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Wednesday, October 1, 2008

Large Hadron Collider experiment


SCIENCE

Heart of the matter
R. RAMACHANDRAN, Frontline, Volume 25 - Issue 20 :: Sep. 27-Oct. 10, 2008
The Large Hadron Collider experiment ushers in a new era of scientific probe into the mystery of the universe.


COURTESY: CERN 

One of the first images from the Compact Muon Solenoid, one of the six experiments of the LHC, shows the debris of particles picked up in the detector’s calorimeters and muon chambers after the first beam on September 10 was steered into the collimator (tungsten block).

SEPTEMBER 10 is a red-letter day for physicists around the world. Though a couple of years overdue in coming, the stage was set on that date for the beginning of the largest and costliest ever international scientific experiment, which was 14 years in the making, involving nearly 9,000 physicists from 60 countries and about $8 billion at the European Centre for Nuclear Research (CERN) in Geneva.
The first particle beams were injected into what will be the most powerful particle accelerator and steered around the full 26.659 km circumference of this ringed underground machine in both clockwise and anticlockwise directions. Called the Large Hadron Collider (LHC), the accelerator lies at an average depth of 100 metre in a 3.7 m diameter tunnel straddling the Swiss-French border near the Alps. To bring down the cost considerably, the LHC is reusing the tunnel that housed the previous high-energy accelerator, the Large Electron-Positron (LEP) collider. The LEP was shut down in 2000.  more 


Extraordinary Machine 



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