Advanced Photon Source

An Office of Science National User Facility

Lesson Module A-15: Global Online


Floor Coordinators may be called upon to alter the Global Online status of a beamline.Upon completion of this module, the FC should understand the importance of Global Online and feel comfortable executing the steps to take a beamline offline and subsequently restore Global Online status.

Global Online is a system by which the FC grants permission for a particular beamline to run.

When the FC turns the key to place a beamline Globally Online, a valve is opened and air is provided to open the two safety shutters located inside the Front End of that beamline.

In order for a beamline to be placed Globally Online, both the machine protection system (ACIS) and the personnel safety system (PSS) must agree that it is safe for beam to enter the front end.


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