Pulsed wire magnetic field measurements on undulator U10P

Several laboratories have used the pulsed wire method for magnetic field measurement. The acoustic wave distortion of the wire was observed. The limitations of this method were discussed. A pulsed wire system is under test in SRRC on an undulator U10p with a total length of 2m. In this paper the authors clarify the effect of wire imperfection and dispersion of acoustic wave, which are deemed to the main sources of the distortion and limitations. A strategy using thick wire is proposed to make this method reliable in precise measurement.