From: Flemming Videbaek (videbaek@rcf.rhic.bnl.gov)
Date: Thu Mar 27 2003 - 20:05:11 EST
Dear Collaborator, As you should know we are now in the setup phase of the pp run. The machine people will have the priority for the machine in the next 2 weeks, and a agressive program for bringing up luminosity an beam quality in the subsequent 3 weeks up to around April 26. The experiments is expected to have access to beams overnight starting a few weeks from now. A shift schedule is under preparations for the the physics part of the run (4/26 - 5/16) , as well as manning some of the night shifts from about 4/15 or so depening on machine progress. Both at the Beam Use Presentations proposal RHIC meetings we have presented the summary goals for the pp. Enclosed is the plan as seen at this point in time. The actual order of execution will depend on machine status. Brahms pp goals 1.Reference data for HI collisions · Completion of the low-pt survey · Estimated to take ~1 week with 50% uptime an 2-3* minimum luminosity 2.Reference data for dA and gluon saturation description for high pt (.5-4 GeV/c) at large rapidities (3-3.5). 3.Transverse spin asymmetry at moderately high Xf f(<0.4) for charged pion. The high rapidity (3&4deg) are settings where data will be useful for both the spin program and the high pt spectra The dA run resulted in a good overall data taking albeit we did not get as much statistics for high pt running as one could have hoped for. The summary run information will be put at the operator page. Statistics at 40 deg inicates we have measured pion spectra to about 6 GeV/c (using C4), while at y~3 and 2 spectra can be obtained up to 2.5-3 GeV/c. Much analysis will have to be done before we obtain physics results, in particular because the methods to be used for calibrations, normalisations and centrality determination are (will have to be) different from the Au-AU run last year. regards Flemming -- Flemming Videbaek Brookhaven National Laboratory Physics Department tlf 631-344-4106 fax 631-344-1334 e-mail: videbaek@bnl.gov
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