RE: [fluka-discuss]: MGDRAW & Biasing

From: Fasso, Alberto <fasso_at_slac.stanford.edu>
Date: Sat, 17 May 2014 02:51:37 -0700

As Mario says, nothing will fail. But it depends much on what you want to do. Biasing means that you are sampling from the 'wrong' probability distributions, and particle weights are adjusted to ensure that some _average_ quantities stay the same.
If you use MGDRAW to score some average quantity, taking into account the weights may be sufficient (but then it is much better to use the FLUKA built-in scoring). But if you want to study some particle distribution you may get it wrong.
It depends also a lot on which kind of biasing you are using: some techniques are safer than others.

Alberto
________________________________________
From: owner-fluka-discuss_at_mi.infn.it [owner-fluka-discuss_at_mi.infn.it] On Behalf Of Santana, Mario [msantana_at_SLAC.Stanford.EDU]
Sent: Friday, May 16, 2014 9:35 AM
To: James Ryan; fluka-discuss_at_fluka.org
Subject: Re: [fluka-discuss]: MGDRAW & Biasing

James,

It is not a strict rule, nothing will fail if you do that. Just take into account the particle weight for your analysis, that's all.

Mario

From: James Ryan <james.ryan-4_at_postgrad.manchester.ac.uk<mailto:james.ryan-4_at_postgrad.manchester.ac.uk>>
Date: Friday, May 16, 2014 5:31 AM
To: fluka-discuss <fluka-discuss_at_fluka.org<mailto:fluka-discuss_at_fluka.org>>
Subject: [fluka-discuss]: MGDRAW & Biasing


Hello all,


I've read somewhere that if using MGDRAW one shouldn't use biasing. Is this a strict rule, or can biasing be used as long as when doing your analysis you take into account particle weight in the results?


Thanks,


James
Received on Sat May 17 2014 - 13:10:37 CEST