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由于高能积的钐一钴磁铁的发展,行波管用的环形钐一钴磁铁在雷声公司制造成功。非常希望知道磁滞回线测量和在行波管环形磁铁构成的周期永久磁铁堆上做的函数测量之间的直接关系。研制了能够直接测量环形磁铁的B-H曲线的振动样品磁强计。在麻省理工学院(MLT.)的国家磁铁实验室提供了做这些测量所必需的100千奥斯特的磁场。本文介绍了测得的(B-H)数值和在周期永久磁铁堆中测得的数值的相互关系。通常在行波管工作环境所要求的温度下对周期永久磁铁堆进行稳定化热处理,内禀最大磁能积(4πMH)_(max)越大,在周期永久磁铁阵列中测得的轴向磁场越高。
Due to the development of high-energy product samarium-cobalt magnets, toroidal samarium-cobalt magnets for traveling wave tubes were successfully manufactured by Raytheon. It is highly desirable to know the direct relationship between hysteresis loop measurements and function measurements made on periodic permanent magnet stacks formed of toroidal toroidal magnets. A vibrating sample magnetometer capable of directly measuring the B-H curve of a ring magnet was developed. The National Magnet Laboratory at the Massachusetts Institute of Technology (MLT.) Provides the magnetic field of 100 kOhms necessary to make these measurements. This article describes the relationship between the measured (B-H) value and the value measured in a periodic permanent magnet stack. The permanent permanent magnet stack is usually subjected to a stabilization heat treatment at the temperature required for the working environment of the traveling wave tube. The greater the intrinsic maximum energy product (4πMH) _ (max), the greater the axial magnetic field measured in the periodic permanent magnet array high.