LHC

MoEDAL becomes LHC’s seventh experiment

As reported from CERN 12th May 2010

The MoEDAL experiement inside the LHCb VELO cavern.

MoEDAL collaboration.

MoEDAL is the newest of the experiments that will investigate particle collisions at the Large Hadron Collider. Approved by the CERN Research Board in December, the MoEDAL experiment will search for very specific exotic particles.

The experiment is relatively small, cheap and quick to install but its physics potential is huge. The MoEDAL detector will consist of layers of plastic attached to the walls and ceiling of the cavern that houses the VELO detector of the LHCb experiment. Physicists will look for tell-tale collinear ‘etch-pits’ created by a stable particle such as a magnetic monopole or a massive stable supersymmetric particle crossing through the plastic.

The international MoEDAL collaboration, made up of physicists from Canada, CERN, the Czech Republic, Germany, Italy, Romania and the US, have already installed the first square metre of plastic in the LHCb cavern and are preparing to deploy the rest of the detector during the next planned long shutdown of the LHC, which will start late in 2011.

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Friday, May 28th, 2010 CERN Comments Off on MoEDAL becomes LHC’s seventh experiment

Large Hadron Collider (LHC)

The LHC is back up and running- sorta! It may take 1-3 years (can you say 2012?) before we know some of the critical information that the LHC, in Cern, can tell us. Evidence of supersymmetry, the idea that every particle has a “super partner” with similar properties in a quantum dimension (according to some physics theories, there are hidden dimensions in the universe), could be discovered one way or the other before 2012.

“The LHC is back,” the European Organization for Nuclear Research announced triumphantly Friday, as the world’s largest particle accelerator resumed operation more than a year after an electrical failure shut it down.

Restarting the Large Hadron Collider — the $10 billion research tool’s full name — has been “a herculean effort,” CERN’s director for accelerators, Steve Myers, said in a statement announcing the success. Experiments at the LHC may help answer fundamental questions such as why Albert Einstein’s theory of relativity — which describes the world on a large scale — doesn’t jibe with quantum mechanics, which deals with matter far too small to see.

Of course, quantum physics is standing most scientists on their heads these days. 🙂

Physicists established a circulating proton beam in the LHC’s 17-mile tunnel at 10 p.m. (4 p.m. ET) Friday, CERN said, a critical step towards getting results from the accelerator. “It’s great to see beam circulating in the LHC again,” said CERN Director General Rolf Heuer. “We’ve still got some way to go before physics can begin, but with this milestone we’re well on the way.”

Located underground on the border of Switzerland and France, the LHC has been inching towards operation since the summer. It reached its operating temperature — 271 degrees below zero Celsius — on October 8 and particles were injected on October 23. Now that a beam is circulating, the next step is low-energy collisions, which should begin in about a week, CERN said. High-energy collisions will follow next year.

Might we create a “black hole” with this monster? Doubtful, but then, who knows anything for sure these days?

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Tuesday, May 18th, 2010 CERN 1 Comment

Cern LHC the Large Hadron Collider is a success

With over three hours of stable and colliding beams, the Large Hadron Collier image of the day

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Tuesday, March 30th, 2010 Articles Comments Off on Cern LHC the Large Hadron Collider is a success

Beams collided at 7 TeV in the LHC

Geneva, 30 March 2010. Beams collided at 7 TeV in the LHC at 13:06 CEST, marking the start of the LHC research programme. Particle physicists around the world are looking forward to a potentially rich harvest of new physics as the LHC begins its first long run at an energy three and a half times higher than previously achieved at a particle accelerator.

“It’s a great day to be a particle physicist,” said CERN Director General Rolf Heuer. “A lot of people have waited a long time for this moment, but their patience and dedication is starting to pay dividends.”

Read the full press release from CERN

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Tuesday, March 30th, 2010 Articles Comments Off on Beams collided at 7 TeV in the LHC

LHC first attempt for collisions at 7 TeV

Today is a historical day at the LHC which marks the start of the first attempt for collisions at 7 TeV (3.5 TeV per beam).

Webcasts are available until 18:15 (Central European Summer Time – CEST). The main webcast will include live footage from the control room for the LHC accelerator and from the control rooms of the four main LHC experiments: ALICE, ATLAS, CMS and LHCb.

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Tuesday, March 30th, 2010 Articles Comments Off on LHC first attempt for collisions at 7 TeV

LHC sets new record – accelerates beam to 3.5 TeV

CERNGeneva, 19 March 2010. At just after 5:20 this morning, two 3.5 TeV proton beams successfully circulated in the Large Hadron Collider for the first time. This is the highest energy yet achieved in a particle accelerator, and an important step on the way to the start of the LHC research programme. The first attempt to collide beams at 7 TeV (3.5 TeV per beam) will follow on a date to be announced in the near future.

“Getting the beams to 3.5 TeV is testimony to the soundness of the LHC’s overall design, and the improvements we’ve made since the breakdown in September 2008,” explained CERN’s Director for Accelerators and Technology, Steve Myers. “And it’s a great credit to the patience and dedication of the LHC team.”

Read the full article here

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Friday, March 19th, 2010 Articles Comments Off on LHC sets new record – accelerates beam to 3.5 TeV

The Voltaire Lecture 2010 by Professor Brian Cox

Professor Brian Cox speaks on “The value of Big Science: CERN, the LHC and the exploration of the Universe”

6th April 2010

Chaired by Polly Toynbee, President of the British Humanist Association.

Professor Brian Cox holds a chair in particle physics at the University of Manchester and works on the ATLAS experiment at the Large Hadron Collider, CERN near Geneva.

Full details and tickets available here

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Friday, March 12th, 2010 Articles Comments Off on The Voltaire Lecture 2010 by Professor Brian Cox

Lhc – Quarks, Big Bang and Large Hadron Collider (LHC)

People are curios. Curiosity is one of the key elements that drives humanity towards the answers about our existence and our future. Since ancient times people have asked themselves about the origins of everything. From universe to the basic elements of the matter. Some people many thousands years ago assumed that if you divide some piece of matter this division must come to an end. This process should end with the basic, indivisible elements that constitute matter–atoms.

In the last centuries many experiments have confirmed that the matter is indeed consisted of some small particles. Scientific approach has contributed to the discovery of various natural and synthetic substances, molecules, chemical elements and atoms. Atoms, once believed to be indivisible, were also found to have some hard nucleus with electrons orbiting around it. Then it was discovered that the atom nucleus is consisted of protons and neutrons. So the atoms are divisible. This fact had many consequences. One of them with the most notable effect is fission nuclear bomb. However, the division story didn’t end there. Protons and neutrons were also found to contain some smaller particles–quarks.

Currently the list of all elementary particles is pretty long. This list is part of the Standard model–a model of how everything exists and interacts. It is believed that this model is not the final picture of the universe. There are still some unanswered questions. On the other hand, the universe itself is a subject of investigation. One of the key discoveries was that the universe is expanding. From this fact we can conclude that in the past the universe was smaller. The more we go into the past, the smaller it was. Sooner or later we come to the moment in time where the universe was infinitely small. This is called the Big Bang–the moment when the universe started to develop as we know it today, some 13.7 billion years ago. This is now the leading theory about the evolution of the universe. It is still unknown what banged, how and why.

The latest project to find some missing answers is the Large Hadron Collider (LHC) in CERN, Geneva. It is a giant ring 100 meters under ground where two beams of particles close to light speed will collide. Each collision will produce an enormous amount of other particles. Analysis of this debris will hopefully answer some questions about the nature of particles or even bring some new ones. Because of enormous collision energy (about 14 TeV) the circumstances will be close to the situation immediately after big bang. The LHC project is currently the largest and the most expensive scientific project.

Answering questions about micro and macro world will not only satisfy our curiosity but will also help us to understand the world. If we understand the world then we can make it better. And better world is a dream of everybody.

Article Source: http://EzineArticles.com/?expert=Jan_Pascal

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Thursday, March 11th, 2010 Articles Comments Off on Lhc – Quarks, Big Bang and Large Hadron Collider (LHC)