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Ring tuning spread 2 MW beam at 1 GeV – Space charge tune spread about 0.2 (green) – Chromatic tune spread must be controlled by sextupoles (red: beam.

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Presentation on theme: "Ring tuning spread 2 MW beam at 1 GeV – Space charge tune spread about 0.2 (green) – Chromatic tune spread must be controlled by sextupoles (red: beam."— Presentation transcript:

1 Ring tuning spread 2 MW beam at 1 GeV – Space charge tune spread about 0.2 (green) – Chromatic tune spread must be controlled by sextupoles (red: beam core Dp/p=+/-0.6%; pink: partial halo Dp/p=+/- 1.0%) Imperfection non-structure resonances are shown in black

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6 Two regions of working points Imperfection resonances up to 3 rd orderImperfection resonances up to 4 th order

7 w.p.(6.4,6.3) Tune spread for 2MW beam with dp/p=0.6 %

8 Phase Advance A4 A6 B4 B6 C4 C6 D4 D6 A4-C4=19*2*  /2=18*  =  =B4-D4=A6-C6=B6-D6 A4-B6 =19*2*  /4 +3*  /2=10*  +  =B4-C6=C4-D6

9 Skew & Normal Sextupole A4-C4C6-A6B4-D4B6-D6 (A4-C4)-(B6- D6) (C6-A6)-(B4- D4) = (-2.45) = = = –(-6.96) = = = (-2.54) = = = = (-6.97) = = (-.24) = = = (-5.84) = (-2.54) = (-2.87) = (13.97) = = (-.90) = = (- 1.06)= = (-.69) = (-.81) = (-1.35) = = (-1.06) = (-.9) = = (-.69) = (-.92) = (-.9) = = = (-.2) = (-.86) = (-.64) = (-2.19) = % 1.1% 6%


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