A Four-Motor Insertion Device Control System at the Advanced Photon Source
- APS, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439 (United States)
The Advanced Photon Source (APS) is a third-generation synchrotron with major emphasis on insertion device (ID) sources. In the storage ring there are 35 straight sections, each about five meters in length, for possible insertion devices. Most of the insertion devices at the APS are 2.4 meters long. Currently there are 27 undulators installed in 25 straight sections. Twenty-two of the undulators are the original design fabricated by STI Optronics, which used two motors, one for each end of the device. A synchronizing mechanism between the upper and lower magnetic arrays was also used at each end. Recently, the APS has designed a new gap-separation mechanism for all new undulators. The new design is based on four independent motors, one driving each end of each magnetic array of the device. The control system of choice at the APS is EPICS. The control system is designed to be transparent to the user of the beamline who routinely operates the device. The differences between the two-motor and the four-motor versions of the ID control system are performed at low levels and are transparent. All devices have feedback and safeguard redundancy in the form of linear and rotary encoders and multiple-stage limit switches. This paper will discuss in detail the design philosophy and the implementation of the four-motor insertion device control system. This control system has been in operation for about three years.
- OSTI ID:
- 20652934
- Journal Information:
- AIP Conference Proceedings, Vol. 705, Issue 1; Conference: 8. international conference on synchrotron radiation instrumentation, San Francisco, CA (United States), 25-29 Aug 2003; Other Information: DOI: 10.1063/1.1757790; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Further measurements of bremsstrahlung from the insertion device beamlines of the Advanced Photon Source.
Advanced in undulator technology at STI Optronics