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On March 19, 2010, shortly after 5 am 20, two beams of protons circulated first successful energy of 3.5 TeV. This is the highest energy ever reached in a particle accelerator, which is an important step toward launching the program search LHC. Next step: a test collision to 7 TeV (3.5 TeV per beam), whose date will be announced shortly.
“Having been able to bear the beams at an energy of 3.5 TeV proves the validity of the overall design of the LHC, and reflects the improvements we’ve made since the crash in September 2008, said Steve Myers, Director of accelerators and Technology. And it’s a credit to the team operating the LHC, whose patience and dedication have been rewarded. ”
The current period of operation of the LHC began November 20, 2009, with a first beam circulation at 0.45 TeV. The events are then chained quickly: November 23, we circulated the two beams, and November 30, it reached a record global energy beam with 1.18 TeV.
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The Initial results of collisions of high energy protons LHC Particle Accelerator first glimpse into the particle physics that occurs in a new frontier of levels energy, after energy reached record values in these experiments.
A team of researchers from MIT, CERN and the Institute of Investigation of Particle and Nuclear Physics in Budapest, Hungary, has completed the first analysis of the results of those collisions. The results show that collisions produced a number unexpectedly high particles called mesons, an event which will to be taken into account when physicists start looking particles rarer and the hypothetical Higgs boson.
This is the very first step on a long road that will make highly sensitive analysis, which can detect particles that only occur in one in one thousand million collisions.
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German Constitutional Court dismissed the complaint unnamed German women, who called for an end his country’s participation in the experiments in the LHC particle accelerator near Geneva. The woman fears that there experiments will lead to the collapse of the world.
Inform the Today newspaper Die Welt. Germans fear the giant accelerator is not unique. Catastrophe many foresaw apokalyptika mainly in August 2008, when the accelerator was put into operation. They feared is that the collisions of elementary particles creates a black hole to swallow the whole Earth.
The court in Karlsruhe, but a complaint based on such concerns dismissed due to lack of evidence. According to him, not enough action based on a general mistrust of physical laws, namely the theoretical argument against modern science. In addition, said applicant has demonstrated sufficiently that the attempt to undermine its fundamental rights.
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At the end of the campaign to improve the reliability of protection system against resistive transitions, current intensity in the main dipoles and quadrupoles of the LHC‘s eight sectors has been increased to 6 kA. Sunday, February 28, the first hours of day .The beams circulating again in the LHC: the period of operation the longest in the history of CERN has just begun!
During the campaign work of the LHC teams in recent weeks to allow the smooth operation of the LHC magnets at a high intensity, the thousands of channels of the new protection system against resistive transitions (QPS) have been checked and resistance of 10 000 connections between the magnets was measured with precision, revealing no abnormality. To operate the LHC without risk to the magnetic system, it should be possible at any time to stop the magnets and extract the energy stored in ten seconds.
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The Large Hadron Collider (LHC) has begun again, as confirmed by the European Laboratory for Particle Physics (CERN) on its website. 2010 The first beam was circulated in both directions of the ring at 04.10 hours on 28 February.
After the stop technique in which the LHC was from last December, returned yesterday to move the first beam of particles at the large collider, CERN, as reported briefly on its website and in the microblogging service Twitter.
The beam has circulated in both directions by the huge ring of 27 km from the LHC, but for now at low power. CERN sources have confirmed to SINC that will be issued an official statement when you reach the 3.5 TeV (teraelectronvoltios) beam.
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Everything You Always Wanted to Know About boson Higgs never dare to ask …
God particle, the origin of the mass of all other particles, the main purpose of the LHC, missing piece of the standard model … These qualifiers are enough to feed number of press headlines and news articles of world whole. However, they do not explain what this really famous particle. CERN in Bulletin part in the theoretical discovery of the Higgs boson before the LHC does so in practice (if it exists!).
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After several weeks of intense work, the short technical stop the LHC is nearing completion. After an intense campaign of repairs and new tests on thousands of high voltage connectors, the system of enhanced protection of magnets is now activated. During this period, the current in the dipole and quadrupole principal will be gradually increased to 6 kA, the level required for collisions of protons at Energy of 7 TeV in the center mass . This step has already been reached for most sectors.
The parameters of the protection system improved magnets are calibrated with precision operation necessary for the protection system of magnets does not fire in case of actual problem. The system is now able to detect the passage of an interconnection cable between two superconducting magnets of the superconducting to the resistive state, which is essential to exploit the magnetic system to more than 2 kA. The resistance of interconnects have been ultra-precise measurements in intensity on a 5 kA.
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The Large Hadron Collider (LHC) will be launched this month at the European Laboratory for Particle Physics (CERN) and work nonstop the next 18 to 24 months. Then stop business for a long period and will operate at higher energy. This has been agreed LHC makers at the meeting held last week in Chamonix (France).
“The most important decision we have made is to operate the LHC from 18 to 24 months at a collision energy of 7 TeV (3.5 teraelectronvoltios beam), then we will make a long stop to perform all work necessary to enable us to achieve provided the collision energy in the LHC, 14 TeV in the next period of operation, “said Steve Myers, head of the CERN accelerators and technologies, following a meeting of scientists at the LHC at Chamonix (France), where a meeting held annually .
“This means,” Myers continued, “that when beams back to move this month by the LHC will enter the longest phase of operation of the accelerator in CERN’s history, we will take until summer or autumn of 2011.
The director recalled in a statement that the LHC, which stopped its activities in late 2009, is unlike any previous machine at CERN: “It is a cryogenic plant, each phase is accompanied by long phases of cooling and heating, and for that reason The traditional operating model of CERN’s running during the summer and winter stop ‘was already in doubt. ”
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