Current Situation and Plans

• The MCR schedule foresees stack and store. We are collecting quality data with the full detector in readout. Commissioning activities should occur between stores, unless approved by the run coordinator. Between stores, collect zero-bias data with as much of the detector as possible.
• Use the 50E30 prescale set for begin-of-run luminosities between 42E30 and 52.5E30.
  Presently we are experiencing severe DAQ instabilities (PDT readout crashes, muon L1 crate going out-of-sync) if the Level 2 accept rate exceeds approximately 850Hz. The 45E30 prescale set violates this limit. Therefore, until further notice, the above guideline is in effect.

• One special run request for tracker alignment is pending, but for the time being it should only be taken in the case of detector problems preventing quality data from being taken. See the special runs folder for the details.

• STT crates
  The STT is in the commissioning stage, and is not used for physics yet. From time to time these crates cause downtime for the experiment and our procedure is the following:
  • If there is no STT shifter: if SCL init does not fix STT crate end run immediately, remove ALL STT crates from the run, continue data taking. Addition of STT crates to data taking should only be done between stores.
  • If there is an STT shifter in the control room: provide 5-10 minutes for STT shifter to try to resolve problem with STT crate. If unsuccessful, end the run, remove affected STT crate, start another run. If you have to spend more than ~10-15 minutes per 8 hours shift resolving STT crates problems, remove ALL STT crates from data taking. As above, addition of STT crates to data taking should be done between stores only.
• The Vertex Examine phi distribution for L3 tracks is not flat. This is due to the examine still using "old" code and been affected by ~1.4% of non-working VLPC's. The Vertex Examine does not use L3 tracks, but calculates "L3 track parameters" by itself. The issue will be resolved as soon as Michiel Sanders is back in a few days.

• The Shift Captain should follow the MCR e-log and call MCR as needed to keep up with dynamic schedule of the Tevatron. MCR may give D0 quiet time or a Controlled Access. Page Dmitri Denisov for Controlled Access approval. See the whiteboard for Controlled Access requests.
• Please read the D0 Logbook before your shift in order to be better prepared.

Magnet Polarities

from Tuesday January 6, 8:00:

   Solenoid = Reverse
   Toroid   = Forward

from Tuesday January 13, 8:00:

   Solenoid = Reverse
   Toroid   = Reverse

from Tuesday January 20, 8:00:

   Solenoid = Reverse
   Toroid   = Forward

See also Magnet Operations

Trigger Configuration

Rules for Changing Prescales: choose the prescale set which has a name closest to the luminosity at the start of the run.

Available prescale sets for the above trigger are:

   02E30, 05E30, 08E30, 10E30, 13E30, 17E30, 20E30, 25E30,
   30E30, 35E30, 40E30, 45E30, 50E30, 60E30, 70E30, 80E30, and scraping.

In this configuration, we see typical L1/L2/L3 accept rates of 600-1400/300-800/30-60 Hz, depending on the instantaneous luminosity and prescale set. If the rates are too high - L1>1500 or L2>850 or L3>65 Hz - or the global FEB exceeds 10%: contact the Triggermeister. A good effort should be made to keep the average global FEB rate below 6%.

Recorded Physics Run Limit:    4 hours     or    instantaneous rate in Taker < 25 Hz

The DØ Shift Schedule (D0 Shift Calendar)

Other shifters can be on-call:

1. if there is no Store,
2. if MCR states there is no shot setup expected for 4 or more hours,
3. if the situation with the sub-detector is stable,
4. if there are no sub-detector tasks to perform (checklist, calibration, special runs, monitoring), and
5. if the Shift Captain is in agreement

Calorimeter, Muon and CFT Shifters do not need confirmation from their sub-detector coordinators. However, there are Special Instructions for Muon Shifters and Special Instructions for CFT/CPS/FPS Shifters which must be followed before leaving.

Shifters must report in with the Shift Captain to give a contact number before leaving.

Global Monitoring: Trigger & Physics Examines

The name of an institution will be listed next to the GM shifter when the Global Monitoring shift is being run remotely. There is a GM Web Communicator GUI to be used by the Shift Captain, remote GM Shifter, and other shifters as needed. The interface is very simple; shifters communicate via typed text. The gui should be open by default on the Captain console. If not, the gui can be launched with the following command sequence: setup d0online; start_daq gmwebcom.

The Shift Captain is running the vertex examine (currently on d0ol27). Michiel Sanders has documented the Vertex Examine Instructions (pdf and html). For reference, look at the VE plots entered in the logbook during previous shifts.

Periods Without a Shot Setup or Colliding Beams

By default, 'Recording' should be ON as we would like to monitor the full data path from the detectors to tape at the Feynman Computing Center.

There are three trigger bits with prescales which have been tuned both to exercise the L1, L2 and L3 rates and to send an average of 1 Hz to tape, and a low rate L3 mark and pass trigger that writes to the monitor stream. The prescales should only be changed by or with approval of the triggermeisters.

If there is a request for cosmic ray data: the default cosmics trigger list is official/special/cosmics-3.00.xml. If the CTT is available, official/special/cosmics_trk-1.00.xml can also be used.