~X-ray Exposure Device~
A direct drive motor that carries an Iron-55 sample on the armature. Instead of conventional windings a PCB serves as both the stator and the mechanical baseplate making it intrinsically vacuum compatible. The rotor/ source carrier needs to be quite well balanced as the motor's torque is only about ~5N-Cm.
Installed in LSST production cryostat.
XED installed in MMC (R&D Cryostat)
An array of four XEDs in the LSST Test and Commissioning Cryostat
XED "quad" controller for LSST Test and Commissioning Cryostat.