Canada has a strong intermediate-energy laboratory, the TRIUMF National Laboratory for Particle and Nuclear Physics, and a successful underground laboratory, the Sudbury Neutrino Observatory (SNO), that is now being expanded. In the past its HEP community has been carrying out experiments in the US as well as in Europe, notably the OPAL experiment at LEP.
Via the National Research Council Canada (NRC), with funding through TRIUMF, Canada made important contributions to the LHC warm insertions and injection lines. A first Co-operation agreement as well as two Protocols were signed between CERN and TRIUMF in 1996. In 2009, a new agreement was signed to define the frame of the contribution by TRIUMF to the upgrade of the CERN accelerators.
Canadian scientists are contributing in a substantial way to the ATLAS experiment, with funding from the Natural Sciences and Engineering Research Council of Canada (NSERC). Canadian activities in particle physics are coordinated through the national Institute of Particle Physics.
Canada is contributing to the deployment of the Worldwide LHC Computing Grid (WLCG) via a Tier-1 centre at TRIUMF and two Tier-2 Centres funded by the Canadian Foundation for Innovation (CFI), and participates in several non-LHC experiments such as ALPHA,ATRAP, CAST and ISOLDE.