Abstract
This study is aimed at measuring the ripple of magnetic power supply of BEPCII and checking its effect to beam energy. A sensor made of printed circuit board coils is designed and manufactured. The sensor was inserted into a good area region of the magnetic field with the surface perpendicular to the field force lines. The change of the magnetic field would be detected according to Faraday’s law. The experiment result indicates that the time-dependent ripple of the magnetic field is in the magnitude of ppm. Such a small effect of the time-dependent ripplecan be negligibleto beam energy.
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