NOBUGS 2004 Conference

New Opportunities for Better User Group Software

October, 18-20, 2004 at PSI, Switzerland

Abstract Submitted for NOBUGS2004

Architecture and highlights of control system for GM/CA CAT macromolecular crystallography beamlines

S.Stepanov, O.Makarov, A.Urakhchin, U.Schwabe, C.Venkataraman, and R.Pugliese

The GM/CA Collaborative Access Team (CAT) at the Advanced Photon Source is established by the National Institutes of Health's National Institute of General Medical Sciences (GM) and National Cancer Institute (CA) to build and operate a national user facility for crystallographic structure determination of biological macromolecules. One bending magnet and two undulator beamlines at a canted undulator are being constructed. The beamline control systems will include automated beamline alignment and sample centering, interface to robotics sample changers, and ergonomic GUI for data acquisition with provisions for remote control. It has been decided that the control system will be based on EPICS with two groups of software on top of it. The first group will be software for beamline servicing. It will include automated beamline alignment, beam stability feedback loops, and beamline health monitoring. The second group will constitute software for data acquisition (beamline interface for users). It will deploy the BluIce GUI developed at the SSRL and recognized by user community for its convenience. An interface from BluIce to EPICS has been developed. To facilitate high throughput of the beamlines, fast on-the-fly scans will be widely used. For that purpose an EPICS support has been developed for the newest 32-axis turbo PMAC2 motion controller. Another highlight of the control system will be wide usage of non-VME EPICS servers available with new EPICS-3.14. Those servers have been installed to control focusing mirrors (bimorph mirrors power supplies), CCD detectors, and for BluIce integration into EPICS. Access Grid software developed at Argonne National Laboratory is considered for the remote access to beamline controls.

Abstract File: abstract00118.txt


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