偏轉(zhuǎn)線圈磁場的測量
MEASUREMENTS OF MAGNETIC FIELD OF THE DEFLECTION YOKE
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摘要: 本文介紹了用雙線圈測量偏轉(zhuǎn)磁場的方法。文中首先導出雙線圈處于x(或y)軸任意兩個位置求算場參數(shù)H0、H2、H4的普遍公式。當兩個小線圈的靈敏度稍有差異時,該公式仍然有效。利用沿x(或y)軸測得的一系列數(shù)據(jù)進行回歸分析,求得場參數(shù)的最佳擬合值,可適用于離軸較遠的距離。
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關(guān)鍵詞:
Abstract: A double coil system has been designed for measuring the magnetic field of a deflection yoke. A general formula for calculating the field parameters of H0, H2 and H4 is derived when the measuring double coil is in any two positions on x (or y) axis. Even when there exists a small difference o f sensitivities between these two coils, the formula should stili be valid. Measurements are processed by the regression analysis along the x (or y) axis in order to obtain the optimum values for the field parameters. Measurements can be taken for regions farther away from the z-axis. -
J. Kaashoek, Philips Rea. Rep.,Suppl.,23(1968), 1.[3]丁守謙,物理學報,29(1980), 1411.[4]丁守謙,物理學報,30(1981), 459.[7]中國科學院數(shù)學研究所數(shù)理統(tǒng)計組編,回歸分析方法,科學出版社,1974年. -
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