Whats going on with the LHC?

(Warping in a universe with extra dimensions would be an amazing discovery, but does Randall expect to find any evidence? The LHC, she explains, could hold the key. "The LHC will allow us to explore an energy scale never reached before – the TeV scale. We know there are questions about this particular scale. We know the simple Higgs theory is incomplete, so there should be something else around. That’s why people think it should be supersymmetry or extra dimensions, something just explaining why the Higgs boson is as light as it is," she explains. Randall works in particular on the idea of warped geometry. If this is true, experiments at the LHC should see particles that travel in extra dimensions, the mass of which is around the tera-electron-volt scale that the LHC is studying.

One fascinating area of modern physics linked to extra dimensions is that of quantum gravity. Gravity is the best known among the forces that we experience every day, yet there is no theory that can describe it at the quantum level. Gravity also still holds secrets experimentally, because its force-carrying particle, the graviton, remains hidden from view, but Randall’s theories of extra dimensions could shed light here, too.)

The graviton has never been proven it is still a theory.
 
Re: Get ready with the LHC

CERN made that comment for the same reason that I made it above...

We "see" particle collissions every day, countless billions of them, whose energies are many orders of magnitude higher than the TeV energies that will exist in the LHC. Cosmic ray collissions, which involve large hadrons, are occuring all the time in the atmosphere and no black holes swollow the Earth and the Earth isn't otherwise destroyed. And this has been going on for about 4 billions years.
Click to expand...

If the orders of magnitude are higher in space why didnt they build it in space?
 
Re: Get ready with the LHC

If the orders of magnitude are higher in space why didnt they build it in space?
Click to expand...

Not in "space" - in our atmosphere.

The difference between naturally occuring cosmic ray collisions in the atmosphere and the LHC is confinement. The naturally occuring collisions between cosmic rays and particles in the air is that the naturally occuring events occur randomly and aren't confined to a laboratory situation. At CERN they can confine the events to the laboratory and closely observe the results of the events.

CERN will have the ability to set up an experiment that they can control WRT the timing of the events. What they can't do, at least today, is create the level of energy involved in the collisions relative to what occurs in cosmic ray collisions. The energy involved concerns the velocity and mass of the particles that collide. We simply can't accelerate hadrons to the velocities that cosmic rays have when they collide with our Earth based particles in the atmosphere. Even though we have been able to accelerate electrons to velocities extremely close to c for almost 50 years we can't accelerate hadrons (nuclear particles like protons and neutrons), which have rest masses ~1,840 times greater than electrons, to cosmic ray velocities.

You have to remember that when we closely approach the speed of light the mass of the particles invovled increase as the square of the differential increase in velocity. Even small increases in velocity involve huge increases in mass, thus momentum. Mass involves inertia and inertia is the aspect of mass that resists acceleration. The energy required to make a specific increase in velocity, for the same rest mass, is greater than the previous similar change in velocity. There is a limit statement in the equation that eventually says that it will take an infinitly large increase in energy to increase the velocity an infinitesimally small amount to reach the speed of light.
 
The Hacker Attack...

The website - www.cmsmon.cern.ch - can no longer be accessed by the public as a result of the Hacker attack.

see:
scicern212_big.gif


More at:

http://www.telegraph.co.uk

:oops:
 
Re: The energy missing...Halted!!!

/ttiforum/images/graemlins/mad.gif
http://news.bbc.co.uk

Quoted:

<font color="red"> Section damaged

On Friday, a 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. [/COLOR]

More at link... /ttiforum/images/graemlins/confused.gif
 
Re:Back to the past... The energy missing...

more:
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.

The superconducting magnets in the LHC must be supercooled to 1.9 Kelvin (-271C; -456F), to allow them to steer particle beams around the circuit.

As a result of the quench, the temperature of some magnets in the machine's final sector rose dramatically.

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...Video


/ttiforum/images/graemlins/confused.gif
 
Re:First Images Emerge of Damage to the LHC

Quoted:
<font color="blue"> On September 19th, CERN announced that the Large Hadron Collider had suffered a major incident, known as a "quench". An electrical short between two of the superconducting magnets had kick-started a helium coolant leak inside the tunnels housing the accelerator ring. The quench caused the magnets to rapidly heat up, severely damaging them. The violent release of coolant ripped equipment from their concrete anchors, ensuring a huge repair operation would need to be carried out. However, it was a while before engineers were able to access the damage and the news wasn't good: The LHC would be out of commission until the spring of 2009 at the earliest. That was such a sad day. [/COLOR]

damage_lhc1-580x318.jpg

Caption said:
In this second image, the extent of the damage is pretty clear. Assuming the accelerator beam-line used to be straight (unfortunately, there is no "before" picture), the violent displacement of a huge magnet (weighing several tonnes) is obvious.

takken from:
Link to universetoday.com /ttiforum/images/graemlins/confused.gif
 
Re:First Images Emerge of Damage to the LHC

Mind if I steal that picture and throw it in my thread?

I will anyway...:)
 
Re:First Images Emerge of Damage to the LHC

May 1st is the day for refiring-- at least according to CERN still.

3 months 10 days...
 
Perhaps if the universe is 'aware'...
IE; double-slit experiment...

If the outcome is changed simply by the act of observation,
...

Let me ask you this -
Is the LHC not one large observation?

So now you tell me, how that potentially could change things?

 
Back
Top