Ambient beam motion and its excitation by ghost lines in the Tevatron
V. Shiltsev (Fermilab)
TL;DR
This paper investigates the transverse betatron motion of the Tevatron proton beam, revealing that it is coherently excited by external sources and characterized by time-varying ghost lines in the spectrum.
Contribution
It provides the first detailed analysis of ghost lines and their impact on beam stability in the Tevatron.
Findings
Beam motion is coherent and externally excited.
Ghost lines in the spectrum are time-varying.
External sources of excitation are of unknown origin.
Abstract
Transverse betatron motion of the Tevatron proton beam is measured and analyzed. It is shown that the motion is coherent and excited by external sources of unknown origins. Observations of the time-varying "ghost lines" in the betatron spectrum are reported.
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Taxonomy
TopicsParticle Accelerators and Free-Electron Lasers · Particle accelerators and beam dynamics · Magnetic confinement fusion research