An Improved Method for Demagnetizing Rocks in Alternating Magnetic Fields
An Improved Method for Demagnetizing Rocks in Alternating Magnetic Fields
复制标题
交变磁场中岩石退磁的改进方法
DOI：
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发表时间：
1966
期刊：
影响因子：
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通讯作者：
M. McElhinny
中科院分区：
文献类型：
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作者：
M. McElhinny
摘要介绍了一种新的交变磁场退磁装置，它能产生高达200毫韦伯m- '（2000高斯）的峰值磁场。利用一种特殊的无级可变变压器来提高和降低退磁螺线管中的电流。该仪器已完全自动化，大大加快了古地磁调查中的常规退磁程序。对岩石试样最合适的翻滚布置作了一些讨论，认为8:15或11:16的翻滚比其他工人使用的更有优势。
Summary A new alternating field demagnetization apparatus is described which produces peak fields of up to 200 milliweber m-’ (2 000 gauss). Use is made of a special infinitely variable transformer to raise and lower the current in the demagnetizing solenoid. The apparatus has been made completely automatic which considerably speeds up routine demagnetizing procedures in palaeomagnetic investigations. Some discussion is given of the most suitable tumbling arrangement for the rock specimen and it is suggested that tumbling ratios of either 8 : 15 or 11 : 16 have some advantage over those used by other workers.