Particle beams are once again circulating in the world's most powerful particle accelerator, CERN's Large Hadron Collider (LHC). This news comes after the machine was handed over for operation on Wednesday morning. A clockwise circulating beam was established at ten o'clock this evening. The LHC is being used to smash together beams of protons in a bid to shed light on the nature of the Universe. Housed in a 27km-long circular tunnel under the Franco-Swiss border, it is the world's largest machine. The machine was heavily damaged when an electrical fault caused a ton of liquid helium to leak into the tunnel just nine days after it was first launched in September last year. During 14 months of repairs dozens of giant superconducting magnets that accelerate particles at the speed of light had to be replaced. 1 - 14 quadrupole magnets replaced 2 - 39 dipole magnets replaced 3 - More than 200 electrical connections repaired 4 - Over 4km of beam pipe cleaned 5 - New restraining system installed for some magnets 6 - Hundreds of new helium ports being installed around machine 7 - Thousands of detectors added to early warning system GTD engineering has been developing for the last 12 years several of the critical control & command systems in the LHC machine. The most relevant are hereby indicated: · Control System For LHC Cryogenics · Study and design CERN Control Room (CCC) · Control & Interlock System For The SPS Main Power Converters’ · Access Control Surface CERN
