[Gate-users] GPS Bremsstrahlung spectra

[Nada Fakhoury]

Thank you, Soman, I was already read this, I was just wondering if  
there was a "shorter" way. But I guess not.. :D

Thank again!

Nada


Quoting "S. Saghamanesh" <s.saghamanesh at yahoo.com>:

> The bremsstrahlung should be specified in the physics section by  
> "/gate/physics/processes/bremsstrahlung/...". But I guess you mean  
> you want to define a continuous spectrum (bremsstrahlung spectrum)  
> for your source. So you can use of a "User" or "Arb" type of gps  
> energy as below:
> /gate/source/mysource/gps/particlegamma
> /gate/source/mysource/gps/energytype User
> /gate/source/mysource/gps/histname energy
> /gate/source/mysource/gps/emin 1.00 keV
> /gate/source/mysource/gps/emax 35.00 keV
> /gate/source/mysource/gps/histpoint 0.001 0.
> /gate/source/mysource/gps/histpoint 0.0015 0.
> /gate/source/mysource/gps/histpoint 0.0020 0.2776
> ...
> /gate/source/Xtube/gps/histpoint0.0350  12960
>
> you should go on with completing all your user-defined spectrum  
> histogram. you can refer to Gate benchmarks or examples (CT  
> benchmark) as well as the Gate user guide (section: defining a  
> source/defining energy type).
> Good luckSoman
>
>      On Wednesday, October 15, 2014 4:26 PM, Nada Fakhoury  
> <nfachour at physics.auth.gr> wrote:
>
>
>
> Dear all,
>
> I am quite new at using Gate, so I have many questions, but I will 
> trouble you today with just the one.
>
> I am trying to simulate a Linac beam, so as a first step I am trying 
> to approach it with the gps commands.
> So I am wondering, does Gate support the bremsstrahlung command?
>
> I tried defining it as
>
> /gate/source/mybeam/gps/particle gamma
> /gate/source/mybeam/gps/ene/type Brem
> /gate/source/mybeam/gps/ene/min 1 eV
> /gate/source/mybeam/gps/ene/max 6 MeV
>
> for starters, but I am getting a repeated error saying
>
> *****EXPMIN=0. Choose different E's or Temp
> *****EXPMAX=0. Choose different E's or Temp
>
>
> I tried defining my source as done in the examples and the RT 
> benchmark, but I get a dose distribution that seems way off... ( 
> https://www.dropbox.com/s/hd6da9lhapn5cju/Screenshot%20from%202014-10-11%2017%3A40%3A14.png?dl=0
> )
>
>
> Thank you in advance,
>
> Nada.
>
>
>
>
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