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| A NEW TYPE OF ADJUSTABLE PERMANENT MAGNETIC CIRCUIT |
| Lang Liang; Jiang Junji |
| Institute of Electronics Academia Sinica Beijing |
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Abstract An adjustable permanent magnetic circuit that is staked by three layers of samarium-cobalt permanent magnets magnetized in radial direction and magnetic conductive material such as iron, is developed. By means of CAD, a uniform magnetic field distribution having flux density of 1.2 kGs on the axis and a fluctuation of ±0.7% within the axial length of 270 mm is achieved. It is a good magnetic circuit for permanent magnetic focusing system of high power microwave tubes.
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Received: 28 December 1986
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1988, Vol. 10 
