coolidge tube การใช้

Direct cooling by conduction or convection, as in the Coolidge tube, is difficult.
In the Coolidge tube, the electrons are produced by accelerated, and then hit the anode.
Figure 2.3 compares the X-ray beams from the transmission target and from the Coolidge tube.
This idea was quickly applied to X-ray tubes, and hence heated-cathode X-ray tubes, called " Coolidge tubes ", completely replaced the troublesome cold cathode tubes by about 1920.
A conventional X-ray tube for mammography consumes 4.5-6 kilowatts, and calls for a Coolidge tube with a rotational anode in order to spread the thermal load from a single spot to the edge area of a spinning anode disc.