Re: [fluka-discuss]: Single scattering for proton beam

From: Paola Sala <paola.sala_at_mi.infn.it>
Date: Mon, 4 Nov 2013 08:38:24 +0100

Dear YuanChen
wrong. the MULSOPT card sets conditions for
 both hadrons/muons and electrons/positrons, including single scattering.
Regards
Paola
> Dear Fluka experts,
>
> When I read the Fluka Manual,it says "the MULSOPT card sets the tracking
> conditions for multiple Coulomb scattering (MCS), for
> both hadrons/muons and electrons/positrons.Can also be used to activate
> single scattering." In other words,this card can only be used to set
> single scattering for electrons,but not for protons.Right?
> Last time,paola told me "for micro-sized geometries,single scattering
> should be set for all steps". Now, If the incident particles are proton
> beam,for micro-sized geometries,I must set single scattering for proton
> beam.Right? But,how could I do this?
> Thanks for any suggestion.Thanks for your time.
>
> Best Regards
> YuanChen
>
>> -----Original E-mail-----
>> From: "Roberto Versaci" <roberto.versaci_at_gmail.com>
>> Sent Time: 2013-10-26 19:34:30
>> To: "fluka-discuss_at_fluka.org" <fluka-discuss_at_fluka.org>
>> Cc:
>> Subject: Re: Re: RE: [fluka-discuss]: How to set jagged geometries
>> (fwd)
>>
>> Dear Yuan,
>>
>> Please always reply to the discussion list, do not write private emails.
>>
>> What I meant with my last email, is exactly what Anton and Paola had
>> already written.
>> Quoting Anton who quotes Paola:
>> <<As Paola wrote to you about two weeks ago, 50 nm structures are
>> probably
>> too small for the physics models of the code. Let me quote: "the
>> geometry
>> you defined has layers as thin as 0.05 MICRONS. The models of the code
>> cannot be used for such thin layers. A minimum size of about 1 micron
>> should be kept to get meaningful results.">>
>> To put it short: the dimensions of the objects you want to model are too
>> small!
>>
>> For what concerns the use of PLA, you could have a look both at the
>> manual
>> and at the geometry lecture of FLUKA courses, this is the link to the
>> last
>> one:
>> https://www.fluka.org/free_download/course/dresden2013/Lectures/05_Geometry_1013.pdf
>>
>> Nevertheless, once again, please, keep clearly in mind what Paola,
>> Anton,
>> and myself have said about the dimensions!
>>
>> Cheers,
>>
>> Roberto
>>
>>
>>
>> ---------- Forwarded message ----------
>> Date: Fri, 25 Oct 2013 22:32:34 +0800 (CST)
>> From: yyc2011_at_mail.ustc.edu.cn
>> To: Roberto Versaci <roberto.versaci_at_gmail.com>
>> Subject: Re: Re: RE: [fluka-discuss]: How to set jagged geometries
>> (fwd)
>>
>> Dear Roberto,
>>
>> What is your meaning?You have not answered my question.What is your
>> opinion?How to define the geometry?
>>
>> Best Wishes
>> YuanChen
>> > -----Original E-mail-----
>> > From: "Roberto Versaci" <roberto.versaci_at_gmail.com>
>> > Sent Time: 2013-10-25 21:01:24
>> > To:"fluka-discuss_at_fluka.org" <fluka-discuss_at_fluka.org>
>> > Cc:
>> > Subject: Re: RE: [fluka-discuss]: How to set jagged geometries (fwd)
>> >
>> > Dear Yuan,
>> >
>> > Reading Anton's reply I realized I did not have noticed the dimensions
>> of
>> > your geometry. He is totally right in his comments about the
>> dimensions!
>> > They are definitely too small!
>> >
>> > Sorry,
>> >
>> > Roberto
>> >
>> >
>> >
>> >> Dear Yuan,
>> >>
>> >> You could consider using PLA bodies (generic planes) to define your
>> >> triangles.
>> >> Cheers,
>> >>
>> >> Roberto
>> >>
>> >>
>> >>
>> >> On Fri, 25 Oct 2013, yyc2011_at_mail.ustc.edu.cn wrote:
>> >>
>> >>> Dear Vasilis,
>> >>>
>> >>> Thanks for your reply.
>> >>> The attachment is the schematic diagram.The geometry is like
>> this.The
>> >>> height of the triangle is 0.000005 centimeters.If I want to define
>> this
>> >>> geometry,how should I do?
>> >>> Thanks for any suggestions.
>> >>>
>> >>> Best Regards
>> >>> YuanChen
>> >>>
>> >>>
>> >>>
>> >>>
>> >>>> -----Original E-mail-----
>> >>>> From: "Vasilis Vlachoudis" <Vasilis.Vlachoudis_at_cern.ch>
>> >>>> Sent Time: 2013-10-25 17:43:39
>> >>>> To: "yyc2011_at_mail.ustc.edu.cn" <yyc2011_at_mail.ustc.edu.cn>,
>> >>>>
>> >>>> Cc:
>> >>>> Subject: RE: [fluka-discuss]: How to set jagged geometries
>> >>>>
>> >>>> Hi Yuan,
>> >>>>
>> >>>> could you please be more explicit what you mean by jagged maybe a
>> drawing
>> >>>> will help.
>> >>>> Please also give a look on the course lecture on geometry and
>> especially on
>> >>>> Geometry II
>> >>>> for use of lattices or voxels.
>> >>>> Vasilis
>> >>>>
>> >>>> ________________________________________
>> >>>> From: owner-fluka-discuss_at_mi.infn.it
>> [owner-fluka-discuss_at_mi.infn.it] on
>> >>>> behalf of yyc2011_at_mail.ustc.edu.cn [yyc2011_at_mail.ustc.edu.cn]
>> >>>> Sent: 25 October 2013 09:57
>> >>>> To: fluka-discuss_at_fluka.org
>> >>>> Subject: [fluka-discuss]: How to set jagged geometries
>> >>>>
>> >>>> Dear Fluka experts,
>> >>>>
>> >>>> I want to set jagged geometries in my simulation.But,I don't know
>> how to
>> >>>> set jagged geometries in the Fluka.Could you help me or could you
>> give me
>> >>>> any suggestions?
>> >>>> Thanks for your time.Thanks for any suggestions.
>> >>>>
>> >>>> Best Regards
>> >>>> YuanChen
>> >>>>
>> >>>>
>> >>>>
>> >>>>
>> >>>
>> >>
>> >>
>> >
>> > --
>> > Alberto Fass
>> >
>>
>


Paola Sala
INFN Milano
tel. Milano +39-0250317374
tel. CERN +41-227679148
Received on Mon Nov 04 2013 - 09:30:26 CET

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