No, you always need to set the appropriate flag in ASSIGNMAT, regardless
whether you use a simple field (MAGNFIELD only) or a programmed one
(magfld.f) .
On 2/18/14 11:17 AM, "Mina Nozar" <nozarm_at_triumf.ca> 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=triu
>>>>mf20
>>>> > > 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 - 22:51:29 CET