Author: Allison, S.
Paper Title Page
S12FC02 Generalized Fast Feedback System in the SLC 414
 
  • L. Hendrickson, S. Allison, T. Gromme, T.M. Himel, K.E. Krauter, R.C. Sass, H. Shoaee
    SLAC, Menlo Park, California, USA
  • F. Rouse
    UCD, Davis, California, USA
 
  Funding: Work supported by Department of Energy contract DE-AC03-76SF00515.
A generalized fast feedback system has been developed to stabilize beams at various locations in the SLC. The system is designed to perform measurements and change actuator settings to control beam states such as position, angle and energy on a pulse to pulse basis. The software design is based on the state space formalism of digital control theory. The system is database-driven, facilitating the addition of new loops without requiring additional software. A communications system, KISNet, provides fast communications links between microprocessors for feedback loops which involve multiple micros. Feedback loops have been installed in seventeen locations throughout the SLC and have proven to be invaluable in stabilizing the machine.
 
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S12FC02  
About • Received ※ 10 October 1991 — Accepted ※ 02 January 1992 — Issued ※ 04 December 1992  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
S12FC03 Smart Machine Protection System 420
 
  • S. Clark, S. Allison, A.A. Grillo, T. Gromme, D.A.W. Hutchinson, H. Kang, D. Millsom, D. Nelson, J.D. Olsen, N.C. Spencer, K.K. Underwood, G.R. White, S. Zelazny
    SLAC, Menlo Park, California, USA
 
  Funding: Work supported by Department of Energy contract DE-AC03-76SF00515.
A Machine Protection System implemented on the SLC automatically controls the beam repetition rates in the accelerator so that radiation or temperature faults slow the repetition rate to bring the fault within tolerance without shutting down the machine. This process allows the accelerator to aid in the fault diagnostic process, and the protection system automatically restores the beams back to normal rates when the fault is diagnosed and corrected. The user interface includes facilities to monitor the performance of the system, and track rate limits, faults, and recoveries. There is an edit facility to define the devices to be included in the protection system, along with their set points, limits, and trip points. This set point and limit data is downloaded into the CAMAC modules, and the configuration data is compiled into a logical decision tree for the 68030 processor.
 
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S12FC03  
About • Received ※ 02 December 1991 — Accepted ※ 02 January 1992 — Issued ※ 04 December 1992  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)