CYCLOTRONS 2010 - List of Authors (Nactergal, B.)

Paper	Title	Page
MOPCP070	Design of IBA Cyclone 30XP Cyclotron Magnet	189
	E. Forton, M. Abs, W.J.G.M. Kleeven, B. Nactergal, D. Neuvéglise, S. Zaremba IBA, Louvain-la-Neuve, Belgium
	IBA is developing an evolution of its famous Cyclone 30 cyclotron. The Cyclone 30xp will be a multi-particle, multiport cyclotron capable of accelerating alpha particles up to 30 MeV, deuteron (D-) beams between 7.5 and 15 MeV and proton (H⁻) beams between 15 and 30 MeV. The magnet system has been improved with IBA Cyclone 18/9 and Cyclone 70 features. Coil dimensions have been updated in order to raise the free space in the median plane. This allows the mounting of a retractable electrostatic deflector system for the extraction of the alpha particle beam. Gradient corrector pole extensions have been added to ease the alpha beam extraction. Finally, compensation for relativistic effects between H⁻ (q/m=1/1) and D-/alpha (q/m=1/2) beams is made by movable iron inserts located in two valleys, as in IBA Cyclone 18/9 cyclotrons. These modifications could have an adverse effect on the flutter. In addition, the second harmonic induced by the movable iron inserts drives the machine in the 2.ν_r=2 resonance close to the extraction. As a consequence, modifications on the pole sectors and chamfers have been made in order to improve the flutter and eliminate the harmful resonance.

MOPCP072	Design of IBA Cyclone 11 Cyclotron Magnet	192
	V. Nuttens, M. Abs, W.J.G.M. Kleeven, B. Nactergal, D. Neuvéglise, T. Servais, S. Zaremba IBA, Louvain-la-Neuve, Belgium
	To extend customer choice in the low energy range, IBA is developing the Cyclone 11. It is a fixed energy 11 MeV H⁻ cyclotron for the production of PET isotopes. The cyclotron magnet is based on the well known Cyclone 10/5, with the same yoke dimensions, which is compatible with the IBA self-shielding design. The higher proton energy compared to the 10 MeV machine takes the benefit of the higher PET isotope production yield. This poster presents the Cyclone 10 magnet modifications required to reach 11 MeV. At first, the magnetic field has been raised by a small reduction of the valley depth. Additionally, the main coil current has been increased. The pole edge milling has been used to obtain the isochronous magnetic field shape. Beam optics in the magnet is excellent. Extraction is ensured by means of stripper foils mounted on carousels located at different azimuths allowing for up to eight targets.

MOPCP074	Upgrade of the IBA Cyclone 3D Cyclotron	197
	W.J.G.M. Kleeven, M. Abs, E. Forton, B. Nactergal, D. Neuvéglise, T. Servais, S. Zaremba IBA, Louvain-la-Neuve, Belgium
	There is a need for 15O generator producing a continuous flow of PET tracer without disrupting the schedule of the hospital main cyclotron (usually used for ¹⁸F and ¹¹C production) and to promote new emergency room evaluation of brain stroke and ischemic heart attack in PET centers without access to cyclotron short-lived isotopes. To answer, IBA improves the Cyclone 3D, originally developed for this purpose and accelerating D⁺ ions to more than 3 MeV. In the previous magnet design, vertical focusing is obtained by four straight pole-sectors. The new design has three spiralled pole-sectors. This improves the vertical focusing properties of the machine. Also the main coil and the return yoke are slightly modified. This will increase the extraction energy by about 10% from 3.3 MeV to 3.6 MeV. This new design will improve the transmission in the cyclotron and the extraction efficiency above 80%, using an electrostatic deflector. The goal is to obtain an extracted current of 50 μA with the prototype, then 70 μA for subsequent machines. This represents a doubling of the previous model performance. Results of magnetic field optimization and extraction calculations are presented.

Paper

Title

Page

Design of IBA Cyclone 30XP Cyclotron Magnet

189

E. Forton, M. Abs, W.J.G.M. Kleeven, B. Nactergal, D. Neuvéglise, S. Zaremba
IBA, Louvain-la-Neuve, Belgium

IBA is developing an evolution of its famous Cyclone 30 cyclotron. The Cyclone 30xp will be a multi-particle, multiport cyclotron capable of accelerating alpha particles up to 30 MeV, deuteron (D-) beams between 7.5 and 15 MeV and proton (H⁻) beams between 15 and 30 MeV. The magnet system has been improved with IBA Cyclone 18/9 and Cyclone 70 features. Coil dimensions have been updated in order to raise the free space in the median plane. This allows the mounting of a retractable electrostatic deflector system for the extraction of the alpha particle beam. Gradient corrector pole extensions have been added to ease the alpha beam extraction. Finally, compensation for relativistic effects between H⁻ (q/m=1/1) and D-/alpha (q/m=1/2) beams is made by movable iron inserts located in two valleys, as in IBA Cyclone 18/9 cyclotrons. These modifications could have an adverse effect on the flutter. In addition, the second harmonic induced by the movable iron inserts drives the machine in the 2.ν_r=2 resonance close to the extraction. As a consequence, modifications on the pole sectors and chamfers have been made in order to improve the flutter and eliminate the harmful resonance.

MOPCP072

Design of IBA Cyclone 11 Cyclotron Magnet

192

V. Nuttens, M. Abs, W.J.G.M. Kleeven, B. Nactergal, D. Neuvéglise, T. Servais, S. Zaremba
IBA, Louvain-la-Neuve, Belgium

To extend customer choice in the low energy range, IBA is developing the Cyclone 11. It is a fixed energy 11 MeV H⁻ cyclotron for the production of PET isotopes. The cyclotron magnet is based on the well known Cyclone 10/5, with the same yoke dimensions, which is compatible with the IBA self-shielding design. The higher proton energy compared to the 10 MeV machine takes the benefit of the higher PET isotope production yield. This poster presents the Cyclone 10 magnet modifications required to reach 11 MeV. At first, the magnetic field has been raised by a small reduction of the valley depth. Additionally, the main coil current has been increased. The pole edge milling has been used to obtain the isochronous magnetic field shape. Beam optics in the magnet is excellent. Extraction is ensured by means of stripper foils mounted on carousels located at different azimuths allowing for up to eight targets.

MOPCP074

Upgrade of the IBA Cyclone 3D Cyclotron

197

W.J.G.M. Kleeven, M. Abs, E. Forton, B. Nactergal, D. Neuvéglise, T. Servais, S. Zaremba
IBA, Louvain-la-Neuve, Belgium

There is a need for 15O generator producing a continuous flow of PET tracer without disrupting the schedule of the hospital main cyclotron (usually used for ¹⁸F and ¹¹C production) and to promote new emergency room evaluation of brain stroke and ischemic heart attack in PET centers without access to cyclotron short-lived isotopes. To answer, IBA improves the Cyclone 3D, originally developed for this purpose and accelerating D⁺ ions to more than 3 MeV. In the previous magnet design, vertical focusing is obtained by four straight pole-sectors. The new design has three spiralled pole-sectors. This improves the vertical focusing properties of the machine. Also the main coil and the return yoke are slightly modified. This will increase the extraction energy by about 10% from 3.3 MeV to 3.6 MeV. This new design will improve the transmission in the cyclotron and the extraction efficiency above 80%, using an electrostatic deflector. The goal is to obtain an extracted current of 50 μA with the prototype, then 70 μA for subsequent machines. This represents a doubling of the previous model performance. Results of magnetic field optimization and extraction calculations are presented.