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From: <arghyac_at_barc.gov.in>

Date: Fri, 27 Apr 2018 17:09:14 +0530

Thank you very much. Now it is working fine.

On 2018-04-23 19:02, Giuseppe Battistoni wrote:

*> Dear ArghyaC
*

*> there were two problems:
*

*> 1) all DIMENSION and DATA statements have to be placed
*

*> before any other operative instructions, i.e. at the beginning of the
*

*> routine.
*

*> 2) starting from DIMENSION CENTERS(5) there were a few lines
*

*> which were not correctly indented. In fortran the instruction
*

*> has to begin in column 7
*

*>
*

*> In attachment the corrected routine
*

*> G.B.
*

*>
*

*> On 23/04/2018 14:43, arghyac_at_barc.gov.in wrote:
*

*>> On 2017-09-16 14:15, Andrea Fontana wrote:
*

*>>> Hello Arghya,
*

*>>> the idea is to save the x coordinates of the five centers in the
*

*>>> array CENTERS and then to randomly generate the index in the interval
*

*>>> 1:5 to select a random center among the five. The array looks like:
*

*>>>
*

*>>> ARRAY(1) = -10.
*

*>>> ARRAY(2) = -5.
*

*>>> ARRAY(3) = 0.
*

*>>> ARRAY(4) = 5.
*

*>>> ARRAY(5) = 10.
*

*>>>
*

*>>> Actually, if you check in the manual of FLUKA, FLRNDM returns a
*

*>>> uniform random number in the interval [0,1), i.e. with 1 excluded:
*

*>>> so it would be better to write 1+5*FLRNDM(XDUMMY) to have a random
*

*>>> index among 1,2,3,4,5.
*

*>>>
*

*>>> In Fortran you can use the implicit type declaration (as in the FLUKA
*

*>>> user routines) and so you can skip both REAL*4 or REAL*8 instructions
*

*>>> and simply write a DIMENSION instruction. FLRNDM returns a 64-bit
*

*>>> number and the conversion is done automatically: in your case I
*

*>>> think
*

*>>> this is not relevant since you round your numbers...
*

*>>>
*

*>>> So a better version of the code is:
*

*>>>
*

*>>> DIMENSION CENTERS(5)
*

*>>> DATA CENTERS/-10.,-5.,0.,5.,10./
*

*>>>
*

*>>> INDEX = FLOOR(1+5*FLRNDM(XDUMMY))
*

*>>> X0 = CENTERS(INDEX)
*

*>>>
*

*>>> CALL RACO(TXX, TYY, TZZ)
*

*>>>
*

*>>> RADIUS = R*FLRNDM(XDUMMY)
*

*>>> XFLK (NPFLKA) = X0 + RADIUS*TXX
*

*>>> YFLK (NPFLKA) = RADIUS*TYY
*

*>>> ZFLK (NPFLKA) = RADIUS*TZZ
*

*>>>
*

*>>> I hope that now it is more clear. Please test it in your simulation
*

*>>> and let us know in case of other doubts.
*

*>>>
*

*>>> Best regards,
*

*>>> Andrea
*

*>>>
*

*>>>> On 2017-09-15 20:10, Andrea Fontana wrote:
*

*>>>>> Dear Arghya,
*

*>>>>> Â what about choosing randomly among the 5 sphere centers?
*

*>>>>> Let us say with a code like:
*

*>>>>>
*

*>>>>> Â Â Â Â Â REAL*4 CENTERS(5), X0
*

*>>>>> Â Â Â Â Â DATA CENTERS/-10.,-5.,0.,5.,10./
*

*>>>>>
*

*>>>>> Â Â Â Â Â X0 = CENTERS(FLOOR(6*FLRNDM(XDUMMY)))
*

*>>>>>
*

*>>>>> where X0 is the center of your current sphere and then:
*

*>>>>>
*

*>>>>> Â Â Â CALL RACO(TXX, TYY, TZZ)
*

*>>>>> Â Â Â RADIUS = R*FLRNDM(XDUMMY)
*

*>>>>> Â Â Â XFLK (NPFLKA) = X0 + RADIUS*TXX
*

*>>>>> Â Â Â YFLK (NPFLKA) = RADIUS*TYY
*

*>>>>> Â Â Â ZFLK (NPFLKA) = RADIUS*TZZ
*

*>>>>>
*

*>>>>> You have to generate 5 times histories, but the result should be
*

*>>>>> the one you are looking for. I hope this helps.
*

*>>>>>
*

*>>>>> Kind regards,
*

*>>>>> Andrea
*

*>>>>>
*

*>>>>> Il 15/09/2017 14:15, arghyac_at_barc.gov.in ha scritto:
*

*>>>>>> Dear Experts,
*

*>>>>>>
*

*>>>>>> Â Â I need to simulate 5 spherical sources with different spatial
*

*>>>>>> co-ordinate in a single source.f card.
*

*>>>>>>
*

*>>>>>> Â Â I model one sphere (centre at (0,0,0) in source.f card as
*

*>>>>>> follows
*

*>>>>>>
*

*>>>>>> *particle corodinate
*

*>>>>>> Â Â Â CALL RACO(TXX, TYY, TZZ)
*

*>>>>>> Â Â Â RADIUS = R*FLRNDM(XDUMMY)
*

*>>>>>> Â Â Â XFLK (NPFLKA) = RADIUS*TXX
*

*>>>>>> Â Â Â YFLK (NPFLKA) = RADIUS*TYY
*

*>>>>>> Â Â Â ZFLK (NPFLKA) = RADIUS*TZZ
*

*>>>>>>
*

*>>>>>> I guess I need to editÂ XFLK (NPFLKA), YFLK (NPFLKA), ZFLK
*

*>>>>>> (NPFLKA) to
*

*>>>>>> sample 5 spherical sources in single subroutine.
*

*>>>>>> Co-ordinate of other 4 sphere's centre are (-10,0,0),
*

*>>>>>> (-5,0,0),(5,0,0)
*

*>>>>>> and (10,0,0). radius of each = 1.5 cm.
*

*>>>>>>
*

*>>>>>> Now how to sample other spheres here or how to edit it to
*

*>>>>>> accommodate
*

*>>>>>> all the 5 sources at the same time.
*

*>>>>>>
*

*>>>>>> Kindly give some suggestions.
*

*>>>>>>
*

*>>>>>> Thanking you in advance.
*

*>>>>>>
*

*>>>>>> With regards,
*

*>>>>>> Arghya
*

*>>>>>>
*

*>>>>>> __________________________________________________________________________
*

*>>>>>> You can manage unsubscription from this mailing list at
*

*>>>>>> https://www.fluka.org/fluka.php?id=acc_info
*

*>>>>>>
*

*>>>> Dear Sir/Madam,
*

*>>>> Thank you very much for quick reply.
*

*>>>> I am beginner and not much excellence in Fortran programming. So
*

*>>>> I
*

*>>>> have few doubts. Kindly reply me.
*

*>>>>
*

*>>>> I need to choose all 5 sources randomly with equal probability
*

*>>>> i.e as
*

*>>>> if detector are exposed by all 5 sources simultaneously.
*

*>>>>
*

*>>>> Since I am using 64 bit computer,
*

*>>>> can I use REAL*8 instead of REAL*4
*

*>>>> CENTERS(5) and below that declared centers values as DATA
*

*>>>> CENTERS/-10.,-5.,0.,5.,10./
*

*>>>>
*

*>>>> Then use X0 = CENTERS(FLOOR(6*FLRNDM(XDUMMY)))
*

*>>>> here FLOOR(6*FLRNDM(XDUMMY) will produce integer number
*

*>>>> 0,1,2,3,4,5,6
*

*>>>> I am not getting how it will produce -5 and -10 and 10
*

*>>>> co-ordinates ?
*

*>>>> and why FLRNDM(XDUMMY) is multiplied by 6 only.
*

*>>>>
*

*>>>> Thanking you in advance
*

*>>>>
*

*>>>> __________________________________________________________________________
*

*>>>> You can manage unsubscription from this mailing list at
*

*>>>> https://www.fluka.org/fluka.php?id=acc_info
*

*>>>>
*

*>>>>
*

*>>
*

*>>
*

*>> Dear FLUKA experts,
*

*>>
*

*>> As discussed earlier, I am trying to model 5 spherical source
*

*>> using source.f card but not able to compile it.
*

*>>
*

*>> During compilation, it is giving following error
*

*>>
*

*>>
*

*>> tarted 2018.04.23 18:19:50
*

*>>>>> Compiling: /home/arghya/fluka/flutil/fff -b -N multi.f
*

*>> multi.f:204:24:
*

*>>
*

*>> DIMENSION CENTERS(5)
*

*>> 1
*

*>> Error: Invalid character in name at (1)
*

*>> Ended: 2018.04.23 18:19:50
*

*>>
*

*>> Error compiling
*

*>> Error: compiling file: multi.f
*

*>> No object generated
*

*>>
*

*>>
*

*>>
*

*>> Please find attached source.f card also.
*

*>>
*

*>> Kindly suggest me some solutions.
*

*>>
*

*>> Thanking you in advance.
*

*>>
*

*>> with regards
*

*>> ArghyaC
*

__________________________________________________________________________

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Received on Wed May 02 2018 - 14:23:39 CEST

Date: Fri, 27 Apr 2018 17:09:14 +0530

Thank you very much. Now it is working fine.

On 2018-04-23 19:02, Giuseppe Battistoni wrote:

__________________________________________________________________________

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Received on Wed May 02 2018 - 14:23:39 CEST

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