TRIUMF is Canada's national laboratory for particle and nuclear physics and accelerator-based science. TRIUMF is considered Canada's premier physics laboratory, and is consistently regarded as one of the leading subatomic physics research centers on the international level. Owned and operated by a consortium of universities as a joint venture, TRIUMF is located on the south campus of one of its founding members-the University of British Columbia in Vancouver, British Columbia. TRIUMF houses the world's largest cyclotron, a source of 520 MeV protons, which was named an IEEE Milestone in 2010. TRIUMF's accelerator-focused activities involve particle physics, nuclear physics, nuclear medicine, materials science, and detector and accelerator development.

Canada's national laboratory for particle and nuclear physics? Okie... think carefully first, then make a decision:
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The relevant information to answer the above question is: TRIUMF is Canada's national laboratory for particle and nuclear physics and accelerator-based science. So, the answer is TRIUMF.
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