My formal training is in experimental nuclear physics (Ph.D. UNC 1989). I did a two-year post doc in x-ray metrology at NIST, and a year here at APS learning dynamical diffraction. Since then, I've been writing beamline-control and data-acquisition software for the APS. Tim Mooney (mooney@aps.anl.gov) (630)252-5417 Beamline Controls & Data Acquisition Group Advanced Photon Source, Argonne National Lab