Scatter Plot from Scientific Research

Tune diagram showing the measured average beam tunes along the interval of 3,000 turns. From the total of about 400 shots measured, around 150 shots are on the resonance. The solid line Q x + 2 Q y = 79 is the resonance excited by our sextupole settings. Q x and Q y are the betatron tunes, and 79 is the harmonic number of the resonance. The statistical error of tune evaluation is within the marker size.

DOI