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Originally Posted by Argos
I´ve been involved in many things, and I know things happen, especially when it comes to such cutting-edge machines. Take this quote by CERN’s Rudiger Schmidt, coordinator of LHC machine protection:
“It takes 30 minutes to five hours to restart the LHC after a quench,” says Schmidt. “If we quench 10 times a day, it’s too much. If we never quench, we’re being too conservative. We have to operate such that we don’t quench too frequently.”
My concern when asking that question is whether quenching at high energies could be frequent enough. Was that quench expected to happen at this stage? I thought the major concern at this stage was beam collimation.
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From the press release 01101001 referred to:
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Geneva, 23 September 2008. Investigations at CERN1 following a large helium leak into sector 3-4 of the Large Hadron Collider (LHC) tunnel have indicated that the most likely cause of the incident was a faulty electrical connection between two of the accelerator’s magnets. Before a full understanding of the incident can be established, however, the sector has to be brought to room temperature and the magnets involved opened up for inspection. This will take three to four weeks. Full details of this investigation will be made available once it is complete.
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So in yesterdays official press release they are talk about a faulty electrical connection as a cause. So something "trivial" rather than systematic or principle. Of course this could mean they have to open up the system reinspect the connections....... And ofcourse we have to wait the final result.