  SLAC National Accelerator Laboratory is collaborating with Arizona State
University to design a LLRF system towards the advancement of the ASU Compact
X-ray Light Source (CXLS). The CXLS is a phased project to develop small
brilliant x-ray sources that may produce coherent x-rays appropriate as a seed
source for LCLS and LCLS II. The CXLS electron beam is produced by an x-band
photoinjector and linac operating at 9.3 GHz RF frequency and 1 kHz repetition
rate with up to 300 pC per bunch. The linac consists of 3 short 20-cell
sections of standing wave linac. The RF gun and linac sections are powered by
two 6 MW transmitters using L3 klystrons and Scandi-nova K1 modulators. The
accelerator will initially operate in single-bunch mode and may be upgraded to
multi-bunch operation at a later date. SLAC National Laboratory has developed a
LLRF system in Advanced Telecommunication Computing Architecture (ATCA) for the
ASU project. This talk will discuss the design of the LLRF for this project and
discuss the ATCA implementation.
