Small-Sized Flat-Tip CNT Emitters for Miniaturized X-Ray Tubes

Figure 1

(a) SEM image of a flat-tip CNT emitter with CNTs coated on the side plane of a W tip. (b) Trajectories of electrons emitted at different positions of a flat-tip emitter. (c) Characterization of the electron beam diameter at the anode position using the emitter shown in (a) and a phosphorous screen.