Tune Determination of Strongly Coupled Betatron Oscillations in a Fast-Ramping Synchrotron

Conference · Tue May 01 04:00:00 EDT 2012 · Conf.Proc.C1205201:3770-3772,2012

OSTI ID:1049390

Alexahin, Y; Gianfelice-Wendt, E; Marsh, W; Triplett, K

Tune identification -- i.e. attribution of the spectral peak to a particular normal de of oscillations -- can present a significant difficulty in the presence of strong transverse coupling when the normal mode with a lower damping rate dominates spectra of Turn-by-Turn oscillations in both planes. The introduced earlier phased sum algorithm helped to recover the weaker normal mode signal from the noise, but by itself proved to be insufficient for automatic peak identification in the case of close phase advance distribution in both planes. To resolve this difficulty we modified the algorithm by taking and analyzing Turn-by-Turn data for two different ramps with the beam oscillation excited in each plane in turn. Comparison of relative amplitudes of Fourier components allows for correct automatic tune identification. The proposed algorithm was implemented in the Fermilab Booster B38 console application and successfully used for tune, coupling and chromaticity measurements.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL
• Sponsoring Organization: DOE Office of Science
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1049390
• Report Number(s): FERMILAB-CONF-12-150-APC-AD
• Conference Information: Journal Name: Conf.Proc.C1205201:3770-3772,2012
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
ALGORITHMS
AMPLITUDES
Accelerators
BEAMS
BETATRON OSCILLATIONS
CONSOLES
COUPLING
DAMPING
DATA
DISTRIBUTION
FERMILAB
MEETINGS
NOISE
OSCILLATIONS
PARTICLES
PEAKS
SIGNALS
SPECTRA
SYNCHROTRONS
TUNING