<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<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);">
Colleagues,</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
We will have a BTEAM today.</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Here is where we left it at two weeks ago:</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<a href="https://accwiki.acc.jlab.org/do/view/BTeam/BTeam20201013">https://accwiki.acc.jlab.org/do/view/BTeam/BTeam20201013</a><br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
In the rest of this email, I will refer to the item #s as they are presented in the link above.</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Since then, we had activity on:</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
item 7:</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-family:arial, verdana, sans-serif;font-size:13.65px;text-align:left;background-color:rgb(255, 255, 255);display:inline !important">Review (ongoing) of Hall controls related to FSDs, target positions etc..</span><br style="font-family:arial, verdana, sans-serif;font-size:13.65px;text-align:left;background-color:rgb(255, 255, 255)">
<span style="font-family:arial, verdana, sans-serif;font-size:13.65px;text-align:left;background-color:rgb(255, 255, 255);display:inline !important">Brian, Yves, Hall C (David Flay )</span><br style="font-family:arial, verdana, sans-serif;font-size:13.65px;text-align:left;background-color:rgb(255, 255, 255)">
<br style="font-family:arial, verdana, sans-serif;font-size:13.65px;text-align:left;background-color:rgb(255, 255, 255)">
<i style="font-family:arial, verdana, sans-serif;font-size:13.65px;text-align:left;background-color:rgb(255, 255, 255)">Currently in meetings with David and Brad , we are particularly concerned about experiments with long glass targets (alignment issues, beam
steering, rastering). We are concluding that one might have to upgrade Hall A to have a stronger raster placed after all (most) quadrupoles. Jay Benesch studied that for the Moller experiment and we are reviewing some of his options. One option looked at is
moving quads 1H01/1H04 upstream of raster and Moller target.</i><br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<i style="font-family:arial, verdana, sans-serif;font-size:13.65px;text-align:left;background-color:rgb(255, 255, 255)"><br>
</i></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
The review for the SBS experiment E12-09-016 took place on the 22nd. It generated action items:</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
(We are still drafting the final report, it probably will be released this coming friday)</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Accelerator related recommendations:</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<p style="font-family:Times;font-size:medium">The choice of the raster pattern needs to be motivated. Whether one has to use a circular or square raster will affect the optics configuration of the beamline. Likewise, there is an upper limit on the raster size
beyond which it may become difficult to deliver beam without scraping on the long 3He target.</p>
<p style="font-family:Times;font-size:medium"><br>
</p>
<p style="font-family:Times;font-size:medium"></p>
<p style="font-family:Times;font-size:medium">· The target alignment procedure with beam needs to be detailed in an OPS procedure. This also should include a description on how operations will ensure the beam alignment stays within tolerances during beam delivery.</p>
<p style="font-family:Times;font-size:medium"><br>
</p>
<p style="font-family:Times;font-size:medium"></p>
<p style="font-family:Times;font-size:medium">· The experimenters have a plan for commissioning the SBS correctors and studying the effect of the stray field on beam delivery. A formal procedure needs to be developed with operations to eliminate ambiguities
and miscommunications between MCC and the Hall A control rooms.</p>
<p style="font-family:Times;font-size:medium"><br>
</p>
<p style="font-family:Times;font-size:medium"></p>
<p style="font-family:Times;font-size:medium">· Develop a solution allowing for centering the beam on target with the required raster pattern along with any specialized targets on the target ladder.</p>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
We have a working group with physics to go through this (Brad, D. Flay, M. Jones, J. Benesch, B. Freeman, myself) . Next meeting is in a week.</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
item 13: Rehauling the optics troubl<span style="color: rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;">eshooting guide. </span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
We had a preliminary meeting and have another one coming up this friday (Brian F., Mike A. , myself)</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
to arrive at a timeline and define the scope. We are shooting for a timeline and scope by early december and a first draft by February.</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
We closed out:</div>
<div style="color: rgb(0, 0, 0);"><br>
</div>
<div style="color: rgb(0, 0, 0);"><span style="text-align: left; background-color: rgb(255, 255, 255); display: inline !important;"><font face="Calibri, Arial, Helvetica, sans-serif">item 2: </font></span><span style="font-family: arial, verdana, sans-serif; font-size: 13.65px;">RF
landscape for restart, implication for optics (Jay B.) (see link above for summary)</span></div>
<div style="color: rgb(0, 0, 0);"><span style="font-family: arial, verdana, sans-serif; font-size: 13.65px;">item 8: <span style="text-align:left;background-color:rgb(255, 255, 255);display:inline !important">Global synchronized locks spanning the whole machine </span></span></div>
<div style="color: rgb(0, 0, 0);"><span style="font-family: arial, verdana, sans-serif; font-size: 13.65px;"> was deferred (lack of resources )</span></div>
<div style="color: rgb(0, 0, 0);"><span style="font-family: arial, verdana, sans-serif; font-size: 13.65px;"><br>
</span></div>
<div style="color: rgb(0, 0, 0);"><span style="font-family: arial, verdana, sans-serif; font-size: 13.65px;">item 12: </span>Review of Inj Chicane aperture. Is it properly handled?</div>
<div style="color: rgb(0, 0, 0);"><span style="font-family: arial, verdana, sans-serif; font-size: 13.65px;"><span style="text-align:left;background-color:rgb(255, 255, 255);display:inline !important">-> what is the clearance?</span></span></div>
<div style="color: rgb(0, 0, 0);"><span style="font-family: arial, verdana, sans-serif; font-size: 13.65px;"><span style="text-align:left;background-color:rgb(255, 255, 255);display:inline !important">See the link of previous minutes for the summary of the
findings.</span></span></div>
<div style="color: rgb(0, 0, 0);"><span style="font-family: arial, verdana, sans-serif; font-size: 13.65px;"><span style="text-align:left;background-color:rgb(255, 255, 255);display:inline !important"><br>
</span></span></div>
<div style="color: rgb(0, 0, 0);"><span style="font-family: arial, verdana, sans-serif; font-size: 13.65px;"><span style="text-align:left;background-color:rgb(255, 255, 255);display:inline !important"><br>
</span></span></div>
<div style="color: rgb(0, 0, 0);"><span style="font-family: arial, verdana, sans-serif; font-size: 13.65px;">we need help (from OPS ) on :</span></div>
<div style="color: rgb(0, 0, 0);">item 9: Review of state of ORFP, lesson learned from last runs (Ops, Yves)</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
items 3,4,5,6 in progress</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
item 10 I<span style="font-family: arial, verdana, sans-serif; font-size: 13.65px;">mplication of new Injector setup to ORFP ? (Reza, Dennis)</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-family: arial, verdana, sans-serif; font-size: 13.65px;"><br>
</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-family: arial, verdana, sans-serif; font-size: 13.65px;">Reza indicated that He and Alicia are hoping to give a presentation on prelimary findings for this sometimes in December. Note that most of the implications have to do with a 2022 setup.</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-family:arial, verdana, sans-serif;font-size:13.65px;text-align:left;background-color:rgb(255, 255, 255);display:inline !important">Item 11 : Review of new diagnostics ? What do we need ? (Mike T.)</span><br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-family:arial, verdana, sans-serif;font-size:13.65px;text-align:left;background-color:rgb(255, 255, 255);display:inline !important"><br>
</span></div>
<div style="color: rgb(0, 0, 0);"><font face="arial, verdana, sans-serif"><span style="font-size: 13.65px;">This is a broad topic that will be best addressed when we start cross-correlating our needs with those of future experiments. In that regard, a better
integration with physics would be beneficial (similarly to the current working group dealing with SBS) . </span></font></div>
<div style="color: rgb(0, 0, 0);"><br>
</div>
<div style="color: rgb(0, 0, 0);"><br>
</div>
</body>
</html>