[Gate-users] Maximum Particle Number

[Svetlana Shasharina]

Dear Tom,

I think you will need independent simulations with different random seeds.

Best,

Svetlana

On 1/29/20 7:05 AM, Russ, Tom wrote:
> Dear Dimitris,
>
> thank you very much for your help!
> Unfortunately, I think this might not be possible in my case.
> I want to simulate CT projections and use a general particle source (GPS) where I directly have to give it the number of primaries.
> Besides I also think I cannot substitute the GPS with an activity source because I am using Gatelab, which (as I understood it) necessitates the use of the command 'setTotalNumberOfPrimaries'.
>
> Best regards,
> Tom
>
> -----Ursprüngliche Nachricht-----
> Von: Dimitrios Thanasas <dthanas at uoa.gr>
> Gesendet: Mittwoch, 29. Januar 2020 14:21
> An: Russ, Tom <Tom.Russ at medma.uni-heidelberg.de>
> Cc: gate-users at lists.opengatecollaboration.org
> Betreff: Re: [Gate-users] Maximum Particle Number
>
> Dear Tom,
>
> I had this problem too. I solved it by combining time and source activity.
> If you want 3600000000 particles you can use 100 ΜΒq activity for 36 seconds (or any other combination).
> Comment the line (you don't need it):
> #/gate/application/setTotalNumberOfPrimaries 3600000000 to run the simulation.
>
> Best Regards,
> Dimitris
>
>> Dear Gate-Community,
>>
>> Gate seems to have a problem with primary particle numbers over
>> exactly
>> 2.147.483.648 (2^(32)/2) and simply throws an error ('Exiting with
>> return value 6') and stops simulating for me.
>> Can this be due to Gate having problems with numbers outside the
>> 32bit-variable range?
>> Did anybody else encounter this?
>> This is how my code looks:
>>
>> '/gate/application/setTotalNumberOfPrimaries 3600000000
>> /gate/application/setTimeSlice 1 s /gate/application/setTimeStart 0 s
>> /gate/application/setTimeStop 90 s'
>>
>> I use this acquisition timing due to the rotation of a voxelized phantom.
>>
>> Any help will be much appreciated! :)
>>
>> Best regards,
>> Tom
>>
>>
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>
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