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CERN, 빅뱅 재현 위해 입자 충돌 실험 실시

2009-11-24 오후 12:17:57 게재



요약

스위스 제네바의 유럽원자핵공동연구소(CERN)가, 강입자 충돌기를 가동한지 3일째 되는 날인 지난 23일 입자 충돌에 성공했다고 밝혔다.



연구소는 성명서를 통해 "강입자 충돌기가 두 입자 광선을 동시에 회전시켰고, 이로 인해 입자 간 동기화되는 현상, 즉 프로톤과 프로톤 간의 충돌을 관찰할 수 있었다."라고 밝혔다.



연구소의 Rolf Heuer 소장은 "단기간 안에 큰 성과를 이뤘다. 그러나 강입자 충돌기를 이용한 물리 실험을 하기까진 아직도 많은 시간과 노력이 필요하다."라고 밝혔다.



27km의 원형 터널에 설치된 CERN의 입자 충돌기는, 137억 년전 빅뱅 발생한 직후의 상황을 재현함으로써 우주 탄생의 신비를 파헤치고자 CERN 연구소 과학자들이 제작한 기계이다.



(신화통신, 2009. 11. 24)



’Big Bang’ machine experiences first particle collisions



The world’s most powerful atom smasher on Monday experienced the first collisions of particles, only three days after it was restarted, the European Organization for Nuclear Research (CERN) said.

"Today the Large Hadron Collider (LHC) circulated two (particle) beams simultaneously for the first time, allowing the operators to test the synchronization of the beams and giving the experiments their first chance to look for proton-proton collisions," the Geneva-based organization said in a statement.



From early in the afternoon, the two particle beams were made to cross at four points, and the detectors recorded four collisions, it said.



"It’s a great achievement to have come this far in so short a time," said CERN Director General Rolf Heuer. "But we need to keep a sense of perspective -- there’s still much to do before we can start the LHC physics program."



Housed in a 27-kilometer, circular tunnel at the Swiss-French border near Geneva, the giant machine was designed by scientists to unlock many secrets of the universe by recreating the conditions immediately after the Big Bang which happened some 13.7 billion years ago.



That can only be done by colliding two beams of particles circulating in opposite directions at close to the speed of light.



The machine was restarted on Friday, after more than one year of repairs. It was first started on Sept. 10, 2008, but suffered a serious malfunction only nine days later.



The four small-scale collisions came just three days after the LHC restart, demonstrating the excellent performance of the beam control system, said CERN, the world’s leading laboratory for particle physics.



Since the start-up, the operators have been circulating beams around the ring alternately in one direction and then the other at the injection energy of 450 GeV. The beam lifetime has gradually been increased to 10 hours, and on Monday beams have been circulating simultaneously in both directions, still at the injection energy.



Next on the schedule is an intense commissioning phase aimed at increasing the beam intensity and accelerating the beams. All being well, by Christmas, the LHC should reach 1.2 TeV per beam, and have provided good quantities of collision data for the experiments’ calibrations, CERN said.



(Xinhua, November 24, 2009)