That's 1.06 million cubic feet of the gas at standard temperature and presure (STP).Originally Posted by Warren Platts
Established Member
That's 1.06 million cubic feet of the gas at standard temperature and presure (STP).
Order of Kilopi
About 0.15 Hindenbergs.
Order of Kilopi
An interesting idea for a new unit of measurement. Oh, the humanity!
Order of Kilopi
Nitpicking, "Hindenburg".
Order of Kilopi
It would be perfect for natural gas!An interesting idea for a new unit of measurement. Oh, the humanity!
Order of Kilopi
Or for hydrogen if that "hydrogen economy" thingy ever takes off.It would be perfect for natural gas!
Edited to add: Of course milliHindenburgs (mHb) would be more likely for billing purposes.
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How many hindenburgs in a humanity?
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Order of Kilopi
Unh, unh, unh!This is a science board and we use SI-style units here! So there's hindenburgs (Hb) and millihindenburgs (mHb) and microhindenburgs (muHb) and kilohindenburgs (kHb), etc., etc., but no humanities. (Hmmm ... ?
)
This little off-topic balloon excursion has really taken off. Time to deflate this one and get back to the topic!
Order of Kilopi
But what about those units that work well in some formulas...like Luftballoons?
I hate to carry that factor of 99 around.
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From Time (Magazine).com
Fixing the world's largest atom smasher will cost at least 25 million francs ($21 million) and may take until early summer, its operator said Monday.
....
The European Organization for Nuclear Research recently said that the repairs would be completed by May or early June. Spokesman James Gillies said the organization know as CERN is now estimating the restart will be at the end of June or later.
....
The organization has blamed the shutdown on the failure of a single, badly soldered electrical connection.
....
The cost of the work will fall within the organization's existing budget, Gillies said.
...
Scientists have taken the setback in stride, saying that particle colliders always have such problems in the startup phase.
Order of Kilopi
I estimate that a humanity contains 23,880,434,783 kilograms of hydrogen.
Figures subject to change over time.
Established Member
Forgive my denseness, I'm trying to understand this in lay fashion.:
They were increasing power in the affected section.
At a certain point in the power increase, resistance developed due to a badly soldered connection?
The resistance was detected and safety systems attempted to reduce power but for some reason an arc occured?(I really don't understand this part but my knowledge of electricity is essentially nil)
The arc punctured a line/vessel containing liquid helium allowing it to boil off into areas of vacuum?
The liquid helium boiled off/expanded so violently that it moved/shifted/caused physical damage to large structures in proximity of the arc, in spite of safety valves trying to reduce the pressure?
The flowing helium carried soot and debris from the arc into neighboring areas of the LHC?
Established Member
From what I have read the connection was at very low temperature to make use of superconductivity. The arc heated the connection and brought the material in the joint above the point of superconductivity.
Due to current flowing through the 7500 amperes heated the connection and surrounds before the backup system could dump the charge. So and there was a rapid rise in temperature. I do not know the voltage but for the electric trains in Perth it is 6000 amperes at 25000 volts. Each magnet is supplied an enormous amount of power to generate the field to control the beam line.
Magnets have exploded at other particle accelerators in initialization runs so it is not a new phenomena. What is new is the sheer scale of how much more powerful the CERN particle accelerator will eventually be.
As a note of interest in the universe today column some new unexplained physics with muons outside the beam line were discovered some months back by the Fermilab scientists at TeVatron link Physorg article.
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From BBC: Collider 'needs warning system'
ETA: more on Universe TodayAn official investigation into the accident at the Large Hadron Collider has recommended that an early warning system be installed.
This system would detect the early stages of a helium leak, following an incident that has shut down the LHC until June 2009.
[...]
The report also confirmed the damage would cost £14 million to repair and that experiments will not begin until next summer.
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Wow, that's some major damage.
I guess the helium leak had quite a bit of force behind it to cause that much damage to such huge and heavy piece(s) of equipment. No holiday breaks for those engineers.
Order of Kilopi
On "Wired Magazine - On-line". LinkEngineers discovered two vacuum leaks in areas of the enormous atom smasher that are supposed to be maintained at ultracold temperatures. They’ll have to warm those areas up to complete the repairs, which will set back the project another couple of months.
Order of Kilopi
I assume it means, air leaking into the vacuum. It sure sounds like some of that vacuum leaked out into the air!
Established Member
It's like when someone opens the darkroom door and lets out all the dark.
(OK, kids, all together now: "What's a darkroom, old timer?")
Fred
"For shame, gentlemen, pack your evidence a little better against another time."
-- John Dryden, "The Vindication of The Duke of Guise" 1684
Bad Post-Doc
I was about to say, "Duh--they use one in Freaky Friday." But then I remembered the remake.
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Order of Kilopi
Darkroom--those come from the fact that you better not remove your SanDisk card from your camera before filling it up, or all the pictures on it will fade away.
Established Member
Apparently some researchers are suggesting that if the LHC produces the Higgs boson particle the results may include a time reversal such that the LHC is prevented from producing the particle in the first place.
Tounge in cheek? Anyway:
http://www.nytimes.com/2009/10/13/sc...13lhc.html?hpwA pair of otherwise distinguished physicists have suggested that the hypothesized Higgs boson, which physicists hope to produce with the collider, might be so abhorrent to nature that its creation would ripple backward through time and stop the collider before it could make one, like a time traveler who goes back in time to kill his grandfather.
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I'm sure by creating a huge liquid helium leak in the accelerator's magnets... hey wait a second!
Order of Kilopi
It's even deeper than that, if I'm reading this paragraph correctly.
This malign influence from the future, they argue, could explain why the United States Superconducting Supercollider, also designed to find the Higgs, was canceled in 1993 after billions of dollars had already been spent, an event so unlikely that Dr. Nielsen calls it an “anti-miracle.”
Honored Member
"Rotating Cylinders and the Possibility of Global Causality Violation" - Larry Niven short story, ca. 1972
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Any news of the next round of the LHSC? Is it up and running again? When can I order my mini-black hole?
Established Member
Circa 1977, actually. I remember reading it in Analog.
Fred
"For shame, gentlemen, pack your evidence a little better against another time."
-- John Dryden, "The Vindication of The Duke of Guise" 1684
Order of Kilopi
Yes, Analog of August 1977. The title comes from Frank Tipler's 1974 paper of the same name in Physical Review D.
Grant Hutchison
Order of Kilopi
http://user.web.cern.ch/user/news/2009/091026.html
26 October 2009
Particles are back in the LHC!
The engines have started...let us race!
Established Member
Exactly 35/97ths. (or would that be 97/35ths???)
Vulcan Administrator
If this is a joke, it's fooled a lot of news organizations:
Large Hadron Collider stalled again... thanks to chunk of baguette
The rehabilitation of the beleaguered Large Hadron Collider was on hold tonight after the failure of one of its powerful cooling units caused by an errant chunk of baguette.
The £4 billion particle-collider faced more than a year of delays after a helium leak stymied the project in its first few days of operation. It is gradually being switched back on over the coming months but suffered a new setback on Tuesday morning.
Scientists at the CERN particle physics laboratory in Geneva noticed that the system’s carefully monitored temperatures were creeping up.
Further investigation into the failure of a cryogenic cooling plant revealed an unusual impediment. A piece of crusty bread had paralysed a high voltage installation that should have been powering the cooling unit.
Everything I need to know I learned through Googling.
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