Hazards associated with the vacuum system are due to rapid decompression in case of a window failure. Loud noise can cause hearing loss. To mitigate the hazard, all personnel in the vicinity of the large chamber with a window are required to wear ear protection when the chamber is under vacuum. Warning signs must be posted at the area.
The scattering chamber is equipped with a large 10 
aluminum window that
allows the spectrometers to swing from 12.5
to 165
on the EA and 12.5 to 140 on the HA. In order to
protect this window when the Hall is open, lexan window guards are
installed.
At the inlet of the sieve slit a Møller 8" diameter 7 kapton window
is provided to separate the target chamber from the spectrometers.
Finally, under the detectors, a 4 titanium window is provided.
Eventually this will be replaced with a low mass mylar/kevlar window.
The 1 
/s vac ion and the cold cathode gauges operate at several
KV; consequently there is also a shock hazard.
Additionally, all vacuum vessels and piping are designed as pressure vessels.