A state variable approach to the BESSY II local beam-position-feedback system
- BESSY II, Berlin (Germany)
At the BESSY II facility, stability of the electron beam position and angle near insertion devices (IDs) is of utmost importance. Disturbances due to ground motion could result in unwanted broad-bandwidth beam-jitter which decreases the electron (and resultant photon) beam`s effective brightness. Therefore, feedback techniques must be used. Operating over a frequency range of < 1- to > 100-Hz, a local feedback system will correct these beam-trajectory errors using the four bumps around IDs. This paper reviews how the state-variable feedback approach can be applied to real-time correction of these beam position and angle errors. A frequency-domain solution showing beam jitter reduction is presented. Finally, this paper reports results of a beam-feedback test at BESSY I.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 392829
- Report Number(s):
- LA-UR-96-3419; CONF-960621-34; ON: DE97000376; TRN: 97:000084
- Resource Relation:
- Conference: EPAC `96: 5. European particle accelerator conference, Barcelona (Spain), 10-14 Jun 1996; Other Information: PBD: [1996]
- Country of Publication:
- United States
- Language:
- English
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