Re: [fluka-discuss]: Large size ERROR file produced during fluence scoring

From: <ashishsingh_at_barc.gov.in>
Date: Thu, 07 Jan 2021 21:06:59 -0800

On 2021-01-07 07:11, Paola Sala wrote:
> Dear Ashish Singh,
> the messages you get in the error files are geometry problems.
> As a general rule, it is not recommended to have primary particles
> starting exactly on a boundary, because of possible rounding problems
> (is
> the particle in region VOID or in region WALL?). The source routine
> takes
> care to solve most of those problems making use of the particle
> direction
> (few last lines in the source.f code). However, in some cases, you have
> particles starting on a boundary..with a small rounding : for instance,
> x=-210.000000000002 instead of x=-210.). this causes a mismatch between
> initial localization and tracking. The code is able to solve the
> problem,
> but it issues a warning message in the err file.
>
> Easiest solution: enlarge by a small amount your house so that all
> particles start already inside the walls (something like 1 micron on
> each
> side)
>
> Paola
>
>> Dear FLUKA experts,
>>
>> I am trying to score fluence using USERBDX & USERTRACK through a
>> target
>> air sphere of 10cm placed at 1m height inside a house structure filled
>> with air for 1 MeV photons. But error size is huge which ultimately
>> terminates the run due to storage issue. Screenshot of error and all
>> other input files are attached for your reference. Kindly suggest me
>> how
>> i can resolve this issue. Any help regarding this issue is much
>> appreciated. Thanks in advance.
>>
>> Regards,
>> Ashish Singh
>
>
> Paola Sala
> INFN Milano
> tel. Milano +39-0250317374
> tel. CERN +41-227679148
>
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Dear Paolo,

Thank you for your kind help. I have incorporated your suggestion and
now it's working fine.

Regards,
Ashish singh

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Received on Fri Jan 08 2021 - 08:31:23 CET

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