
Beamline 7.2W
Macromolecular Crystallography
Personnel Safety Interlock (PSI) System
The Personnel Safety Interlock (PSI) System ensures the safety of all personnel inside the experimental station or optical hutch. It operates through a mandatory search procedure to confirm that no one remains inside before X-ray radiation is activated.
✔ Requires a full personnel search before enabling X-rays
✔ Prevents radiation if the search is incomplete
✔ Provides safety reminders when opening or closing the hutch
This system helps maintain a secure and safe working environment for everyone.
⚠️ Emergency Radiation Stop System
The Emergency Radiation Stop System provides an immediate way to stop radiation in case of an emergency.
✔ Emergency Stop buttons are located inside each hutch, near every
door, and at the main Hutch Interlock panel.
✔ Press and hold to stop X-rays or combined radiation immediately.
✔ Designed for quick response to ensure personnel safety during
unexpected situations

Press and hold to stop
radiation immediately.
🚨 Emergency Radiation Stop – BL7.2W Location


Button at key entry points for quick radiation shutdown.


Button near main hutch entrance for fast response.

Button inside the experimental hutch for personnel safety.
