​SAREC is the SLAC Accelerator Research Experimental Program Committee and it reviews all experimental proposal for FACET (and other research accelerators at SLAC). The following URL the charge of the SAREC committee and its most recent committee members.

https://slacportal.slac.stanford.edu/sites/ard_public/facet/sarec/Pages/default.aspx

Not to be confused by SAREK who was Spock's father in the late 60's science fiction TV series "Star Trek".