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<p class="MsoNormal"><span lang="EN-US">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I would like to create an idealized divergent radiation therapy field 10x10cm and ssd=1m. More precisely I would like a source such that:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span lang="EN-US" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">All particles start at the point [0 0 1] m<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span lang="EN-US" style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">Their direction sampling is equivalent to the following procedure:<o:p></o:p></span></p>
<p class="MsoListParagraph"><span lang="EN-US">Pick a point uniformly from all points in the xy plane with coordinates -5cm < x,y < 5cm.<o:p></o:p></span></p>
<p class="MsoListParagraph"><span lang="EN-US">Aim the particle gun at that point and shoot.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Is this possible in Gate? If so how?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Best<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Jan<o:p></o:p></span></p>
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<font style="BORDER-TOP-COLOR: ; BORDER-BOTTOM-COLOR: ; BORDER-RIGHT-COLOR: ; BORDER-LEFT-COLOR: " color="#000080" size="2" face="Calibri">Dr. Jan Weidner</font></td>
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