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2015 at CERN in pictures

2015: the year that saw the restart of collisions at the world’s largest particle accelerator and the return of the particle hunters to their lookouts

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2015: the year that saw the restart of collisions at the world’s largest particle accelerator and the return of the particle hunters to their lookouts. We take a look back at some of the year’s highlights at CERN.

January

LHC Key,LS1,LHC run2,LHC
(Image: Maximilien Brice/CERN)

February

  • The final preparations are made for the restart of the world’s largest particle accelerator and its experiments. CMS installs a new detector inside its experiment, improving its ability to capture the secrets of matter…

LHC,tunnel,magnet,diode
Measurements in the LHC tunnel.(Image: Maximilien Brice/CERN)
(Vidéo: CERN)

March

April

april fool,force,poisson d'avril,jedi
(Image: Maximilien Brice - Daniel Dominguez/CERN)
  • The Force is strong with the Large Hadron Collider, which restarts on 5 April to cheers all round. After a shutdown lasting almost two years, protons are once again circulating in the world’s largest particle accelerator.

#LHCrestart,#RestartLHC,LHC run2
(Image: Maximilien Brice/CERN)

May

Event display of a candidate B0s particle decaying into two muons in the LHCb detector.(Image: LHCb/CERN)

June

13 TeV,LHC,LHC run2,CERN control centre,CCC
(Image: Maximilien Brice/CERN) (Image: CERN)

July

  • The particle hunters at the LHCb experiment capture a new class of particle, the pentaquark, for their menagerie. As its name suggests, the pentaquark consists of five quarks, assembled in a configuration that had never been seen before.
pentaquark,LHCb
(Image: Daniel Dominguez/CERN)

August

September

SESAME
Some of the magnets for the SESAME project. (Image: Maximilien Brice/CERN)
(Vidéo: Noemi Caraban/CERN)

October

magnet,magnets,aimant,quadrupole,quadripôle,High Luminosity LHC,LHC haute luminosité
A new magnet for the High-Luminosity LHC (Image: Paolo Ferracin/CERN)
  • CERN organises its third TEDxCERN conference with the theme “Breaking the rules”.

TEDxCERN
TEDxCERN 2015 (Image: Maximilien Brice/CERN)

November

ALICE,heavy ion,LHC,LHC run2,event display,Experiments and Tracks
Collision between lead ions seen within the ALICE detector. (Image: ALICE)
  • A new accelerator comes to life. Linac4, the linear accelerator destined to become the first link in CERN’s accelerator chain, accelerates beams to 50 MeV.
Photowalk 2015
The Linac 4 accelerator photographed during the Photowalk competition. (Image: Andrew Hara/CERN)

December

Real Events,For Press
A 13 TeV proton collision recorded by CMS. (Image: CMS/CERN)
A 13 TeV proton collision recorded by CMS. (Image: ATLAS/CERN)