X-ray Tube Target Stuff

jpsmith123, Thu Jan 12 2017, 03:50PM

I was researching the design of x-ray tube targets (for my someday-to-be-built demountable flash x-ray tube), and I came across this:


Apparently it's an English translation of a Russian patent for an x-ray tube, but I'm not sure I correctly understand the gist of it.

It seems that the inventive feature is an x-ray target comprised of a single crystal piece of tungsten for example, oriented a certain way with respect to the incident electron beam, which according to the inventor greatly increases the efficiency of x-ray production...like an order of magnitude or so better efficiency, if I'm reading it correctly.

I tried to search for any other independent, published papers that would support this claim, but I didn't find very much. However, I did find some U.S. patents such as the following, which, although they don't use a tungsten single crystal target/anode, the anode designs they use may be a valid macroscopic analog of what's happening with the single crystal anode, which makes the Russian patent seem inferentially plausible.




Has anyone ever heard of using a piece of single crystal tungsten as a way of increasing bremsstrahlung efficiency and directivity in an x-ray tube?