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

From: Tom Jonas Janzen (tom.jonas.janzen_at_hs-furtwangen.de) <tom.jonas.janzen_at_hs-furtwangen.de>
Date: Sun, 14 May 2017 11:46:17 +0200 (CEST)

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
9424777.964712388.9813823.0076314.159265314.159265314.159265314.159265
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 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

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Received on Sun May 14 2017 - 13:14:53 CEST

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