[Gate-users] Profiles and depth dose curves with Ion chamber in water tank

[katrin at schnuerle.org]

Dear Anna, Dear David,

is it necessary to move the chamber?

Maybe you could simulate a cylindric actor whose height covers the depth
range that you want to measure and put a sufficient resolution in depth.

To compare to measurements, you could pick the depths from your simulations.

Best regards,

Katrin

 

Von: Gate-users <gate-users-bounces at lists.opengatecollaboration.org> Im
Auftrag von Anna Dulkys
Gesendet: Dienstag, 8. Mai 2018 16:06
An: Boersma David <david.boersma at medaustron.at>;
gate-users at lists.opengatecollaboration.org
Betreff: Re: [Gate-users] Profiles and depth dose curves with Ion chamber in
water tank

 

Hi David, 

 

first of all, thank you for your prompt response!

 

you can find my macros in the attachement. I marked all geometry and
material sepcific details with XXX.

 

What I tried at first was to move the whole chamber in my water tank along
the x-Axis with the following commands:

 

/gate/ppcyl/moves/insert translation
/gate/ppcyl/translation/setSpeed     0.5 0. 0. mm/s

 

/gate/ppspi/moves/insert translation
/gate/ppspi/translation/setSpeed     0.5 0. 0. mm/s

 

and then to simulate over a certain time in order to not move the chamber
outside of the mother volume (water tank):

 

/gate/application/setTimeStart 0. s
/gate/application/setTimeStop 300. s

 

I added the DoseActor to my sensitive air volumes airvolcyl and airvolcap.
That's where I'd like to measure my dose. Then I kinda figured out that Gate
wasn't able to calculate my dose during the movement. There was no error in
Gate but the output files were empty.

 

What I tried next was to just measure the Dose with the DoseActor at just
one spot in the water tank in my entire sensitive volume. Here I am a little
confused with the settings. My sensitive volume consists of two daughter
volumes (1 the cylinder and 2 the spherical cap). 

Do I have to add one actor for each daughter volume (so in total 2 actors)?

And do I neccessarily have to do "setSize" when I want to add the DoseActor
to my whole volume?

 

Best regards,

Anna

 

 

  _____  

Von: Gate-users <gate-users-bounces at lists.opengatecollaboration.org
<mailto:gate-users-bounces at lists.opengatecollaboration.org> > im Auftrag von
Boersma David <david.boersma at medaustron.at
<mailto:david.boersma at medaustron.at> >
Gesendet: Dienstag, 8. Mai 2018 14:17
An: gate-users at lists.opengatecollaboration.org
<mailto:gate-users at lists.opengatecollaboration.org> 
Betreff: Re: [Gate-users] Profiles and depth dose curves with Ion chamber in
water tank 

 

Hi Anna,

 

It may depend  a bit on what exactly you wish to study with your simulation.
Typically we use indeed the dose actor for depth dose curves. But if you
would like to study in detail the geometrical and other aspects of the
measurements, then you may indeed have to simulate the ionization chamber
and move it around.

 

Could you share your macro with us (maybe remove/hide the geometrical
details of the ionization chamber, if those are proprietary and you got them
under and NDA, etc)?

And could you elaborate a bit more about what kind of trouble you are
having: what did you try and which error did get from Gate? Or if there was
no error, then in which ways was the output disappointing?

 

>From the little info that you give us, I think that I would, in your
situation, not run a single simulation in which the IC is moved around, but
instead run many separate simulations, one for each of the positions of your
ionization chamber, and combine the results afterwards.

 

Good luck!
David

 

 

From: Gate-users [mailto:gate-users-bounces at lists.opengatecollaboration.org]
On Behalf Of Anna Dulkys
Sent: Tuesday, May 8, 2018 8:37 AM
To: gate-users at lists.opengatecollaboration.org
<mailto:gate-users at lists.opengatecollaboration.org> 
Subject: [Gate-users] Profiles and depth dose curves with Ion chamber in
water tank

 

Dear Gate Users, 

 

I've been trying to simulate an ionization chamber moving in a water tank in
order to get dose profiles, depth dose curves etc. I've simulated my chamber
including its effective volume. But I am having trouble recording particles
or dose in this volume along the axis that the chamber is moving (with
/gate/Chamber/moves/insert translation)

Is this even possible with Gate? Do I have to use the DoseActor?

 

Best regards,

Anna

 

Disclaimer:
Please notice our E-Mail Disclaimer
<http://www.medaustron.at/email-disclaimer/>
http://www.medaustron.at/email-disclaimer/ 

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opengatecollaboration.org/pipermail/gate-users/attachments/20180509/cfeada63/attachment.html>