Dr Zhou’s method, by contrast, employs a process called electron-field emission. This dispenses with the heat. Also, instead of having a single metal filament release the electrons, it relies on myriad carbon nanotubes to do the same thing. The result is a compact source of X-rays that can be controlled with great precision.
Engineering is the art of making what you want from what you can get at a profit.
Dr Zhou’s method, by contrast, employs a process called electron-field emission. This dispenses with the heat. Also, instead of having a single metal filament release the electrons, it relies on myriad carbon nanotubes to do the same thing. The result is a compact source of X-rays that can be controlled with great precision.