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About LinkBacksI just hope there are no sharks in the areaOriginally Posted by Salazaar
Fraz - keep up the nice feeds. It's great to come on here and see what your all doing and getting some nice information on how things are going.
I just hope there are no sharks in the area
Fraz - keep up the nice feeds. It's great to come on here and see what your all doing and getting some nice information on how things are going.
gief blackhole!
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Another power failure
http://www.theregister.co.uk/2009/12...failure_again/
Your not powering the LHC with budget end PSU's are you?
D'oh!Another power failure
http://www.theregister.co.uk/2009/12...failure_again/
Your not powering the LHC with budget end PSU's are you?
I haven't been keeping up with things the last few days. I'd vaguely heard about this from my boss, but thought the problem was more with the power to the computer centre.
Power and cooling at CERN seems to be constant problem for reasons I don't understand. When we first started going down below ground to install + commission the trigger electronics we were strongly advised to get a head-torch for our hard hats in case of power cuts... and they were pretty regular, along with cooling problems. At one point, it wasn't so much that we had power outages, but power "innages", if that's a real word.
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Pics 30 & 20 are my favourites. How big do those magnets have to be!!
I still don't trust this thing.
But them pictures at really cool and working at that site must be pretty awesome, through I do have a question, what was the reason for building it underground?
No room on top?
A: It's HUGE. B: I guess it's hard to build something that big and keep it cold? C: So we can't see the teleporters they also built.
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Building it ~100m underground might help to reduce background radiation/particles messing with the detectors, though I'd guess available space, insulation and hiding the portal guns they're developing are also reasons.
Yeah, the reason for building it underground was for space + safety reasons. If they built it above ground they'd have to buy up all the land required to build a 27km circular building to enclose the magnets + experiments.
Background radiation isn't such a big deal, as it's very easy to exclude cosmics from the collision data. Even 100 meters underground we still get >100Hz of cosmic muons hitting the detector I work on.
Here is the latest word from the CERN Director General (just realised how scarily authoritarian "Director General" sounds...):
Dear CERNois,
This weekend we’ve seen further important progress with beam commissioning in the LHC at 450 GeV. On Friday evening, 4 December, beam circulated with more than one proton bunch for the first time. This was another significant step towards running at useful beam intensities.
Then in the early hours of Sunday, the operators succeeded in circulating four bunches in each of the LHC’s two beams and announced stable beams for the experiments. On Sunday evening there was further stable running with higher-intensity bunches. All six LHC experiments have observed collisions and collected useful quantities of data. They were able immediately to begin checking the operation of their detectors, with excellent results that augur well for the future.
Rolf Heuer
You got the power issues sorted, then?
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Yeah, I think that was sorted pretty quickly last week.You got the power issues sorted, then?
Ah good, I guess it was "just" power - fairly straightforward to replace, unless of course you use plasma conduits.
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Nah, we only use plasma conduits to power our experimental warp drive.
I KNEW IT
Oh wait, you were joking.
...Or WERE you!?
(Yes, you probably were).
probably
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I can neither confirm nor deny if I was joking. :-|
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