Radioisotope production apparatus
A radioisotope production apparatus includes a particle accelerator, a first target portion on which a 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 passing through the first target portion is incident. In the first target portion, a target material is held in a beam passage, and a cooling gas supply unit which blows a cooling gas to the target material is provided. In a second target portion, a target substrate is held on a beam axis and a downstream-side surface of the target substrate with respect to the charged particle beam is cooled by cooling water. A total thickness of target foils of the first target portion on the beam axis is smaller than a thickness of the target substrate of the second target portion on the beam axis.
1. 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.
2. The radioisotope production apparatus according to claim 1 ,
wherein the first target portion includes a plurality of the target material holding portions.
3. The radioisotope production apparatus according to claim 1 ,
wherein the first target material is inserted onto and extracted from the beam axis in a direction intersecting the beam axis.