Not at all. A region will be considered as magnetic only if it is declared
as such in the respective ASSIGNMAT card. And the reason for that is what
I indicated below as second and more important argument.
Cheers
Francesco
**************************************************
Francesco Cerutti
CERN-EN/STI
CH-1211 Geneva 23
Switzerland
tel. ++41 22 7678962
fax ++41 22 7668854
On Tue, 18 Feb 2014, Mina Nozar wrote:
> 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 - 21:45:02 CET