[fluka-discuss]: Re: source.f simulation gives zeroes

From: Horváth Dávid <David.Horvath_at_eli-beams.eu>
Date: Wed, 1 Aug 2018 13:23:08 +0000

Dear Alex,

It looks like the reason you are getting zero results is that there is an error with the energy unit conversion in your source routine.

The filename of the spectrum data file indicates they should be in MeV, but in the source routine the line: "TKEFLK (NPFLKA) = 1.D-6 * ENERGY" assumes keV. This conversion puts your maximum energy below the default production/transport limit, so the particles are not propagated.

After changing the conversion factor to 1.D-3, I get a reasonable looking spectrum.

I hope this solves your problem.

Kind regards,

David Horvath

From: owner-fluka-discuss_at_mi.infn.it <owner-fluka-discuss_at_mi.infn.it> on behalf of Ševčik Aleksandras <aleksandras.sevcik_at_ktu.edu>
Sent: 01 August 2018 12:47:18
To: fluka-discuss_at_fluka.org
Subject: [fluka-discuss]: source.f simulation gives zeroes

Hello Fluka experts,

I am trying to simulate a polychromatic beam imitating linac photon spectra. I am using a modified source.f routine which has been successfully used for 70kev x-ray generation, see attached. Now I want to simulate a linac spectrum, see attached .dat file. However, using a test setup (see attached *.inp) I get zeroes in the results. Could you please advise what possibly goes wrong? Should source.f be modified or .dat file is wrongly made? Thank you,


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Received on Wed Aug 01 2018 - 16:43:38 CEST

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