Horizontal tunes Horizontal tune increases with intensity during - PowerPoint PPT Presentation
Horizontal tunes Horizontal tune increases with intensity during impedance measurement, with 56 bunches Vertical tunes Vertical tune increases with intensity during impedance measurement, with 56 bunches Tunes during preliminary 6-bunch test
Horizontal tunes Horizontal tune increases with intensity during impedance measurement, with 56 bunches
Vertical tunes Vertical tune increases with intensity during impedance measurement, with 56 bunches
Tunes during preliminary 6-bunch test Both tunes decrease with intensity, as they should
Summary • Impedance measurement is still hampered by BBQ de- ficiencies (saturation?) • This also means that during feedback ramps, RHIC tunes are intensity dependent • The higher the intensity, the higher the measured tune • With feedback, the real tune gets lowered towards 2/3 with increasing intensity
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