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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Emmanuel Marfo<br>
<b>Sent:</b> Monday, 24 July 2017 4:13 p.m.<br>
<b>To:</b> Simon Rit<br>
<b>Subject:</b> Re: [Gate-users] Help on Varying Tube current(mAs) using Spekcalc Spectrum</font>
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<p>Dear Sir,</p>
<p>Please, From what you said I understand the number of particles to be Histories in my simulation and I also know <span style="font-size:12pt">1mAs =6.25*10^15 electrons which are probably a number of particles for 1mAs.</span></p>
<p>The number of particles = Histories. however, I know increasing the number of histories decreases the statistical uncertainty in the simulation. This is where I get confused<span style="font-family:Calibri,Helvetica,sans-serif,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols; font-size:16px">.
Please, Sir I really need help on this part. Is there any article or simple illustration that can guide me. Thanks.</span></p>
<p><span style="font-family:Calibri,Helvetica,sans-serif,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols; font-size:16px">Best regards,</span></p>
<p><span style="font-family:Calibri,Helvetica,sans-serif,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols; font-size:16px">Emmanuel Marfo</span></p>
<p><span style="font-family:Calibri,Helvetica,sans-serif,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols; font-size:16px">Student</span></p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> simon.rit@gmail.com <simon.rit@gmail.com> on behalf of Simon Rit <simon.rit@creatis.insa-lyon.fr><br>
<b>Sent:</b> Monday, 10 July 2017 6:50:49 a.m.<br>
<b>To:</b> Emmanuel Marfo<br>
<b>Cc:</b> gate-users@lists.opengatecollaboration.org<br>
<b>Subject:</b> Re: [Gate-users] Help on Varying Tube current(mAs) using Spekcalc Spectrum</font>
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<div>Hi,<br>
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The mAs is adjusted by setting the number of particles in your Gate simulation. SpekCalc provides a spectrum in number of photons per kev per cm2 per mAs @ 1 meter. So depending on your geometry, you can deduce a corresponding number of particles to simulate
in Gate.<br>
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Simon<br>
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<div class="gmail_quote">On Sat, Jul 8, 2017 at 10:54 AM, Emmanuel Marfo <span dir="ltr">
<<a href="mailto:emmanuel.marfo@postgrad.otago.ac.nz" target="_blank">emmanuel.marfo@postgrad.otago.ac.nz</a>></span> wrote:<br>
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<p>Dear Gate-Users,</p>
<p>Please, does anyone has an idea how I could adjust tube current(mAs) in GATE using Spekcalc energy spectrum as the source. Any help will be deeply appreciated. Thanks.</p>
<p>Cheers,</p>
<p>Emmanuel Marfo</p>
<p>University of Otago</p>
<p>Student</p>
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