<div dir="ltr">Hi Richard,<div class="gmail_extra"><div class="gmail_quote"><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><span class=""><div>
</div>
</span><div>I don't understand what you are saying here. The number 4.65 x 10^9 tells how many hdgeant beam events you need to simulate in order to cover one second of commissioning beam. How that translates into the statement you made, which makes no reference to
MC simulations, is not clear to me. Remember that most of these 4 billion photons (about 80%) hit the primary collimator and never make it to the GlueX target.</div></div></div></div></div></blockquote><div><br></div><div>Right, sorry for being unclear. I did mean that 4.65 x 10^9 hdgeant beam events were needed to simulate one second of commissioning beam, given that most of them hit the primary collimator.</div><div><br></div><div>Thanks for clearing up my other questions.</div><div><br></div><div>---Sean</div></div><br clear="all"><div><br></div>-- <br><div dir="ltr">Sean Dobbs<br>Department of Physics & Astronomy <br>Northwestern University<br>phone: 847-467-2826</div>
</div></div>