X-ray generation device and x-ray image capture system

An X-ray generation device comprising:

• a cathode including an electron source that generates an electron beam;
• an anode including a transmission type target configured to transmit, in an incident direction of the electron beam, an X-ray generated by collision of the electron beam;
• and a convergence electrode that converges the electron beam toward the transmission type target,
• wherein the transmission type target has a first region having a locally small thickness and a second region having a larger thickness than the first region,
• wherein the X-ray generation device further comprises an electron beam deflection unit configured to switch an incident position of the electron beam to the transmission type target between the first region and the second region, and
• wherein the electron beam deflection unit has an adjustment mode to adjust an X-ray focal spot diameter and an X-ray generation mode to generate an X-ray, the electron beam is caused to enter the first region in the adjustment mode, and the electron beam is caused to enter the second region in the X-ray generation mode.