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<blockquote><font face="Times New Roman, Times, serif"><small>Please
RSVP by COB on 3/20/2012 to: <a moz-do-not-send="true"
class="moz-txt-link-abbreviated" href="mailto:lcarlson@jlab.org">lcarlson@jlab.org</a></small></font><br>
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<p align="center"><font face="Times New Roman, Times, serif"><small><big>Wednesday,
March 21, 2012</big><br>
<font color="#ff0000"><big><big><big><b>***CC F113***</b></big></big></big></font><br>
12:00-1:00pm<br>
</small></font></p>
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<p><font face="Times New Roman, Times, serif">"</font><span
style="font-size: 12pt; line-height: 115%; font-family: "Times New Roman","serif";">Superconducting
Parallel-Bar Deflecting/Crabbing
Cavity Development and its Applications </span><font
face="Times New Roman, Times, serif">"</font></p>
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<h2 align="center">Subashini De Silva<font
face="Times New Roman, Times, serif"><small><b><br>
</b></small></font></h2>
<p align="center"><font face="Times New Roman, Times, serif"><small>Old
Dominion University<br>
</small></font></p>
<small><br>
</small><font face="Times New Roman, Times, serif"><small><big><small><big>Abstract:<br>
</big></small></big></small></font><br>
<small>Deflecting/crabbing cavities
serve a variety of purposes in different accelerator applications.
Primarily in
separating a single beam into multiple beams and in rotating bunches
for head
on collisions at the interaction point in particle colliders. Recently,
new
geometries for superconducting crabbing and deflecting cavities have
been
developed that have significantly improved properties over the standard
TM<sub>110
</sub>type cavities. Compact superconducting deflecting/crabbing
cavities are under
development due to strict dimensional constraints and requirements in
higher
field gradients with low surface losses. The TEM-like superconducting
parallel-bar cavity supports low operating frequencies, thus making the
designs
favorable for many of the deflecting/crabbing cavity applications.
Additionally
the wider separation of modes in the higher order mode
spectrum is advantageous in high current applications. Currently the
parallel-bar cavity is under consideration as an rf separator for the
Jefferson
Lab 12 GeV upgrade and as a crabbing structure for a possible LHC
luminosity
upgrade. The detailed design analysis of the parallel-bar cavity will
be
presented with current developments on the fabrication.<o:p></o:p></small><br>
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