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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoPlainText>Hi Kevin,<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>I talked to Dave and he believes that he can get to a 2cm spot size just with defocusing so no raster. I used 1.6cm as a safety margin. <o:p></o:p></p><p class=MsoPlainText style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>The gallium length is 10 radiation lengths - 210mm<o:p></o:p></p><p class=MsoPlainText style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>I made the analysis with 12 channels but I couldn't get similar cross section tube fitting to fit so the model has 6 channels. I can run an analysis with the 6 channels later it won’t be significantly different – same flow. I would prefer not to straddle two channels as I couldn’t be sure the flow is equal in each.<o:p></o:p></p><p class=MsoPlainText style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>COMSOL v4.3b<o:p></o:p></p><p class=MsoPlainText style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>Total flow is 23 lpm (not 2.3)<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>I hope to give you better numbers tonight.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Cheers, Joe<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><a name="_MailEndCompose"><o:p> </o:p></a></p><p class=MsoPlainText>-----Original Message-----<br>From: Kevin Jordan [mailto:jordan@jlab.org] <br>Sent: Thursday, December 03, 2015 4:01 PM<br>To: isotope-prod@jlab.org<br>Cc: Joe Gubeli<br>Subject: draft of target region</p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Here is the draft, I still need a couple numbers to finish off, comments are welcome<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p></div></body></html>