sorry:
typo:
> and assign them to TXFLK (NPFLKA) and TYFLK (NPFLKA)
rather XFLK (NPFLKA) and YFLK (NPFLKA).
> Dear Vladimir
>
> The variable are, as you say, in common BEAMCM. This is available in the
> FLUKA distribution, in the file
> $FLUPRO/flukapro/\(BEAMCM\) (note the parentheses)
> and has comments for each variable.
> In your case, XBEAM, YBEAM, ZBEAM give the centre of the beam spot,
> XSPOT and YSPOT the maximum and minimum radius of the beam spot.
>
> If you call a user SOURCE routine, none of the beam "quantities"
> (position, energy, etc" are set by the code. In particular, there will be
> no sampling of a position within the annulus.
>
> The distributed source.f template provides pre-programmed lines that
> assign
> to each particle the CENTRAL quantities given in the BEAM and BEAMPOS
> cards. This means, for example, that you do not need to change anything in
> the assignmant of the beam partcle id if you like the one given in the
> beam card, or that you do not have to bother about beam position if you
> use a pencil beam (not your case)
>
> In your case, you will have to sample an x and y position within YSPOT
> and XSPOT, and assign them to TXFLK (NPFLKA) and TYFLK (NPFLKA)
>
> Last but not least, one more warning: although the BEAM card in case of
> heavy ions asks for "energy per nuclear mass unit", both the PBEAM
> variable and the TKEFLK, PMOFLK variables are full ones.
>
> Hope this helps
> Paola
>
>> Dear Andrea! Thank you for response. I'm new in Fluka and I have used
>> mcnpx, where beam description is set using the corresponding cards. I
>> know that source.f is used when some source parameters cannot be
>> described
>> with built-in source (but in my case, an annular built-in source
>> used).How
>> to use parameters of this source in source.f?I know that there is COMMON
>> BEAMCM, but where I can get names of proper values for this and enother
>> COMMON-blocks? Best regards,Vladimir Fedorov 27.08.2017, 10:57,
>> "Andrea
>> Tsinganis" :Dear Vladimir, At first glance, it seems that in your
>> source
>> routine you are in fact explicitly asking for the particles to be
>> generated using the position and direction defined in the BEAMPOS
>> card:Â *
>> Cosines (tx,ty,tz)TXFLK (NPFLKA) = UBEAMTYFLK (NPFLKA) = VBEAMTZFLK
>> (NPFLKA) = WBEAMÂ * Particle coordinatesXFLK (NPFLKA) = XBEAMYFLK
>> (NPFLKA)
>> = YBEAMZFLK (NPFLKA) = ZBEAMÂ This of course defines a point source at
>> (0,0,-1). You can adapt this part of the routine with the appropriate
>> coordinate direction sampling and to describe the desired source
>> geometry. Best regards,Andrea   On Sun, Aug 27, 2017 at 8:33 AM,
>> Fedorov Vladimir wrote:Dear experts! For my problem, I need the disk
>> 12C
>> beam with some spectrum. For this I use sourse.f. and SOURCE card. Â I
>> can
>> not understand why, when the SOURCE card is desabled, I get the expected
>> uniform distribution from the disk source (fig1.png), and when the
>> SOURCE
>> card is enabled, the distribution has a maximum in the center
>> (Fig2.png).
>>  I ask for your help. --
>> Best regardsV. Fedorov   --
>> Best regardsV.
>> Fedorov (¹Æ§™©Ú맲æìr¸©¶*'~º&¶¬™¨¥Šx%ŠËZ¶m¦Ïÿà –颸?~[¤j˜i‰Öœr)ß
>
>
> Paola Sala
> INFN Milano
> tel. Milano +39-0250317374
> tel. CERN +41-227679148
>
> __________________________________________________________________________
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>
Paola Sala
INFN Milano
tel. Milano +39-0250317374
tel. CERN +41-227679148
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Received on Mon Aug 28 2017 - 14:00:30 CEST