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Further discussions at Cern

For many years, planned, ten billion francs expensive and accompanied by a large group of scientists: the new particle accelerator at Cern sets its own standards. Thomas Häusler looks back at the events of September 10, 2008th



Wednesday was the big day was set as the Large Hadron Collider (LHC) at CERN for the first time in operation. Thereafter, but only started the actual work for the researchers at CERN. As it was at CERN for the "First Beam Day" on? Cern scientists Rüdiger Schmidt in conversation with Patrik Tschudin.




gabs a lot of applause and great rejoicing when the proton beam at CERN by circling the 27-kilometer ring. But why it was installed under the floor about 10 billion francs? The physicist John Ellis knows the answer: it is about nothing less than to answer the question: What has made the world?




At Cern thousands of researchers are employed. Striking: You meet a lot of young researchers. The doctoral Gersaweck Marco Büchel and Angela are part of the young generation. At the start Wednesday also were there.

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After the storm: The press empties

Countless croissants, coffee and sandwiches later: The Press and the Globe is emptying. The Turkish and Japanese colleagues are still there, RAI is already gone and Radiotelevisión Española cuts one last TV report. After the big event, it seems that most journalists (we eingschlossen!) To look forward to a real dinner.

To again briefly on the LHC as a media event to come back: never was a particle accelerator with such a large media presence into operation. This requires a professional organization - was also confirmed: the information came promptly and it was several times the opportunity to ask questions to ask. Not to mention all the time, there was a risk that the LHC will start failed and moved. Then the 250 media representatives had not had much to report.

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What happens next?

Lyn Evans and Jon Engelen just gave information on how to proceed at Cern. Next, try to let the proton beam 50 to 100 times circulate in the ring, then the beam will be accelerated in order to reach high energies. Then then, many detailed measurements and the beam and the detectors are set correctly.

And when are for now the first collisions take place? Science editor Thomas Häusler has contacted Lyn Evans. "As fast as possible" - Patrik Tschudin has taped the conversation.

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computer at Cern: Distributed computing power

The shoot protons through the accelerator, everything goes as planned. What is often forgotten: In the background are countless computer busy to process the data produced by the detectors. And this enormous task is for the most part not even addressed at Cern: 80 percent of the computing power of computers around the world provided that through a so-called " Grid " are connected to the CERN.

Wolfgang von Rueden (Left), head of CERN's IT department explains in conversation with Martin Heule the dimensions of the computer hardware and data.

Hear:

Link: Worldwide LHC Computing Grid

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Thank God for this day!

Over a one-hour information, the LHC team once again the complexity of the whole project emphasized and described it as unprecedented feat of engineering. It is becoming more clearly delighted - not only on the results of the present day but also throughout the course of the LHC Project. This Project has raised the global scientific cooperation in one or the unprecedented step further, the committee said. And project manager Giorgio Brianti announced with a smile: "I thank god that I lived long enough to see this day".

Then there was the possibility to ask questions: "What about the states that are not part of the CERN also benefit from this project?" asked a journalist from Brazil. The answer came immediately: All results are made available to the entire world for free, certain techniques and new developments, however, be patented. "And what about the Higgs particle?" repeated a British journalist probably the most asked question. Again, it was of Page Cern's stresses that you are very confident with the LHC to find something that is responsible for the mass of particles - whether it's "Higgs" is called or not. Unfortunately, the question and answer session interrupted much too soon and the question of an Italian colleague, whether such an enormous "intellect" investments, such as the LHC or the Human Genome project pay off at all, not satisfactorily answered.

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Continue

Steve Myers has just said that expectations were exceeded by far the CERN, everything was functioning better than expected. Myers added that a defective compressor caused the problems with the cooling system, the morning and again this afternoon occurred are.

Meyers also announced the way forward: the moment one tries to make the two beams circulating at the same time - not just 2 or 3 times, but several thousands of times. The energy will then be raised constantly. Then it should take place first collisions.

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Done: The second beam reaches its target

The second proton beam has just circles the entire ring. The procedure lasted exactly one hour - much less than the researchers had expected at CERN. Now we try to keep the beam in the accelerator.

As you can see on the screen, the joy in the LHCb control room seems to be enormous. The skepticism about the success of the LHC starts that morning was still palpable seems to have vanished for ever.

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The second beam road is

was 15 minutes ago launched the second beam in the particle accelerator. How to report straight from the control room, one is currently reached the absorber block 6, where the beam stopped was obvious. It is still not clear why the beam was stopped. need to be made some adjustments to the optics, as the beam oscillates at the moment too much. Then, the protons continue on their way counter-clockwise.

Roger Bailey has just stated that the second jet has reached the CMS detector.

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First images of ATLAS

Just first images and animations from the ATLAS detector have been published.

Link: ATLAS Images

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Update: The jet off

Rüdiger Schmidt at Cern has just informed about the current status of the LHC. The proton beam is turned off right now, as minor problems are problems with the cooling system. The cooling system ensures that the huge magnets that keep the beam on the circular path, not too hot. Only a difference of 0.2 degrees Celsius is tolerated, which has now been reached.

In about 10 minutes we will also try to start the second proton beam in the opposite direction. Further stated Schmidt, that the first jet circled the ring this morning until now has only three plays. Before you can attempt to circulate the beam continuously, even some settings must be made. Schmidt expects that this will be during the evening so far.

Schmidt also stressed that it is still months, if not even take years before one can use the particle accelerator fully.

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is an equation for the whole universe

Even the day you see people wandering around the Globe with this t-shirt - for example, the physicist John Ellis (by the way: he seems to now the most sought Interlocutor to be).

What is behind the equation? Nothing less than the whole universe, as we learn through this flyer .

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tour of the Globe

happens the moment not very much. CERN has announced the first for 12 clock the next press conference. Most journalists are busy preparing the noon news. So at this point (almost as an interim program) a short, shaky tour of the Globe.

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joy in the control room: The beam has circumnavigated the ring

It is faster than expected, has just the jet circled the 27-kilometer ring. If the beam stable, it will soon try to start the second beam in the opposite direction. Just been told that even with the CMS and ATLAS experiments everything works according to plan.

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The beam is in the sector 6

is just the beam in the sector 6 arrived. In our press we are delighted - any distance of the blocks will be celebrated with applause. LHC project leader Lyn Evans has just announced that the beam will circulate in about an hour.

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The beam inside

was just passed into the beam in the LHC. The beam is then stopped short, and removed the first block so that he can get into the first eighth of the ring.

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The sequence

Currently, the proton beam at the entrance of the LHC. There are still all over the LHC ring "locks" (so-called "absorber blocks) is installed, which will now be removed gradually. When the detectors have to once again making adjustments. After removal of the eighth and last stop should the proton beam circulating in the end. The last particle accelerator LEP this procedure took some 12 hours. If all goes according to plan, it should be done at the LHC much more quickly. When exactly, CERN can not quite say.

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Everything ready

Just a few minutes, then begins the briefing. CERN informed again on the exact course of the LHC starts. Just added the music used: Fat Boy Slim - Right here, right now.

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The false control room

specifically for today's media event you've built up in the press a small LHC control room. The hosts are focused at work. But: is controlled from here, nothing that shows screen images from the correct control centers.

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ready to start before the calm before the storm Globe

is in less than two hours it go. Between 9 and 10 clock, the scientists here at CERN for the first time try to circulate the proton beam in the LHC. We are curious.

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After a few detours, diversions and construction sites in Meyrin, we are still at CERN and have reached our seats in the "Globe " related. It is still quiet. In the control centers (live on screen) it is still trying to test the connections.

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Judging


The countdown is on, the tension is rising: in less than 24 hours, the LHC into operation - if all goes according to plan. And even if it is then still take a while before we know whether the "Higgs boson " exists or not - you can buy it now.

Link:
Particlezoo.net

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CERN Rap: "The LHC is supa dupa fly"

Also, CERN has now his Youtube-Star: Katherine McAlpine alias "Alpinekat. With their rap about the Large Hadron Collider, the 23-year-old physicist soon became the darling of science bloggers and Internet nerds. Instead of convincing the "street-knowledge and large cars, the young science journalist with a good explanatory power and a Fiat Cinquecento with Cern sticker. In under 5 minutes Alpinekat explained in the LHC tunnel, the most important facts you should know about the particle accelerator.

was music at Cern But already before, " Les Horribles Cernettes " - allegedly by his own declaration of a neglected CERN Secretary-founded, that friend would rather the study of elementary particles as the trusted devoted companionship. "Les Horribles Cernettes" was, according to Cern, the first volume with a own website (which even today still looks like at that time).

Les Horribles Cernettes - Collider [Video]
Alpinekat - Large Hadron Rap [download mp3]
Large Hadron Rap: The Lyrics