[Gate-users] Can't run with 100 million particles

[Amy Meldrum]

Can anyone point me towards any of the reference papers that were mentioned
in this thread? I think they will be useful for me in the near future when
I defend my Master's thesis.

Thanks,

Amy

On Wed, Oct 15, 2014 at 6:40 AM, Grevillot Loic <
loic.grevillot at medaustron.at> wrote:

>  Of course not!
>
> If you buy 2 times 10 apples or 1 time 20 apples you get in both cases 20
> apples.
>
> Reference to papers used for uncertainty calculations are available –
> please look at Gate reference papers!
>
> Please use the list, other people may benefit of discussion and my
> contributions are on free time which is very limited at the moment…
>
>
>
> Kind regards,
>
>
>
> Loïc Grevillot
>
>
>
>
>
>
>
> *From:* S. Saghamanesh [mailto:s.saghamanesh at yahoo.com]
> *Sent:* Mittwoch, 15. Oktober 2014 12:34
> *To:* Grevillot Loic
> *Subject:* Re: [Gate-users] Can't run with 100 million particles
>
>
>
>
>
> Thanks for your note. However, due to the linear operation of this
> addition, I'll have a greater uncertainty!
>
> For example, I have two simulations with uncertainties of sigma1 = 0.7
> (70%) and sigma2 = 0.6 (60%). After the addition, I'll have the total
> uncertainty of sqrt(sigma1^2 + sigma2^2) = 0.92 (92%).
>
> So I wanted to reduce my uncertainty by increasing my statistics (through
> several simulations), but ultimately I'd obtain a greater uncertainty. Am I
> right on this?
>
>
>
> Best
>
> Soman
>
>
>
> On Monday, October 13, 2014 8:41 AM, Grevillot Loic <
> loic.grevillot at medaustron.at> wrote:
>
>
>
> You can manually run 10 different simulations. Make sure to change output
> names for each simu and then make a simple addition.
>
>
>
> Sincerely,
>
>
>
> Loïc
>
>
>
>
>
>
>
> *From:* S. Saghamanesh [mailto:s.saghamanesh at yahoo.com
> <s.saghamanesh at yahoo.com>]
> *Sent:* Samstag, 11. Oktober 2014 13:53
> *To:* Grevillot Loic; gate-users at lists.opengatecollaboration.org
> *Subject:* Re: [Gate-users] Can't run with 100 million particles
>
>
>
> Dear Loïc,
>
>
>
> I've tried to run my main macro file through the following command:
>
>  "/control/loop myMain.mac mycounter 1 10 10"
>
> which is supposed to run 10 simulations with 10 million particles with
> different seeds (by /gate/random/setEngineSeed auto). But It runs only
> the first 10 million particles and doesn't keep run the remains.
>
> Do you have any idea what's wrong with this command? I guess it's the only
> way I can proceed with 100 million primaries without getting error.
>
>
>
> Best regards
>
> Soman
>
>
>
> On Friday, October 3, 2014 9:10 AM, Grevillot Loic <
> loic.grevillot at medaustron.at> wrote:
>
>
>
> Dear Soman,
>
>
>
> You said you need to run 100 million primaries and artifacts appear after
> 10 million.
>
> My suggestion is therefore to run 10 simulations of 10 million particles
> (fully equivalent to a single simu of 100 million). You just have to make
> sure the seeds are different for every simulation, which can be easily
> achieved using the following command:
>
> /gate/random/setEngineSeed auto
>
>
>
> Best,
>
> Loïc
>
>
>
> *From:* S. Saghamanesh [mailto:s.saghamanesh at yahoo.com
> <s.saghamanesh at yahoo.com>]
> *Sent:* Freitag, 3. Oktober 2014 07:30
> *To:* Grevillot Loic
> *Subject:* Re: [Gate-users] Can't run with 100 million particles
>
>
>
> Hi,
>
>
>
> Thanks a lot for your note. I use of splitting 1000 for my emitted photons
> but I still have unacceptable uncertainties, so I have to run with 100
> million particles. Do you tell me if I run 10 simulations with 10 million
> particles, it would lessen the uncertainty? I guess it wouldn't, because I
> have uncertain results with a single simulation of 10 million particles.
>
>
>
> Thanks in advance for your help
>
> - Soman
>
>
>
>
>
> On Wednesday, October 1, 2014 3:41 PM, Grevillot Loic <
> loic.grevillot at medaustron.at> wrote:
>
>
>
> Dear Soman,
>
>
>
> We noticed a similar simulation “artifact” when a too high number of
> particles was used. We also noticed that the effect is dependent on the
> particle type and simulation parameters (cut, step size).
>
> We will try correcting the bug for the next release. In the meantime I
> advise you to run 10 simulations of 10 million particles.
>
>
>
> Sincerely,
>
>
>
> Loïc
>
>
>
>
>
>
>
> *From:* gate-users-bounces at lists.opengatecollaboration.org [
> mailto:gate-users-bounces at lists.opengatecollaboration.org
> <gate-users-bounces at lists.opengatecollaboration.org>] *On Behalf Of *S.
> Saghamanesh
> *Sent:* Mittwoch, 1. Oktober 2014 09:29
> *To:* gate-users at lists.opengatecollaboration.org
> *Subject:* [Gate-users] Can't run with 100 million particles
>
>
>
> Hi,
>
>
>
> Is there any limitation on the number of primary particles generated in
> Gate7.0 ? It seems running code with more than 10 million particles leads
> to false results. I need to run my code with 100 millions particles, but
> after checking (with a very simple example), I noticed that no more than 20
> million particles would be generated.
>
>
>
> Thanks for your comments.
>
> - Soman
>
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