Dear all,
Here is a combined report from Oslo and Bergen on the latest activities
(unfortunately not as impressive as the ones from some of the larger and
more experienced groups, in particular not this close to Christmas - .)
Bjørn:
Finishing the interaction point determination effort and his
Quark Matter poster. The BrVertexModule now produces a global vertex,
selected as the vertex with least error among the (BB, ZDC, TPM1 Track,
TPM1 Cluster) that is also consistent with the BB vertex. Has been
working with Michael and Andrei to obtain ZDC slewing corrections
(successfully, see separate mail.) Is also attempting to determine
the vertex x coordinate / undertainty, so far without success.
Truls:
Working on local tracking efficiency estimates for TPM1. Has generated
geant files for pions and protons with momenta 0.2, 0.5, 1 and 4 GeV,
thrown from nominal vertex, with MRS in 90 degrees. Reconstructible
tracks are digitized and added to raw events on the BrTPCSequence level,
using a class BrTPCSequenceAdder (so far available only in Oslo.)
Typical preliminary efficiencies have been found to be 95% (peripheral)
to 80% (central events.)
Jens Ivar:
Still studying cluster parameters, trying to determine good cuts
to separate noise clusters and good clusters in TPM1, and estimating
the influence of these cuts on the local tracking efficiency. In his
version of the BrTPCClusterFinder, cluster status can be determined
from total numbers of pads and timebins in the cluster, its maxADC
value and total charge.
Trine:
Trying to get updated with respect to new developments, and thinking about
how to make efficiency estimates and primary / secondary particle
corrections for spectrometer tracks.
In addition, we're about to have a new student in Oslo (Elin Enger) who
will most likely join the Brahms collaboration.
Merry Christmas to all of you,
Trine and the rest of the Norwegian group
This archive was generated by hypermail 2b29 : Wed Dec 20 2000 - 16:31:21 EST