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- Title
An Active Irradiation System with Automatic Beam Positioning and Focusing for a Medical Cyclotron.
- Authors
Häffner, Philipp Daniel; Belver-Aguilar, Carolina; Casolaro, Pierluigi; Dellepiane, Gaia; Scampoli, Paola; Braccini, Saverio; Martines, Emilio
- Abstract
A novel active focusing system was developed for enhancing the irradiation performance of the 18 MeV medical cyclotron in operation at the Bern University Hospital in view of the production of non-conventional medical radioisotopes using solid targets. In several cases, such as the production of 43 Sc and 44 Sc, the beam has to be kept stable within a very small target of about 5 mm diameter. For this purpose, we conceived and realized an apparatus based on a compact focusing and steering magnet system followed by a two-dimensional beam monitoring detector and a specific feedback software that drives the magnet to optimize the beam for a given irradiation set-up. We report on the design, realization and validation beam tests performed using the research beam transfer line of the Bern cyclotron. We demonstrated that the beam spot can be kept on target thanks to the fact that the system automatically reacts to perturbations. Compactness is one of the key features of this system, allowing its use in accelerator facilities with limited space, such as medical cyclotrons for radioisotope production.
- Subjects
BERN (Switzerland); CYCLOTRONS; IRRADIATION; RADIATION trapping; PARTICLE accelerators; RADIOISOTOPES; UNIVERSITY hospitals
- Publication
Applied Sciences (2076-3417), 2021, Vol 11, Issue 6, p2452
- ISSN
2076-3417
- Publication type
Article
- DOI
10.3390/app11062452