Current Situation and Plans

• Run Plan - Take the data with the v15 global trigger with all crates in readout during store. During the period between stores, run the zero bias trigger. Detector examines should be run at all times.

• We are currently pausing the run during shot setup (ramp and squeeze) to allow power cycling of some PDT power supplies.

• Between stores, calorimeter pedestal calibrations should always be attempted, even if it appears there will not be sufficient time. It is almost always the case that the pedestals will be completed in time, and even if beam is injected the CALMUO shifters and experts can choose not to use those pedestals. The MCR should NOT be contacted to request quiet time for this procedure.

• Tel 2 studies - We will keep running during Tel 2 studies, however, the captain should watch losses.

• Logbook - Keep a good logbook. Include an explanation of any downtimes greater than 5 minutes.

• Halo - After the shutdown the beam pipe vacuum is not as good which leads to higher halo rates. Prior to declaring a store the proton halo rates should be less than 13 kHz. Once a store is declared, the halo rates will go up as the luminosity high voltage is increased. If the final rates are greater than 20 kHz after the store has begun, contact MCR to see if the Halo rates can be reduced. If the rate becomes more than 45 kHz, contact the run coordinator.

• Quiet time - Watch for possible quiet time. Page the Cal expert so that they can take their NLC runs. Page the SMT expert in case they would like to take scans. L1 Cal might also want to do calibrations. If there is remaining time, Cosmic runs should be taken. Quiet time should not be specifically requested without run coordinator approval.

• Alarms - make sure shifters understand alarms for their detector.

• All warning messages transmitted over the Fermilab emergency system are to be repeated by the captain over the D0 pager (x4674). This includes any weather warnings or watches.

• Any configuration change of a system needs to be approved by the Run Coordinator.

• Test Runs: All test runs that are taken during physics should be approved by the run coordinator. All starts and stops of test runs should be kept to a minimum. The DAQ shifter and captain should be informed before any start of a test run. Any test runs that interfere with data taking should be stopped.

• The Shift Captain should follow the AD Run Coordinator and MCR e-logs and call MCR as needed to keep up with the schedule of the AD. MCR may give D0 quiet time or a Controlled Access. Get approval from the run coordinator before requesting a Controlled Access or quiet time. See the white board for Controlled Access requests (ask the Run Coordinator about approved work).
• Please read the D0 Logbook before your shift in order to be better prepared.

Magnet Polarities

The Detector is open. Do not power magnets.

since Sunday August 5, 2007:

   Solenoid = Off
   Toroid   = Off

The magnets will remain powered down until the first store. When we come up, the polarity set will be:

   Solenoid = Forward
   Toroid   = Reverse

See also Magnet Operations

Trigger Configuration

For prescales, choose the prescale for the appropriate luminosity range.

In this configuration, we should see typical L1/L2/L3 accept rates of 300-1600/200-850/25-100 Hz, depending on the instantaneous luminosity and prescale set. If the rates are too high - L1>1800 or L2>1000 or L3>120 Hz -; the global FEB exceeds 10%; or the L3 rate drops below 20 Hz: page the Triggermeister. A good effort should be made to keep the global FEB rate below 7%.

Anytime the L3 disables are above 15%, change to the next higher prescale set.

Recorded Physics Run Limits:

• Runs should be changed at the prescale set boundry, except:
  • the minimum length is 2 hours,
  • the maximum length is 4 hours.
• Current prescale sets are found here

• The prescale sets above 230E30 have draconian measures to reduce the trigger rates. Thus at the beginnig of high luminosity stores, one hour run may be taken to avoid running with such prescales.

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

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. Calorimeter and SMT sub-detector coordinators would need to be contacted before their shifter goes on call.

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

Global Monitoring: Trigger & Physics Examines

The vertex examine runs automatically (currently on d0ol77) and the Shift Captain looks at the plots. Michiel Sanders has documented the Vertex Examine. 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 OFF.

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_run2b_MTM-1.10.xml.