Design and evaluation of a carbon-11 gas target having auxiliary cooling fins in the target cavity for the stable production of carbon-11

The utilization of carbon-11 (11C) has rapidly grown since the introduction of positron emission tomography (PET) in Korea in 1994. A 11C gas target with auxiliary cooling fins has been designed, manufactured and evaluated to compare its performances to other targets. The target was assembled from individual fin disks. The fin disks were installed inside the cavity and the cooling jacket. Four targets of different designed have been tested using the KIRAMS-13 cyclotron (13 MeV P+; KIRAMS, Korea). In this study, we report the comparative results for these types of 11C targets.