As one would imagine, interlocks on modern accelerators are much better. Things like room radiation monitors combined with switches on motorized doors only clos

As one would imagine, interlocks on modern accelerators are much better. Things like room radiation monitors combined with switches on motorized doors only closable from outside help alot. This way exposure is only possible if someone else accidentally closes you in, and there are very loud klaxons that warn you when beam coming through is imminent. Getting into a target or radiation area when the accelerator is powered on requires taking a key from the console which blocks the beam at an early stage before it is accelerated.