Regarding USRBDX + AUXSCORE output for Dose Evaluation

Scoring
1

Dear Fluka Experts,

I’m trying to evaluate the effectiveness of a concrete bunker wall (in a cyclotron installation).
We have gamma and neutron radiation.
To do so I’m using 2 USRBDX card to score the fluxes on the inner and outer surfaces of the bunker, but since we would like to get results in Sv, I added a AUXSCORE card.
Here are the scoring cards for the outer surface

Untitled

My question regards the _sum.lis file that get created after processing the data in flair. Since I’m scoring DOSE-EQ i would expect results in Sv (Sv/pr, Sv/cm2 or something similar) but the header of the sum.lis file reports as follow:

Tot. resp. (Part/cmq/pr) 0.1124358 +/- 0.7339140 %
( → (Part/pr) 0.1124358 +/- 0.7339140 % )

How should i read these results / how to I get it to output in Sv?

(PS: I now you could evaluate the effectiveness in different ways but our professor wants dose results)

3

Dear Simone,

thank you for your question and welcome to the Forum!

Don’t worry about the header which is pre-formatted.
You can interpret the integrated value in the _sum.lis as pSv/primary if you add the correct area for the normalization in the USRBDX card (obviously you have then to multiply by 1e-12 if you need Sv).

As a side note, as said in the FLUKA Manual the WHAT(3) of AUXSCORE (Delta Ray field in Flair) is not used.

Best,
Davide

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4

Dear Davide,

Thank you very much for your answer.

Just to be sure, since the value is in pSv/primary and I want to know the total dose, should I multiply by the number of particles generated by my beam ?
(In my case I have an IRRPROFI of 3600s @ 3.121e14 p/s, so I should multiply the normalized result by 3600 * 3.121e14 * 1e-12 to get Sv/h)

5

Dear Simone,

yes that is correct.
Since you have an irradiation of 3600s the normalization to Sv and to Sv/h is the same.

Best,
Davide

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6

Dear Davide,
Thank you very much for your help.

Best,
Simone

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