Dear Francesco,
So do I understand correctly that if one needs to assign/associate a
magnetic field to a region of interest in the ASSIGNMAT card, if one
uses the MAGNFIELD card for a simple magnetic field setting but NOT if
one uses the magfld.f to set and assign the magnetic field to a given
region.
Thanks and best wishes,
Mina
On 14-02-14 12:57 PM, Francesco Cerutti wrote:
>
> Dear Mina,
>
> first of all we just saw with Brandon that, if you are fine with a
> constant field, you do not need to write a magfld.f routine but it is
> enough to define it in the MGNFIELD card. Then ASSIGNMAT is essential
> to tell the code in which regions that field should be applied.
>
> Furthermore and more important, you definitely do not want to ask the
> code to go always through the magnetic tracking algorithm - by far
> more complex than a straight step - despite the fact that no magnetic
> field is present in your region, and to call the magfld.f routine at
> each substep to get back a humiliating zero.
>
> Ciao
>
> Francesco
>
> **************************************************
> Francesco Cerutti
> CERN-EN/STI
> CH-1211 Geneva 23
> Switzerland
> tel. ++41 22 7678962
> fax ++41 22 7668854
>
> On Fri, 14 Feb 2014, Mina Nozar wrote:
>
>> Hello Francesco and everyone else.
>>
>> Just trying to understand the flow/logic of assigning magnetic fields
>> in a region.
>>
>> Here is my understanding and a question where I lack understanding...
>>
>> 1) MGNFIELD card activates calling the subroutine MAGFLD defined in
>> mgfld.f
>> 2) In subroutine MAGFLD, one defines the intensity and direction of
>> the magnetic field(s) and assigns it to a given region(s).
>> 3) Set Field to Magfiled in the ASSINMAT card for the region(s) with
>> magnetic field.
>>
>> What I don't understand is why do we need to turn on magnetic field
>> in the ASSIGNMAT card? Is this not already set via MAGFLD?
>>
>> Best wishes,
>> Mina
>>
>> On 14-02-14 01:57 AM, Francesco Cerutti wrote:
>>>
>>> Hallo,
>>>
>>> actually, in case of constant magnetic field in all magnetic
>>> regions, the
>>> MGNFIELD card is enough (as stated in the manual). It will
>>> automatically
>>> feed the default magfld routine (the one provided in usermvax,
>>> where in
>>> fact the comment
>>> * 2 Tesla uniform field along +z:
>>> does not apply) and you do NOT need to link the latter into a
>>> customized
>>> executable, unless you want to modify it, since it is already in the
>>> standard FLUKA library and linked in the standard executable.
>>>
>>> Cheers
>>>
>>> Francesco
>>>
>>> **************************************************
>>> Francesco Cerutti
>>> CERN-EN/STI
>>> CH-1211 Geneva 23
>>> Switzerland
>>> tel. ++41 22 7678962
>>> fax ++41 22 7668854
>>>
>>> On Thu, 13 Feb 2014, Dr. Vittorio Boccone wrote:
>>>
>>> > No you should still include and link the default magfld routine
>>> which is
>>> > configured for a uniform magnetic field, as explained in the
>>> lecture and > the
>>> > tutorial.
>>> > Best
>>> > V.
>>> > Sent from my iPad
>>> > > On 13/feb/2014, at 22:42, "REDDELL, BRANDON D. (JSC-EV511)"
>>> > <brandon.d.reddell_at_nasa.gov> wrote:
>>> > > Thanks Vittorio.
>>> > > So in my simple problem, I am not using the magfld.f
>>> routine,
>>> > just only the MGNFIELD card. So, could you confirm if these
>>> > cards should work:
>>> > > MGNFIELD 20.0 0.2 0.10 0.0
>>> > 0.0 1.0
>>> > STEPSIZE 0.5 0.0 VAC2 0.0
>>> > 0.0 0.0
>>> > EMF
>>> > EMF-OFF
>>> > .
>>> > .
>>> > .
>>> > ASSIGNMA VACUUM VAC2 1.0
>>> > (the 1 here is at WHAT(5)
>>> > > Thanks.
>>> > > Brandon
>>> > > > >
>>> ____________________________________________________________________________
>>> > > From: Vittorio Boccone [dr.vittorio.boccone_at_ieee.org]
>>> > Sent: Thursday, February 13, 2014 2:47 PM
>>> > To: REDDELL, BRANDON D. (JSC-EV511); fluka-discuss_at_fluka.org
>>> > Subject: Re: [fluka-discuss]: magnetic field in vacuum
>>> > > Sure, check out the magnetic field exercise (solution) on the
>>> advanced
>>> > course:
>>> >
>>> http://www.fluka.org/fluka.php?id=course&sub=program&navig=2&which=triumf20
>>> > > 12
>>> > Best
>>> > V.
>>> > > On 2/13/2014 8:47 PM, REDDELL, BRANDON D. (JSC-EV511) wrote:
>>> > > FLUKA Users/Experts,
>>> > > > > Do the magnetic field settings in a region (using
>>> MGNFIELD
>>> > card along with WHAT card 5 in ASSIGNMA Card) work if the
>>> > region of the B field is a vacuum?
>>> > > > > Brandon
>>> > > > >
>>
>>
>
Received on Tue Feb 18 2014 - 21:31:22 CET