Search found 4 matches

by NormReitzel
Mon Apr 12, 2010 1:01 pm
Forum: The Accelerator
Topic: Current Events Discussion
Replies: 512
Views: 103864

Re: Current Events Discussion

That, my friends, looks a whole lot like a quench. Since they're back up this morning, clearly it was not, or QPS did it's thing properly. I'd like to know if they had time to dump beams properly before the field collapsed, and what the time scale on the field loss actually was. Where do they dump a...
by NormReitzel
Sun Dec 13, 2009 5:28 pm
Forum: The Accelerator
Topic: LHC Shutdown schedule
Replies: 30
Views: 7340

Re: LHC Shutdown schedule

You know, it's not really about overstressing the magnets. When a magnet is run past it's limit, it quenches. There are new safety systems in place -- which have been tested in theory -- but a full quench is a titanic event and at this point in time, I think they would rather be conservative than te...
by NormReitzel
Wed Dec 09, 2009 2:41 am
Forum: The Accelerator
Topic: 30,000 AMPS, WOW!
Replies: 11
Views: 4895

Re: 30,000 AMPS, WOW!

Even though the magnet coils have essentially zero resistance, they have plenty of inductance, and it takes a reasonably stout voltage to ramp a solenoid from one field to another.
by NormReitzel
Fri Dec 04, 2009 2:20 pm
Forum: The Accelerator
Topic: Daily Schedules and Hiccups
Replies: 41
Views: 11202

Re: Daily Schedules and Hiccups

I wanted to amplify a bit on Danny's explanation of a Quench. In superconducting magnetland, a quench, which is a sudden dischartge of energy from the circulating current of a magnet, can be caused by all manner of things, not just overheating. What happens is simple - a section, often a very small ...