FACET (Facility for Advanced Accelerator Experimental Tests):
FACET is not currently operating and is undergoing upgrades- for more information, please see details on FACET-II. FACET's unique electron and positron beams provide a broad range of science opportunities from advanced accelerator R&D to materials science research. FACET is the only facility in world with the high intensity drive bunches necessary for high-gradient plasma and dielectric wakefield acceleration. Our infrastructure includes high brightness terahertz (THz) sources, a 20 TW laser and multi-purpose vacuum chambers .... for more details on FACET  .... for more details on FACET-II

NLCTA (Next Linear Collider Test Accelerator):
NLCTA is an extremely versatile facility that currently hosts programs in accelerator physics, advanced light source R&D and medicine. The 60-150 MeV high-brightness electron beam linear accelerator and extensive infrastructure can be adapted to support a wide range of studies. The facility currently runs programs in free electron laser seeding, dielectric laser acceleration and medical studies. .... for more details   

ESTB (End Station (A) Test Beams):
ESTB uses 5 Hz of the LCLS beam and is used for detector R&D, beamline instrumentation tests, irradiation studies and accelerator experiments. It can provide a varied range of beam energies (2 to 16 GeV) and beam intensities that range from very clean single electrons or up to a billion electrons per bunch ....for more details