLAC and poses a significant new challenge for diagnostics and instrumentation over the present LCLS-I copper linac facility. LCLS-II operates in CW mode with a bunch repetition rate of 1 MHz compared to the pulsed 120 Hz operation at LCLS-I. Tuning and optimization of the beam requires single bunch measurement of beam parameters at up to the full beam rate. We rely on FPGA-based embedded controls and data processing to handle this high bandwidth of data. The presentation will give an overview of the major global systems including the timing and machine protection systems as well as detailing the individual diagnostics for beam position, bunch length, beam size and FEL output required for tuning the machine. PB - JACoW CP - Geneva, Switzerland ER -