Radioisotope production apparatus

A radioisotope production apparatus which irradiates a target material with a charged particle beam to produce a radioactive isotope, the apparatus comprising:

• a particle accelerator which emits the charged particle beam along a predetermined beam axis;
• a first target portion on which the charged particle beam emitted from the particle accelerator is incident and through which the charged particle beam passes;
• and
• a second target portion on which the charged particle beam having passed through the first target portion is incident,
• wherein the first target portion includes:
• a body barrel portion,
• a beam passage which is formed through the body barrel portion and through which the charged particle beam passes,
• a target holder which is attachable to and detachable from the body barrel portion,
• a target material holding portion which is formed in the target holder and is configured to hold a first target material on the beam axis in the beam passage, and
• a cooling gas supply unit which supplies a cooling gas for cooling the first target material;
• wherein the second target portion includes:
• a body portion,
• a substrate holding portion which is formed in the body portion and is configured to hold a target substrate, the target substrate includes a substrate body and a second target material provided on the substrate body, on the beam axis, and
• a cooling water supply unit which supplies cooling water for cooling the target substrate to a downstream-side surface of the target substrate with respect to the charged particle beam;
• and
• wherein a total thickness of the first target material and the target material holding portion of the first target portion on the beam axis is smaller than a thickness of the target substrate on the beam axis.