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<blockquote><small>Please RSVP by 2:00pm on 9/20/11 to: <a
class="moz-txt-link-abbreviated" href="mailto:lcarlson@jlab.org">lcarlson@jlab.org</a></small><br>
</blockquote>
<p align="center"><small>Wednesday, September 21, 2011<br>
<b>***CC F113***</b><br>
12:00-1:00pm<br>
<br>
</small></p>
<p class="MsoNormal" align="center"><small><b>International Linear
Collider (ILC), Superconducting Radio
Frequency (SRF) Acceleration, and ILC High-Gradient SRF Cavity R&D
at
Jefferson Lab</b></small></p>
<p align="center"><small><br>
</small></p>
<p class="MsoNormal" align="center"><small><b>Rong-Li Geng</b></small></p>
<p align="center"><small>Thomas Jefferson National Accelerator Facility<br>
</small></p>
<small><br>
</small>
<p><small><font face="Helvetica, Arial, sans-serif"><big><small>Abstract:<br>
</small></big></font></small></p>
<p class="MsoNormal"><small>The International Linear Collider (ILC) is
a proposed future
colliding beam machine (500 GeV center of mass) based on
superconducting radio
frequency (SRF) electron/positron linacs, the same technology pioneered
by the
SRF electron linacs at CEBAF. An international team of accelerator
experts is
about to be completing the technical design of ILC in 2012. The
acceleration
gradient of SRF cavities is a crucial parameter in governing the energy
reach
as well as the cost of the machine. With the support of DOE HEP’s ILC
program and
in collaboration with Fermilab, Cornell, KEK and DESY etc, Jefferson
Lab has
been involved in the ILC cavity high gradient R&D since 2006. This
effort
resulted in the state-of-the-art gradient performance in the 1-meter
long ILC
cavities. A major fruit of JLab’s ILC high gradient program is the
establishment of repeatable electropolishing of the cavity RF surface
for
reproducible gradient performance. This success not only helped defend
the ILC
gradient choice but also laid foundation of the final surface
processing
technology for the SRF cavities of the CEBAF 12 GeV upgrade project. <span
style=""> </span>In this talk, I will: (1) briefly introduce
the ILC; (2) highlights JLab’s high gradient cavity R&D results;
(3)
presents the improved understanding of the physics of the cavity
performance
(gradient and quality factor) limits. I will also outlines future
opportunities
for high performance SRF cavity development presented by the ILC 1 TeV
upgrade
design. <span style=""> </span><span style=""> </span><span style=""> </span><span
style=""> </span><span style=""> </span></small></p>
<p><small><br>
</small></p>
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