X-RAY TUBE BASED ON THERMAL EMISSION OF LAB6 NANOMATERIAL, AND MOVABLE CT SCANNER

摘要

An X-ray tube based on thermal emission of a LaB6 nanomaterial, and a movable CT scanner. The X-ray tube based on thermal emission of a LaB6 nanomaterial comprises anode (10), a cathode (11), and a tube case (12). The tube case (12) is used for supporting the anode (10) and the cathode (11), and enables a working environment of the anode (10) and the cathode (11) to be insulated from the outside, thereby keeping the working environment to be vacuum. The cathode (11) is manufactured by using the LaB6 nanomaterial, and when the cathode (11) is heated to the working temperature of the LaB6 nanomaterial, electrons of thermal emission bombard the anode (10), so as to generate X-rays. According to the cathode manufactured by using the LaB6 nanomaterial, in a case in which the a same emission current density is obtained, the working temperature of the cathode manufactured by using the LaB6 nanomaterial is lower than that of a wolfram filament cathode by more than 1000 degrees centigrade, thereby greatly reducing the evaporation rate of the cathode material; in addition, the emission current, the stability and the service life of the used thermal emission cathode X-ray tube are greatly improved.