Dear Mihaela,
did you put back the correct materials, i.e. steel to wall and argon
to target? Perhaps this is the problem: in my example I had left
vacuum to show you that the currents were the same, but in this case
no neutrons are generated.
You can also remove my USRBIN score to speed up the calculation.
Andrea
> I do not think that this is the problem because I made a new folder with a
> new .flair file.
> ________________________________________
> From: Andrea Fontana [andrea.fontana_at_pv.infn.it]
> Sent: 13 August 2018 14:43
> To: Mihaela Parvu
> Cc: andrea.fontana_at_pv.infn.it; fluka-discuss_at_fluka.org
> Subject: RE: [fluka-discuss]: Flux/fluence
>
> Hi Mihaela,
> the error is simply due to the fact that you are using the
> renamed .inp file (MIN_v2.inp), with the old MIN.flair file
> (which still try to load the old file MIN.inp).
>
> Simply remove the "_v2" from the filename and use MIN.inp
> or create a new .flair file by reading the .inp from an empty
> Flair project.
>
> Andrea
>
>> Dear Andrea,
>>
>> Thank you so much for your help. Unfortunately, now I get this plot
>> error.
>> It's like I do not have neutrons, but it is impossible. Also, When I try
>> to plot the geometry I get another error:
>>
>> plot 'MIN_v2_geometry.dat' ind 0 us 1:2 w l ls 1 notitle
>> <e< line 0: warning: Skipping data file with no valid points
>>
>> NEUTRONS USRBDX
>>
>> Started 2018.08.13 14:19:31
>> reset
>> set terminal wxt 0 enhanced raise title 'MIN_try1.flair-0: USR-1D
>> ../MIN
>> v2 31'
>>
>> set title 'USR-1D /MIN v2 31'
>> unset grid
>> set xlabel ''
>> set xtics
>> set ylabel ''
>> set ytics
>> set logscale x
>> set logscale y
>> unset logscale z
>> unset logscale cb
>> unset logscale x2
>> unset logscale y2
>> set key default
>> plot '../modified_CERN/MIN_v2_31_tab.lis' ind 0 us 1:3 w steps lw 2 lc
>> rgb
>> 'red' t 'Detector 1','' ind 0 us (sqrt($1*$2)):3:($3*$4/100.) w
>> errorbars
>> lw 2 lc rgb 'red' pt 0 ps 1 notitle
>> <e< gnuplot> plot '../modified_CERN/MIN_v2_31_tab.lis' ind 0 us 1:3 w
>> steps lw 2 lc rgb 'red' t 'Detector 1','' ind 0 us
>> (sqrt($1*$2)):3:($3*$4/100.) w errorbars lw 2 lc rgb 'red' pt 0 ps 1
>> notitle
>>
>> <e<
>>
>> ^
>>
>> <e< line 0: all points y value undefined!
>>
>> Gnuplot error
>>
>> ________________________________________
>> From: Andrea Fontana [andrea.fontana_at_pv.infn.it]
>> Sent: 13 August 2018 13:46
>> To: Mihaela Parvu
>> Cc: fluka-discuss_at_fluka.org
>> Subject: Re: [fluka-discuss]: Flux/fluence
>>
>> Dear Mihaela,
>> I have run your example and I see that you have forgotten the
>> normalization to the area of the first USRBDX card (output 25).
>>
>> Moreover this normalization should read 360000, while the
>> normalization of your second USRBDX card should read 360720.36
>> (and not 360000), to take into account the 6mm thickness of the wall.
>>
>> Even with this normalization correctly done, you will still
>> see differences because of the muons interactions in the steel of
>> the wall and in the argon of the target. If you put both materials
>> to vacuum, you will get the same fluxes.
>>
>> In attachment a corrected version of your input (I have added two
>> USRBIN cards to better visualize your results).
>>
>> Perhaps this discussion is useful:
>>
>> http://www.fluka.org/web_archive/earchive/new-fluka-discuss/9211.html
>>
>> Hope this helps,
>> Andrea
>>
>>> Dear Fluka experts,
>>>
>>> I am trying to simulate muon induced neutrons. For this I am using my
>>> own
>>> predefined source of muons with flux as a function of energy. When I
>>> use
>>> USRBDX, the fluence I am getting from VOID to wall does not coincide
>>> with
>>> the incident one.
>>> Can you please tell me help me? I have attached the input files
>>>
>>
>>
>> --
>> ========================================================================
>> Dr. Andrea Fontana tel: +39 0382 987991
>> Istituto Nazionale fax: +39 0382 423241
>> di Fisica Nucleare
>> Sezione di Pavia e-mail: andrea.fontana_at_pv.infn.it
>> Via Bassi 6 web : www.pv.infn.it/~fontana
>> 27100 PAVIA, Italy
>> ========================================================================
>>
>>
>>
>
>
> --
> ========================================================================
> Dr. Andrea Fontana tel: +39 0382 987991
> Istituto Nazionale fax: +39 0382 423241
> di Fisica Nucleare
> Sezione di Pavia e-mail: andrea.fontana_at_pv.infn.it
> Via Bassi 6 web : www.pv.infn.it/~fontana
> 27100 PAVIA, Italy
> ========================================================================
>
>
>
>
--
========================================================================
Dr. Andrea Fontana tel: +39 0382 987991
Istituto Nazionale fax: +39 0382 423241
di Fisica Nucleare
Sezione di Pavia e-mail: andrea.fontana_at_pv.infn.it
Via Bassi 6 web : www.pv.infn.it/~fontana
27100 PAVIA, Italy
========================================================================
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Received on Mon Aug 13 2018 - 16:29:39 CEST