If you need to pass through the curtains and the laser is operational, there is a rotating red light on. If there is no red light, the laser is off. You can open the curtains and proceed as usual.
If the rotating red light is on, it means the laser is operational and people are actively working on it. It is courteous to contact the laser operators using the sector 20 phone (call x7486) to request an entry such that they can find an appropriate breaking place in their work.
Should you open the curtains when the laser is operational, the transport shutters close and the laser is not transported to FACET. There is no safety risk to anyone. The laser hazard is disabled and you can proceed without goggles. However, this is not helpful to the people working on the laser so we politely request that you don't do this.
Rotating Red Light OFF - no laser. Open curtains.
Rotating Red Light ON - laser in operation. Call x7486 to request entry.
When the curtain is opened, the laser hazard is disabled. There is no safety hazard when you open the laser curtains.