GSI Forum: EMC » forward endcap quest goes on

Home » PANDA » PandaRoot » EMC » forward endcap quest goes on

Show: Today's Messages :: Polls :: Message Navigator

Re: forward endcap quest goes on [message #8959 is a reply to message #8956]

Wed, 08 July 2009 14:58

mpeliz
Messages: 51
Registered: February 2008
Location: Ruhr-Universitaet Bochum

continuous participant

From: *ep1.ruhr-uni-bochum.de

Hello Irina,

as Bertram mentioned in his previous posting the shower in a crystal starts not at the surface, but inside the crystal.
This shift is taken into account in the digitization. We add 6.3 cm
to the position of the crystal in direction of the crystal axis. Therefore the EmcDigi is shifted with respect to the EmcHit.
Taking into account the cos(theta) the observed shift in Ola's plots for digis and hits is consistent with that.
At the moment I do not understand the shift between the digi and the cluster position. I will carefully check.

However, for the reconstruction we usually don't care about the z-position. We should check the reconstructed theta and phi angle in addition. Therefore one should look to the difference of the cluster position (theta, phi) wrt to the corresponding MC truth angles. This is replacing the points in the bottom left picture in points_g4_fwendcap_m3changed_fixed.png by the cluster. Ola could you change your macro and do these plots, please? BTW, is the macro in SVN? If not, could you check it in? This would be helpful for understanding the plots in detail.

Cheers,
Marc

Report message to a moderator

[Message index]

		forward endcap quest goes on By: Irina Brodski on Fri, 22 May 2009 14:56
		Re: forward endcap quest goes on By: Irina Brodski on Tue, 26 May 2009 15:21
		Re: forward endcap quest goes on By: Irina Brodski on Tue, 26 May 2009 16:51
		Re: forward endcap quest goes on By: Bertram Kopf on Tue, 26 May 2009 23:04
		Re: forward endcap quest goes on By: Irina Brodski on Tue, 26 May 2009 23:58
		Re: forward endcap quest goes on By: Aleksandra Biegun on Wed, 10 June 2009 16:58
		Re: forward endcap quest goes on By: Irina Brodski on Wed, 10 June 2009 21:03
		Re: forward endcap quest goes on By: Aleksandra Biegun on Thu, 02 July 2009 15:57
		Re: forward endcap quest goes on By: Irina Brodski on Wed, 08 July 2009 12:45
		Re: forward endcap quest goes on By: mpeliz on Wed, 08 July 2009 14:58
		Re: forward endcap quest goes on By: Aleksandra Biegun on Thu, 09 July 2009 11:22
		Re: forward endcap quest goes on By: StefanoSpataro on Thu, 09 July 2009 11:24
		Re: forward endcap quest goes on By: Aleksandra Biegun on Thu, 09 July 2009 15:43

Previous Topic:	Mass calculation from vector<PndEmcDigi*> in EMC
Next Topic:	Question about emc crystal numbering

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Mar 07 03:55:14 CET 2025

Total time taken to generate the page: 0.01335 seconds