[Gate-users] SpekCalc vs GATE x-ray energy spectrum

[Emmanuel Marfo]

Please, in my simulation. I modelled the anode(rectangular geometry with thickness 1mm and cathode(source type: plane and shape: circle, source energy: monoenergetic electron(120keV)), filters(aluminium and copper), all according to the specification of our x-ray manual. I was able to generate an x-ray energy spectrum from this setup. I used both Penelope and emstandard_opt3 which apparently gives similar results.


Secondly, I used the same parameters in SpekCalc program. A program for calculating x-ray energy spectrum. I, therefore, compared the two spectra as a way of validating my spectrum from GATE. This gives the results of the image attached. If you need more info please let me know. Thanks

________________________________
From: simon.rit at gmail.com <simon.rit at gmail.com> on behalf of Simon Rit <simon.rit at creatis.insa-lyon.fr>
Sent: Wednesday, 11 October 2017 7:38:45 p.m.
To: Emmanuel Marfo
Cc: gate-users at lists.opengatecollaboration.org
Subject: Re: [Gate-users] SpekCalc vs GATE x-ray energy spectrum

Hi,
I am not sure I understand what we are looking at. What was the x-ray source in your Gate simulation? I think it would help to have the full simulation.
Best regards,
Simon

On Wed, Oct 11, 2017 at 3:47 AM, Emmanuel Marfo <emmanuel.marfo at postgrad.otago.ac.nz<mailto:emmanuel.marfo at postgrad.otago.ac.nz>> wrote:

Hi GATE users,

Find attached file 'SpekCalc vs GATE x-ray energy spectrum' which compares the two spectrums. My problem is the  GATE characteristics spectrum is shifted to the right a bit when compared to the characteristics energy spectrum from SpekCalc. Please, I want to know how I can make it align with that of spekcalc. I used the energyspectrum actor definition below

### E N E R G Y S P E C T R U M ######
######################################
/gate/actor/addActor             EnergySpectrumActor espectrum
/gate/actor/espectrum/attachTo   phantom
/gate/actor/espectrum/save     Desktop/PHDthesisGATE/MARFO2017/ModellingX-raytube/XraytubeCU/output/cylinderespectrum.root
/gate/actor/espectrum/addFilter particleFilter
/gate/actor/espectrum/particleFilter/addParticle gamma
/gate/actor/espectrum/energySpectrum/setEmin           0 eV
/gate/actor/espectrum/energySpectrum/setEmax           0.12 MeV
/gate/actor/espectrum/energySpectrum/setNumberOfBins   120
/gate/actor/espectrum/energyLossHisto/setEmin          0 eV
/gate/actor/espectrum/energyLossHisto/setEmax          0.12 MeV
/gate/actor/espectrum/energyLossHisto/setNumberOfBins  120

Thanks

Best regards,

Emmanuel Marfo

University of Otago

Student

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