Large Hadron Collider to run at 4 TeV per beam in 2012

Feb 14, 2012
Large Hadron Collider. Image courtesy of CERN.

( -- CERN today announced that the Large Hadron Collider will run with a beam energy of 4 TeV this year, 0.5 TeV higher than in 2010 and 2011. This decision was taken by CERN management following the annual performance workshop held in Chamonix last week and a report delivered today by the external CERN Machine Advisory Committee (CMAC). It is accompanied by a strategy to optimise LHC running to deliver the maximum possible amount of data in 2012 before the LHC goes into a long shutdown to prepare for higher energy running. The data target for 2012 is 15 inverse femtobarns for ATLAS and CMS, three times higher than in 2011. Bunch spacing in the LHC will remain at 50 nanoseconds.

“When we started operating the LHC for in 2010, we chose the lowest safe consistent with the physics we wanted to do,” said CERN’s Director for Accelerators and Technology, Steve Myers. “Two good years of operational experience with beam and many additional measurements made during 2011 give us the confidence to safely move up a notch, and thereby extend the physics reach of the experiments before we go into the LHC’s first long shutdown.”

The LHC’s excellent performance in 2010 and 2011 has brought tantalising hints of new physics, notably narrowing the range of masses available to the Higgs particle to a window of just 16 GeV. Within this window, both the and CMS experiments have seen hints that a Higgs might exist in the mass range 124-126 GeV. However, to turn those hints into a discovery, or to rule out the Standard Model Higgs particle altogether, requires one more year’s worth of data. The LHC is scheduled to enter a long technical stop at the end of this year to prepare for running at its full design of around 7 TeV per beam.

“By the time the LHC goes into its first long stop at the end of this year, we will either know that a Higgs particle exists or have ruled out the existence of a Standard Model Higgs,” said ’s Research Director, Sergio Bertolucci. “Either would be a major advance in our exploration of nature, bringing us closer to understanding how the fundamental particles acquire their mass, and marking the beginning of a new chapter in particle physics."
The schedule announced today foresees beams back in the LHC next month, and running through to November. There will then be a long technical stop of around 20 months, with the restarting close to its full design energy late in 2014 and operating for physics at the new high energy in early 2015.

Explore further: X-rays probe LHC for cause of short circuit

add to favorites email to friend print save as pdf

Related Stories

Large Hadron Collider sets world record beam intensity

Apr 22, 2011

( -- Around midnight this night CERN's Large Hadron Collider set a new world record for beam intensity at a hadron collider when it collided beams with a luminosity of 4.67 x 1032cm-2s-1. This exceeds the previous world ...

LHC experiments eliminate more Higgs hiding spots (Update)

Aug 22, 2011

( -- Two experimental collaborations at the Large Hadron Collider, located at CERN laboratory near Geneva, Switzerland, announced today that they have significantly narrowed the mass region in which the Higgs ...

Large Hadron Collider 7 TeV experiment on March 30

Mar 23, 2010

( -- With beams routinely circulating in the Large Hadron Collider at 3.5 TeV, the highest energy yet achieved in a particle accelerator, CERN has set the date for the start of the LHC research ...

CERN continues the hunt for the Higgs

Jan 31, 2011

( -- It has just been decided that CERN will run for the next two years without a break. The Higgs could be within reach sooner than previously thought so all researchers are keen to continue t ...

Recommended for you

X-rays probe LHC for cause of short circuit

Mar 27, 2015

The LHC has now transitioned from powering tests to the machine checkout phase. This phase involves the full-scale tests of all systems in preparation for beam. Early last Saturday morning, during the ramp-down, ...

New insights found in black hole collisions

Mar 27, 2015

New research provides revelations about the most energetic event in the universe—the merging of two spinning, orbiting black holes into a much larger black hole.

Swimming algae offer insights into living fluid dynamics

Mar 27, 2015

None of us would be alive if sperm cells didn't know how to swim, or if the cilia in our lungs couldn't prevent fluid buildup. But we know very little about the dynamics of so-called "living fluids," those ...

Fluctuation X-ray scattering

Mar 26, 2015

In biology, materials science and the energy sciences, structural information provides important insights into the understanding of matter. The link between a structure and its properties can suggest new ...

Hydrodynamics approaches to granular matter

Mar 26, 2015

Sand, rocks, grains, salt or sugar are what physicists call granular media. A better understanding of granular media is important - particularly when mixed with water and air, as it forms the foundations of houses and off-shore ...

User comments : 5

Adjust slider to filter visible comments by rank

Display comments: newest first

5 / 5 (1) Feb 14, 2012
wow -- if i am not mistaken : and i might be : it took Cern a few years to get 1 inverse femtobarn and now we are doing 15 in one yr . wow
2.3 / 5 (6) Feb 14, 2012
wow -- if i am not mistaken : and i might be : it took Cern a few years to get 1 inverse femtobarn and now we are doing 15 in one yr . wow

You have to realize that 13 inverse femtobarns's of it, is porn.
not rated yet Feb 15, 2012
wow that means higgs boson will be found in coming months
2.3 / 5 (3) Feb 16, 2012
The Higgs doesn't exist because the mass is the electric dipole moment.
3 / 5 (2) Feb 16, 2012
Antonio Jose Saraiva

m = e.k /x (1-pi^3.alpha^2 /2)

m-mass or electric dipole moment;e-electron charge;
k-Boltzmann constant (square meter);
x-Compton wavelength; pi=3.1415927;
alpha-fine structure constant

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.