# Presentation: 113026

## D0 Status: May 13-20

- Week integrated luminosity
- 2.3pb-1 delivered
- 1.4pb-1  utilized (60%)
- Data collection
- global data collections during stores
- full detector in readout: 3.1mln events collected
- physics trigger menu: v7.2
- rejecting backgrounds using L2 muon filter
- updates in QCD and other jet triggers
- major sources of downtime last week
- Front-end busy: 15%
- DAQ system problems: 10%
- L2 related problems: 10%
- loss of L2 inputs
- actively working on improving monitoring
- Others: 5%
- special runs collected
- calorimeter, muon
- Accesses last week
- CFT, muon, calorimeter - Thursday
- Muon crate - Friday morning
- CFT and SMT firmware upgrades - Friday afternoon

- Dmitri Denisov

## Separator Spark on May 16

- Around 8:08am on May 16th Tevatron beam was aborted due to unusually high losses
- Tevatron separator spark
- D0 quads quenched, triggering the abort
- D0 SMT protection pooled the beam abort as well
- Peak rate seen by the D0 silicon protection BLMs was 90rads/sec , total integrated dose was 110rads
- highest dose rate obtained by D0 in single event in Run II
- silicon and most other D0 detectors HV tripped
- total integrated dose was within D0 silicon detector tolerances
- No known damage to the silicon or other D0 detectors been done
- We should work on preventing such events in the future
- separators conditioning
- abort on separator trip?
- D0 proton and p-bar halos last week were within acceptable limits
- 2-3kHz for pbars and 30-50kHz for protons

- Dmitri Denisov

## Store Abort on May 18

- At 13:26 on Saturday, May 18
- D0 FPD shifter was removing pots in preparation for store termination
- shifter made a series of mistakes commanding pots to move closer to the beam instead of sending pots to “home” positions
- beam was aborted due to high losses
- no known damage to the D0 and CDF detectors
- Actions taken
- procedure for removal of pots is streamlined
- “hardwired” limits preventing operator from moving pots too close to the beam are established and person updating these numbers been identified
- we postponed pots operations for 2 days
- all FPD shifters been briefed about the accident and re-trained
- This was the first and we plan last store abort due to the D0 pots operations

- Dmitri Denisov

## D0 Detector Status

- Luminosity detector
- stable operation
- Silicon detector
- silicon detector is running well (1 out of 8 LVPS is OFF)
- studies of “grassy” noise are progressing
- Fiber tracker
- fully instrumented with electronics and in global readout
- working on CFT and CPS/FPS commissioning
- populating forward preshower detector with AFE boards
- Calorimeter
- stable operation
- Muon system
- stable operation
- installation of modified MFC cards is progressing well
- all muon tracking crates have new cards
- loss of beam time due to muon readout errors is reduced from ~10% to ~3% as of today
- Trigger
- L1 trigger is running stable
- L2 trigger is running well
- optimization of monitoring tools
- training of shifters
- L3 trigger
- calorimeter algorithms are running well
- muon code is running on-line, in mark-and -pass mode for now

- Dmitri Denisov

## This Week D0 Run Plan

- Global data collection today and tomorrow
- During accelerator studies
- calibrations for different sub-systems
- finish installation of muon MFC cards
- multi-buffer firmware  download into tracking and trigger framework crates (major reason for current front-end busy fraction)
- Level 2 system software upgrade
- installation of final Run II calorimeter Level 1 trigger electronics
- first +-0.8 in eta
- Continue physics data taking with full detector in readout starting Thursday
- global trigger list v7.X
- readout rate ~100Hz (or more if multi-buffer fully implemented)
- rate to tape ~30Hz
- Plan to finish “Summer Conferences” data sample collection by June 3rd
- No access requests as of now
- Schedule for June shutdown
- ready to start access on June 3rd
- planning to accomplish critical jobs within 12 days

- Dmitri Denisov