RE: [fluka-discuss]: particle age jump at boundary crossing

From: Maruyama, Takashi <tvm_at_slac.stanford.edu>
Date: Tue, 10 Jun 2014 08:55:16 -0700

Thank you, Alberto. Good to hear from you.

This was entirely due to my mistake. I never used atrack before and without checking I presumed the particle age was at the start of transport. The age is at the end of transport. FLUKA is correct as always.

Takashi

-----Original Message-----
From: Alberto Fasso' [mailto:fasso_at_slac.stanford.edu]
Sent: Tuesday, June 10, 2014 4:27 AM
To: fluka-discuss_at_fluka.org
Cc: Maruyama, Takashi
Subject: Re: [fluka-discuss]: particle age jump at boundary crossing

Dear Takashi,

Nobody has yet tried to answer your question, but I think it is worth investigating this strange behavior.
Unfortunately the diagram you sent is not sufficient to understand what happens.
Could you please send your input file and the mgdraw routine?

Alberto

On Wed, 14 May 2014, Maruyama, Takashi wrote:

> I am having a very strange problem. Attached is a mgdraw dump of four cases.
> The low energy photons move from mreg=11 (Tungsten) to mreg=3 (Air) in
> less than a few mm step. But the particle age (atrack) jumps by 20 - 30 nsec.
> Similar age jump at boundary crossing is seen in neutrons as well. Any idea?
>
> Takashi Maruyama
> SLAC
Received on Tue Jun 10 2014 - 19:25:21 CEST