<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif;font-size:16px"><div id="yui_3_16_0_1_1447448931357_4661">Hi all,</div><pre id="yui_3_16_0_1_1447448931357_4838" class="">I need to know how a pencil beam source is defined by the following characteristics?</pre><pre id="yui_3_16_0_1_1447448931357_4838" class="">If anyone can explain me how I aprecciate it</pre><pre id="yui_3_16_0_1_1447448931357_4838" class="">Thank you</pre><pre id="yui_3_16_0_1_1447448931357_4838" class=""><div dir="ltr" id="yui_3_16_0_1_1447448931357_5211" class=""><br id="yui_3_16_0_1_1447448931357_5213" class=""></div></pre><pre id="yui_3_16_0_1_1447448931357_4838" class=""># spot size
/gate/source/PBS/setSigmaX [spot_size_X] mm
/gate/source/PBS/setSigmaY [spot_size_Y] mm<br id="yui_3_16_0_1_1447448931357_5038" class="">
#divergence
/gate/source/PBS/setSigmaTheta [divergence_Teta] mrad
/gate/source/PBS/setSigmaPhi [divergence_Phi] mrad<br id="yui_3_16_0_1_1447448931357_5063" class="">
#emittance
/gate/source/PBS/setEllipseXThetaEmittance [Emittance_X_Theta] mm*mrad
/gate/source/PBS/setEllipseYPhiEmittance [Emittance_Y_Phi] mm*mrad<br id="yui_3_16_0_1_1447448931357_5088" class="">
</pre></div></body></html>