Quench of LHC inner triplet magnet causes a small leak with major consequences

Re:Quench of LHC inner triplet magnet causes a small leak wi... by gus_massa on Friday July 21, 2023 @08:52AM (#36813186)

And that does not include the problems with electric wires. We had an unofficial rule: after half an hour debugging the electric wires just change all of them. I still have nightmares about BNC connectors.

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Re:Quench of LHC inner triplet magnet causes a small leak wi... by gaze on Friday July 21, 2023 @11:30AM (#36814963)

That’s a pretty terrible rule. Unless you’re rolling over them with chair wheels, a bad BNC cable should be easy to spot by visual inspection. In my 20 years of instrumentation work it’s rarely the cable.

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Re:Quench of LHC inner triplet magnet causes a small leak wi... by gus_massa on Friday July 21, 2023 @01:41PM (#36816921)

It was a students' lab, where each device is connected and disconnected 2 or 3 times per day, 5 days per week. The wires get a lot of use and abuse.

Usually the problem is the tip that got slightly loose and the signal is now intermittent or null. IIRC, when we detected the wrong wire we had to put it in a box and the guy in charge of the lab equipment would fix it later.

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Re:Quench of LHC inner triplet magnet causes a small leak wi... by dekhn on Friday July 21, 2023 @11:39AM (#36815075)

To that rule, my team added another: when throwing away the cable, cut it in half. So nobody scrounges a cable out of the garbage can only to waste more time debugging a bad cable.

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Re:Quench of LHC inner triplet magnet causes a small leak wi... by throwawaymobule on Saturday July 22, 2023 @09:07AM (#36825920)

I try to do this with every cable I throw out, and encourage anyone to do the same. Flaky HDMI especially.

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