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实现迴旋管永磁聚焦,国际上未见文献报导。本文提出采用一种适合于迴旋管绝热磁控注入枪工作的双均匀区“径向”磁路系统作为永磁聚焦方案。设计计算选用磁能级(BH)_(max)=20MGO。的钐钴磁钢。所以采用这种磁钢,是由于国内该种磁钢制作工艺已成熟,且其制件尺寸可较大,性能比较稳定,可大批生产,退磁曲线基本上为一直线。通过大量计算,用计算机辅助设计优选了结构。计算表明,对于建立8毫米二次谐波迴旋管所需的7000高斯强磁场系统,约需磁钢40余公斤,这对于研制8毫米二次谐波永磁聚焦迴旋管以及厘米波段迴旋管是很吸引人的。本文最后还对提高磁路效率、增大均匀区、磁场实现可调以及制管等方面进行了简单的讨论。
To achieve the gyro focus of permanent magnet, there is no international literature. In this paper, a “radial” magnetic circuit system of double uniform zone which is suitable for the operation of the rotary magnetron injection gun is proposed as the permanent magnet focusing scheme. Design and calculation of magnetic level (BH) _ (max) = 20MGO. SmCo magnets. Therefore, the use of such magnets is due to the domestic production of the kind of magnetic steel technology has matured, and its parts size can be larger, more stable performance, mass production, demagnetization curve is basically a straight line. Through a large number of calculations, the structure was optimized with computer aided design. Calculation shows that for the establishment of 8 mm second harmonic gyro 7000 required Gaussian strong magnetic field system, about 40 kg magnet, which for the development of 8 mm second harmonic permanent magnet focusing gyro and centimeter band gyro is Very attractive. Finally, this paper also briefly discussed the aspects of improving the magnetic circuit efficiency, increasing the uniform area, adjusting the magnetic field and making pipes.