MAGNET FIELD MEASUREMENT AND FIELD ERRORS ANALYSIS OF OPTICAL KLYSTRON

In the paper,　all of measurement results of transverse magnet field of optical klystron are given, including the distribution on axis,　magnet field uniformity and integrated field distribution.　Furthermore, the random errors and harmonic magnet field are analyzed, and the integrated multipoles field is calculated.　At last, the influence of nonzero integrated field on the close orbit of electron and the operation parameter of storage ring are discussed.