CERN atom smasher sets new record
The world’s biggest atom smasher has set a new world record for beam
intensity, a key measure of performance and power, the European
Organisation for Nuclear Research (CERN) said Friday. On a quest to
unlock some of the universe’s deepest secrets, the Large Hadron Collider
(LHC) in Geneva collided beams with a luminosity exceeding the mark set
last year by the US Tevetron accelerator, CERN said.
In particle physics, luminosity affects the number of collisions —
the higher the luminosity, the more particles are likely to collide.
“Beam intensity is key to the success of the LHC, so this is a very
important step,” said CERN Director General Rolf Heuer.
“High intensity means more data, and more data means greater
discovery potential,” he said in a statement.
The new record measured a level of luminosity of 467,000 billion
billion billion — 467 followed by 30 zeros — per square centimetre per
second, which corresponds to several million particle collisions per
second.
Enhanced power boosts the odds of identifying extremely rare
sub-atomic particles, especially the elusive Higgs boson, or ‘God
particle’. Earlier experiments have found most of the tiny and ephemeral
matter predicted by the so-called Standard Model of particle physics —
except the Higgs boson.
Many scientists believe only the 27-kilometre (16.8-mile),
3.9-billion-euro (5.2-billion-dollar) LHC may be powerful enough to
detect it.
The current run of LHC experiments is set to continue through 2012,
by which time it should be possible to determine if the Higgs boson
truly exists, CERN said. “There’s a lot of excitement at CERN today, and
a tangible feeling that we’re on the threshold of new discovery,” said
Serge Bertolucci, CERN’s Director for Research and Scientific Computing.
So far, CERN has cranked the cathedral-sized machine up to energy
levels of 7.0 trillion electronvolts (TeV), or 3.5 TeV per beam, more
than three times the level attained by any other accelerator. It is
aiming to trigger collisions at 14 TeV — equivalent to 99.99 percent of
the speed of light — in the cryogenically-cooled machine after 2011.
At full throttle, the collisions should create powerful but
microscopic bursts of energy that mimic conditions close to the Big
Bang.
AFP
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