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We added seven new tutorials to our technical library: 1) Trak design of an electron injector for a coupled-cavity linear accelerator. Electron gun that maintains its focal properties over a broad range of current for high capture efficiency in an electron linac. 2) Calculating field stress on a high-voltage insulator with HiPhi. Determination of field stress over the [...] I have developed software for Windows since 3.1. On the whole, Windows has evolved to an excellent operating system with a high degree of consistency and continuity for developers. I became acutely aware of the advantages of Windows through painful experiences distributing programs in Linux. This said, the question remains: why is Windows so irritating to [...] A user recently sent a Trak setup where ions from an emission surface mysteriously moved backward, apparently in opposition to the electrical forces. The cause and resolution of the problem provide a good illustration of emission surface techniques. To start, it is important to recognize 1) the concept of open and filled regions in the TriComp programs [...] This article represents a detour from the rarefied atmosphere of finite-element numerical methods and the Maxwell stress tensor. In it, I’ll describe how to build a computer accessory that might be the most useful one you own. It is ironic that the last place you would ever put your laptop is in your lap. First, your clothing [...] The Maxwell stress tensor may be used to calculate electric and magnetic forces on objects. The method is seldom introduced in introductory texts on electromagnetism. Advanced texts often present the Maxwell stress tensor as a mathematical abstraction without explaining why is is useful. In reality, the method is critical for practical force calculations in numerical codes. [...] |
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