My bad I missed to save the input file after uncommenting the RANDOM card.
Forget the SPAM
sorry
V.
On Tue, Jul 7, 2015 at 11:58 AM, Vittorio Boccone <
dr.vittorio.boccone_at_ieee.org> wrote:
> Dear Ana,
> all point point then to those general indications (
> http://www.fluka.org/content/course/NEA/lectures/StatSampl.pdf) which I
> was always given
>
> - Never forget that the variance itself is a stochastic variable
> subject to fluctuations
> - Be careful about the way convergence is achieved: often
> (particularly with biasing) apparently good statistics with few isolated
> spikes could point to a lack of sampling of the most relevant phase-space
> part
> - Plot 2D and 3D distributions! In those cases the eye is the best
> tool in judging the quality of the result
>
> I guess you have then a lot of bins and you lack statistics, although the
> merging tools should handle it. In your particular case those are escaping
> protons on the side of the target.
>
> I'll need to check it better, but I would increase the statistic and
> reduce the number of bins you have first.
>
> Vittorio
>
>
> On Mon, Jul 6, 2015 at 11:51 AM, Ferreira De Almeida Lourenco, Ana <
> am.lourenco_at_ucl.ac.uk> wrote:
>
>>
>> Dear FLUKA experts,
>>
>> I am simulating a proton beam in a target cylinder and scoring fluence
>> differential in energy and angle in a ring detector using a USRBDX card.
>>
>> For a non zero fluence I'm getting a error of zero. Why is the error
>> zero? Example of sum.lis file:
>> ...
>> Tot. resp. (Part/cmq/pr) 0.8798609 +/- 0.000000 %
>> ( --> (Part/pr) 0.8798609 +/- 0.000000 % )
>> ...
>>
>> Also, in the sum.lis files the angular distribution and respective
>> fluence are given in units of steradians and degrees. How are these two
>> quantities related?
>>
>> Please find attached my input file.
>>
>> Many thanks,
>>
>> Ana
>>
>
>
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Received on Tue Jul 07 2015 - 13:37:14 CEST