Friday, August 28, 2009

It's complicated

When will the LHC go back on-line?

Due to the huge amount of inter-dependency between different areas of work in the LHC, even a small change can necessitate a complete overhaul of the schedule. For example, something as simple as cleaning a water cooling tower - required regularly by Swiss law to prevent Legionella - has a huge impact on the planning: "When you clean the water tanks it means we don’t have water-cooling for the compressors, that means we can’t run the cryogenics, so the temperature starts to go up," explains Myers. "If a sector gets above 100 K, then the expansion effects of heating can cause problems, and we could have to replace parts."

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