Preliminary Studies Of A Phase Modulation Technique For Measuring Chromaticity

Journal Article · Mon Nov 20 04:00:00 EST 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2401441· OSTI ID:20894953

Tan, C -Y ^[1]

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1. Fermi National Accelerator Laboratory, Accelerator Division/Tevatron, MS341, P.O. Box 500, Batavia, IL 60510-0500 (United States)

The classical method for measuring chromaticity is to slowly modulate the RF frequency and then measure the betatron tune excursion. The technique that is discussed in this paper instead modulates the phase of the RF and then the chromaticity is obtained by phase demodulating the betatron tune. This technique requires knowledge of the betatron frequency in real time in order for the phase to be demodulated. Fortunately, the Tevatron has a tune tracker based on the phase locked loop principle which fits this requirement. A preliminary study with this technique has showed that it is a promising method for doing continuous chromaticity measurement and raises the possibility of doing successful chromaticity feedback with it.

• OSTI ID: 20894953
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 868; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BETATRONS
FEEDBACK
FERMILAB TEVATRON
MEASURING METHODS
MODULATION
PARTICLE BEAMS