E.C. Aschenauer 2013/03/132 polarisation for Blue and Yellow t o -calibration underway minimal impact on polarization, makes A N more stable  should.

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Presentation transcript:

E.C. Aschenauer 2013/03/132

polarisation for Blue and Yellow t o -calibration underway minimal impact on polarization, makes A N more stable  should be done by tomorrow tomorrow  next step calibrate pC E.C. Aschenauer 2013/03/133

E.C. Aschenauer 2013/03/134 Caveat: not yet normalized to jet – simple reason need statistics Note: measured analyzing power for injection, 100GeV and 255 GeV in run 11/12 have not seen an energy dependence of pC/H-jet normalization  can use the same normalization factor for flat top and injection  so injection measurements will be pretty accurate  fills shown in all plots: 17085—17208 for B1 and Y1 Injection

E.C. Aschenauer 2013/03/135 at flat top

E.C. Aschenauer 2013/03/136 Account for beam polarization decay through fill  P(t)=P 0 exp(-t/  p ) growth of beam polarization profile R through fill pCarbonpolarimeter x=x0x=x0x=x0x=x0 ColliderExperiments correlation of dP/dt to dR/dt for all 2012 fills at 250 GeV Polarization lifetime has consequences for physics analysis  different physics triggers mix over fill  different  different

E.C. Aschenauer 2013/03/137 at injection 2012: / at flat top 2012: /-0.009

E.C. Aschenauer 2013/03/138 at injection 2012: / at flat top 2012: /-0.011

E.C. Aschenauer 2013/03/ : / : /-0.056

 Use factor 2 thicker targets compared to 2012  but still high death rate 10 Fill Date Time Energy B1 B2 Y1 Y2 Fill Date Time Energy B1 B2 Y1 Y /11 18:43 27 H /11 18:43 27 H /11 18:47 27 H /11 18:47 27 H /11 18:47 27 H /11 18:47 27 H /11 6: V /11 6: V /11 21: H1 H3 V /11 21: H1 H3 V /26 16:31 27 H /26 16:31 27 H /05 18: V /05 18: V /05 4: V3 H /05 4: V3 H /01 23: V /01 23: V /27 18:55 27 V /27 18:55 27 V /12 05: V /12 05: V4 Remaining Targets: Remaining Targets: ================== ================== B1: 0 horizontal and 6 vertical B1: 0 horizontal and 6 vertical B2: 6 horizontal and 0 vertical B2: 6 horizontal and 0 vertical Y1: 4 horizontal and 6 vertical Y1: 4 horizontal and 6 vertical Y2: 6 horizontal and 2 vertical Y2: 6 horizontal and 2 vertical Will have to replace targets at one of the next access