在使用大型磁铁的许多现代物理仪器中,不仅对场强及其分布发生兴趣,而且对磁力线的空间形状、特别是对具有一定曲率的区域也有很大兴趣。在这种情况下,必须对磁力线的空间形状进行较准确的测量。曾经有过许多显示磁力线的方法,但往往是复杂的和不准确的。例如,М.Арденне提出“点阴极放电管视测磁力线”方法。这种方法的优点是 In many modern physical instruments that use large magnets, there is not only an interest in field strength and its distribution, but also a great deal of interest in the spatial shape of the lines of force, especially in areas with a certain curvature. In this case, you must make a more accurate measurement of the spatial shape of the lines of force. There have been many ways of showing lines of force, but they are often complicated and inaccurate. For example, М.Арденне proposes a “point cathodic discharge tube to measure magnetic field lines” method. The advantage of this method is