I could think of several way to fire something, but we are talking about lhc kind of structure. And at the end what will fly away will be close to plasma. But a

I could think of several way to fire something, but we are talking about lhc kind of structure. And at the end what will fly away will be close to plasma. But accelerating something in the ground within spiral pipe (or one really long straight one) is viable with charges (or electromagnets - much better idea).