In preparation for the squeezers' reactivation of the PSL, the enclosure has been modified to allow it to be mechanically locked when the laser is running, reducing our reliance on the interlock system and adding a layer of safety in place of wearing glasses in the LVEA.

Pictured below, the inner doors are held in place by aluminum 3/4" x 3/4" bars only accessible by opening the front doors, while the front doors are prevented from moving by padlocks secured through holes drilled into the sliding tracks. The padlocks are all similarly keyed and the key will be kept in the control room.

Note that even with this system in place it's still possible to move some of the doors enough to trigger a violation.