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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Hi All,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">His tentative travel dates are
</span>24/04 till 22/05 so later than initially anticipated. This should work out better for us.<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Here is the abstract on what he would present:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" align="center" style="text-align:center;text-autospace:none">
<b><span style="font-size:14.0pt">Multipole Fringe Fields<o:p></o:p></span></b></p>
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<span style="font-size:8.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" align="center" style="text-align:center;text-autospace:none">
<span style="font-size:8.0pt">Bruno Muratori, ASTeC, Daresbury Laboratory (STFC) & Cockcroft Institute, UK<o:p></o:p></span></p>
<p class="MsoNormal" style="text-align:justify;text-autospace:none"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-align:justify;text-autospace:none"><span style="font-size:10.0pt">When creating an initial model of an accelerator, one usually has to resort to a hard edge model for the quadrupoles and higher order multipoles at the start
of the project. Ordinarily, it is not until much later on that a field map for the given multipoles becomes available. This can be rather inconvenient when dealing with particularly thin elements or elements which are rather close together in a beamline as
the hard edge model is usually inadequate for the level of precision desired. For example, in the EMMA project, the two types of quadrupoles used are so close together that they are usually described by a single field map or via hard edge models. The first
method has the desired accuracy but was not available at the start of the project and the second is known to be a rough approximation. An analytic expression is derived and presented for fringe fields for a multipole of any order. The theory is then successfully
applied to the EMMA quadrupoles as well as the LHC inner triplet quadrupoles. Future work and possible extensions will also be discussed.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Fay<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<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"> Gianluigi Ciovati <gciovati@jlab.org>
<br>
<b>Sent:</b> Thursday, March 21, 2019 1:21 PM<br>
<b>To:</b> Fay Hannon <fhannon@jlab.org>; Acc_Sem_Comm@jlab.org<br>
<b>Subject:</b> Re: Potential speaker - Bruno Muratori<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p><span style="font-family:"Calibri",sans-serif;color:black">Hi all,<o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black">I'm in favor.<o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black">Thanks,<o:p></o:p></span></p>
<p><span style="font-family:"Calibri",sans-serif;color:black">Gigi<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"> Acc_sem_comm <</span><a href="mailto:acc_sem_comm-bounces@jlab.org"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">acc_sem_comm-bounces@jlab.org</span></a><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">>
on behalf of Fay Hannon <</span><a href="mailto:fhannon@jlab.org"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">fhannon@jlab.org</span></a><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">><br>
<b>Sent:</b> Thursday, March 21, 2019 9:38:10 AM<br>
<b>To:</b> </span><a href="mailto:Acc_Sem_Comm@jlab.org"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Acc_Sem_Comm@jlab.org</span></a><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><br>
<b>Subject:</b> [Acc_sem_comm] Potential speaker - Bruno Muratori</span> <o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="xmsonormal">Hi,<o:p></o:p></p>
<p class="xmsonormal"> <o:p></o:p></p>
<p class="xmsonormal">It is likely that Bruno Muratori from Daresbury Lab will be at CBETA mid-late April for experiments. Would we still like him to give a seminar opportunity this visit on fringe fields? We may have to support flights from NY to Jlab to make
it work. <o:p></o:p></p>
<p class="xmsonormal"> <o:p></o:p></p>
<p class="xmsonormal">Please let me know your thoughts.<o:p></o:p></p>
<p class="xmsonormal"><br>
Fay<o:p></o:p></p>
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