Friday, May 22, 2015

Cern: LHC extraordinary, made the first collision with the power of … – diregiovani

Cern: LHC extraordinary, made the first collisions to the power of 13 TeV. The first images

It ‘still a test, but the LHC physicists call it one of the milestones on the road to the new phase of activity RUN2 . Will, in fact, in these days to check, for example, the stability of the beams, which are more focused than in the past, and the systems of protection of the tracers


INFN – were carried out today, for the first time, collisions at 13 trillion electron volts, 13 TeV, the accelerator in the world’s largest. It is still a test, but the LHC physicists call it one of the milestones on the road to the new phase of activities of the LHC project, the so-called RUN2. This is not a real data taking. Not yet. According to scientists from the LHC, which includes about 700 Italians coordinated by INFN, these collisions are used mainly to prepare the machine for its new course. Will, in fact, in these days to check, for example, the stability of the beams, which are more focused than in the past, and the systems of protection of the tracers.
“The first tests with the beams to 6.5 TeV energy went very well “, he enthuses Anna Di Ciaccio, national coordinator of the ATLAS (A Toroidal LHC Apparatus), which at this time is in the control room experiment to follow the operations. “It’s really exciting seeing the beams circulate this energy to record for hours in the ring and see the first collisions at 13 TeV. In ten days will begin taking data with stable beams to 6.5 TeV and will open a new chapter and certainly fascinating in the history of particle physics, “said Di Ciaccio.







After two years of intensive work of consolidation and several months of preparation for the restart, the Large Hadron Collider (LHC), the most powerful particle accelerator in the world, is back in operation at CERN in Geneva. A first beam of protons has returned to circulate within the underground ring of the LHC, 27km long, followed by a second beam in rotation in the opposite direction. The beams have been circulating energy injection of 450 GeV.

LHC thus enters into its second season of operation (RUN2). Gradually operators of the machine will increase the energy of the beams and, thanks to the work done over the last two years, the LHC will reach unprecedented energy: almost double the first season, that will work to 6.5 TeV per beam (against 3.5 TeV before). The collision energy of 13 TeV are expected before the summer: what will be the moment when the LHC experiments will start to lay their eyes on a “territory” unexplored.
“With the restart of the LHC, the adventure begins, we are leaving behind the Higgs boson, and now opens for us a door to a world we do not know,” said Fernando Ferroni, president of the Institute National Institute of Nuclear Physics (INFN), the body that coordinates the participation of Italy at CERN and the LHC project. “We trust that this new exploration can help us shed some ‘light on the dark components of the universe, but we hope in unexpected surprises … the conditions are the best, so I just have to wish good job in LHC!” Concludes Ferroni .



New Horizons. The more detailed and comprehensive study of the mechanism of Brout-Englert-Higgs gives mass to particles, research on dark matter, the asymmetry between matter and anti-matter and the quark-gluon plasma are the main scientific goals of LHC during of his second season of activities. Researchers will submit as the Standard Model of particle physics to test even more severe, in search of new physics beyond this theory because, although it is now well established and today represents our best description of particles and their interactions, is not however exhaustive.




After the discovery of the Higgs boson, now we do not know what awaits us if the new findings are behind ‘ angle or if our research will have to push much further. It will definitely be an opportunity to test many of our assumptions: the dark matter, the supersymmetry, the extradimensioni “said Fernando Ferroni, president of the National Institute of Nuclear Physics (INFN), the body that coordinates the contribution of our country firm to LHC. “The restart of the ‘new’ LHC is an achievement of science and technology, in which Italy has a leading role, thanks to the excellence of our researchers and our industry,” said Ferroni.


We often hear about the Large Hadron Collider at CERN in Geneva, at least for the next three years, in the meantime let’s enjoy an exclusive tour plane, made by a drone in collaboration with the laboratory of ALICE ( acronym for A Large Ion Collider Experiment) above the tunnel which houses one of the experiments of particle physics (ALICE) taking place in the structure.



The video shows the huge particle detector that will study the collision of heavy ions in the LHC and analysis of a study of primordial matter known as quark-gluon plasma, which is thought to permeate the Universe after Big Bang.



Meanwhile, the LHC’s engineers are making preliminary tests in view of the injection of two particle beams in experiments ALICE and LHCb, planned by the end of the month. So it will start – after two years of technical stop – a new phase of work of the accelerator, which will bring the machine to operate at an energy about twice that of departure: about 13 trillion electron volts (TeV), just above maximum performance for which the LHC is designed.




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