Replacement of used or damaged optical components of the setup will be made with the laser off (power switched off and unplugged). The positions and orientations of the new components will be mechanically surveyed and extensively checked before turning to any procedure needing the laser on.
When the target enclosure windows need to be opened (such as to inspect the target or to replace a target cell) and the hall is not in laser controlled access, the lasers must be turned off before opening the target enclosure. The keys for all of the laser power supplies will be secured in a lock box. All staff working in the vicinity of the target enclosure must apply personal locks to this box in accordance with JLab lockout/tagout procedures. The vicinity area will be determined from the power measurement and with clear danger sign posted.
In case of the failure of any electromechanical or electrical or electronical device, the lasers and the other power supplies will be turned off and the out of order devices will be fixed by Coherent or Opto Power service personnel. The Laser power can simply be unplugged.