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After 180 days of operation and 400 trillion proton-proton collisions, the operating cycle of the LHC in 2011 came to an end at 17:15 pm on 30 October. In its second year of operation, the LHC team has exceeded its operational objectives.
(The magnificent performance of the LHC has forced upward revision of data to achieve objectives in 2011)
After 180 days of operation and 400 trillion proton-proton collisions, the operating cycle of the LHC in 2011 came to an end at 17:15 pm on 30 October. In its second year of operation, the LHC team has exceeded its operational objectives, constantly increasing the speed at which the LHC has provided the data to the experiments.
At the beginning of the year, the goal for the LHC was to accumulate an amount of data that physicists call a reverse femtobarn during 2011. The first reverse femtobarn was reached June 17, leaving the LHC experiments in a good position ahead of the major scientific conferences and forcing Summer to revise the target upward to acquire data in 2011 to 5 femtobarns inverse . This milestone was achieved on 18 October, with a total for the year of nearly six femtobarns reverse delivered to each of the two major LHC experiments, ATLAS and CMS .
“At the end of the operating cycle with protons of the LHC this year has reached cruising speed,” said Accelerators and Technology Director of CERN , Steve Myers.
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Scientific experiments largest particle accelerator in the world will present analysis restricting the search for Higgs boson at the conference of high-energy physics in Grenoble (France). The discovery or exclusion of this particle, the missing piece of the Standard Model involve new challenges for the LHC.
The first major particle physics conference begins today in Grenoble (France). All presented results of the LHC experiments and is scheduled a news conference for Monday July 25. This conference follows a successful start of LHC operation in 2011, and the results are awaited with anticipation. “So far we have collected the amount of data planned for around 2011, which is a great achievement for the LHC,” said Rolf Heuer, general director of CERN (European Organization for Nuclear Research). “While it is too early for major discoveries, experiments, interesting results have already accumulated.”
The LHC experiments will be presented more accurately measures up to the date of known processes of the present model of particle physics, the Standard Model. Also provide unprecedented measures and limits on phenomena and particles like the Higgs boson.
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The cleaning phase was completed Wednesday, April 13. More than 1000 packets per beam were then circulated with success at 450 GeV. Measurements have confirmed the disappearance of electron clouds in the cold parts of the machine. Moreover, in the hot, there was an improvement empty, Showing that phase cleaning again gave the expected results. The cleaning phase was achieved by injecting packets of high intensity spaced 50 nanoseconds. Given the performance in terms of brightness it is possible to achieve with this spacing (Increased number packet and their intensity at the exit of the injectors) and given the results of the cleanup phase, it was decided to continue operation in 2011 with the same interval between packets.
Before resuming normal operation, some issues related to the spacing of 50 nanoseconds have been resolved. It could then send to the experiences of stable beams, initially consisting of 228 packages and 336 packages. Sunday, April 17, in the morning, operating with 336 packets has achieved a new record brightnessOr 3.7 x 1032 cm-2s-1, and an integrated luminosity of 10 pb-1 in 9 hours. The integrated luminosity recorded at this day by the LHC in 2011 is higher than 62 pb-1, far exceeding the total value reached in 2010, 49 pb-1.
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Scientists from DZero experiment, the Tevatron particle accelerator at Fermilab (USA) have discovered evidence of an asymmetry between matter and antimatter more significant than predicted by current theory. The results, sent to the magazine Physical Review DIndicate that there is a difference of 1% in the production of muon pairs and pairs of antimuon in the decay of B meson pairs, which is 50 times more than predicted by the Standard Model.
This is the first step that shows a significant deviation from the theoretical predictions about differences in behavior between matter and antimatter, a study may be supplemented with experiments for the Large Hadron Collider (LHC).
Explains Fermilab today through a statement, the dominance of matter seen in the universe is possible only if there are differences in behavior between particles and antiparticles (which have the same mass and spin and spin, but different electric charge) . Although physicists have spent decades observing these differences (called CP violation), they are too small to explain the predominance of matter over antimatter.
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The Institute of Physics, Corpuscular (IFIC, joint center of the Higher Council for Scientific Research and the University of Valencia) hosts 13 and May 14 meeting of scientific committee of the International Linear Collider (ILC), a particle accelerator still under design that will complement the research on the nature of matter that are performed in the Large Hadron Collider (LHC).
It is the first time that Spain hosts meeting of this kind, as a preparation and evaluation of the design of new accelerator and which address issues such as collaboration between this project and developed by the European Laboratory for Particle Physics (CERN).
The ILC is the first global project for the construction of a particle accelerator. It has the participation of major research centers in this area: in addition to CERN, other laboratories involved are DESY (Germany), Fermilab and SLAC (U.S.) and KEK (Japan). On the Spanish side, IFIC investigator Juan Fuster is the European representative on its executive committee. The Spanish centers already working in the design of this new accelerator and associated detectors are the IFIC, the Institute of Physics of Cantabria (IFCA, CSIC-Universidad de Cantabria), the Centre for Energy, Environment and Technology (CIEMAT); National Microelectronics Centre (CNM-IMB-CSIC) and the Universities of Barcelona, Ramon Llull and Santiago de Compostela.
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Six accelerators and more km lines connecting them lead particles at the LHC. Again, this is complexity prevailing: the particles are produced, prepared in packets, synchronized and delivered at the LHC at the exact moment where he can receive. In other words, there are collisions after the chain All injectors should work perfectly.
A question often posed by those among the many visitors to CERN: “Why the LHC is it not directly connected with the source of protons?”. In other words, how is it useful to have a chain of accelerators to serve as an injector?
Before colliding in the LHC, the particles move in advance in at least six different accelerators: the source duoplasmatron 90 keV to 750 keV the RFQ, Linac 2 of 50 MeV, the Source injector (PS Booster “or PSB) of 1.4 GeV proton synchrotron (PS) 25 GeV, and finally the Super Proton Synchrotron (SPS) of 450 GeV.
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On March 30, 2010 have been produced in particle collisions at LHC energies never before achieved. This scientific event opens the door to new discoveries of physics and may revolutionize our understanding of matter and the universe. The collisions have been performed at CERN, near Geneva (Switzerland) and SINC has been there to tell it.
It is seven in the morning. Sunrise at the CERN, the European Organization for Nuclear Research, better known today as the European Laboratory for Particle Physics. Some physicists do not like the trend to remove the “nuclear” from the name of your institution.
The taxi brought me from Geneva, about nine miles from here, and after surrounding the construction of the access road leaves me in the reception center. A small group of journalists accreditation confirmed for the event today: “LHC Physics First.” This is the first collisions at an energy of 7 teraelectronvoltios (TeV) in the LHC, the Large Hadron Collider. He has never reached this energy range.
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Teresa Rodrigo (Lerida, 1956), Professor of Physics Atomic, Molecular and Nuclear Physics at the University of Cantabria and researcher at the Institute of Physics of Cantabria (IFCA), now works at the Large Hadron Collider (LHC) at CERN near Geneva . The scientist has just been named chair of the Collaborative Council of the CMS detector. In the control center of this experiment, the researcher spoke SINC yesterday, when the LHC got more energy collisions between particles (7 teralectronvoltios).
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The giant particle accelerator LHC at the European Organization for Nuclear Research (CERN) in Geneva, one of the most anticipated beginning of scientific experiments of all time. Physicists are trying to mimic conditions in the very early universe. After initial problems was an experiment running at full speed.
In the 27 km long LHC tunnel two circles facing each proton beams accelerated to nearly the speed of light, which gives each of them 3.5 teraelektronvoltů Energy (TeV). Today is the first time, path follows the energy-rich rays met and particles collide at 7 TeV total energy. Nothing like this was in the older and less powerful accelerators possible.
Operators have the accelerator this morning stability problems with the proton beam in the morning had to restart the LHC. Re-accelerate protons, however, went without problems, and about one o’clock in the afternoon, CERN announced that the detectors marked the first collision.
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The Large Hadron Collider is now commonly used with circulating beams at 3.5 TeV, The highest energy ever reached in a particle accelerator, CERN was able to set a date for launching the program search LHC: the first trial collisions at 7 TeV (3.5 TeV per beam) is scheduled for March 30.
“With two beams at 3.5 TeV, we prepare to launch the physics of the LHC,” said Steve Myers, head of accelerators and Technology. “But we still have much work before obtaining collisions. Align the beam itself is already a challenge: it means just throwing needles across the Atlantic and bring them into collision mid-term. ”
By 30 March, the team will work with the LHC beams at 3.5 TeV in order to service the systems of control beams and the systems protecting the particle detectors parasites. Before the collisions can occur, these systems must be fully commissioned.
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(The magnificent performance of the LHC has forced upward revision of data to achieve objectives in 2011)
The first major particle physics conference begins today in Grenoble (France). All presented results of the LHC experiments and is scheduled a news conference for Monday July 25. This conference follows a successful start of LHC operation in 2011, and the results are awaited with anticipation. “So far we have collected the amount of data planned for around 2011, which is a great achievement for the LHC,” said Rolf Heuer, general director of CERN (European Organization for Nuclear Research). “While it is too early for major discoveries, experiments, interesting results have already accumulated.”