Re: Energy deposited in Gas not extrapolating to zero

From: Stefan Roesler <>
Date: Sun, 16 Jan 2011 11:27:14 +0100

Dear Howard

After brief discussion with Alberto we are both not sure if we can answer
based on the few information which you gave.

Why should it extrapolate linearly towards lower pressure? There could be
geometry and physics effects which could cause a different behaviour. I
suggest that you run for more pressure values at < 1atm, maybe in a log
binning to investigate the validity of your assumption of linear

Best regards

On Tue, 21 Dec 2010, Howard Matis wrote:

> I just made a plot of the energy deposited in a gas (argon). I calculated the energy
> deposited by summing up the energy in EVENTBIN.
> The pressure scan was made by 1) calculating the total energy with
> versions 2010 and versions 2008. The "em energy" with Fluka 2008.
> As you can see in the plot, I get the same results with 2010 Fluka and 2008 Fluka.
> However, all three plots extrapolate to energy deposition at zero gas density.
> All three plots are very linear. Can someone explain why the energy does not
> extrapolate to zero energy deposition? I am enclosing my plot.
> Howard Matis
Received on Sun Jan 16 2011 - 13:11:40 CET

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