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CERN PS Booster MDs space charge and resonances PTC-ORBIT benchmarking Participants: E.Benedetto, M.Martini, A.Molodozhentsev, N.Monet, V.Forte, F.Schmidt, G.Rumolo, operators … with help from S.Hancock
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PSB: MDs … data for the benchmarking MD#1: May 22-23, 2012 ‘CNGS’ (Bf=0.47) beam … tune scan MD#2: June 4, 6-7 ‘LHC25’ (Bf=0.24, Bf=0.40) beam … tune scan MD#3: June 22 Space Charge effects in the longitudinal plane ‘LHC25’ beam (Bf=0.4) … Montague resonance study MD#4: June 28 ‘CNGS’ beam (Bf=047) … Montague resonance study (checking MD#1)
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PSB: tune scan for different types of beam QxQx QyQy Estimated incoherent space charge detunning * : ‘CNGS’ type beam ~900e10 ppb, 15/7.5m ~ 1eV.sec Bf=0.47 Q INC ~ -0.25 ‘LHC’ type beam ~170e10 ppb, 3.4/1.8 m ~ 0.6eV.sec Bf=0.24 Q INC ~ -0.45 Bf=0.40 Q INC ~ -0.25 * vertical detuning
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‘CNGS’ type beam … for the code benchmarking Effect of the INTEGER resonance Q x =4 (systematic) B f ~ 0.47, N b ~ 900 10 10 N inj = 14 H (norm) ~ 15 mm.mrad V (norm) ~ 7.5 mm.mrad MD#1
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‘LHC25’ type beam … for the code benchmarking Effect of the INTEGER resonance Q x =4 (systematic) Q x =4.10, Q y =4.21 B f ~ 0.40, N b ~ 170 10 10 N inj = 2.8 H (norm) ~ 3.4 mm.mrad V (norm) ~ 1.8 mm.mrad MD#2
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‘LHC25’ type beam Effect of the INTEGER resonance Q x =4 Qx=4.10 Qx=4.065 Qx=4.044 B f ~ 0.40, N b ~ 170 10 10 N inj = 2.8 H (norm) ~ 3.4 mm.mrad V (norm) ~ 1.8 mm.mrad MD#2
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MD#3 ‘LHC25’ type beam B f ~ 0.40, N b ~ 170 10 10 N inj = 2.8 H (norm) ~ 3.4 mm.mrad V (norm) ~ 1.8 mm.mrad Effect of the Montague resonance 2Q x -2Q y =0 FIRST trial … for the code benchmarking
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MD#3 ‘LHC25’ type beam B f ~ 0.40, N b ~ 170 10 10 N inj = 2.8 H (norm) ~ 3.4 mm.mrad V (norm) ~ 1.8 mm.mrad
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‘CNGS’ type beam B f ~ 0.47, N b ~ 900 10 10 N inj = 14 H (norm) ~ 15 mm.mrad V (norm) ~ 7.5 mm.mrad Effect of the Montague resonance 2Q x -2Q y =0 FIRST trial MD#4 Qx=4.22, Qy=4.27 … for the code benchmarking Vertical aperture limitation
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