01 RHIC polarization

The master DB web interface is:

http://www.phy.bnl.gov/cnipol/fills/

The CVS tables can be obtained by selecting “user (cvs)” format from the Table format or directly from
https://wiki.bnl.gov/rhicspin/Run_12_polarization
https://wiki.bnl.gov/rhicspin/Run_11_polarization
https://wiki.bnl.gov/rhicspin/Run_09_polarization

Summary of beam polarization for ppLong for last 3 years.

For W AL measurement the relative FOM= (P1+P2)^2*L are as follows

2012: FOM=92

2011: FOM=12

2009 : FOM=7

Fig 1.

Fig 2. yield of reco Ws (top) and diagram of polarization decay for both rings, vs. GMT time.

Several approximations were made while displaying offline RHIC pol values taken from the official web page, using: t0, avrP, P0, tau for each beam and each fill.

shown are only fills in which STAR Ws were found
each fill is set to last for 7 hours unless the next fill starts
black trapezoids use P0+Tau*(t-t0)
magenta lines show avrP
the red line fit is made to bins with trapezoid, so it is equivalent to NOT weighted average - I do it just for x-check.