Re: RE: [fluka-discuss]: How to score energy depisition in an irregular body?

From: Francesco Cerutti <Francesco.Cerutti_at_cern.ch>
Date: Thu, 11 May 2017 06:52:39 +0200

please see

http://www.fluka.org/web_archive/earchive/new-fluka-discuss/10056.html

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

On Thu, 11 May 2017, Stefan Roesler wrote:

> [This sender failed our fraud detection checks and may not be who they appear
> to be. Learn about spoofing at http://aka.ms/LearnAboutSpoofing]
>
> 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 - 09:07:19 CEST

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