摘要：China and France have for centuries enjoyed friendly relations in the fields of politics, trade and culture. The China-France Culture Year, beginning this October, as the largest Sino-foreign event since the founding of New China, is expected to spark a new round of exchanges between the two *** two years of planning, the China Culture Year is to be inaugurated in France soon this September. With the theme of 'Ancient China, Colorful China, Modern China', the event aims to offer a comprehensive view of

摘要：The Central Region Model(CRM)is a compact H^- *** of the intrinsic asymmetry of the magnet,its machining and assembly are very *** guarantee the magnet field distribution,it is necessary to measure and shim the magnetic *** paper presents a study on the design and use of the mapping system based on the Hall Effect and the re-machining of shimming bars after analyzing the magnetic field measurement data to achieve the isochronous field and good vertical focusing *** method to effectively reduce the amplitude of the 1st harmonic by shimming bars ls also introduced.