Wednesday, September 10, 2008
Turning on the Large Hadron Collider, CERN begins a new era of particle physics.
By Katherine Bourzac
The biggest physics experiment in history started up early this morning. At 4:27 A.M. eastern time, two proton beams made their first laps around the 27-kilometer tunnel of the Large Hadron Collider (LHC) outside Geneva. By late fall, once the behemoth has gotten warmed up, physicists at CERN hope to achieve particle collisions with an energy of five trillion electron volts; eventually, they'll bump it up to seven trillion. As Nobel laureate and MIT Institute Professor Jerome Friedman wrote in our May/June issue, these collisions should help answer some of physics's most fundamental questions: Why do particles have mass? Are there spatial dimensions beyond the ones we know? There will also likely be some surprises, if history is a guide.
But today's switch-on, though momentous, was only the first step--what the New York Times this morning compared to turning on a car engine for the first time. That's because this car needs to rev particles to near the speed of light, at temperatures near absolute zero. For a look at the immense and gorgeous inner workings of the accelerator, see our photo essay.
Massachusetts Institute of Technology
Comments
phoenix
09/11/2008
Posts:172
steveDH
09/11/2008
Posts:8
So, just counting at the current costs, we could have built about 50 LHCs. So every state in America could have had its own LHC...and there would be money left over.
gabrielg01
09/12/2008
Posts:361
Islam died, too. Without anyone firing a shot, all the shamed men in those parts of the world simply went on and did other things, and the dinosauric Beast got tired, laid down and never got up again. It died. Cool !!
I mean, who'd ever believe the world could've become a better place as easy as that?
mergatroid
09/13/2008
Posts:20
z0rr0
09/15/2008
Posts:48
mergatroid
09/16/2008
Posts:20
mergatroid
09/18/2008
Posts:20