Current Situation and Plans

• (7-12-04) We have had some problems ramping up the toroid magnet. The basic rule: "Do not ramp (down or up) the toroid without the approval of the Run Coordinator" (unless in emergency). If a problem with the toroid occures, the Ops shifter should *not* try to recover. Consult with the Run Coordinator to call in experts. The Run Coordinator will decide about polarity changes case-by-case.

• (7-1-04) V13 is online. Please pay particular attention to anything which does not behave as usual. Please do not hesitate to page the System Experts, Run Coordinator and/or Trigger Meisters. In case of L3 disables page the Trigger Meister.

• (7-1-04) V13 and prescale
  
  • The prescale files for V13 have names with luminosity ranges. Choose the prescale file with the range covering the instantaneous luminosity at the beginning of the run. The luminosity may fall below the lower bound during the run.
  • See below for the recorded run limits which have been optimized for the for the instantaneous luminosity profile in a store.
  • See below for the list of available prescale sets.

• Procedure in the case of rescraping and beam loss tuning by MCR: HERE

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

Magnet Polarities

Toroid ramps must be approved by the Run Coordinator.

from Tuesday July 6, 8:00:

   Solenoid = Forward
   Toroid   = Forward

from Tuesday July 13, 8:00:

   Solenoid = Forward
   Toroid   = Reverse

from Tuesday July 20, 8:00:

   Solenoid = Reverse
   Toroid   = Reverse

See also Magnet Operations

Trigger Configuration

Rules for Changing Prescales: The prescale files for V13 have names with luminosity ranges. Choose the prescale file for which the luminosity at the beginning of the run is within that range. The luminosity may fall below the lower bound during the run. Unless instructed otherwise by the trigger meisters, do not start a run with an initial luminosity not inside the correct prescale set. Also please do not start a new run to change prescales unless the time limits are reached or the run needs to be stopped for some other reason.

Available prescale sets for the above trigger are:

     00-10E30, 10-15E30, 15-20E30, 20-25E30, 25-30E, 30-35E30, 35-40E30,
     40-45E30, 45-50E30, 50-55E30, 55-60E30, 60-70E30, 70-80E30, 80-100E30 and scraping 

   

In this configuration, we should see typical L1/L2/L3 accept rates of 300-1600/200-750/30-60 Hz, depending on the instantaneous luminosity and prescale set. If the rates are too high - L1>1700 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 7%.

Recorded Physics Run Limit:

• default 4 hours
• or 2 hours with prescale 80-100E30, 70-80E30, 60-70E30, 55-60E30 and 50-55E30
• or change presale if the instantaneous rate in the Taker is < 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.