THE IBA SELF-EXTRACTING CYCLOTRON PROJECT

Wiel Kleeven, Stephane Lucas, Jean-Luc Delvaux, Frederic Swoboda, Simon Zaremba, William Beeckman, Dirk Vandeplassche, Michel Abs, Yves Jongen

IBA, Chemin du Cyclotron 3, 1348 Louvain-La-Neuve, Belgium


The self-extracting cyclotron is a high-intensity 14 MeV H+ machine for isotope production. There is no electrostatic deflector. Extraction is achieved with a special shaping of the magnetic field. There are two long poles and two short poles, both with an elliptical gap profile; this provides a steep fall off of the magnetic field at the pole radii. An extraction groove is machined in the iron of one of the longer poles. First harmonic coils create a large orbit separation at the entrance of the ex-traction path and extract the beam. The machine is presently installed in the industrial isotope production site where the final commissioning and tests took place. Beams of more than 1.5 mA have been extracted and transported. Further development is ongoing in order to increase the current on target to at least 2 mA in the coming months. Commercial isotope production will start in the course of this year. The concept of the machine is explained and the layout of the machine and beam lines is presented. Results of orbit calculations and central region optimizations are given. Results of the measurement of extracted beam shapes and emittances are given. The progress and present status of the project are discussed.