[Gate-users] TrackLocalTime

Thu Oct 17 16:48:21 CEST 2019

Dear Atiq,

If you have the crystal set as the sensitive detector the tracklocaltime should be the total time a particle travels, it directly corresponds to the trackLength. The ‘time’ variable describes the time point of the particle with respect to the whole simulationtime.
The energy depositions of one particle can be determined by the eventID.
Hope this helps.

Best,
Mariele

________________________________
Van: Gate-users <gate-users-bounces at lists.opengatecollaboration.org> namens gate-users-request at lists.opengatecollaboration.org
Verzonden: donderdag, oktober 17, 2019 12:16 PM
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Onderwerp: Gate-users Digest, Vol 161, Issue 17

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Today's Topics:

1. Re: Gate-users Digest, Vol 161, Issue 16 (Atiq Ur Rahman)
2. Re: Description of eventID, TrackID and parentID when attach
a sensitive detector (Atiq Ur Rahman)

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Message: 1
Date: Wed, 16 Oct 2019 22:53:32 +0800
From: Atiq Ur Rahman <atiqchep at gmail.com>
To: gate-users at lists.opengatecollaboration.org
Subject: Re: [Gate-users] Gate-users Digest, Vol 161, Issue 16
Message-ID:
<CAEQ5BgdwJOsTME=iSYwwG6eQSg-azgpNCrBKuhqB8OGTgsvyaA at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

hi John,
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?
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?
Regards
Atiq
On Wed, Oct 16, 2019 at 6:16 PM <
gate-users-request at lists.opengatecollaboration.org> wrote:

> Send Gate-users mailing list submissions to
> gate-users at lists.opengatecollaboration.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://lists.opengatecollaboration.org/mailman/listinfo/gate-users
> or, via email, send a message with subject or body 'help' to
> gate-users-request at lists.opengatecollaboration.org
>
> You can reach the person managing the list at
> gate-users-owner at lists.opengatecollaboration.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Gate-users digest..."
>
>
> Today's Topics:
>
> 1. Re: Description of eventID, TrackID and parentID when attach
> a sensitive detector (John Apostolakis)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 16 Oct 2019 09:03:34 +0000
> From: John Apostolakis <John.Apostolakis at cern.ch>
> To: Atiq Ur Rahman <atiqchep at gmail.com>
> Cc: "gate-users at lists.opengatecollaboration.org"
> <gate-users at lists.opengatecollaboration.org>
> Subject: Re: [Gate-users] Description of eventID, TrackID and parentID
> when attach a sensitive detector
> Message-ID: <E7B8656C-81D4-442B-85DD-82A4127D895B at cern.ch>
> Content-Type: text/plain; charset="utf-8"
>
> Dear Atiq,
>
> Geant4 puts secondary particles on a stack, and when a particle is
> finished being tracked picks up the last particle that was put there.
>
> 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.
>
> So the behaviour that your image documents seems quite natural.
>
> Regards,
> John
> ===================================================
> John Apostolakis, EP Department, CERN
>
> On 15 Oct 2019, at 23:57, Atiq Ur Rahman <atiqchep at gmail.com<mailto:
> atiqchep at gmail.com>> wrote:
>
> Dear Users,
> 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.
> 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.
> <image.png>
> I am attaching a situation when timestamp of next hit is smaller than
> previous time.
> <image.png>
> Can you explain that with what reference timestamp is generated in Gate?
> Regards
> Atiq
>
> _______________________________________________
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Message: 2
Date: Wed, 16 Oct 2019 23:09:26 +0800
From: Atiq Ur Rahman <atiqchep at gmail.com>
To: John Apostolakis <John.Apostolakis at cern.ch>
Cc: gate-users at lists.opengatecollaboration.org
Subject: Re: [Gate-users] Description of eventID, TrackID and parentID
when attach a sensitive detector
Message-ID:
<CAEQ5BgdxTRcrYHLJSATDAcvDu3nz++v4+ztgbhVNEA=ZRuprNA at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Hi John,
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?
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?
Regards
Atiq

On Wed, Oct 16, 2019 at 5:03 PM John Apostolakis <John.Apostolakis at cern.ch>
wrote:

> Dear Atiq,
>
> Geant4 puts secondary particles on a stack, and when a particle is
> finished being tracked picks up the last particle that was put there.
>
> 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.
>
> So the behaviour that your image documents seems quite natural.
>
> Regards,
> John
> ===================================================
> John Apostolakis, EP Department, CERN
>
> On 15 Oct 2019, at 23:57, Atiq Ur Rahman <atiqchep at gmail.com> wrote:
>
> Dear Users,
> 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.
> 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.
> <image.png>
> I am attaching a situation when timestamp of next hit is smaller than
> previous time.
> <image.png>
> Can you explain that with what reference timestamp is generated in Gate?
> Regards
> Atiq
>
> _______________________________________________
> Gate-users mailing list
> Gate-users at lists.opengatecollaboration.org
> http://lists.opengatecollaboration.org/mailman/listinfo/gate-users
>
>
>
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