X-ray source having cooling and shielding functions

An X-ray source having cooling and shielding functions, comprising:

• an X-ray generation unit emitting X-rays in a vacuum, the X-ray generation unit comprising a gate electrode, a focusing electrode, and one or more insulation columns;
• a cooling unit provided around a periphery of the X-ray generation unit, the cooling unit functioning to remove heat generated from the X-ray generation unit;
• and
• a shielding unit provided around a periphery of the cooling unit, the shielding unit functioning to shield areas exposed to X-rays other than the areas related to the emission of the X-rays,
• wherein the gate electrode and the focusing electrode have one or more first holes and are configured such that the one or more insulation columns pass through the gate electrode and the focusing electrode,
• wherein the one or more insulation columns detachably extend through the gate electrode and the focusing electrode in a first direction and are provided with one or more second holes, and
• wherein the one or more first holes extend in a second direction and open outward, and the one or more second holes are configured to be in communication with at least one of the one or more first holes by adjusting positions of the gate electrode and the focusing electrode along the first direction.