Wire scanners move a sensing wire across the path of the beam and, typically, measure a response generated by a PhotoMultiplier Tube (PMT) as the beam hit's the wire.
The wire scanner is moved by a stepper motor under constant computer control to regulate it's speed in order to optimize acquisition time and final resolution. Consequently, the power signals generated by this process will have a varying EMI signature. ***Need more data here
The PMT requires high DC voltage to operate (>1000Volts) but since this is DC it should not induce significant EMI. The pulses returned by the PMT are of a reltively low level.
