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首页> 外文期刊>IEEE Transactions on Magnetics >Magnetic Diffusion in Railguns: Measurements Using CMR-Based Sensors
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Magnetic Diffusion in Railguns: Measurements Using CMR-Based Sensors

机译：轨道炮中的磁扩散：使用基于CMR的传感器进行测量

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摘要

Magnetic diffusion is of great importance in the domain of electromechanical energy conversion since it can be a performance-limiting mechanism. This paper deals with magnetic diffusion in the case of the rails of a railgun. The experiments benefit from the use of a new type of high magnetic-field sensor based on thin $(≪1 muhbox{m})$ manganite films, which exhibits a colossal magnetoresistance (CMR) effect and has very small sensitive areas (e.g., $0.5 hbox{mm}times 50 muhbox{m}$). Some basics about CMR and the design of the sensor are given. Several sensors were used and calibrated in the course of static transient railgun experiments. Here, varying spatial field distributions due to the use of different rail materials were recorded. Magnetic-field measurements during railgun operation with projectile velocities exceeding 1000 m/s have been successfully performed. By comparison with 3-D finite-element calculations, interesting results concerning magnetic diffusion have been worked out.
机译：磁扩散在机电能量转换领域非常重要，因为它可能是一种性能限制机制。本文针对的是磁枪轨道的磁扩散。实验得益于使用新型的高磁场传感器，该传感器基于薄的$（≪1 muhbox {m}）$锰铁矿薄膜，该传感器表现出巨大的磁阻（CMR）效应，并且具有非常小的敏感区域（例如， $ 0.5 hbox {mm}乘以50 muhbox {m} $）。给出了一些有关CMR和传感器设计的基础知识。在静态瞬变轨道炮实验过程中使用并校准了多个传感器。在此，记录了由于使用不同的轨道材料而产生的变化的空间场分布。在射弹速度超过1000 m / s的喷枪操作过程中，磁场测量已成功完成。通过与3D有限元计算进行比较，得出了有关磁扩散的有趣结果。

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