Calibration of the nonlinear ring model at the Diamond Light Source

Nonlinear beam dynamics plays a crucial role in defining the performance of a storage ring. The beam lifetime, the injection efficiency, and the dynamic and momentum apertures available to the beam are optimized during the design phase by a proper optimization of the linear lattice and of the distri...

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Bibliographic Details
Published in:Physical review special topics. PRST-AB. Accelerators and beams 2011-05, Vol.14 (5), p.054003, Article 054003
Main Authors: Bartolini, R., Martin, I. P. S., Rehm, G., Schmidt, F.
Format: Article
Language:English
Subjects:
Calibration
Design optimization
Diamonds
Frequency analysis
Light sources
Mathematical models
Momentum
Nonlinear dynamics
Parameters
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Summary:Nonlinear beam dynamics plays a crucial role in defining the performance of a storage ring. The beam lifetime, the injection efficiency, and the dynamic and momentum apertures available to the beam are optimized during the design phase by a proper optimization of the linear lattice and of the distribution of sextupole families. The correct implementation of the design model, especially the nonlinear part, is a nontrivial accelerator physics task. Several parameters of the nonlinear dynamics can be used to compare the real machine with the model and eventually to correct the accelerator. Most of these parameters are extracted from the analysis of turn-by-turn data after the excitation of betatron oscillations of the particles in the ring. We present the experimental results of the campaign of measurements carried out at the Diamond storage ring to characterize the nonlinear beam dynamics. A combination of frequency map analysis with the detuning with momentum measurements has allowed for a precise calibration of the nonlinear model that can accurately reproduce the nonlinear beam dynamics in Diamond.
ISSN:1098-4402
1098-4402
2469-9888
DOI:10.1103/PhysRevSTAB.14.054003