Search/Navigation:
Related:
SLAC/EPP/HPS Public
Jefferson Lab/Hall B/HPS Run Wiki
S30XL-LESA/LDMX
Key discussions during the meeting:
The new survey results seem to indicate that the ECAL is shifted by only 1mm, not the 3 mm that we had for the Pass1 processing. This number still needs to be finalized. There was some discussion whether this should delay starting pass 2. The consensus we came to was that it would be worth having the survey results included, if it does not delay the start of pass 2 by too much. It is already clear that there will be a pass 3 processing of the unblinded data anyway in the not too distant future, and if not ready by Wednesday morning, we can start pass 2 and save the ECAL survey shift for pass 3.
Omar noted that if we move the ECAL then we will need to adjust the cluster matching cuts, otherwise we risk having too few matches. This may be needed anyway because the fringe field in the new field map shows the field is not perfectly in the y direction but has x and z components, which would steer the beam in the y direction.
We will run a new pass 2 test very soon (today?) and take a look at the output with the new field and see if any adjustments are needed.
There were many changes to the tracking code, which Omar reported on:
The new magnetic field is now available. See Norman's slides. It was decided that if the Pass 2 test works out OK, this will be included in Pass2.
Jeremy has the basic code for the new time stamp, based on a ns accurate epoch time, ready. There was some concern that this change would break various bits of code that depend on the way the getTime() method is currently implemented. It seemed best to leave the current definition until we have a better understanding on how well a switch to the new time will work.