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Feedback control of coupled-bunch instabilities

Conference ·
OSTI ID:10187995
; ; ; ; ;  [1];  [2]
  1. Stanford Linear Accelerator Center, Menlo Park, CA (United States)
  2. Istituto Nazionale di Fisica Nucleare, Frascati (Italy). Lab. Nazionale di Frascati
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The next generation of synchrotron light sources and particle accelerators will require active feedback systems to control multi-bunch instabilities. Stabilizing hundreds or thousands of potentially unstable modes in these accelerator designs presents many technical challenges. Feedback systems to stabilize coupled-bunch instabilities may be understood in the frequency domain (mode-based feedback) or in the time domain (bunch-by-bunch feedback). In both approaches an external amplifier system is used to create damping fields that prevent coupled-bunch oscillations from growing without bound. The system requirements for transverse (betatron) and longitudinal (synchrotron) feedback are presented, and possible implementation options developed. Feedback system designs based on digital signal-processing techniques are described. Experimental results are shown from a synchrotron oscillation damper in the SSRL/SLAC storage ring SPEAR that uses digital signal-processing techniques.
Research Organization:
Stanford Linear Accelerator Center, Menlo Park, CA (United States)
Sponsoring Organization:
USDOE, Washington, DC (United States)
DOE Contract Number:
AC03-76SF00515
OSTI ID:
10187995
Report Number(s):
SLAC-PUB--6180; CONF-930511--474; ON: DE93041072
Country of Publication:
United States
Language:
English

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Related Subjects

43 PARTICLE ACCELERATORS
430303
BEAM BUNCHING
COMPUTERIZED CONTROL SYSTEMS
EXPERIMENTAL FACILITIES AND EQUIPMENT
FEEDBACK
FREQUENCY DEPENDENCE
INSTABILITY
SIGNAL CONDITIONING
SYNCHROTRON RADIATION SOURCES