Ashok
reported that has brought the source code from CERN to UVic (fate), and
he did it by means of an ssh protocol. He was able to download
everything he wanted to get, but hasn't had a chance to compile it yet.
Everybody was very interested in this. It was suggested that Ashok
pass on this knowledge to Ian Gable and to Warren Shaw and eventually
to write down the instructions on a web-page.
Ashok told us that David Quarrie was extremely helpful with this endeavour.
Warren
received an email from Rob with instructions for the monitoring.
He has tried it out and it works, but hasn't received any instruction of what
to do with it next.
Richard pointed out that ultimately it should be possible to run the monitoring
code here at UVic, looking at data that resides at CERN, i.e. a remote
monitoring of the testbeam.
Tamara
presented progress of her noise studies. She looked at muon runs to obtain
noise from cells that were not hit by the muon beam. In order to get a
signal-free noise sample, she actually took muon runs taken at different
impact points and only chose cells away from the impact points for the noise
sample.She then plotted the average signal/noise ratio with the signal
from pion runs and the noise from muon runs. She is now looking at
what the best way might be to make a selection that removes the
background due to noise.
Richard suggested to choose a typical cluster region and calculate the
correlation coefficients between the cells. - Michel mentioned that
something like that has already been done by Manuella, who wrote a
note about it.
Tayfun
explained some more insight he gained into the systematics of the position
reconstruction analysis. With a simple diagram he demonstrated that as
the beam moves across the front face in an x-scan, the energy sharing between
the cells changes. In fact it explains some of the effect he sees, but not all
of it. He recalled that Sven earlier on had come to the conclusion that the
testbeam coordinate system is not perfect (it has a bit of an offset) and that the
beam is likely not completely horizontal when B9 is switched off.
Richard suggested to look at the high impact points and see what effect he
gets there. A small tilt in the module could produce the same effect, and
it might be impossible in the end to really pinpoint the exact cause.
Michel gave Tayfun some quick advice of how to go about to test for a module tilt
within TBRootAna.
Michel
reported that the clustering algorithm is now fully functional in TBRootAna,
and that he already ran lots of tests on it. He presented some results with
plots of numbers of cells per cluster and event and compared the clustering
algorithm with a simple selection of taking all cells above a 2 sigma threshold.
See the
TBRootAna example web page.
Margret
mentioned that she obtained a reply from Fares, who said that the file he
sent a year ago for the boundaries between the 3 EMEC longitudinal segments are
numbers for the warm module. But the differences between the warm and cold
numbers are very small.