  This work describes the LLRF and control system in use for a novel
accelerator structure developed for a compact design operating in C-band
developed by SLAC, with collaboration from RadiaBeam and RadiaSoft. This design
is a pulsed RF/pulsed beam system that only provides minimal monitoring for
control of each two-cavity pair. Available signals include only a forward and
reflected signal for each pair; such a design requires careful consideration of
calibration and power-on routines, as well an understanding of how to correct
for disturbances caused by the entire RF signal chain, including a new SSA,
klystron, and distribution system. An AMD Xilinx RF-SoC with a separate
supervisory computer is the LLRF system core, with on-board pulse-to-pulse
feedback corrections. This work presents the current status of the project, as
well as obstacles and manufacturing plans from the viewpoint of developing for
larger-volume manufacturing.
  This material is based upon work supported by the Defense Advanced Research
Projects Agency under Contract Numbers 140D0423C0006 and 140D0423C0007. The
views, opinions, and/or findings expressed are those of the author(s) and
should not be interpreted as representing the official views or policies of the
Department of Defense or the U.S. Government.
