Re: [fluka-discuss]: Problem about Magnetic Field routine

From: Jilberto Antonio Zamora Saá <jzamorasaa_at_jinr.ru>
Date: Fri, 07 Aug 2020 12:48:24 -0400

Dear Paola

Thank you very much for your answer.

regards,
Jilberto

---
*******************************************************************
  Dr. Jilberto Zamora Saa
  Dzhelepov Laboratory of Nuclear Problems
  Joint Institute for Nuclear Research
  141980 Dubna, Moscow region, Russia
  phone: +(496)2162589 (Office)
  phone: +7(915)4671294 (Mobile)
  email: jzamorasaa_at_jinr.ru
********************************************************************
El 07-08-2020 11:04 am, Paola Sala escribió:
> Hello
> as a general advice,in case of doubt about a magnetic field
> implementation, I would suggest to run a very simple case with "known"
> solution. For instance, monochromatic muons at a fixed angle with 
> respect
> to the B-field,  and score muon fluence all over your geometry.
> For the specific case: if I understand correctly, you have a 10T field
> along z, and a target region with a radius of 5cm. The target radius is
> smaller than the curvature radius for an average transverse momentum  
> of
> about 300 MeV, and particles are trapped both in the target and in the
> calo. It is not clear to me that the ratio should cangae a lot. What 
> about
> absolute values?
> About the MAGFIELD card: the required maximum angle of 0.5 degrees is 
> by
> far too small, it will only slow down the calculations. Try with 
> something
> around 20 degrees.
> Regards
> Paola
> 
>> Dear fluka expert
>> 
>> 
>> I'm trying to simulate the Au ions beam impinging a region called
>> Target. I'm interested in scoring the energy deposited both regions:
>> TARGET and CALO,  by means of eventbin card.
>> 
>> Both regions contain a Magnetic field which is already defined in a
>> MagFied.f file. Once I ran the simulation (compile the ldpmqmd library
>> and compile MagFied.f file ) I did a plot "CALO vs TARGET" energy
>> deposited. The result considering the Magnetic Field are almost the 
>> same
>> when I ran the simulation without it. On the contrary, I would expect
>> that the energy in TARGET increase due to the Pions should be trapped 
>> by
>> the Magnetic field and rotate around z-axis (due to Lorentz force) and
>> the be absorbed in Target.
>> 
>> I would appreciate your help and comments about my Magnetic Field
>> routine or about my physics-reasoning.
>> 
>> 
>> All the files are attached.
>> 
>> Thank in advance.
>> 
>> regards,
>> Jilberto
>> 
>> 
>> 
>> --
>> *******************************************************************
>>   Dr. Jilberto Zamora Saa
>>   Dzhelepov Laboratory of Nuclear Problems
>>   Joint Institute for Nuclear Research
>>   141980 Dubna, Moscow region, Russia
>>   phone: +(496)2162589 (Office)
>>   phone: +7(915)4671294 (Mobile)
>>   email: jzamorasaa_at_jinr.ru
>> 
>> ********************************************************************
> 
> 
> Paola Sala
> INFN Milano
> tel. Milano +39-0250317374
> tel. CERN   +41-227679148
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Received on Fri Aug 07 2020 - 20:40:11 CEST