ESS Docs Document 174-v1

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Some Considerations on Predetuning for Superconducting Cavity

Document #:
ESS-doc-174-v1
Document type:
Tech Note
Submitted by:
Rihua Zeng
Updated by:
Rihua Zeng
Document Created:
23 Feb 2012, 09:25
Contents Revised:
23 Feb 2012, 09:25
DB Info Revised:
23 Feb 2012, 09:25
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  • Public document
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Abstract:
Some analysis of pre-detuning for different cases for superconducting cavity are done in this note. Only feedforward is applied in simulation to try to find appropriate beam injection time and required steady state generator current. For synchronous phase effect and QL spread, an optimized pre-detuning is helpful to minimize the generator power. It is also examined that resonance tracking at filling stage is an effective way to achieve required steady state while not consuming extra generator power or increasing filling time. For Lorentz force detuning, choosing an appropriate pre-detuning is essential, by which extra power could be reduced by almost a factor of 4.
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