脉冲悬丝测磁技术研究的发展

Development of pulsed wire technology for magnetic field measurement

脉冲悬丝法是基于磁场中悬丝通电产生运动的原理,通过位移传感器测量悬丝位移,来反映带电粒子束通过磁场时所受影响,可对具有小开口和较大长/径比的内腔磁场器件的性能进行测量和校正。结合典型脉冲悬丝法的理论模型,阐述了脉冲悬丝法磁场测量技术的基本原理。总结了国内外脉冲悬丝技术的相关研究,概括了脉冲悬丝法的发展和已取得的成就,探讨了脉冲悬丝法存在的局限和该技术的发展趋势与研究方向。

Pulsed wire method is based on the principle that a pulse-carrying wire would be deformed in a magnetic field by the Lorenz force. Detected by displacement sensors, the deformation could be regarded as the effect on the electron beam passing through the same field. The method is mainly used for performance measurement and emendation of magnetic device with inner cavity magnetic field device of small gap and large length/diameter ratio. The basic principle of pulsed wire method for magnetic field measurement is introduced with a typical theoretical model. The definition of magnetic field integral along the length axis is cited. The physical meanings of the first and second magnetic field integration are indicated. The development of related research by different groups has been overviewed. The limitations and the possible development trend are discussed.