GSI Forum - RDF feed
https://forum.gsi.de/index.php
Abnormal distribution
https://forum.gsi.de/index.phpindex.php?t=rview&goto=14377&th=3765#msg_14377
please see the plot in the attachment.
The X-axis shows the polar angle in unit rad, the Y axis shows the energy difference (E_{rec}-E_{truth}) in unit GeV.
We can find,
a) the Shashlyk calorimeter has a worse resolution, but a longer right-side tail, it implies a incorrect reconstruction in EMC cluster or bump.
b) for the intersection between forward calorimeter and shashlyk calorimeter, still a longer right-side tail exists.
c) barrel calorimeter looks good, a left-side tail arises from the energy leak in crystal and energy loss before hitting crystals.
d) for the intersection between barrel and backward, there exists a large gap, but abnormal reconstruction near theta value 2.5.
e) energy reconstruction near the edge of backward calorimeter need more correction.
What are your opinions?
The energy reconstruction determines the photon detection efficiency.]]>Jifeng Hu2013-01-21T17:45:17-00:00Re: Abnormal distribution
https://forum.gsi.de/index.phpindex.php?t=rview&goto=14378&th=3765#msg_14378
Could you clarify which reconstructed cluster energy do you use, i.e.
since the peak energy provided by theHit->GetEnergyCorrected() has a shift, temporarily I made a further correction by a factor 1.009.
Attachment eps file shows the difference between
E1C-E1, E1CC-E1, and E1CC-E1C.
PndEmcClusterAna class is used to save information from PndEmcBump.
PndEmcMcTruthWriter class is used to save information from PncMCTrack.
best regards.]]>Jifeng Hu2013-01-22T10:40:28-00:00Re: Abnormal distribution
https://forum.gsi.de/index.phpindex.php?t=rview&goto=14381&th=3765#msg_14381
theHit->GetEnergyCorrected()
is obsolete and should be in principle removed.
What I personally used/implemented is the class
PndEmcClusterCalibrator(method),
which for
method=1 uses the same approach, but with corrected parametrization
and for
method=2 uses the same approach as in PndEmcCorrection class
but with recalculated histograms
Could you recalculate you initial plot with these corrections?
Dima]]>Dima Melnychuk2013-01-22T11:55:55-00:00Re: Abnormal distribution
https://forum.gsi.de/index.phpindex.php?t=rview&goto=14387&th=3765#msg_14387
With your suggestion, some new plots are got. you can find
them in the eps file attached.
conclusions:
a> calibration still needs further improvement for crystals near backward endcap edges.
b> calibrator2 looks better for intersection between forward and barrel calorimeter, but a little problem in theta ranges near value 2.5.
However, results looks much better.
Thanks for your correction.