Hello All, After many "working on injection" days, RHIC stored and cogged the beam at gamma=70 for an hour this evening. Two good news from the data (run# 2050)! The "vertex" distributions from Beam-Beam and ZDC seem to be back to normal: time(left-right) ~ 0! After all, the shifts in time differences we've been seeing lately must be from actual changes of RHIC beam tunes, not from some extra delay cables or some software offsets. (Please see http://pii3.brahms.bnl.gov/~operator/pictures/new_timing.ps) The completely installed Si detector seems to be working well. Very nice correlations are seen between Tile and Si (ADC Sum). (please see http://pii3.brahms.gov/~operator/pictures/si_vs_tile.ps). More good stable beam is expected for the weekend with hopefully more good news. Cheers, JH
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