The Gauss Rifle and Magnetic Energy
The Gauss Rifle and Magnetic Energy
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高斯步枪和磁能
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
J. Rabchuk
中科院分区：
文献类型：
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作者：
J. Rabchuk
随着廉价且易于获得的 NdFeB 磁铁的出现，设计许多简单但有效的磁力演示已经成为可能。其中一个被称为“高斯步枪”的演示是一种线性磁加速器。它相对容易组装，并且演示中使用的钢球轴承的动能快速且显着增加。这使得该演示非常引人注目，为讨论许多物理主题奠定了基础，包括能量守恒、磁能和磁力。它还具有成为实验室实验的潜力，因为材料相对便宜，磁铁的布置存在一些挑战，并且可以通过测量轴承的初始和最终速度来表征加速器的性能。最后，通过使用免费的有限元磁学软件，甚至可以预测不同的最终速度......
With the advent of cheap and easy-to-come-by NdFeB magnets, it has become possible to design a number of simple but effective demonstrations of magnetic force. One such demonstration, dubbed the “gauss rifle,” is a type of linear magnetic accelerator. It is relatively easy to assemble and involves a rapid and dramatic increase in kinetic energy of the steel ball bearings used in the demonstration. This makes the demonstration a good attention getter, setting the stage for a discussion of a number of physics topics, including conservation of energy, magnetic energy, and magnetic force. It also has the potential for becoming a laboratory experiment since the materials are relatively cheap, there is some challenge in the arrangement of the magnets, and the performance of the accelerator can be characterized by measuring the initial and final velocities of the bearings. Finally, by using freely available finite element magnetics software, it is even possible to make predictions of the final velocity for diffe...