<div dir="ltr"><div dir="ltr">hi John,<div> Thank you so much for your nice explanation. I got the Idea of the track ID but I am still confuse with the trackLocalTime track local time variable. What is the reference of each time stamp?<div> I actually want to calculate the clustering time (rough time needed to deposit all the energy of the particle entered into the detector). Let say, we have a gamma of 4.4 MeV. it hit the detector having pdgEncoding=22, it produces many hits in different crystals. I calculate the cluster size(number of distinct hits in the all crystals). I also want to calculate the time required for the formation of the cluster. Simply say, time needed to deposit all the energy of the incident particles. In my opinion, gammas may have short clustering time than heavy particles. Is any way to do this calculation?<br></div></div><div>Regards</div><div>Atiq</div></div><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Oct 16, 2019 at 6:16 PM <<a href="mailto:gate-users-request@lists.opengatecollaboration.org">gate-users-request@lists.opengatecollaboration.org</a>> wrote:<br></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>
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1. Re: Description of eventID, TrackID and parentID when attach<br>
a sensitive detector (John Apostolakis)<br>
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Message: 1<br>
Date: Wed, 16 Oct 2019 09:03:34 +0000<br>
From: John Apostolakis <<a href="mailto:John.Apostolakis@cern.ch" target="_blank">John.Apostolakis@cern.ch</a>><br>
To: Atiq Ur Rahman <<a href="mailto:atiqchep@gmail.com" target="_blank">atiqchep@gmail.com</a>><br>
Cc: "<a href="mailto:gate-users@lists.opengatecollaboration.org" target="_blank">gate-users@lists.opengatecollaboration.org</a>"<br>
<<a href="mailto:gate-users@lists.opengatecollaboration.org" target="_blank">gate-users@lists.opengatecollaboration.org</a>><br>
Subject: Re: [Gate-users] Description of eventID, TrackID and parentID<br>
when attach a sensitive detector<br>
Message-ID: <<a href="mailto:E7B8656C-81D4-442B-85DD-82A4127D895B@cern.ch" target="_blank">E7B8656C-81D4-442B-85DD-82A4127D895B@cern.ch</a>><br>
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<br>
Dear Atiq,<br>
<br>
Geant4 puts secondary particles on a stack, and when a particle is finished being tracked picks up the last particle that was put there.<br>
<br>
Once all the secondaries of the last particle have been dealt with (assuming that they did not create secondaries themselves) then the next particle that was created by the parent of that last particle will be processed.<br>
<br>
So the behaviour that your image documents seems quite natural.<br>
<br>
Regards,<br>
John<br>
===================================================<br>
John Apostolakis, EP Department, CERN<br>
<br>
On 15 Oct 2019, at 23:57, Atiq Ur Rahman <<a href="mailto:atiqchep@gmail.com" target="_blank">atiqchep@gmail.com</a><mailto:<a href="mailto:atiqchep@gmail.com" target="_blank">atiqchep@gmail.com</a>>> wrote:<br>
<br>
Dear Users,<br>
I am using a proton beam on a PE phantom and put PET scanner and attach a sensitive detector with it. I have printed the data column wise. How to understand parentID and trackID.<br>
In my understanding parentID is the ID of the mother particle causing current hit. Time is in increasing sequences some how but some time, it is smaller then the previous hit.<br>
<image.png><br>
I am attaching a situation when timestamp of next hit is smaller than previous time.<br>
<image.png><br>
Can you explain that with what reference timestamp is generated in Gate?<br>
Regards<br>
Atiq<br>
<br>
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</blockquote></div></div>