AW: [fluka-discuss]: scoring neutron fluence & thermal neutrons

From: Tom Jonas Janzen <tom.jonas.janzen_at_hs-furtwangen.de>
Date: Mon, 15 May 2017 13:04:12 +0200

Dear Francesco,

first of all, i want to thank you for your help with my problem. I already
could fix the previous error with your given tipps on my input file.

I used the 16O Oxygen variant because my topic of the Master Thesis is a
follow up concept of another srtudents Master Thesis. My supervising
Professor gave me his Input files so i could better understand the function
of the LOW-MAT and MATERIAL cards. Therefore, i used his pattern as help.
The student before me used this 16O Oxygen pattern for his simulation with
PMMA so i thought it would also be good to use it too.

The problem is, that currently an other error occured during the first test
run after my adjustments ...
Right now the error file says the following:

*** (n,p) proton production activated for Xsec mat. # 1 ***
  **** Low energy neutron xsec not found for some media 2
5 ****
 HYDROGEN
 CARBON
 OXYGEN

I can see, that the error written above must occure from the MATERIAL or
LOW-MAT cards, but i don't know how to fix the error...
Do you have any idea what is the problem ?
 
I have written down the now changed INPUT file below.
Thank you very much for your help and your time effort.

Best regards,
Tom Janzen

Changed INPUT file:
04_Testsimulation_PMMA
* Set the defaults for precision simulations
DEFAULTS
NEUTRONS
* Define the beam characteristics
BEAM -0.003 10000.0
1.0NEUTRON
BEAMPOS 0.0 0.0 -5.0
GEOBEGIN
COMBNAME
    3 0
RCC blkbody 0.0 0.0 -100.0 0.0 0.0 200. 150.
RCC void 0.0 0.0 -75.0 0.0 0.0 150.0 100.0
RCC air 0.0 0.0 -10.0 0.0 0.0 20.0 15.0
RCC PMMA 0.0 0.0 -5.0 0.0 0.0 1.0 10.0
RCC PMMA2 0.0 0.0 -4.0 0.0 0.0 1.0 10.0
RCC PMMA3 0.0 0.0 -3.0 0.0 0.0 1.0 10.0
RCC PMMA4 0.0 0.0 -2.0 0.0 0.0 1.0 10.0
RCC PMMA5 0.0 0.0 -1.0 0.0 0.0 1.0 10.0
RCC PMMA6 0.0 0.0 0.0 0.0 0.0 1.0 10.0
RCC PMMA7 0.0 0.0 1.0 0.0 0.0 1.0 10.0
RCC PMMA8 0.0 0.0 2.0 0.0 0.0 1.0 10.0
RCC PMMA9 0.0 0.0 3.0 0.0 0.0 1.0 10.0
RCC PMMA10 0.0 0.0 4.0 0.0 0.0 1.0 10.0
END
* Black hole
BLKBODY 5 +blkbody -void
* Void around
VOID 5 +void-air
AIR 5 +air -PMMA -PMMA2 -PMMA3 -PMMA4 -PMMA5 -PMMA6 -PMMA7-PMMA8
-PMMA9 -PMMA10
PMMA 5 +PMMA
PMMA2 5 +PMMA2
PMMA3 5 +PMMA3
PMMA4 5 +PMMA4
PMMA5 5 +PMMA5
PMMA6 5 +PMMA6
PMMA7 5 +PMMA7
PMMA8 5 +PMMA8
PMMA9 5 +PMMA9
PMMA10 5 +PMMA10
END
9424777.964712388.9813823.0076314.159265314.159265314.159265314.159265
314.159265314.159265314.159265314.159265314.159265314.159265
GEOEND
* Polymethyl Methacrylate PMMA Photoresist
* H
* Chemical H H-C-H
* Formula | |
* Polymethyl ----- C - C -----
* Methacrylate | | H
* H C - O - C-H
* C H O || H
* 5 8 2 O
*
* atomic density calculated:
* H-1
* H-2
* C
* O-16
MATERIAL 1.19 PMMA
COMPOUND 0.5332533 HYDROGEN 0.3333333 CARBON 0.1333333 OXYGENPMMA
MATERIAL 1. 8.99E-05
0.0HYDROGEN
LOW-MAT HYDROGEN 1. 11. 296.
HYDROGEN
MATERIAL 6. 2.26 0.0CARBON

LOW-MAT CARBON 6. -2. 293. CARBON

MATERIAL 8. 0.001333 0.0OXYGEN

LOW-MAT OXYGEN 8. 16. 293. OXYGEN

* ..+....1....+....2....+....3....+....4....+....5....+....6....+....7..
ASSIGNMA BLCKHOLE BLKBODY
ASSIGNMA VACUUM VOID
ASSIGNMA AIR AIR
ASSIGNMA PMMA PMMA
ASSIGNMA PMMA PMMA2
ASSIGNMA PMMA PMMA3
ASSIGNMA PMMA PMMA4
ASSIGNMA PMMA PMMA5
ASSIGNMA PMMA PMMA6
ASSIGNMA PMMA PMMA7
ASSIGNMA PMMA PMMA8
ASSIGNMA PMMA PMMA9
ASSIGNMA PMMA PMMA10
USRTRACK 1. NEUTRON -50. PMMA314.159265
10.detect1
USRTRACK 1E-11 3E-12 &
USRTRACK 1. NEUTRON -50. PMMA314.159265
10.detect2
USRTRACK 3E-11 1E-11 &
USRTRACK 1. NEUTRON -50. PMMA314.159265
10.detect3
USRTRACK 1E-10 3E-11 &
USRTRACK 1. NEUTRON -50. PMMA314.159265
10.detect4
USRTRACK 3E-10 1E-10 &
USRTRACK 1. NEUTRON -50. PMMA314.159265
10.detect5
USRTRACK 1E-9 3E-10 &
USRTRACK 1. NEUTRON -50. PMMA314.159265
10.detect6
USRTRACK 3E-9 1E-9 &
USRTRACK 1. NEUTRON -50. PMMA314.159265
10.detect7
USRTRACK 1E-8 3E-9 &
USRTRACK 1. NEUTRON -50. PMMA314.159265
10.detect8
USRTRACK 3E-8 1E-8 &
USRTRACK 1. NEUTRON -50. PMMA314.159265
10.detect9
USRTRACK 1E-7 3E-8 &
USRTRACK 1. NEUTRON -50. PMMA314.159265
10.detect10
USRTRACK 3E-7 1E-7 &
USRTRACK 1. NEUTRON -50. PMMA314.159265
10.detect11
USRTRACK 1E-6 3E-7 &
USRTRACK 1. NEUTRON -50. PMMA314.159265
10.detect12
USRTRACK 3E-6 1E-6 &
USRTRACK 1. NEUTRON -50. PMMA314.159265
10.detect13
USRTRACK 1E-5 3E-6 &
USRTRACK 1. NEUTRON -50. PMMA314.159265
10.detect14
USRTRACK 3E-5 1E-5 &
USRTRACK 1. NEUTRON -50. PMMA314.159265
10.detect15
USRTRACK 1E-4 3E-5 &
USRTRACK 1. NEUTRON -50. PMMA314.159265
10.detect16
USRTRACK 3E-4 1E-4 &
USRTRACK 1. NEUTRON -50. PMMA314.159265
10.detect17
USRTRACK 1E-3 3E-4 &
USRTRACK 1. NEUTRON -50. PMMA314.159265
10.detect18
USRTRACK 3E-3 1E-3 &
USRTRACK 1. NEUTRON -50. PMMA314.159265
10.detect19
USRTRACK 1E-2 3E-3 &
USRTRACK 1. NEUTRON -50. PMMA314.159265
10.detect20
USRTRACK 1E-2 1E-11 &
* Set the random number seed
RANDOMIZ 1.0
* Set the number of primary histories to be simulated in the run
START 1000000.
STOP



-----Ursprüngliche Nachricht-----
Von: owner-fluka-discuss_at_mi.infn.it [mailto:owner-fluka-discuss_at_mi.infn.it]
Im Auftrag von Francesco Cerutti
Gesendet: Montag, 15. Mai 2017 10:03
An: Tom Jonas Janzen (tom.jonas.janzen_at_hs-furtwangen.de)
<tom.jonas.janzen_at_hs-furtwangen.de>
Cc: FLUKA discussion <fluka-discuss_at_fluka.org>
Betreff: Re: [fluka-discuss]: scoring neutron fluence & thermal neutrons


> Then, have you any reason to select 16O only instead of natural oxygen
> composition? It's what you are doing with the 16. in the respective
> MATERIAL card.

well, since yours is a pure low energy neutron problem and the respective
oxygen cross section set refers indeed to 16O, your monoisotopic material
definition embeds in fact some coherence. In practice, the isotopic
composition input choice is irrelevant, since low energy neutron transport
will be perfomed with respect to 16O only.

Regards
Francesco

**************************************************
Francesco Cerutti
CERN-EN/STI
CH-1211 Geneva 23
Switzerland
tel. ++41 22 7678962
fax ++41 22 7668854

On Sun, 14 May 2017, Francesco Cerutti wrote:

>
> Dear Tom,
>
> the problem is due to the presence of the word "compound" in your
> LOW-MAT card. It's a character string totally unexpected and meaningless.
> By the way, why are you asking for the obsolete 72-group neutron
> library, which had a single thermal group and acutally is no longer
> distributed? Just remove your LOW-NEUT card (this way you will
> automatically use the current 260-group library).
> Remove also the material index (WHAT(4)) from all MATERIAL cards, it's
> useless and potentially dangerous.
> Remove the AUXSCORE card that is pointless (in USRTRACK you are
> scoring neutron fluence, so further filtering on NEUTRON makes no sense).
> Then, have you any reason to select 16O only instead of natural oxygen
> composition? It's what you are doing with the 16. in the respective
> MATERIAL card.
>
> Best wishes
>
> Francesco
>
> **************************************************
> Francesco Cerutti
> CERN-EN/STI
> CH-1211 Geneva 23
> Switzerland
> tel. ++41 22 7678962
> fax ++41 22 7668854
>
> On Sun, 14 May 2017, Tom Jonas Janzen
> (tom.jonas.janzen_at_hs-furtwangen.de)
> wrote:
>
>> Hello the Fluka community!
>>  
>> My name is Tom Janzen and i'm currently working with FLUKA for my
>> Master Thesis at the Hochschule Furtwangen.
>>
>> My work experience with Fluka is scaled on an intermediate leval but
>> i have a problem where i need some help of the community.
>> For my master Thesis im need to score the Neutron Fluence of a
>> isotropic beam in ten bodys of PMMA with the USRTRCK Card. Also i
>> need to track the neutron fluence in the energy spectrum from 3E-12 GeV
to 1E-2 GeV.
>>
>> The aim of this analysis should be results of the USRTRCK, which i
>> can transform in a diagram, where i can visualize the Neutron
>> Fluence in every PMMA Body at the Energy Range of 3E-12 GeV to 1E-2
>> GeV. This means, that i am trying to track thermal neutrons and
>> visualize the moderation of neutrons in the PMMA (moderator
>> material).
>>  
>> Right know i have a Input file which is looking fine to me. I am
>> working with the Cards which should track the low energy neutrons
>> and the thermal Neutrons as well. Also i took care of the Material
>> cards and implemented in my Input file the LOW-MAT card in the way
>> the manual refers to. But when i am trying to run the simulation, i
>> get an Error with the following text:
>>   *** The 5th field   compound of the following input card ***
>>  LOW-MAT     HYDROGEN        1.       31.      293.  compound
>> HYDROG-1
>>   *** does not contain a valid formatted fortran real number    ***
>>   *** when one is expected ***
>> I tryed to fix it by my own beut i have no clue...
>>
>> I Hope the FLUKA users and experts can help me with this little problem.
>> Thank you very much for your help and your time effort. The used
>> Input file is written down below.
>>  
>> Best regards,
>> Tom Janzen
>>  
>> My Input File:
>> 04_Testsimulation_PMMA
>> * Set the defaults for precision simulations DEFAULTS NEUTRONS
>> * Define the beam characteristics
>> BEAM          -0.003             10000.0 1.0NEUTRON BEAMPOS         
>> 0.0       0.0      -5.0 GEOBEGIN COMBNAME
>>     3    0
>> RCC blkbody    0.0 0.0 -100.0 0.0 0.0 200. 150.
>> RCC void       0.0 0.0 -75.0 0.0 0.0 150.0 100.0 RCC air        0.0
>> 0.0 -10.0 0.0 0.0 20.0 15.0 RCC PMMA       0.0 0.0 -5.0 0.0 0.0 1.0
>> 10.0 RCC PMMA2      0.0 0.0 -4.0 0.0 0.0 1.0 10.0 RCC PMMA3     
>> 0.0 0.0 -3.0 0.0 0.0 1.0 10.0 RCC PMMA4      0.0 0.0 -2.0 0.0 0.0
>> 1.0 10.0 RCC PMMA5      0.0 0.0 -1.0 0.0 0.0 1.0 10.0 RCC PMMA6     
>> 0.0 0.0 0.0 0.0 0.0 1.0 10.0 RCC PMMA7      0.0 0.0 1.0 0.0 0.0 1.0
>> 10.0 RCC PMMA8      0.0 0.0 2.0 0.0 0.0 1.0 10.0 RCC PMMA9      0.0
>> 0.0 3.0 0.0 0.0 1.0 10.0 RCC PMMA10     0.0 0.0 4.0 0.0 0.0 1.0 10.0
>> END
>> * Black hole
>> BLKBODY      5 +blkbody -void
>> * Void around
>> VOID         5 +void-air
>> AIR          5 +air -PMMA -PMMA2 -PMMA3 -PMMA4 -PMMA5 -PMMA6
>> -PMMA7-PMMA8
>> -PMMA9 -PMMA10
>> PMMA         5 +PMMA
>> PMMA2        5 +PMMA2
>> PMMA3        5 +PMMA3
>> PMMA4        5 +PMMA4
>> PMMA5        5 +PMMA5
>> PMMA6        5 +PMMA6
>> PMMA7        5 +PMMA7
>> PMMA8        5 +PMMA8
>> PMMA9        5 +PMMA9
>> PMMA10       5 +PMMA10
>> END
>>
>> 9424777.964712388.9813823.0076314.159265314.159265314.159265314.15926
>> 5
>> 314.159265314.159265314.159265314.159265314.159265314.159265
>> GEOEND
>> * Polymethyl Methacrylate PMMA Photoresist
>> * H
>> * Chemical                        H H-C-H
>> * Formula                         |   |
>> * Polymethyl                ----- C - C -----
>> * Methacrylate                    |   |       H
>> *                                 H   C - O - C-H
>> *  C  H  O                            ||      H
>> *   5  8  2                           O
>> *
>> * atomic density calculated:
>> * H-1
>> * H-2
>> * C
>> * O-16
>> MATERIAL                            1.19                             
>> PMMA COMPOUND   0.5332533  HYDROGEN 0.3333333    CARBON 0.1333333   
>> OXYGENPMMA MATERIAL          1.            8.99E-05        3.
>> 0.0HYDROGEN
>> LOW-MAT     HYDROGEN        1.       31.      293.  compound
>> HYDROG-1
>> MATERIAL          6.                2.26        6. 0.0CARBON
>> LOW-MAT       CARBON        6.       -2.      293.  compound CARBON
>> MATERIAL          8.            0.001333        8.
>> 16.OXYGEN
>> LOW-MAT       OXYGEN        8.       16.      293. OXYGEN
LOW-NEUT        
>> 72.       22.    0.0196        1.                  1.
>> *LOW-BIAS         20.       73.      0.95      PMMA      PMMA        1.
>> *SCORE        NEUTRON  THNEU-EQ
>> * ..+....1....+....2....+....3....+....4....+....5....+....6....+....7..
>> ASSIGNMA    BLCKHOLE   BLKBODY
>> ASSIGNMA      VACUUM      VOID
>> ASSIGNMA         AIR       AIR
>> ASSIGNMA        PMMA      PMMA
>> ASSIGNMA        PMMA     PMMA2
>> ASSIGNMA        PMMA     PMMA3
>> ASSIGNMA        PMMA     PMMA4
>> ASSIGNMA        PMMA     PMMA5
>> ASSIGNMA        PMMA     PMMA6
>> ASSIGNMA        PMMA     PMMA7
>> ASSIGNMA        PMMA     PMMA8
>> ASSIGNMA        PMMA     PMMA9
>> ASSIGNMA        PMMA    PMMA10
>> AUXSCORE    USRTRACK   NEUTRON             detect1  detect20
>> AMB74
>> USRTRACK          1.   NEUTRON      -50.      PMMA314.159265
>> 10.detect1
>> USRTRACK       1E-11     3E-12                                        
>> & USRTRACK          1.   NEUTRON      -50.      PMMA314.159265
>> 10.detect2
>> USRTRACK       3E-11     1E-11                                        
>> & USRTRACK          1.   NEUTRON      -50.      PMMA314.159265
>> 10.detect3
>> USRTRACK       1E-10     3E-11                                        
>> & USRTRACK          1.   NEUTRON      -50.      PMMA314.159265
>> 10.detect4
>> USRTRACK       3E-10     1E-10                                        
>> & USRTRACK          1.   NEUTRON      -50.      PMMA314.159265
>> 10.detect5
>> USRTRACK        1E-9     3E-10                                        
>> & USRTRACK          1.   NEUTRON      -50.      PMMA314.159265
>> 10.detect6
>> USRTRACK        3E-9      1E-9                                        
>> & USRTRACK          1.   NEUTRON      -50.      PMMA314.159265
>> 10.detect7
>> USRTRACK        1E-8      3E-9                                        
>> & USRTRACK          1.   NEUTRON      -50.      PMMA314.159265
>> 10.detect8
>> USRTRACK        3E-8      1E-8                                        
>> & USRTRACK          1.   NEUTRON      -50.      PMMA314.159265
>> 10.detect9
>> USRTRACK        1E-7      3E-8                                        
>> & USRTRACK          1.   NEUTRON      -50.      PMMA314.159265
>> 10.detect10
>> USRTRACK        3E-7      1E-7                                        
>> & USRTRACK          1.   NEUTRON      -50.      PMMA314.159265
>> 10.detect11
>> USRTRACK        1E-6      3E-7                                        
>> & USRTRACK          1.   NEUTRON      -50.      PMMA314.159265
>> 10.detect12
>> USRTRACK        3E-6      1E-6                                        
>> & USRTRACK          1.   NEUTRON      -50.      PMMA314.159265
>> 10.detect13
>> USRTRACK        1E-5      3E-6                                        
>> & USRTRACK          1.   NEUTRON      -50.      PMMA314.159265
>> 10.detect14
>> USRTRACK        3E-5      1E-5                                        
>> & USRTRACK          1.   NEUTRON      -50.      PMMA314.159265
>> 10.detect15
>> USRTRACK        1E-4      3E-5                                        
>> & USRTRACK          1.   NEUTRON      -50.      PMMA314.159265
>> 10.detect16
>> USRTRACK        3E-4      1E-4                                        
>> & USRTRACK          1.   NEUTRON      -50.      PMMA314.159265
>> 10.detect17
>> USRTRACK        1E-3      3E-4                                        
>> & USRTRACK          1.   NEUTRON      -50.      PMMA314.159265
>> 10.detect18
>> USRTRACK        3E-3      1E-3                                        
>> & USRTRACK          1.   NEUTRON      -50.      PMMA314.159265
>> 10.detect19
>> USRTRACK        1E-2      3E-3                                        
>> & USRTRACK          1.   NEUTRON      -50.      PMMA314.159265
>> 10.detect20
>> USRTRACK        1E-2     1E-11                                        
>> &
>> * Neutron fluence scoring
>> AUXSCORE    USRTRACK   NEUTRON             detect1  detect20
>> AMB74
>> USRBIN           10.   NEUTRON      -70.      100.      100.
>> 100.Neu-Flu USRBIN         -100.     -100.     -100.      200.     
>> 200.      240. &
>> * Set the random number seed
>> RANDOMIZ         1.0
>> * Set the number of primary histories to be simulated in the run
>> START       1000000.
>> STOP
>>
>>
>

__________________________________________________________________________
You can manage unsubscription from this mailing list at https://www.fluka.org/fluka.php?id¬c_info
Received on Mon May 15 2017 - 14:29:24 CEST

This archive was generated by hypermail 2.3.0 : Mon May 15 2017 - 14:29:31 CEST