Effect of vacuum chamber eddy current and compensation by digital feedback | Zendy

Y. Chung | Zendy

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Effect of vacuum chamber eddy current and compensation by digital feedback

Author(s) -

Y. Chung

Publication year - 1992

Language(s) - English

Resource type - Reports

DOI - 10.2172/89493

Subject(s) - eddy current , magnet , compensation (psychology) , control theory (sociology) , storage ring , pid controller , physics , electrical engineering , inductance , vacuum chamber , current (fluid) , nuclear magnetic resonance , acoustics , mechanics , engineering , optics , mechanical engineering , computer science , temperature control , control (management) , voltage , psychology , beam (structure) , quantum mechanics , artificial intelligence , psychoanalysis

Measurement of the effect of the eddy current induced in the APS storage ring vacuum chamber by the storage ring sextupole magnet and its compensation using digital feedback with proportional, integral, and derivative (PID) control algorithm are presented. The magnetic field in the vacuum chamber shows strong quadrupole and sextupole components varying with frequency, in addition to significant attenuation and phase shift. Large changes in the magnet resistance and inductance were also observed. Development of a theory of digital feedback to obtain system responses and the conditions for optimal control will be described, in conduction with design of a digital filter to compensate for the eddy current effect

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