<div dir="ltr"><div class="gmail_default" style="font-family:arial,sans-serif;font-size:large">Dear GATE users, </div><div class="gmail_default" style="font-family:arial,sans-serif;font-size:large"><br></div><div class="gmail_default" style="font-family:arial,sans-serif;font-size:large">I have defined a semi-cylinder dose detector as the following; </div><div class="gmail_default" style="font-family:arial,sans-serif;font-size:large"><br></div><div class="gmail_default" style="font-family:arial,sans-serif;font-size:large"><font style="background-color:rgb(243,243,243)" color="#0000ff">/gate/phantom/daughters/name                      Filmactive2<br>/gate/phantom/daughters/insert                    cylinder<br>/gate/Filmactive2/geometry/setRmin                 2.2403 cm<br>/gate/Filmactive2/geometry/setRmax                 2.2431 cm<br>/gate/Filmactive2/geometry/setPhiStart          </font><font style="background-color:rgb(243,243,243)" color="#ff9900"> </font><font style="background-color:rgb(243,243,243)"><font color="#ff9900"> -45 deg</font><br><font color="#0000ff">/gate/Filmactive2/geometry/setDeltaPhi           </font><font color="#ff00ff">  </font><font color="#ff9900">75 deg</font><br><font color="#0000ff">/gate/Filmactive2/geometry/setHeight               1 cm</font><br><font color="#0000ff">/gate/Filmactive2/placement/setTranslation        0.0 0 11 cm</font><br><font color="#0000ff">/gate/Filmactive2/placement/setRotationAxis       0 0 1</font><br><font color="#0000ff">/gate/Filmactive2/setMaterial                     Filmactivelayer</font></font><br></div><div class="gmail_default" style="font-family:arial,sans-serif;font-size:large"><br></div><div class="gmail_default" style="font-family:arial,sans-serif;font-size:large">I attached a DoseActor to that volume, </div><div class="gmail_default" style="font-family:arial,sans-serif;font-size:large"><br></div><div class="gmail_default" style="font-family:arial,sans-serif;font-size:large"><font color="#0000ff">/gate/actor/addActor                           DoseActor  targetdose2<br>/gate/actor/targetdose2/attachTo                   Filmactive2<br>/gate/actor/targetdose2/stepHitType                random<br>/gate/actor/targetdose2/setPosition                0 0 0 cm<br>/gate/actor/targetdose2/save                       output/target/targetdose2.txt<br>/gate/actor/targetdose2/saveEveryNSeconds          60<br>/gate/actor/targetdose2/enableDose                 true<br>/gate/actor/targetdose2/enableUncertaintyDose      true</font><br><br></div><div class="gmail_default" style="font-family:arial,sans-serif;font-size:large">Unfortunately, the problem is that this combination does not record any dose and the output is always zero. But, When I change the detector to a complete cylinder (as below) it calculates the dose. </div><div class="gmail_default" style="font-family:arial,sans-serif;font-size:large"><font color="#0000ff">/gate/phantom/daughters/name                      Filmactive2<br>/gate/phantom/daughters/insert                    cylinder<br>/gate/Filmactive2/geometry/setRmin                 2.2403 cm<br>/gate/Filmactive2/geometry/setRmax                 2.2431 cm<br>/gate/Filmactive2/geometry/setPhiStart           </font><font color="#ff9900"> 0 deg</font><br><font color="#0000ff">/gate/Filmactive2/geometry/setDeltaPhi         </font><font color="#ff9900">   360 deg</font><br><font color="#0000ff">/gate/Filmactive2/geometry/setHeight               1 cm</font><br><font color="#0000ff">/gate/Filmactive2/placement/setTranslation        0.0 0 11 cm</font><br><font color="#0000ff">/gate/Filmactive2/placement/setRotationAxis       0 0 1</font><br><font color="#0000ff">/gate/Filmactive2/setMaterial                     Filmactivelayer</font><br></div><div class="gmail_default" style="font-family:arial,sans-serif;font-size:large">I marked the difference between two codes in <font color="#ff9900">orange color</font>, dose any one knows the problem what is wrong? </div><div class="gmail_default" style="font-family:arial,sans-serif;font-size:large">please help it is vital for my work. </div><div class="gmail_default" style="font-family:arial,sans-serif;font-size:large"><br></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><p style="color:rgb(0,0,0);font-family:Verdana,Geneva,sans-serif;font-size:16px"><em>Best Wishes</em></p><p style="color:rgb(0,0,0);font-family:Verdana,Geneva,sans-serif;font-size:16px"><em>Musa Joya</em></p><p style="color:rgb(0,0,0);font-family:Verdana,Geneva,sans-serif;font-size:16px"><em>Ph.D. candidate in Medical Physics </em></p><p style="color:rgb(0,0,0);font-family:Verdana,Geneva,sans-serif;font-size:16px"><em>Tehran University of Medical Sciences</em></p><p style="color:rgb(0,0,0);font-family:Verdana,Geneva,sans-serif;font-size:16px"><em>Tehran, Iran &</em></p><p style="color:rgb(0,0,0);font-family:Verdana,Geneva,sans-serif;font-size:16px"><em>Lecturer of Medical Physics </em></p><p style="color:rgb(0,0,0);font-family:Verdana,Geneva,sans-serif;font-size:16px"><em>Kabul University of Medical Sciences</em></p><p style="color:rgb(0,0,0);font-family:Verdana,Geneva,sans-serif;font-size:16px"><em>Kabul, Afghanistan</em></p><p style="color:rgb(0,0,0);font-family:Verdana,Geneva,sans-serif;font-size:16px"><em>Mobile and Telegram & WhatsApp: +989381560693</em></p></div></div></div></div>