Author: Krejcik, P.
Paper Title Page
TUMPL04 LCLS-II Timing Pattern Generator Configuration GUIs 307
  • C. Bianchini, J. Browne, K.H. Kim, P. Krejcik, M. Weaver, S. Zelazny
    SLAC, Menlo Park, California, USA
  The LINAC Coherent Light Source II (LCLS-II) is an upgrade of the SLAC National Accelerator Laboratory LCLS facility to a superconducting LINAC with multiple destinations at different power levels. The challenge in delivering timing to a superconducting LINAC is dictated by the stability requirements for the beam power and the 1MHz rate. A timing generator will produce patterns instead of events because of the large number of event codes required. The poster explains how the stability requirements are addressed by the design of two Graphical User Interfaces (GUI). The Allow Table GUI filters the timing pattern requests respecting the Machine Protection System (MPS) defined Power Class and the electron beam dump capacities. The Timing Pattern Generator (TPG) programs Sequence Engines to deliver the beam rate configuration requested by the user. The low level program, The TPG generates the patterns, which contains the timing information propagated to the Timing Pattern Receiver (TPR). Both are implemented with an FPGA solution and configured by EPICS. The poster shows an overall design of the high-level software solutions that meet the physics requirements for LCLS-II timing.  
slides icon Slides TUMPL04 [1.030 MB]  
poster icon Poster TUMPL04 [0.883 MB]  
DOI • reference for this paper ※  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
Diagnostics and Instrumentation Challenges at LCLS-II  
  • P. Krejcik
    SLAC, Menlo Park, California, USA
  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.  
video icon Talk as video stream:  
slides icon Slides FRAPL04 [9.213 MB]  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)