<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
fanning out Sebastian's response for everyone...</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Michael<br>
</div>
<div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div id="appendonsend"></div>
<hr tabindex="-1" style="display:inline-block; width:98%">
<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> Sebastian Kuhn <kuhn@jlab.org><br>
<b>Sent:</b> Thursday, August 27, 2020 08:48<br>
<b>To:</b> Michael Tiefenback <tiefen@jlab.org><br>
<b>Cc:</b> Mohammad Hattawy <hattawy@jlab.org>; Eric Christy <christy@jlab.org><br>
<b>Subject:</b> Re: current to Hall B?</font>
<div> </div>
</div>
<div class="" style="word-wrap:break-word; line-break:after-white-space">Dear Michael,
<div class=""><br class="">
</div>
<div class="">at this point, we will be starting to have to switch off detectors that may otherwise be damaged, and, yes, we have reduced the beam current to 180 nA (we could otherwise run with 250-300 nA!) which is the absolute maximum we can take right now
without getting into dangerous territory as far as detector occupancies and dead time are concerned. It looks to me that we won’t be able to collect anywhere close to the expected data if we can’t fix this issue.</div>
<div class=""><br class="">
</div>
<div class="">- Sebastian<br class="">
<div><br class="">
<blockquote type="cite" class="">
<div class="">On Aug 27, 2020, at 8:42 AM, Michael Tiefenback <<a href="mailto:tiefen@jlab.org" class="">tiefen@jlab.org</a>> wrote:</div>
<br class="x_Apple-interchange-newline">
<div class="">
<div class="" style="font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
Sebastian,</div>
<div class="" style="font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
Is Hall B limited in current by beam quality? We are trying to understand whether your luminosity is limited by beam quality.</div>
<div class="" style="font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">
Michael</div>
</div>
</blockquote>
</div>
<br class="">
</div>
</div>
</div>
</body>
</html>