Thanks for your answer Matteo!
From: Matteo Magistris <Matteo.Magistris_at_cern.ch>
Sent: 22 March 2019 10:57
To: Tom Niessen <tom.niessen_at_raysearchlabs.com>
Subject: RE: Number of decimals in BEAM card
Dear Tom,
What you find in the .out is simply a summary with rounded values.
If you use the free format, fluka will take the number you give in double precision, i.e. with about 15 decimal digits. And then it will also use it in double precision, and just print a rounded version in the .out file.
Yours,
Matteo
From: owner-fluka-discuss_at_mi.infn.it<mailto:owner-fluka-discuss_at_mi.infn.it> <owner-fluka-discuss_at_mi.infn.it<mailto:owner-fluka-discuss_at_mi.infn.it>> On Behalf Of Tom Niessen
Sent: 21 March 2019 11:05
To: fluka-discuss_at_fluka.org<mailto:fluka-discuss_at_fluka.org>
Subject: [fluka-discuss]: Number of decimals in BEAM card
Dear experts,
I simulate a beam using the following settings:
BEAM , -0.289779492292, 0.000618670020788, , 0.0, 0.0, ,HEAVYION
However, when I check the .out file I see that the beam energy and momentum spread are rounded to 4 decimals:
***** Next control card ***** BEAM -0.2898 6.1867E-04 0.000 0.000 0.000 0.000 HEAVYION
Are the beam energy and momentum spread just rounded in the .out file notation or are these the actual energies used? If rounding is only done the .out notation, is there any limitation to the number of decimals that can be used in the BEAM card?
Kind regards,
Tom Niessen
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Received on Fri Mar 22 2019 - 17:31:57 CET