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Figure 4
Positional feedback response to impulse deflections of the VFM steering angle; dependence on sensitivity and LPF TC taken at 13.6 keV for the active beam stop intensity (a, c) and VFM piezo steering actuator voltage (b, d). Increasing the TC and increasing the gain decreases the settling time at the cost of long-term oscillations. The steps in the VFM angle response in panels (b) and (d) are due to the finite resolution of the scaler and voltage-to-frequency instrumentation used to record the VFM piezo readback voltage. Data presented in these graphs have been offset for clarity.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 23| Part 2| March 2016| Pages 443-447
doi:10.1107/S1600577516000679
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