Quote Originally Posted by hemmjo View Post
I wonder if that is a "Caution, Do Not look into the beam" sticker at the end of the tool?

You can get one on Amazon for only $48,640.00.
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I once got to stand at the end of the main beam output at SLAC. Fortunately they had the magnets turned on and the beam was being deflected to a different experiment. No "do not stare into beam" sign, but the backstop for the beam was a huge steel block with deep pits blasted into it.