<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">
Hi Michael,
<div><br>
</div>
<div>The footnote states that this value of hadronic rates 5e7 is similar to what GLUEX will run with.</div>
<div>The GLUEX will use 3.2\mu A electron beam on 10^{-4} rad. length radiator.</div>
<div><br>
</div>
<div>This gives number of bremsstrahlung photons</div>
<div><br>
</div>
<div>N_gamma = 3.2*10^{-6}*10^{-4}/(1.6*10^{-19} = 2*10^{9}</div>
<div><br>
</div>
<div>On the other hand CLAS6 was using 60nA electron beam on 10^{-3} rad. length</div>
<div>This gives number of bremss photons</div>
<div><br>
</div>
<div>N_gamma = 60*10^{-9}*10^{-3}/(1.6*10^{-19} ~ 4*10^8</div>
<div><br>
</div>
<div>From here we get only 5 times higher rate at CLAS12 compared to CLAS6</div>
<div><br>
</div>
<div>Best regards,</div>
<div>Moskov.</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>
<div>
<div>On Sep 8, 2015, at 10:04 AM, Michael C. Kunkel <<a href="mailto:mkunkel@jlab.org">mkunkel@jlab.org</a>> wrote:</div>
<br class="Apple-interchange-newline">
<blockquote type="cite">Greetings,<br>
<br>
I calculated the photon flux as others have<br>
<a href="https://www.jlab.org/exp_prog/proposals/11/PR12-11-005.pdf">https://www.jlab.org/exp_prog/proposals/11/PR12-11-005.pdf</a><br>
page 32 footnote<br>
and calculated the flux ~ 5e7 gamma/sec (side note, G12 maximum was 8e5 gamma/sec at lab 1.5 GeV)<br>
<br>
Did I make a mistake in the calculation?<br>
<br>
BR<br>
MK<br>
----------------------------------------<br>
Michael C. Kunkel, PhD<br>
Forschungszentrum Jülich<br>
Nuclear Physics Institute and Juelich Center for Hadron Physics<br>
Experimental Hadron Structure (IKP-1)<br>
www.fz-juelich.de/ikp<br>
<br>
_______________________________________________<br>
Clas_lmd mailing list<br>
Clas_lmd@jlab.org<br>
https://mailman.jlab.org/mailman/listinfo/clas_lmd<br>
<br>
<br>
-- <br>
BEGIN-ANTISPAM-VOTING-LINKS<br>
------------------------------------------------------<br>
<br>
NOTE: This message was trained as non-spam. If this is wrong,<br>
please correct the training as soon as possible.<br>
<br>
Teach CanIt if this mail (ID 03PeCp7Ap) is spam:<br>
Spam: https://www.spamtrap.odu.edu/canit/b.php?i=03PeCp7Ap&m=c48174173808&t=20150908&c=s<br>
Not spam: https://www.spamtrap.odu.edu/canit/b.php?i=03PeCp7Ap&m=c48174173808&t=20150908&c=n<br>
Forget vote: https://www.spamtrap.odu.edu/canit/b.php?i=03PeCp7Ap&m=c48174173808&t=20150908&c=f<br>
------------------------------------------------------<br>
END-ANTISPAM-VOTING-LINKS<br>
<br>
</blockquote>
</div>
<br>
<div><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px;"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; ">
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; ">
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">
Prof. Moskov Amaryan<br>
</div>
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">
Department of Physics</div>
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">
Old Dominion University</div>
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">
4600 Elkhorn Avenue</div>
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">
Norfolk, VA 23529</div>
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">
<br>
phone:757-683-4614<br>
<br>
<br>
</div>
</span></div>
</span></span></div>
<br>
</div>
</body>
</html>