Linearizing Intra-Train Beam-Beam Deflection Feedback
Beam-beam deflection feedback acting within the crossing time of a single bunch train may be needed to keep linear collider beams colliding at high luminosity. In a short-pulse machine such as the Next Linear Collider (NLC) this feedback must converge quickly to be useful. The non-linear nature of beam-beam deflection vs. beam-beam offset in these machines precludes obtaining both rapid convergence and a stable steady-state lock to beam offsets with a linear feedback algorithm. We show that a simply realizable programmable non-linear amplifier in the feedback loop can linearize the feedback loop, approximately compensating the beam-beam deflection non-linearity. Performance of a prototype non-linear amplifier is shown. Improvement of convergence and stability of the beam-beam feedback loop is simulated.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 876605
- Report Number(s):
- SLAC-PUB-11709; TRN: US0601258
- Resource Relation:
- Conference: Contributed to26th Advanced ICFA Beam Dynamics Workshop on Nanometer Size Colliding Beams (Nanobeam 2002), Lausanne, Switzerland, 9/2/2002-9/6/2002
- Country of Publication:
- United States
- Language:
- English
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