Talks, verbal reports

• Test runs for L3Muon online: Martijn Mulders.
  Aproximately 100K central muon and 100K forward muon triggers were collected with L3 muon filters running with 100% mark and pass fraction. See Martijn's note for details. The raw data are available on clued0. Online the loose muon efficiency was measured as a function of pt and this agreed perfectly with the results of the simulator run offline. Tight and A-stub efficiencies without pt cut were measured too.
  Apparent problems for the L3 nodes in running L3Muon:
  • Time consumption was excessive. About 50 timeouts from events that took >30 seconds. Being investigated offline. Are events that have such crashes kept online?
  • Memory consumption went up to around 100 MBytes, whereas with calorimeter only tools running it was 20 MBytes. Not known if this was due to a memory leak or just the size of the program.
  • Additional information on test runs from Gustaaf Brooijmans.
  Shadow nodes would be oh so useful!
• Status report on hot calorimeter cell killing (NADA) for L3 and other calorimeter unpacking issues: Marumi Kado.
  • Implementation of L3 NADA underway. The idea is to have pretty much a straight copy of the offline implementation. More next week.
  • Non-linearity package is implemented. The question of whether or not this should be common with offline was not resolved. Marumi will talk to Andre Turcot.
  • At some point the geometry file for calorimeter will most likely change when the origin of D0 coordinate system is redefined (to be at the centre of the tracker).

There will be a trigger workshop on 22nd-23rd April (the first two days of the collaboration week. We (L3 algorithms) should do some preparation for this. Terry will send round an email in advance of next week's L3 meeting.

Scribe: Terry Wyatt.