Reading aloud Two years ago, the first particle collisions at the Large Hadron Collider LHC started a journey of discovery into largely unmapped regions of nature. The world machine is supposed to solve some of the biggest puzzles in physics: What happened during the Big Bang? what is the mysterious dark matter in the cosmos? Why do elementary particles have a mass at all? In search of answers to these questions, the Large Hadron Collider LHC in Geneva has been firing hydrogen and lead nuclei with unprecedented energy for exactly two years now. This allows researchers to create new particles and reproduce conditions shortly after the Big Bang. Since November 23, 2009, the detection equipment of CERN (European Organization for Nuclear Research) has registered nearly one quadrillion nuclear collisions in Geneva. The world's largest particle accelerator surpasses all expectations: it is the largest machine ever built for research. The annular particle accelerator has a circumference of almost 27 kilometers and runs in an underground tunnel 50 to 175 meters deep below the Franco-Swiss border near Geneva. In the LHC (Large Hadron Collider), protons or lead ions are accelerated and fired head-on at nearly the speed of light. With these collisions, physicists want to get closer to the big bang than ever before: In the short term it will be the particle crashes? in a tiny space? about 100, 000 times hotter than in the center of the sun; the LHC offers the hottest place in the galaxy.
The concentrated energy of the collisions causes a rain of new particles. In this particle hail researchers are peeking for previously undiscovered particles and phenomena. House-sized detectors in huge underground halls record the collisions. The questions that the 10, 000 scientists from all over the world have, one of them in the song? The Large Hadron Rap? processed:
The second anniversary of the first collisions in the LHC is celebrated by institutes throughout Germany with the "Day of the World Machine". From Science Slam to exhibitions, lectures and masterclasses? With many different actions, scientists explain what happened in the last two years at the LHC and what they expect from the future. The program with the individual venues is available at www.weltmaschine.de. display
Previous reports on the particle accelerator
Factory for black holes
Researchers point out the harmlessness of the black mini-holes
Time machines in miniature format
Researchers catch antimatter for the first time
Antimatter in the trap
SUSY, Higgs and Technicolor, bdw 05/2004
Big Bang on Earth, bdw 09/2007
When space was fluid, bdw 02/2009
Also read from the middle of December in the January issue of bild der wissenschaft "The world machine comes up to speed"!