From: Giuseppe Battistoni (Giuseppe.Battistoni@mi.infn.it)
Date: Mon Jan 24 2005 - 19:00:43 CET
Hello Martin,
thanks for your message. I try to give some answers
1) PEG file to prepare PEMF: there you spotted a mistake
Probably AP and UP where interchanged on the file which went to the web
site. About UE and UP values: in principle you can put a (total) energy
value which is larger that what you need. So this is not a mistake.
However, in order to have a better tabulation, it would be recommended to
avoid to exceed so much the natural value for your problem.
2) About your question no. 2. Provided that you build your USRBIN grid in
the right way, you will have no problem at all. USRBIN will return the
energy (or whatever you requested) deposited in the region of space
defined by the coordinates that you put in the USRBIN definition. In the
case described here they are measuring the energy (rescaled to dose) in
the TLDs
3) You are right: in order to have the ascii file you have to process the
usbsuw output using usbrea.f (that you find in the flutil directory)
Sorry for having omitted this.
Thank you again for the problems that you pointed out.
Giuseppe Battistoni for the FLUKA team
On Mon, 24 Jan 2005, Holbourn, MP (Martin) wrote:
> Date: Mon, 24 Jan 2005 11:09:53 -0000
> From: "Holbourn, MP (Martin)" <m.p.holbourn@dl.ac.uk>
> To: support@fluka.org
> Subject: Help for a raw beginner
>
> Dear experts,,
> I am just starting to get to grips with FLUKA and downloaded and installed the latest version last week on my Linux Redhat system. Installation was succesful, as far as I can tell.
> I have started looking at the sample problem relating to the gas bermsstralung case and have manged to get it running but have some questions relating to it, and would be grateful for any comments.
>
> 1. The peg file seems to have some curious, to my mind, energy cuts.
> $INP AE=.521,UE=1500000.5211,AP=1000000.01,UP=50. $END
> Why is UE set to 1500000.521 MeV when the energy of the electrons is 1500 MeV (+rest energy)? Why is AP set to 1000000.01 MeV, a very high value and greater than UP?
>
> 2. The initial electrons target in the i atmospeher gas target but would then seem to target in the steel flange and "shower" there. This would upset the reults wouln't it? How is this taken care of in the running of the problem or the analysis using USRBIN?
>
> 3. The usage notes suggest suggest that running usbsuw to analyse the unformatted output produces a formatted file by default called *_sum.lis. I cannot get usbsuw to create this file, all it seems to do is create another unformatted file. What is going on here? I have checked the fortran file usbsuw.f and there does not seem any code to write formatted output.
>
> ANy help or suggestions would be gratefully received.
> Also is there likely to be Fluka course anywhere soon. I missed the recent on in Houston?
>
>
> Martin Holbourn
> Radiation Protection Adviser
>
> Daresbury Laboratory
> Daresbury
> Warrington
> Cheshire
> WA4 4AD
>
> Tel: 01925 603266
> Fax: 01925 603381
> mailto:m.p.holbourn@dl.ac.uk
>
>
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