<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Dear Maikol,<div class=""><br class=""></div><div class="">Meshes volumes are not available as a source in GATE.</div><div class=""><br class=""></div><div class="">Something you can do is to define a bigger volume as a source (like a sphere) that contain your meshe volume entirely,</div><div class="">and use the confine option to eliminate all positions outside the meshe. </div><div class=""><br class=""></div><div class="">In the GATE wiki <a href="http://wiki.opengatecollaboration.org/index.php/Users_Guide:Source" class="">http://wiki.opengatecollaboration.org/index.php/Users_Guide:Source</a> :</div><blockquote style="margin: 0 0 0 40px; border: none; padding: 0px;" class=""><div class=""><p class="">The command:
</p></div><div class=""><pre class=""> /gate/source/NAME/gps/confine NAME_phys
</pre></div><div class=""><p class="">specifies that the emission must be confined to a volume of the
Geant4 geometry. In this case, the emission distribution is the
intersection of the General Particle Source (GPS) and the Geant4 volume.
The Geant4 volume must be specified by its physical volume name:
GATEname + '_phys'. </p></div></blockquote><div class=""><div>Depending on your meshe this will take some time as many primary particles generated will be discarded. To speed up this, try to define a simple volume (like a sphere) with a shape and size as close as possible to your meshe but still including all of the meshe volume.</div><div><br class=""></div><div>Best regards,</div><div> Maxime</div><div><br class=""><blockquote type="cite" class=""><div class="">On 4 Feb 2018, at 22:53, maik sal <<a href="mailto:mmsalas@gmail.com" class="">mmsalas@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">Dear Gate-Users<div class="gmail_quote"><div dir="ltr" class=""><div class=""><br class=""></div><div class="">I would like to ask, if someone knows if it is possible to use a MESH volume as a source.</div><div class=""><br class=""></div><div class="">I use MESH volumes to mask the source (cold volume or forbid volume) and to create the geometry that I need, but now I am facing a time problem, because the mask cover 60% - 90% of the source (it is a very irregular source), it makes that many event be masked (eliminated) and the simulation take longer to achieve the expect number of event.</div><div class=""><br class=""></div><div class="">If someone has experience with that, I appreciate your help. Or, if someone knows a different way to face this kind of geometries.</div><div class=""><br class=""></div><div class="">Best regards</div><div class=""><br class=""></div><div class="">Maikol</div><div class=""><div class=""><br class=""></div><div class=""><br class=""></div></div></div>
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