Hobbled LHC shuttered for repairs; 'No big deal' say scientists

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	Hobbled LHC shuttered for repairs; 'No big deal' say scientists

dewitte

9-23-2008 7:26 AM

257 views

tags:

lhc, helium

dewitte says:

It's times like this that I'm really glad they opted for the warranty and replacement plan.

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/27ff2313-2a05-4ee3-829f-ddd36870fa91/74A05846-AF09-4910-BB0C-F13E2556C58F/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.sciam.com/blog/60-second-science/post.cfm?id=hobbled-lhc-shuttered-for-repairs-n-2008-09-22" href="http://www.sciam.com/blog/60-second-science/post.cfm?id=hobbled-lhc-shuttered-for-repairs-n-2008-09-22" style="font-size: 11px;">www.sciam.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sciam.com/blog/60-second-science/post.cfm?id=hobbled-lhc-shuttered-for-repairs-n-2008-09-22"><DIV>  The European Organization for Nuclear Research (CERN) says that it will take at least two months to fix a "<A href="http://press.web.cern.ch/press/PressReleases/Releases2008/PR09.08E.html">large helium leak</A>" into the Large Hadron Collider's 17-mile tunnel. The likely cause of the drip: a faulty electrical connection between two magnets that are supposed to<A href="http://www.nytimes.com/2008/09/21/science/21collider.html"> guide the protons</A> in planned particle-collision experiments. </DIV></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sciam.com/blog/60-second-science/post.cfm?id=hobbled-lhc-shuttered-for-repairs-n-2008-09-22"><div align="center"><img src="http://content8.clipmarks.com/blog_cache/www.sciam.com/img/CA1F56BF-8332-4F95-99B6-EB7AC9FF218B" alt="" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sciam.com/blog/60-second-science/post.cfm?id=hobbled-lhc-shuttered-for-repairs-n-2008-09-22"><DIV>  The mishap occurred Friday, a day after <A href="http://lhc-first-beam.web.cern.ch/lhc-first-beam/News/lhc_080918.html">CERN admitted that a transformer had broken</A> just hours after the LHC's Sept. 10 launch. The transformer malfunction caused the tunnel to heat up from <A href="http://ap.google.com/article/ALeqM5jb-KYaSJaMqYK4MtY2C2FmcmOl2QD939CCSG0">minus 455.8 degrees Fahrenheit (2 degrees on the Kelvin scale) to minus 451.57 degrees Fahrenheit (4.5 degrees Kelvin)</A>. Once scientists replaced the transformer, the cryogenic fluids that keep the tunnel cold brought temperatures down to around minus 459.4 degrees Fahrenheit (zero degrees Kelvin), the optimal temperature for particle collisions, within a week.  </DIV></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/74A05846-AF09-4910-BB0C-F13E2556C58F/blog/" title="blog or email this clip"><img src="http://content9.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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