M. Weber, AEM 4/5/041 Weekly report 3/29-4/4 Delivered:7.7pb -1 Recorded:6.3pb -1 (82%) 12.6M events

M. Weber, AEM 4/5/042 Issues Downtime due to unstable silicon readout channels and a Muon readout crate. Air flow trip of the Central Track Trigger rack in the Collision Hall No CTT during a significant part of store Access on 4/1: CTT Muon alignment Survey on 3/26 showed a shift of 4mm in the central East Muon chambers. Confirmed by a survey on 4/1. Adapting the offline reconstruction. Blown fuse in a Forward Proton Detector power supply Repaired during a TeV access on 4/1

M. Weber, AEM 4/5/043 Luminosity We think the D0 Luminosity measurement is fine: Jet and Muon trigger cross-sections are constant within 1% hardware problem ?

M. Weber, AEM 4/5/044 Losses during the quench on Fri 140 Rad/sec Inst. dose rate was a factor of 3-4 higher than ever seen before Integrated dose was ~200Rad (not too bad) Lots of channels tripped in the Silicon, Lumi and Muon HV

M. Weber, AEM 4/5/045 Summary Offline reconstruction data quality plots look similar to ones from good runs taken before the mini-shutdown Access on Thursday 4/1/04 (CTT, Survey, FPD). Hit hard (dose rate) by the quench on Friday Change in the Luminosity ratio CDF/D0 is not due to a problem in the D0 measurement