TimePencilYeah! What Mike said!
Maybe there's one beamline that completes multiple circuits of the 27km tunnel, with a second beamline that runs in the opposite direction.
That would mean the stuff being "smashed" does 4500+ laps of the tunnel before colliding.
Originally planned to be built under the France- German border, the France-Switzerland border was selected when the Germans opted out.
The Germans remembered that they're no longer allowed to fire anything into France.
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