The task of the beamline equipment protection system (BLEPS)
is to monitor critical beamline parameters and, if a dangerous condition is
detected, initiate appropriate action to prevent mechanical or x-ray beam related
damage to beamline components. In particular, the BLEPS...
Communicates the beamline status to the APS-controlled front-end
EPS (FEEPS) and causes the front-end safety shutter to close and/or
be inhibited from opening if a dangerous beamline condition is
detected. In return, the FEEPS sends a signal to the beamline EPS
indicating the status of the front-end section.
Communicates the beamline status to the personnel safety system
(PSS) and causes the photon shutter PS112 located in the FOE to
close and/or be inhibited from opening when a problem in a section
downstream from that shutter is detected. IN return, the PSS indicates
its status to the BLEPS.
Monitors all ion pumps along the beamline and isolates a vacuum
problem by closing the surrounding gate valves.
Monitors cooling water flow through optical components that are
not monitored by the FEEPS.
Monitors limit switches on movable devices such as the white
beam slit, the monochromator, the mirrors and beam pipe articulation
drivers. On detecting a limit switch activation the BLEPS stops
and inhibits all motor movements that could cause the fault and
signals the beamline control computer to abort all current requests
from moving these motors.
Communicates its status to the beamline control computer.
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