CYCLOTRONS 2010 - List of Keywords (betatron)

Paper	Title	Other Keywords	Page
MOPCP072	Design of IBA Cyclone 11 Cyclotron Magnet	cyclotron, extraction, proton, ion	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	cyclotron, extraction, ion, target	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.

MOPCP079	Optimization of Sector Geometry of a Compact Cyclotron by Random Search Method	cyclotron, proton, extraction, ion-source	212
	P. Sing Babu, A. Goswami, V.S. Pandit, P.R. Sarma DAE/VECC, Calcutta, India
	A compact four sector 10 MeV, 5 mA proton cyclotron is being developed at VECC, Kolkata. Proton beam at 80keV from a 2.45 GHz ion source (under testing) will be first collimated and bunched and will be injected axially in the central region where a spiral inflector will place the beam on the orbit. This paper describes the procedure of optimizing the sector geometry of the magnet to obtain the desired isochronous field. Due to fringe field effect, analytical formulae do not predict the correct sector shape particularly at the lower radii in the cases of compact cyclotrons, where hill gap is very small and valley gap is large. Hence a 3D code becomes necessary to obtain the correct shape and size of the magnet sectors. This involves a lengthy iterative procedure of determining the hill angle at a large number of radii. In our procedure magnet sector is described in terms of a small number of parameters which are iteratively determined by random search technique geared to minimize the frequency error. 3D magnetic field data and results of equilibrium orbit code are used as input to the code developed for the optimization.

THA1CIO01	FFAG Developments in Japan	acceleration, proton, optics, lattice	376
	Y. Mori KURRI, Osaka, Japan
	Recent activities of the research and development works on FFAG accelerators in Japan are reviewed in this talk.
	Slides THA1CIO01 [27.606 MB]

Paper

Title

Other Keywords

Page

MOPCP072

Design of IBA Cyclone 11 Cyclotron Magnet

cyclotron, extraction, proton, ion

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

cyclotron, extraction, ion, target

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.

MOPCP079

Optimization of Sector Geometry of a Compact Cyclotron by Random Search Method

cyclotron, proton, extraction, ion-source

212

P. Sing Babu, A. Goswami, V.S. Pandit, P.R. Sarma
DAE/VECC, Calcutta, India

A compact four sector 10 MeV, 5 mA proton cyclotron is being developed at VECC, Kolkata. Proton beam at 80keV from a 2.45 GHz ion source (under testing) will be first collimated and bunched and will be injected axially in the central region where a spiral inflector will place the beam on the orbit. This paper describes the procedure of optimizing the sector geometry of the magnet to obtain the desired isochronous field. Due to fringe field effect, analytical formulae do not predict the correct sector shape particularly at the lower radii in the cases of compact cyclotrons, where hill gap is very small and valley gap is large. Hence a 3D code becomes necessary to obtain the correct shape and size of the magnet sectors. This involves a lengthy iterative procedure of determining the hill angle at a large number of radii. In our procedure magnet sector is described in terms of a small number of parameters which are iteratively determined by random search technique geared to minimize the frequency error. 3D magnetic field data and results of equilibrium orbit code are used as input to the code developed for the optimization.

THA1CIO01

FFAG Developments in Japan

acceleration, proton, optics, lattice

376

Y. Mori
KURRI, Osaka, Japan

Recent activities of the research and development works on FFAG accelerators in Japan are reviewed in this talk.

Slides THA1CIO01 [27.606 MB]