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ACCELERATOR SEMINAR<br>
<br>
"Superconducting RF Activities at CERN"<br>
<br>
Ed Ciapala and Erk Jensen<br>
CERN BE-Department<br>
<br>
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<p
style="language:en-US;margin-top:0pt;margin-bottom:0pt;text-align:justify;text-justify:inter-ideograph;direction:ltr;unicode-bidi:embed;vertical-align:
baseline"><span
style="font-size:12.0pt;font-family:Arial;mso-ascii-font-family:
Arial;mso-fareast-font-family:+mn-ea;mso-bidi-font-family:Arial;color:black;
mso-color-index:1;mso-font-kerning:12.0pt;language:en-US">Superconducting
RF (SRF) has played a key role in CERN’s recent flagship
accelerators, with the 288 cavities of LEP having provided over
3,500 MV circumferential voltage and the 16 LHC cavities now
successfully handling high intensity proton beams.<span
style="mso-spacerun:yes"> <br>
<br>
</span></span></p>
<p
style="language:en-US;margin-top:0pt;margin-bottom:0pt;text-align:justify;text-justify:inter-ideograph;direction:ltr;unicode-bidi:embed;vertical-align:
baseline"><span
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Arial;mso-fareast-font-family:+mn-ea;mso-bidi-font-family:Arial;color:black;
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</span></p>
<p
style="language:en-US;margin-top:0pt;margin-bottom:0pt;text-align:justify;text-justify:inter-ideograph;direction:ltr;unicode-bidi:embed;vertical-align:
baseline"><span
style="font-size:12.0pt;font-family:Arial;mso-ascii-font-family:
Arial;mso-fareast-font-family:+mn-ea;mso-bidi-font-family:Arial;color:black;
mso-color-index:1;mso-font-kerning:12.0pt;language:en-US">However,
while LEP and LHC systems had relatively modest gradients by
present-day standards, man of CERN’s planned future accelerators
call for high performance SRF systems.<span
style="mso-spacerun:yes"> </span>Ongoing work and
prototyping related </span><span
style="font-size:12.0pt;font-family:Arial;mso-ascii-font-family:
Arial;mso-fareast-font-family:+mn-ea;mso-bidi-font-family:Arial;color:black;
mso-color-index:1;mso-font-kerning:12.0pt;language:en-US">tho</span><span
style="font-size:12.0pt;font-family:Arial;mso-ascii-font-family:Arial;
mso-fareast-font-family:+mn-ea;mso-bidi-font-family:Arial;color:black;
mso-color-index:1;mso-font-kerning:12.0pt;language:en-US"> the
HIE-</span><span
style="font-size:12.0pt;font-family:Arial;mso-ascii-font-family:Arial;
mso-fareast-font-family:+mn-ea;mso-bidi-font-family:Arial;color:black;
mso-color-index:1;mso-font-kerning:12.0pt;language:en-US">Isolde</span><span
style="font-size:12.0pt;font-family:Arial;mso-ascii-font-family:Arial;
mso-fareast-font-family:+mn-ea;mso-bidi-font-family:Arial;color:black;
mso-color-index:1;mso-font-kerning:12.0pt;language:en-US"> RIB
facility upgrade, the Superconducting Proton </span><span
style="font-size:12.0pt;
font-family:Arial;mso-ascii-font-family:Arial;mso-fareast-font-family:+mn-ea;
mso-bidi-font-family:Arial;color:black;mso-color-index:1;mso-font-kerning:12.0pt;
language:en-US">Linac</span><span
style="font-size:12.0pt;font-family:Arial;
mso-ascii-font-family:Arial;mso-fareast-font-family:+mn-ea;mso-bidi-font-family:
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(SPL) and the LHC </span><span
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mso-ascii-font-family:Arial;mso-fareast-font-family:+mn-ea;mso-bidi-font-family:
Arial;color:black;mso-color-index:1;mso-font-kerning:12.0pt;language:en-US">luminosity</span><span
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mso-fareast-font-family:+mn-ea;mso-bidi-font-family:Arial;color:black;
mso-color-index:1;mso-font-kerning:12.0pt;language:en-US">
upgrade (HL-LHC) will be presented.<span
style="mso-spacerun:yes"> </span>The upgrades needed at
CERN’s facilities for cavity preparation, </span><span
style="font-size:
12.0pt;font-family:Arial;mso-ascii-font-family:Arial;mso-fareast-font-family:
+mn-ea;mso-bidi-font-family:Arial;color:black;mso-color-index:1;mso-font-kerning:
12.0pt;language:en-US">cryomodule</span><span
style="font-size:12.0pt;
font-family:Arial;mso-ascii-font-family:Arial;mso-fareast-font-family:+mn-ea;
mso-bidi-font-family:Arial;color:black;mso-color-index:1;mso-font-kerning:12.0pt;
language:en-US"> assembly and diagnostics will be described.<br>
<br>
</span></p>
<p
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baseline"><span
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Arial;mso-fareast-font-family:+mn-ea;mso-bidi-font-family:Arial;color:black;
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</span></p>
<p
style="language:en-US;margin-top:0pt;margin-bottom:0pt;text-align:justify;text-justify:inter-ideograph;direction:ltr;unicode-bidi:embed;vertical-align:
baseline"><span
style="font-size:12.0pt;font-family:Arial;mso-ascii-font-family:
Arial;mso-fareast-font-family:+mn-ea;mso-bidi-font-family:Arial;color:black;
mso-color-index:1;mso-font-kerning:12.0pt;language:en-US">Studies
and possible prototyping for future systems, such<span
style="mso-spacerun:yes"> </span>as high harmonic RF system
in LHC, a higher energy LHC (HE-LHC) and transformation of the
LHC to a </span><span
style="font-size:12.0pt;font-family:Arial;
mso-ascii-font-family:Arial;mso-fareast-font-family:+mn-ea;mso-bidi-font-family:
Arial;color:black;mso-color-index:1;mso-font-kerning:12.0pt;language:en-US">hadron</span><span
style="font-size:12.0pt;font-family:Arial;mso-ascii-font-family:Arial;
mso-fareast-font-family:+mn-ea;mso-bidi-font-family:Arial;color:black;
mso-color-index:1;mso-font-kerning:12.0pt;language:en-US">-electron
collider (</span><span
style="font-size:12.0pt;font-family:Arial;mso-ascii-font-family:Arial;
mso-fareast-font-family:+mn-ea;mso-bidi-font-family:Arial;color:black;
mso-color-index:1;mso-font-kerning:12.0pt;language:en-US">LHeC</span><span
style="font-size:12.0pt;font-family:Arial;mso-ascii-font-family:Arial;
mso-fareast-font-family:+mn-ea;mso-bidi-font-family:Arial;color:black;
mso-color-index:1;mso-font-kerning:12.0pt;language:en-US">) will
be presented.<span style="mso-spacerun:yes"> </span>With
limited in-house resources and expertise, collaboration with
partner labs and institutes is key to this interesting and
challenging work.<span style="mso-spacerun:yes"> </span>International
collaborations are already well established </span><span
style="font-size:12.0pt;font-family:Arial;mso-ascii-font-family:Arial;
mso-fareast-font-family:+mn-ea;mso-bidi-font-family:Arial;color:black;
mso-color-index:1;mso-font-kerning:12.0pt;language:en-US">for</span><span
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style="font-size:12.0pt;font-family:Arial;mso-ascii-font-family:Arial;
mso-fareast-font-family:+mn-ea;mso-bidi-font-family:Arial;color:black;
mso-color-index:1;mso-font-kerning:12.0pt;language:en-US">the</span><span
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ongoing projects (via the FP7 </span><span
style="font-size:12.0pt;font-family:Arial;mso-ascii-font-family:
Arial;mso-fareast-font-family:+mn-ea;mso-bidi-font-family:Arial;color:black;
mso-color-index:1;mso-font-kerning:12.0pt;language:en-US">program</span><span
style="font-size:12.0pt;font-family:Arial;mso-ascii-font-family:Arial;
mso-fareast-font-family:+mn-ea;mso-bidi-font-family:Arial;color:black;
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the European Commission and the US-LARP collaboration, e.g.),
but even wider and more profound collaboration is desired and
invited for these studies preparing the future.</span></p>
<br>
Tuesday, Aug. 21, 2012<br>
11:00 a.m.<br>
CEBAF Center, Room L102<br>
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