Home » PANDA » PandaRoot » EMC » EMC resolution
| Re: EMC resolution [message #15619 is a reply to message #15567] |
Wed, 30 October 2013 15:23   |
Dima Melnychuk
Messages: 213
Registered: April 2004
Location: National Centre for Nucle...
|
first-grade participant |
From: *fuw.edu.pl
|
|
Some additional results on emc resolution from my side.
First of all after Jifeng put a latest version of digitization by default, (based on code for EMC feature extraction developed at KVI) the energy resolution is different.
I did study for barrel 30-130 degree range, 10 k events, 1 GeV photons.
For new digitization sigma=1.6%
For previous digitization sigma=1.2%
There are two options for non-uniformity, first is based on measurements and implemented by Christian Hammann, sigma=2.6%
And second one (linear non-uniformity) is based on fit to reproduce prototype data and implemented by Hossein Moeini, sigma=2.5%, so both options are very close.
You can use this option with
PndEmcHitProducer* emcHitProd = new PndEmcHitProducer();
TString nonuniformityFile=gSystem->Getenv("VMCWORKDIR");
nonuniformityFile+="/macro/params/EmcDigiNoniformityPars2.root";
emcHitProd->SetNonuniformityFile(nonuniformityFile.Data());
So non-uniformity definitely affect the result as well as newer digitization.
But you can see if you use non-uniform response the peak position is shifted and calibrartion/energy correction is necessary. And shift is in different direction for two implementations of non-uniformity. Hossein provided correction for his case but it was for older digitization and newer digitization shift a peak position itself a little bit. So it should be redone.
So I plan to redo energy correction for new digitization with both non-uniformity options and I hope rather soon.
2.6% resolution for 1 GeV photon is what Christian Hammann quoted before as a result in agreement with prototype data.
So when energy correction will be ready the question can be closed.
Dima
-
Attachment: energy1.png
(Size: 14.68KB, Downloaded 657 times)
-
Attachment: energy2.png
(Size: 15.18KB, Downloaded 634 times)
-
Attachment: energy3.png
(Size: 15.80KB, Downloaded 577 times)
-
Attachment: energy4.png
(Size: 16.12KB, Downloaded 695 times)
|
|
|
|
Current Time: Fri Oct 11 20:01:18 CEST 2024
Total time taken to generate the page: 0.01000 seconds
|
GSI Forum
Search
Help
Members
Login
Home
