At the beginning of 2013 the LCH stopped its activity, so that engineers could start working on the machine for making it funtioning at higher energies.

You might be wondering what are the improvements they made.

In the link below you can find the details about the new magnets, connections, the more powerful jets of particles, cryogenics, voltage, emptyness, etc. All these features and many more have been upgraded or developed specially for the 2nd run of LHC which starts this year.