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Re: new FTF generator in pandaroot [message #17338 is a reply to message #17335] Tue, 23 September 2014 10:35 Go to previous messageGo to previous message
Aida Galoyan is currently offline  Aida Galoyan
Messages: 79
Registered: May 2007
Location: Dubna
continuous participant
From: *dubna.ru
Hi Donghee,

> What about random seed during the production?

In Geant4 and in FTF is used a random number generator
implemented in Pythia. It is not start
from a single number. It is not start from computer time.
To download final generator state
it is needed to open in PbarP.mac or PbarA.mac the line

//#saverand

If it is given #saverand, the state will be saved in file
initial.conf after each event.
It requires some additional time. After last event,
the state will be saved.
You can continue your job with final stored state,
if you open in the mac-files the following lines

//#initrand
//initial.conf

> If I do two times without change option string, output will be
> different?

No. It will be the same.

>./FTFGen PbarP.mac | mv FTF.root FTF_1.root
> ./FTFGen PbarP.mac | mv FTF.root FTF_2.root

It will be an exact copie.

> or Do I need some more action to get different events from output?

You'll need as described above.

Best regards!
Aida
 
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