Re: [fluka-discuss]: Re: fort.88 files

From: <Andrea.Mairani_at_mi.infn.it>
Date: Tue, 17 Sep 2013 14:47:42 +0200

Dear Jeremy,

 If I do not need the detail of
> the PRECISIOn default can I just use NEW-DEFA?

Yes, you should just check carefully in the manual that the settings match
your problem.

Best Regards,
Andrea


> Thanks,
> Jeremy
>
>
> On Sun, Sep 1, 2013 at 5:42 AM, <Andrea.Mairani_at_mi.infn.it> wrote:
>
>> Dear Jeremy,
>> Looking at your inputs you have used the following DEFAULTS
>> DEFAULTS 0.0 0.0 0.0 0.0 0.0 0.0
>> SHIELDIN
>>
>> SHIELDINg
>>
>> * Low energy neutron transport on down the thermal energies
>> included,
>> (the neutron high energy threshold is set at 20 MeV)
>>
>> * Non-analogue absorption for low energy neutrons with probability
>> 0.95 for the last (thermal) groups
>>
>> * Particle transport threshold set at 10 MeV, except neutrons (1E-5
>> eV), and (anti)neutrinos (0, but they are discarded by default anyway)
>>
>> * Multiple scattering threshold for secondary charged particles
>> lowered to 20 MeV (= primary ones)
>>
>> * Both explicit and continuous heavy particle bremsstrahlung and
>> pair
>> production inhibited
>>
>> * EMF off!!! This default is meant for simple hadron shielding only!
>>
>> As you see the EMF is off and in fort.88 you have
>>
>> QLTWEI,IJ,ECONTR,KTRACK,MTRACK,ETRACK,AMIJ,IZIJ,MREG,ICALL
>> 1.0000000000000000E+030 211 1.0470416009752087E-003
>> 0 0 1.0470416009752087E-003 0.0000000000000000
>> 0 3 504
>> J0TRCK,JTRACK 0 7
>>
>> which is related to EM below threshold, in fact you have EMF off. If you
>> use the PRECISIOn DEFAULTS for example you will not have the problem.
>> Please, check if the PRECISIOn DEFAULTS match what you want to simulate.
>>
>> Best Regards,
>> Andrea
>>
>>
>> > Hi Andrea,
>> >
>> > My input file is attached. It is a simple geometry consisting of an
>> O-18
>> > beam incident on steel, followed by concrete, and then finally soil. I
>> am
>> > trying to generate a dose equivalent and star density map with USRBIN.
>> >
>> > Thanks,
>> > Jeremy
>> >
>> >
>> > On Tue, Aug 27, 2013 at 5:48 AM, <Andrea.Mairani_at_mi.infn.it> wrote:
>> >
>> >> Dear Jeremy,
>> >> This printout occurs if the quality factor turns out to be <0.95 or
>> >> >500.
>> >> In this case the code set it back to 1 and warns the user. The point
>> is
>> >> to understand why the original QLTWEI value falls outside
>> expectations.
>> >> Please, can you provide us your input so we can understand better
>> your
>> >> problem?
>> >> Best Regards,
>> >> Francesco and Andrea
>> >>
>> >>
>> >>
>> >> > FLUKA users,
>> >> >
>> >> > I am attempting to generate a dose equivalent distribution with
>> >> > WHAT(2)=DOSEQLET in USRBIN. When I do this a large fort.88 file is
>> >> > generated. I have attached a copy of the fort.88 file generated
>> from a
>> >> > test
>> >> > run of 100 primary particles.
>> >> >
>> >> > I have two questions:
>> >> >
>> >> > 1) What is the purpose of this file?
>> >> > 2) Is there any way to disable its production? These files becomes
>> >> very
>> >> > large (easily on the order of GB) for a larger number of primary
>> >> > particles.
>> >> >
>> >> > Thanks,
>> >> > Jeremy Northum
>> >> >
>> >>
>> >>
>> >>
>> >
>>
>>
>>
>
Received on Tue Sep 17 2013 - 16:12:03 CEST