[Gate-users] Fw: Help on Varying Tube current(mAs) using Spekcalc Spectrum

[Emmanuel Marfo]

________________________________
From: Emmanuel Marfo
Sent: Monday, 24 July 2017 4:13 p.m.
To: Simon Rit
Subject: Re: [Gate-users] Help on Varying Tube current(mAs) using Spekcalc Spectrum


Dear Sir,

Please, From what you said I understand the number of particles to be Histories in my simulation and I also know 1mAs =6.25*10^15 electrons which are probably a number of particles for 1mAs.

The number of particles = Histories. however, I know increasing the number of histories decreases the statistical uncertainty in the simulation. This is where I get confused. Please, Sir  I really need help on this part. Is there any article or simple illustration that can guide me. Thanks.

Best regards,

Emmanuel Marfo

Student

________________________________
From: simon.rit at gmail.com <simon.rit at gmail.com> on behalf of Simon Rit <simon.rit at creatis.insa-lyon.fr>
Sent: Monday, 10 July 2017 6:50:49 a.m.
To: Emmanuel Marfo
Cc: gate-users at lists.opengatecollaboration.org
Subject: Re: [Gate-users] Help on Varying Tube current(mAs) using Spekcalc Spectrum

Hi,
The mAs is adjusted by setting the number of particles in your Gate simulation. SpekCalc provides a spectrum in number of photons per kev per cm2 per mAs @ 1 meter. So depending on your geometry, you can deduce a corresponding number of particles to simulate in Gate.
Simon

On Sat, Jul 8, 2017 at 10:54 AM, Emmanuel Marfo <emmanuel.marfo at postgrad.otago.ac.nz<mailto:emmanuel.marfo at postgrad.otago.ac.nz>> wrote:

Dear Gate-Users,

Please, does anyone has an idea how I could adjust tube current(mAs) in GATE using Spekcalc energy spectrum as the source. Any help will be deeply appreciated. Thanks.

Cheers,

Emmanuel Marfo

University of Otago

Student

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