This thing really does look like a Doomsday Machine.
I predict that, once this baby's up and running, people are going to start complaining that it's "anti-climactic" because it didn't take us all out in one step with glorious black hole, doesn't explode and wipe out half of Western Europe, doesn't open the portal to Cthulhu, doesn't revive Jesus Christ, and doesn't stop global warming within three months after it became operational.
Meanwhile, scientists will probably eventually get some data out of it for some future use, which is what it's made for anyway.
*intelligent comments lacking because, honestly, I don't understand a thing about what they're doing*