<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Aptos;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:12.0pt;
font-family:"Aptos",sans-serif;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Aptos",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;
mso-ligatures:none;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="blue" vlink="purple" style="word-wrap:break-word">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt">There is no one zoom<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<div>
<div>
<p class="MsoNormal"><span lang="RU" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black;mso-ligatures:standardcontextual">-</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black;mso-ligatures:standardcontextual">Eugene</span><span lang="RU" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black;mso-ligatures:standardcontextual"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="RU" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black;mso-ligatures:standardcontextual"><o:p> </o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span lang="RU" style="font-size:11.0pt"><o:p> </o:p></span></p>
<div style="border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt">
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Hallb <hallb-bounces@jlab.org>
<b>On Behalf Of </b>Giovanetti, Kevin L - giovankl via Hallb<br>
<b>Sent:</b> Tuesday, April 09, 2024 12:17<br>
<b>To:</b> hallb <hallb@jlab.org>; CLAS MEMBERS <clas_members@jlab.org><br>
<b>Subject:</b> [Hallb] [EXTERNAL] RC meeting Tuesday April 9<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div id="mail-editor-reference-message-container">
<div>
<div>
<div id="mail-editor-reference-message-container">
<div>
<div>
<div id="mail-editor-reference-message-container">
<div>
<div>
<div id="mail-editor-reference-message-container">
<div>
<div>
<div id="mail-editor-reference-message-container">
<div>
<div>
<div id="mail-editor-reference-message-container">
<div>
<div>
<div id="mail-editor-reference-message-container">
<div>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt">I will be in the conference room at 1PM and I invite all those not involved in the VIP tour to join me.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">The normal Wednesday accelerator schedule is tentatively moved to Thursday (see board).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I recently posted a log as to my understanding of the current status.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">============HBLOG<o:p></o:p></span></p>
<p>Production running up until Monday day shift was good with typically 6 hours of data recording.<o:p></o:p></p>
<p>Target was changed from LD2+Pb to LD2+C during the Monday day shift. <o:p></o:p></p>
<p>Beam has been down since the start of Monday April 8 day shift 8:00 AM. There was a break in a hose for the water-cooling system. The leak sprayed cabinets so that sensitive instrumentation had to be shutdown. Crews are drying all impacted boards etc. The
goal is to have these units ready in a day or so. Once completely dry the boards will be tested [turned on]. The fix and return of the impacted cavities is potentially days.<o:p></o:p></p>
<p>To recover faster the RF crews are trying to increase gradients and explore using cavities currently “greyed out” [not powered]. The crews are strategizing the best way to boost energy with available cavities and tune beam parameters in order to restore
beam earlier.<o:p></o:p></p>
<p>Accel crews have opted to take ½ day shift to explore options. Earliest beam is 2PM<o:p></o:p></p>
<p>There is a VIP tour scheduled after lunch. Radcon will survey probably around 11AM and then we can change the hall status to restricted access.<o:p></o:p></p>
<p>The trackers are off or in safe-mode. The rest of the HallB systems are up and running.<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">============== status<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Kevin</span><o:p></o:p></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>