<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hi Mounir,<div class=""><br class=""></div><div class="">Thank you very much for reply! </div><div class=""><br class=""></div><div class="">Do you know how is it calculated? </div><div class="">How many events should I simulated to get 1% error?</div><div class=""><br class=""></div><div class="">I got the same large error for the number of hits.</div><div class=""><img apple-inline="yes" id="D5CAB025-FA34-469F-BB90-0BA8706E7C73" src="cid:6941E383-2386-4B36-A6DF-F49353FA2015" class=""></div><div class=""><br class=""></div><div class="">Cheers,</div><div class=""><br class=""></div><div class="">Dmitry <br class="">
<div><br class=""><blockquote type="cite" class=""><div class="">On 11 May 2021, at 18:11, Mounir BENMESSAOUD <<a href="mailto:mounir.benmessaoud@usmba.ac.ma" class="">mounir.benmessaoud@usmba.ac.ma</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class=""> Dose results interpretation (Dmitry Hits),</div><div class="">Dear Dmitry,</div><div class="">the error is large because the number of events is small(10000 events.), you should increase the number of events to decrease the error margin.</div><div class=""><br class=""></div><div class="">good luck,<br class=""></div><div class=""><br class=""></div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Le mar. 11 mai 2021 à 15:31, <<a href="mailto:gate-users-request@lists.opengatecollaboration.org" class="">gate-users-request@lists.opengatecollaboration.org</a>> a écrit :<br class=""></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Send Gate-users mailing list submissions to<br class="">
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1. Dose results interpretation (Dmitry Hits)<br class="">
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Message: 1<br class="">
Date: Tue, 11 May 2021 17:31:11 +0200<br class="">
From: Dmitry Hits <<a href="mailto:dmitry.hits@phys.ethz.ch" target="_blank" class="">dmitry.hits@phys.ethz.ch</a>><br class="">
To: Gate-Users <<a href="mailto:gate-users@lists.opengatecollaboration.org" target="_blank" class="">gate-users@lists.opengatecollaboration.org</a>><br class="">
Subject: [Gate-users] Dose results interpretation<br class="">
Message-ID: <<a href="mailto:6F7EDD9B-F7C1-4E6D-8FA5-1BDF5889B2F1@phys.ethz.ch" target="_blank" class="">6F7EDD9B-F7C1-4E6D-8FA5-1BDF5889B2F1@phys.ethz.ch</a>><br class="">
Content-Type: text/plain; charset="utf-8"<br class="">
<br class="">
Hi Gaters,<br class="">
<br class="">
I am trying to understand results output by the dose actor, which I enabled with the following lines:<br class="">
<br class="">
/gate/actor/addActor DoseActor dose5<br class="">
/gate/actor/dose5/save results/dose_2021May11_171652_5.root<br class="">
/gate/actor/dose5/attachTo box5<br class="">
/gate/actor/dose5/stepHitType random<br class="">
/gate/actor/dose5/setResolution 1 10 1<br class="">
/gate/actor/dose5/enableDose true<br class="">
/gate/actor/dose5/enableUncertaintyDose true<br class="">
/gate/actor/dose5/enableNumberOfHits true<br class="">
<br class="">
The source is a pencil beam of protons of 100 MeV. I simulated 10000 events.<br class="">
<br class="">
Here is the histogram I got:<br class="">
<br class="">
<br class="">
My question is why is the error so large? How is it calculated?<br class="">
<br class="">
Cheers,<br class="">
<br class="">
Dmitry<br class="">
<br class="">
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