Large Hadron Collider restarts after two-year rebuild

Apr 9, 2015

By Jonathan Webb

The Large Hadron Collider has restarted, with protons circling the machine’s 27km tunnel for the first time since 2013.

Particle beams have now travelled in both directions, inside parallel pipes, at a whisker below the speed of light.

Actual collisions will not begin for at least another month, but they will take place with nearly double the energy the LHC reached during its first run.

Scientists hope to glimpse a “new physics” beyond the Standard Model.

Rolf Heuer, the director-general of Cern, which operates the LHC, told engineers and scientists at the lab: “Congratulations. Thank you very much everyone… now the hard work starts”.

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4 comments on “Large Hadron Collider restarts after two-year rebuild

  • I had the opportunity to tour the Large Hadron Collider facility in 2008, about a month before it was first switched on. Tours are still conducted but they are in high demand and there are waiting lists. I booked from Australia 6 months prior.

    But for a science nerd, it was an experience of a lifetime. Our guide was a Chinese Professor who’s specialty was the chemistry of anti matter. We couldn’t go under ground, but we got to see the engineering, (photo next to a section of the tube) experiments, smaller accelerators. I’ve got a photo standing next to a shoe box size device that produces the protons that eventually enter the LHC. (Got the selfie.) From the shoe box, the proton goes through a 100 metre accelerator, then to a kilometre ring, then to a 7 kilometre ring and finally into the 27 kilometre LHC. Each ring speeds it up some more.

    There is an exhibit at the entrance that was also on the tour. Lots of explanatory stuff. One of the exhibits that will stay with me for life, was a darkened room, that had a wall of LED’s, with detectors, where you sit quietly in the dark, and every time a cosmic ray travels down the wall, the LED’s light up. Nerd heaven.

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    aroundtown says:

    How awesome to have actually been there. I just watched a documentary on the Large Hadron Collider and it really was quite good. I will post a link to the IMDB page for info, it’s called Particle Fever. I didn’t know you could actually visit the site. Very cool indeed.

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  • Everyone I have heard talk about CERN just loves it. It not just getting to play with expensive toys, it is getting to rub shoulders with the brightest people from all over the world. I would have expected a lot more friction. Some one should study CERN from a political point of view to see what they are doing right.

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  • I don’t think there is a need for any study. Generally the brightest people are not only irreligious but don’t suffer from religions companion mental illness of nationalism.

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