  XeBRA is a flexible cryogenic platform designed to perform research and
development for liquid xenon detectors searching for rare events. Its
extra-large outer cryostat makes it possible to install a wide variety of
detector designs. We present the system, including its cryogenic, gas handling,
data acquisition and slow control subsystems. Two dual phase time projection
chambers with sensitive masses at the 1 kg scale have so far been operated in
XeBRA. Using data from these, we determine the field-dependence of the electron
drift velocity in liquid xenon. We also measure the relative charge and light
yields for 41.5 keV energy deposits from Kr-83m with electric drift fields
between 50 V/cm and 677 V/cm.
