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Freezout coordinates [message #14453]

Sun, 24 February 2013 17:21

Daniel Wielanek
Messages: 14
Registered: October 2012
Location: Warsaw

occasional visitor

From: *internetdsl.tpnet.pl

Hi,
Is there any option to add to FairROOT freezoutt coordinates? I want to use them but after I run converters I loose those data. I want to avoid rewriting half of FairROOT classes to add 4 branches.

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Re: Freezout coordinates [message #14454 is a reply to message #14453]

Sun, 24 February 2013 18:53

Mohammad Al-Turany
Messages: 518
Registered: April 2004
Location: GSI, Germany

first-grade participant

From: *dip.t-dialin.net

Hi,

In which experiment you are? you need to change two classes and not the half of FairRoot! The changes are in the user classes and not in the base itself. I.e: In case you are using the example in FairBase, then you need to change FairMCTrack and FairStack to add your stuff Or the corresponding classes in your experiment branch).

Mohammad

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Re: Freezout coordinates [message #14455 is a reply to message #14454]

Sun, 24 February 2013 19:22

Daniel Wielanek
Messages: 14
Registered: October 2012
Location: Warsaw

occasional visitor

From: *internetdsl.tpnet.pl

Hi,
I just looked at FairUrqmdGenerator class that is used in one on example macros in MPDRoot, I noticed that there is reading data from text file and adding particles by FairPrimaryGenerator->AddTrack() and there are no field like freezout coordinates. If I understood this code this is only place where urqmd file i read, so if I don't add these points here I can't add those coordinates until I start reconstruction. Am I right?

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Re: Freezout coordinates [message #14457 is a reply to message #14455]

Mon, 25 February 2013 10:45

Mohammad Al-Turany
Messages: 518
Registered: April 2004
Location: GSI, Germany

first-grade participant

From: *gsi.de

Hi,

Ok, You can create your own PrimaryGenerator which inherits from FairPrimaryGenerator and overwrite the virtual method AddTrack or write you own AddTrack method and call it from your own ReadEvent in your generator. So in Summary you need 4-Classes to do this.

1. Your Generator in which you read the freezout coordinates in ReadEvent0
2. Subclass of the FairPrimaryGenerator that has an AddTrack method or what ever you call it that push your variable into the stack, this method you call from your ReadEvent()
3. Your own MCTrack which keep your parameter in the Tree
4. Your own Stack which holds the variable during simulation

Doing that you have to create your primary generator in the simulation macro and not the FairPrimaryGenerator.

Hope this will help you.

Cheers,

Mohammad

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