
A fill rate monitor has been developed for the NSLS storage rings to allow machine tuning over a very large dynamic range of beam current. Synchrotron light, focused on a photodiode, produces a signal proportional to the beam current. A charge balancing circuit processes the diode current, creating an output signal proportional to the current injected into the ring. The unit operates linearly over a dynamic range of 120 dB and can resolve pulses of injected beam as small as 1 /spl mu/A.
43 Particle Accelerators, Nsls, Beam Injection, Performance, Beam Monitoring, Storage Rings, Beam Monitors, Electron Beams, Noise, Beam Currents
43 Particle Accelerators, Nsls, Beam Injection, Performance, Beam Monitoring, Storage Rings, Beam Monitors, Electron Beams, Noise, Beam Currents
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