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'Big Bang Machine' to start search for elusive 'God Particle' on March 30 | Engineers at CERN have decided March 30 as the date to make their first attempt to collide beams at an energy
of 3.5 trillion electronvolts (TeV) per beam at the Large Hadron Collider (LHC), to begin hunt for the elusive 'God Particle'. The LHC reached this beam energy
last week, breaking its own particle beam energy record. But, among other things,
engineers will need to ensure the beams are stable at 3.5 TeV before trying for
collisions. Charged particles tend to speed up in an electric field, defined as
an electric potential - or voltage - spread over a distance One electron volt
(eV) is the energy gained by a single electron as it accelerates through a potential
of one volt It is a convenient unit of measure for particle accelerators, which
speed particles up through much higher electric potentials. The first accelerators
only created bunches of particles with an energy of about a million eV (MeV).
The LHC can reach beam energies a million times higher: up to several teraelectronvolts
(TeV), This is still only the energy in the motion of a flying mosquito. But that
energy is packed into a comparatively few particles, travelling at more than 99.99%
the speed of light. A magnet fault caused one tonne of liquid helium to leak into
the tunnel in 2008, shortly after the machine was first switched on, requiring
a programme of repairs that lasted 14 months. Between now and March 30, the LHC's
team will be working to commission the beam control systems and the systems that
protect the machine's detectors, or experiments, from stray particles. "All these
systems must be fully commissioned before collisions at 3.5 TeV can begin," according
to CERN. "Getting beams circulating is one thing. Having them circulate for a
reasonable lifetime is another. Having a 'golden orbit' - where the beams complete
lap after lap after lap for hours - is important," Dr Gillies told BBC News. "All
of these things you have to do before the machine operators can say: 'the beams
are now stable, you can switch on the detectors'," he said. The LHC will search
for the elusive Higgs boson, dubbed the "God particle" because of its importance
to our understanding of physics. At allotted points around the LHC tunnel, the
proton beams cross paths, allowing particles to smash into one another. Detectors
located at the crossing points will scour the wreckage of these collisions for
discoveries that extend our knowledge of physics.
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