Philosophy
I suppose this will make some people happy.
The Large Hadron Collider near Geneva will be out of action for at least two months, the European Organization for Nuclear Research (Cern) says.
Part of the new collider was turned off for the weekend while engineers investigated a magnet failure.
But a Cern spokesman said the damage to the £3.6bn ($6.6bn) particle accelerator was worse than anticipated.
The failure, known as a quench, caused around 100 of the LHC's super-cooled magnets to heat up by as much as 100C.
The fire brigade were called out after a tonne of liquid helium leaked into the tunnel at Cern, near Geneva.
Cern spokesman James Gillies said the sector that was damaged will have to be warmed up well above absolute zero so that repairs can be made.
Cern would have to shut off the new particle collider do to the repairs, he added.
Delays
The first beams were fired successfully around the accelerator's 27km (16.7 miles) underground ring over a week ago.
The crucial next step is to collide those beams head on. However, the fault appears to have ruled out any chance of these experiments taking place for the next two months at least.
The quench occurred during final testing of the last of the LHC's electrical circuits to be commissioned.
At 1127 (0927 GMT) on Friday, the LHC's online logbook recorded a quench in sector 3-4 of the accelerator, which lies between the Alice and CMS detectors.
The entry stated that helium had been lost to the tunnel and that vacuum conditions had also been lost.
It added that the Cern fire brigade had been called to the scene.
he superconducting magnets in the LHC must be supercooled to 1.9 kelvin above absolute zero, to allow them to steer particle beams around the circuit.
As a result of the quench, the temperature of about 100 of the magnets in the machine's final sector rose by around 100C.
The setback came just a day after the LHC's beam was restored after engineers replaced a faulty transformer that had hindered progress for much of the past week.
The Large Hadron Collider (LHC) has lost up to a tonne of liquid helium after some of its superconducting magnets inadvertently heated up this morning, physicsworld.com has learnt.
A log entry written by the current LHC co-ordinator at 11:27 am CET (10:27 am BST) states that there has been a “massive quench” in sector 3–4. Quenches occur when superfluid helium in the magnets rises above its operating temperature of 1.9 K, and can be caused, for example, when a proton beam veers off course.
According to the entry, firefighters were dispatched to that area of the tunnel. It also says that the vacuum in that part of the beam pipe was lost.
A source at CERN, the European lab hosting the accelerator, says that the quench caused one tonne of superfluid helium — about 1% of the LHC’s total — to escape.
An official spokesperson was not available for comment. However, a message on the machine’s website states: "During the commissioning of the final LHC sector (sector 3–4) for 5 TeV operation, an incident occurred at 12:05 [am] today resulting in a large helium leak into the tunnel. Further details are not yet known. Investigations will continue over the weekend and more information will be made available as soon as possible."
An LHC status report on the same website shows that temperatures are now being brought down, implying that technicians have been able to replace the lost helium.
The problem will be a disappointment to the operations team, who had enjoyed a highly successful media day last week when they circulated beams of protons in both directions around the machine’s 27 km-long ring.
Must have been chaos...
- Lhc...the World Didn't End--yet
"First atoms reported smashed in Large Hadron Collider" November 23td, 2009 PHYSORG.com In a statement, the European Organisation for Nuclear Research (CERN) said two beams circulating simultaneously led to collisions at all four detection points during...
- Lhc Back Online
Light the fuse and stand back. Are they CERNtain it will work this time. "Cern Large Hadron Collider restarts after 14 months" by Paul Rincon BBC News The Large Hadron Collider experiment has re-started after a 14-month hiatus while the machine was...
- Lhc And A Glitch
WANTED DEAD OR ALIVE 5,000 Euro Reward Last seen heading South "Baguette Dropped From Bird's Beak Shuts Down The Large Hadron Collider (Really)" by Stuart Fox November 5th, 2009 POPSCI The Large Hadron Collider, the world's most powerful particle...
- Annihilation Of The World Put On Hold
"LHC’s biggest collisions on hold until after 2010" by Jon Cartwright February 10th, 2009 physicsworld.com Maximum-energy collisions will take place at the Large Hadron Collider (LHC) only after 2010. Following the recommendations of LHC staff given...
- Human Error...an Lhc Problem Emerges
So, human error was to blame for the shut down of the LHC. Okay, that is acceptable--humans do make errors. It is a minor setback that can be repaired. It's a good thing that this was a terrestrial malfunction and not happening half way to Mars with...
Philosophy
LHC shut down for maintenance
I suppose this will make some people happy.
"Hadron Collider halted for months"
September 20th. 2008
BBC News
September 20th. 2008
BBC News
The Large Hadron Collider near Geneva will be out of action for at least two months, the European Organization for Nuclear Research (Cern) says.
Part of the new collider was turned off for the weekend while engineers investigated a magnet failure.
But a Cern spokesman said the damage to the £3.6bn ($6.6bn) particle accelerator was worse than anticipated.
The failure, known as a quench, caused around 100 of the LHC's super-cooled magnets to heat up by as much as 100C.
The fire brigade were called out after a tonne of liquid helium leaked into the tunnel at Cern, near Geneva.
Cern spokesman James Gillies said the sector that was damaged will have to be warmed up well above absolute zero so that repairs can be made.
Cern would have to shut off the new particle collider do to the repairs, he added.
Delays
The first beams were fired successfully around the accelerator's 27km (16.7 miles) underground ring over a week ago.
The crucial next step is to collide those beams head on. However, the fault appears to have ruled out any chance of these experiments taking place for the next two months at least.
The quench occurred during final testing of the last of the LHC's electrical circuits to be commissioned.
At 1127 (0927 GMT) on Friday, the LHC's online logbook recorded a quench in sector 3-4 of the accelerator, which lies between the Alice and CMS detectors.
The entry stated that helium had been lost to the tunnel and that vacuum conditions had also been lost.
It added that the Cern fire brigade had been called to the scene.
he superconducting magnets in the LHC must be supercooled to 1.9 kelvin above absolute zero, to allow them to steer particle beams around the circuit.
As a result of the quench, the temperature of about 100 of the magnets in the machine's final sector rose by around 100C.
The setback came just a day after the LHC's beam was restored after engineers replaced a faulty transformer that had hindered progress for much of the past week.
"LHC loses liquid helium"
by
Jon Cartwright
September 19th, 2008
physicsworld.com
by
Jon Cartwright
September 19th, 2008
physicsworld.com
The Large Hadron Collider (LHC) has lost up to a tonne of liquid helium after some of its superconducting magnets inadvertently heated up this morning, physicsworld.com has learnt.
A log entry written by the current LHC co-ordinator at 11:27 am CET (10:27 am BST) states that there has been a “massive quench” in sector 3–4. Quenches occur when superfluid helium in the magnets rises above its operating temperature of 1.9 K, and can be caused, for example, when a proton beam veers off course.
According to the entry, firefighters were dispatched to that area of the tunnel. It also says that the vacuum in that part of the beam pipe was lost.
A source at CERN, the European lab hosting the accelerator, says that the quench caused one tonne of superfluid helium — about 1% of the LHC’s total — to escape.
An official spokesperson was not available for comment. However, a message on the machine’s website states: "During the commissioning of the final LHC sector (sector 3–4) for 5 TeV operation, an incident occurred at 12:05 [am] today resulting in a large helium leak into the tunnel. Further details are not yet known. Investigations will continue over the weekend and more information will be made available as soon as possible."
An LHC status report on the same website shows that temperatures are now being brought down, implying that technicians have been able to replace the lost helium.
The problem will be a disappointment to the operations team, who had enjoyed a highly successful media day last week when they circulated beams of protons in both directions around the machine’s 27 km-long ring.
Must have been chaos...
- Lhc...the World Didn't End--yet
"First atoms reported smashed in Large Hadron Collider" November 23td, 2009 PHYSORG.com In a statement, the European Organisation for Nuclear Research (CERN) said two beams circulating simultaneously led to collisions at all four detection points during...
- Lhc Back Online
Light the fuse and stand back. Are they CERNtain it will work this time. "Cern Large Hadron Collider restarts after 14 months" by Paul Rincon BBC News The Large Hadron Collider experiment has re-started after a 14-month hiatus while the machine was...
- Lhc And A Glitch
WANTED DEAD OR ALIVE 5,000 Euro Reward Last seen heading South "Baguette Dropped From Bird's Beak Shuts Down The Large Hadron Collider (Really)" by Stuart Fox November 5th, 2009 POPSCI The Large Hadron Collider, the world's most powerful particle...
- Annihilation Of The World Put On Hold
"LHC’s biggest collisions on hold until after 2010" by Jon Cartwright February 10th, 2009 physicsworld.com Maximum-energy collisions will take place at the Large Hadron Collider (LHC) only after 2010. Following the recommendations of LHC staff given...
- Human Error...an Lhc Problem Emerges
So, human error was to blame for the shut down of the LHC. Okay, that is acceptable--humans do make errors. It is a minor setback that can be repaired. It's a good thing that this was a terrestrial malfunction and not happening half way to Mars with...