<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body dir="auto">
Thanks Jay,
<div><br>
</div>
<div>Cheers,<br>
<br>
<div dir="ltr">
<div>
<p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt;"><span style="background-color: rgba(255, 255, 255, 0);">Alex<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt;"><span style="background-color: rgba(255, 255, 255, 0);">___________________________________<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt;"><span style="background-color: rgba(255, 255, 255, 0);">S. Alex Bogacz,<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt;"><span style="background-color: rgba(255, 255, 255, 0);">Accelerator Physics Group Leader<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt;"><span style="background-color: rgba(255, 255, 255, 0);">Center for Advanced Studies of Accelerators<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt;"><span style="background-color: rgba(255, 255, 255, 0);">Jefferson Lab<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt;"><font color="#000000"><span style="caret-color: rgb(0, 0, 0); background-color: rgba(255, 255, 255, 0);"><a href="x-apple-data-detectors://8" dir="ltr" x-apple-data-detectors="true" x-apple-data-detectors-type="address" x-apple-data-detectors-result="8" style="text-decoration-color: rgba(127, 127, 127, 0.380392);">12000
Jefferson Avenue,</a><o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt;"><font color="#000000"><span style="caret-color: rgb(0, 0, 0); background-color: rgba(255, 255, 255, 0);"><a href="x-apple-data-detectors://8" dir="ltr" x-apple-data-detectors="true" x-apple-data-detectors-type="address" x-apple-data-detectors-result="8" style="text-decoration-color: rgba(127, 127, 127, 0.380392);">Newport
News, VA 23606</a><o:p></o:p></span></font></p>
</div>
<span style="background-color: rgba(255, 255, 255, 0);">___________________________________</span>
<div>Sent from my iPhone</div>
</div>
<div dir="ltr"><br>
<blockquote type="cite">On Jun 29, 2020, at 7:54 AM, Jay Benesch <benesch@jlab.org> wrote:<br>
<br>
</blockquote>
</div>
<blockquote type="cite">
<div dir="ltr"><span>Alex, at least, may know all these tricks. For me and others, it may be informative. </span><br>
<span></span><br>
<span>https://arxiv.org/abs/2006.15051</span><br>
<span></span><br>
<span>Arc-Like Variable Bunch Compressors</span><br>
<span>Peter H. Williams, Gustavo Pérez-Segurana, Ian R. Bailey, Sara Thorin, Bill Kyle, Jonas Björklund Svensson</span><br>
<span></span><br>
<span> Electron bunch compressors formed of achromat arcs have a natural advantage over the more commonly used chicane compressors in that linearisation of the longitudinal phase space is of the correct sign to compensate for the curvature imprinted by rf
acceleration. Here we extend the utility of arc compressors to enable variation of the longitudinal compaction within a fixed footprint. We also show that this variability can be achieved independently order-by-order in momentum deviation. The technique we
employ consists of additional dipoles, leading to the advantageous property that variability can be achieved without incurring significant penalty in terms of chromatic degradation. We show this by comparison to an alternative system where additional quadrupoles
are utilised to enable variation of momentum compaction. Each of these alternative approaches are being considered in the context of an upgrade of the MAX IV linac, Sweden, to enable a soft X-ray free-electron laser (FEL) in addition to its existing functions.
</span><br>
<span></span><br>
<span>Comments: 8 pages</span><br>
<span>Subjects: Accelerator Physics (physics.acc-ph)</span><br>
<span>Cite as: arXiv:2006.15051 [physics.acc-ph]</span><br>
<span></span><br>
<span>_______________________________________________</span><br>
<span>BTeam mailing list</span><br>
<span>BTeam@jlab.org</span><br>
<span>https://mailman.jlab.org/mailman/listinfo/bteam</span><br>
</div>
</blockquote>
</div>
</body>
</html>