insulation - Insulation-FermiLab Failure at CERN On...

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1 Insulation--FermiLab Failure at CERN On Tuesday, March 27,2007 there was a serious failure in a high- pressure test at CERN of a Fermilab-built “inner-triplet” series of three quadrupole magnets in the tunnel of the Large Hadron Collider. The magnets focus the particle beams prior to collision at each of four interaction points around the accelerator. Preliminary indications are that structures supporting the inner “cold mass” of one of the three magnets within its enclosing cryostat broke at a pressure of 20 atmospheres, in response to asymmetric forces. Failure to account for the asymmetric loads in the engineering design of the magnet appears to be a likely cause. The test configuration corresponds to conditions that occur during a magnet quench, when a superconducting magnet suddenly “goes normal,” releasing large amounts of energy. Inner-Triplet Quadrupole Magnet Inner Support Structure Cross Section at One Support Point Fermi-Lab/CERN Follow-up From The Sunday Times April 8, 2007 Big Bang at the atomic lab after scientists get their maths wrong Jonathan Leake, Science Editor A £2 billion project to answer some of the biggest mysteries of the universe has been delayed by months after scientists building it made basic errors in their mathematical calculations. The mistakes led to an explosion deep in the tunnel at the Cern particle accelerator complex near Geneva in Switzerland. It lifted a 20-ton magnet off its mountings, filling a tunnel with helium gas and forcing an evacuation. It means that 24 magnets located all around the 17-mile circular
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insulation - Insulation-FermiLab Failure at CERN On...

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