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Large Hadron Collider to restart in September

Protons will be skirting around the 27-km Large Hadron Collider by the end of September, say CERN officials, with the first proton collisions expected four or five weeks later.

The lab will take the unusual step of running its brand new €3 billion machine throughout the winter - with a short break around Christmas "to allow people not to get divorced!" says CERN's director for research and computing, Sergio Bertolucci.

With winter energy prices, that will add about €8 million to the LHC's electricity bill - about 40% of its annual cost. But physicists on the LHC's four giant experiments will reap the rewards by late 2010, when they should have collected enough data at a collision energy of 10 TeV to rival the Tevatron at Fermilab, perhaps seeing signs of new fundamental particles.

The €8 million cost of running the LHC through the winter will be added to the experiment's €20 million repair costs, says CERN director Sergio Bertolucci (Image: CERN)

The €8 million cost of running the LHC through the winter will be added to the experiment's €20 million repair costs, says CERN director Sergio Bertolucci (Image: CERN)

 

 


The latest startup schedule is eerily similar to last year's, when the LHC
fired upMovie Camera on 10 September. Just nine days later, an electrical fault ruptured its liquid-helium plumbing, putting the machine out of commission.

CERN is now installing an early-warning system to detect nano-ohm rises in resistance in the superconducting wires that power the LHC's bending magnets. It is also fitting all magnets with additional pressure relief valves to reduce collateral damage in case of a similar incident. Half of the valves will be in place this year.

The startup date is likely to please thousands of physicists who have had to deal with several slips in the LHC timetable in the last few years. "The schedule is aggressive," says CERN's director of accelerators and technology Steve Myers, "but we have a machine that's just raring to go."

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