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This

@Gizmodo

title caught my eye because

@CERN

's oldest accelerator is no longer running: - The PS is the oldest accelerator among those running today. -

@CERN

's first accelerator was the SC (1957-1990). 😉

@RyanFMandelbaum

. See also, home.cern/science/accele

Gizmodo title saying "CERN's Oldest Particle Accelerator is Still Running, 60 Years Later"

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ALT

Replying to

Setting aside costs, lack of materials (helium, etc.), tunnels under oceans, etc. is there any physics reason why we couldn't have a collider that went completely around the Earth's equator? How powerful would that be?

Replying to

Enrico Fermi has an idea like that. He estimated cost and collision energy. Since the, we made magnets with more intense fields so that we can get higher energies in the same circumference. So, to answer your question, it really depends on how intense a 🧲 field we can make.