From: Flemming Videbaek (videbaek@rcf.rhic.bnl.gov)
Date: Sat Mar 01 2003 - 14:43:24 EST
Dear Collaborator I hope you are following the run-progress via the shift reports and the e-logs. Let me summarize briefly where we are in the program. Most of soft physics program has been completed. The exception is mostly that we decided due to the problems with a missing TD1 slat in the FFS trigger to repeat the 8 deg runs. These are currently underway, and with the present most improved stores (ZDC~9K initial and reasonable backgrounds) these run can be expected to be completed in a few (2-3) good stores. Then the higher pt program can start i.e. the 4 and 3 degree higher field (1/4) 1/2 and either 2/3 or 1/1 settings depending on the actual rates observed can is up. The 12 deg higher field setting will be done subsequently; if both polarities can be done depends on RHIC progress and on possible decisions to extend the dA run. Rate estimates indicates that about a week is needed to do one pol at 12 deg. For the mid-rapidity region we have alreay a quite good sample ~3M triggers (~.8M tracks) at y~0. With the C4 Cherenkov detector physical installed on the platform (with 1/2 the PMTs so far) we can hope to have it operational sometime this week and can pursue measurements of high pt pions using both C4 and the tof extension also in place. We continue to have experimental problems of various kinds that have impacted the amount of data we have taken. Lots of this has been in regard to HV problems with DCs and TPCs both related to detector, HV supplies and to misc. DAQ hickups. To improve the experiment uptime I urge the shifters to continue to -- beware of present detector status and problems by reading e-logs and discuss at start of shift in detail with previous shift status of experiment an experimental program. Please do also carefull monitor the progress checking the monitor plots and printouts, as well as pying carefull attention to beam quality (backgrounds) and -- In case of problems make sure to consult the 'shift guide' and various notes poste in the CH. The shift guide 'problem section' has been updated today and includes description of problems and solutions to misc. problems that we have had recently. 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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