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A summary on Polarisation in Run-12 for 255 geV

A summary on Polarisation in Run-12 for 255 geV. E.C. Aschenauer presenting the work done by Alan, anders , Bill and Dima. 255 GeV Results. Blue-1. polarisation at flat top Blue and Yel low. H-Jet. Yellow-1.  longitudinal. Normalization to H-Jet.

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A summary on Polarisation in Run-12 for 255 geV

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  1. A summary on Polarisation in Run-12for 255 geV E.C. Aschenauer presenting the work done by Alan, anders, Billand Dima

  2. 255 GeV Results Blue-1 polarisation at flat top Blue and Yellow H-Jet Yellow-1  longitudinal 2012/04/10

  3. Normalization to H-Jet Blue-1: in good agreement with jet without normalisation Yellow-1: normalized by 1.08 All measurements online and offline are normalized to jet now CDEV was reloaded with new offline numbers 2012/04/10

  4. 255 GeVResults Transverse Fills Polarisation lifetime in yellow very similar to longitudinal 255 GeV fills 0.10%±0.23/hour 1.4%±0.21/hour 2012/04/10

  5. 255 GeV Results 0.71%±0.28/hour 1.288%±0.18/hour H-Jet: Fills: 16586-16592 longitudinal 2012/04/10

  6. 255 GeV Results 0.62%±0.13/hour 0.9%±0.11/hour Polarisation lifetime very similar run-11 and run-12 so 255 GeV did not do the trick 2012/04/10

  7. 255 GeV Results 1.2%±0.16/hour 0.8%±0.096/hour Polarisation Lifetime for low Emittance fills 2012/04/10

  8. 255 GeV Results 0.75%±0.13/hour 0.39%±0.10/hour Jet same fill range 2012/04/10

  9. 255 GeV Results 0.8%±0.08/hour 1.24%±0.19/hour Polarisation Lifetimesince last week 2012/04/10

  10. Polarisation loss through rotator ramp Shown isthe ratio of the polarisationmeasurements before and after the rotator ramp at 255 GeV Blue Beam Yellow Beam 2012/04/10

  11. Big Problem • Reinstall new target in Blue and Yellow on Wednesday • Work on RHIC AGS injection measurement comparisons and loss on the ramp • After that should go back to normal measurement routine • measure at injection • before and after rotator ramp • in the middle of the fill  only this impacts PHENIX • at the end of the fill • Have a scheme how to provide to the experiments a polarisation, which allows to calculate for each trigger the correct luminosity weighted, polarisation profile corrected and to the jet normalized value • might apply it also 2011 data and • investigate it for 2009 100 GeV 2012/04/10

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