Dear Shy
When you score by region you have to divide by the volume to get either
energy deposited pr cm3 or the correct dose value. This can be done either
offline (when processing the output) or by defining a volume in the
geometry. Hard to tell why the latter didn't work for you without seeing
the input. In any case I suggest doing the former.
Cheers
Stefan
On Thu, 11 May 2017, shihy_at_ihep.ac.cn wrote:
> Dear Anton,
>
> I've tried to used USRBIN card with region scoring to score energy
> deposition(ENERGY), but I'd like to know how "per cm3" were calculated? I tried
> to set the real volume of the scoring part in geometry card(e.g., 100 cm3), or
> simply put it 1.0 as default , two ways gave the same scoring number. Which is
> the real answer? Or if I use region scoring, I only get the total energy
> deposited in this region, and have to change it to per cm3 manually? How about
> it in Dose Scoring?
>
> Thanks a lot!
>
> Shy
>
> From: Anton Lechner
> Date: 2017-04-28 13:58
> To: Sujoy Chatterjee; shihy_at_ihep.ac.cn
> CC: Fluka Discussion list
> Subject: RE: [fluka-discuss]: How to score energy depisition in an
> irregular body?
> Dear Shy Shi,
>
> You have to consider the fundamental difference between energy deposited
> in a material and particle fluence (there is also a distinct difference in
> units (volume vs area)):
>
> * USTRACK gives you the differential particle fluence inside a region
> (calculated as track-length fluence, i.e. the length of particle tracks
> divided by the region volume if the volume has been specified on WHAT(5)).
> This is however NOT the energy deposition in the region (neither can it be
> converted to energy deposition).
>
> * USRBIN can be used to calculate many different quantities, including
> energy deposition (WHAT(2)=ENERGY), dose (WHAT(2)=DOSE) or fluence
> (WHAT(2)=e.g. a particle name to score fluence for this particle). Note
> that the latter is not differential in energy like for USRTRACK. USRBIN
> allows you to adopt a specific spatial mesh, but also to score per region.
>
> In your case, if you are interested in energy deposition, you have to use
> USRBIN. If it is sufficient for you to calculate the total energy
> deposition in the regions (of arbitrary shape), then you can use
> following scoring. It calculates the energy deposition per region per
> lattice. Note that, contrary to USRBIN scorings with a regular spatial
> mesh, the results will simply be GeV per region (not weighted with
> volumes):
>
> USRBIN 8.0 ENERGY -21.0 _at_LASTREG 400.0
> 10000.0EnDep
> USRBIN 1.0 0.0 -10000.0 1.0 1.0 1.0 &
>
> Finally, the difference between energy deposition (ENERGY) and dose
> scoring (DOSE) is simply that in the latter case the energy deposition in
> a volume has been divided by the mass of the material in that volume.
> Hence also the different units GeV/cm3 and GeV/g.
>
> Cheers, Anton
>
>
> ________________________________________
> From: owner-fluka-discuss_at_mi.infn.it [owner-fluka-discuss_at_mi.infn.it] on
> behalf of Sujoy Chatterjee [sujoy_at_vecc.gov.in]
> Sent: 28 April 2017 07:01
> To: shihy_at_ihep.ac.cn
> Cc: Fluka Discussion list
> Subject: Re: [fluka-discuss]: How to score energy depisition in an
> irregular body?
>
> Dear ShyShi,
> For irregular body you can use region based scoring as available with
> FLUKA. In case of energy deposition the unit is GeV. For dose, it is
> normalized per unit mass of the region and the unit is GeV/g.
>
> with regards,
> ????? ??????/SujoyChatterjee
> ???? ?????? ???????? ??????/Bhabha Atomic Research Centre
> 1/? ??????? ???/1/AF-Bidhannagar,
> ??????? - 700064/Kolkata - 700064
> ????/Ph:+91-33-23184343
> ?????/Fax:+91-33-23346871
>
> -----owner-fluka-discuss_at_mi.infn.it wrote: -----
> To: fluka-discuss <fluka-discuss_at_fluka.org>
> From: "shihy_at_ihep.ac.cn"
> Sent by: owner-fluka-discuss_at_mi.infn.it
> Date: 04/28/2017 10:19AM
> Subject: [fluka-discuss]: How to score energy depisition in an irregular
> body?
>
> Dear Experts,
>
> I need to scoring the energy deposition and doseeq in an irregular body.
> It was difficult to use USRBIN card to do this. I tried to use USRTRACK
> card to score "ENERGY", but it gave a number in the unit of "GeV/cm2", how
> to transfer it to the unit "GeV/g"? Or is there a better way to do this?
>
> BTW, what's the difference between "ENERGY" and "DOSE" in scoring?
>
> Thanks a lot.
>
> Shy Shi
>
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>
>
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Received on Thu May 11 2017 - 05:44:43 CEST