ECRIS2012 - List of Keywords (solenoid)

Paper	Title	Other Keywords	Page
WEZO02	Design of new 18 GHz ECR for RIKEN RIBF	ion, plasma, ion-source, ECRIS	114
	K. Ozeki, Y. Higurashi, T. Nakagawa, J. Ohnishi RIKEN Nishina Center, Wako, Japan
	In RIKEN RIBF, we plan to install a new 18 GHz ECR ion source, which supply the intense beam of highly charged heavy ion beam into the linear accelerator RILAC. By equipping two ion sources, it is expected to be able to develop new beams while we produce the beam for the experiment of RIBF. Based on the structure of 18 GHz ECR ion source which have been developed in RIKEN, this ion source has additional features as follows: Owing to three solenoid coils, Bext can be adjusted while Bmin is fixed to an optimum value. We adopt the variable frequency (17.2-18.4 GHz) RF power source. Therefore, further enhancement of the beam intensity is expected because the frequency band suited to a size of plasma chamber is selectable, In order to simplify the maintenance work, we improved a structure of the chamber. In this contribution, we report the design of new ion source in detail.
	Slides WEZO02 [10.113 MB]

THXO01	Optimization of the New SC Magnetic Structure Design with a Hybrid Magnet	injection, ECRIS, plasma, sextupole	149
	D. Xie, W. Lu, L.Z. Ma, L.T. Sun, X.Z. Zhang, H.W. Zhao, L. Zhu IMP, Lanzhou, People's Republic of China
	In the development of the next generation ECRISs, so far either a set of full NbTi or full Nb₃Sn magnets has been proposed to construct the magnet system. However, the single set of magnets may not be the optimum in terms of the field strength and configuration. An optimization of the new SC magnetic structure with a set of hybrid magnets (NbTi and Nb₃Sn) is being investigated. With the hybrid magnet the optimized new magnetic system is capable of producing field maxima of 9.0 T on axis and 4.0 T at the plasma wall, which are 30 and 10% higher than the previously proposed magnetic structure to be built with a set of full NbTi magnets. In addition, the axial length of the optimized magnetic structure has been slightly shrunk resulting in a more compact system. This new magnetic field profile is high enough for operation frequency up to 56 GHz. The design features and the preliminary force/stress analyses of the optimized new SC magnetic structure will be presented and discussed.
	Slides THXO01 [2.603 MB]

THYO03	Design Status of ECR Ion Sources and LEBT for FRIB	ion, ion-source, ECR, sextupole	172
	G. Machicoane, N.K. Bultman, G. Morgan, E. Pozdeyev, X. Rao FRIB, East Lansing, Michigan, USA J.Y. Benitez, C.M. Lyneis LBNL, Berkeley, California, USA L.T. Sun IMP, Lanzhou, People's Republic of China
	Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661 The Facility for Rare Isotope Beams at Michigan State University is currently being designed and will provide intense beams of rare isotopes for research in nuclear physics, nuclear astrophysics and study of fundamental interactions. The FRIB driver linac will accelerate all stable isotopes from Oxygen to Uranium to energies beyond 200 MeV/u at beam powers up to 400 kW. In the case of Uranium about 13.3 pμA of U³³⁺ are required from the ion source to reach the maximum beam power on the target. Such current is at the limit of what an ECR ion source can produce and led us to design the FRIB driver linac to accelerate concurrently two charges. The ECR ion source for FRIB will be based on the VENUS ion source developed at Lawrence Berkeley National Laboratory (LBNL). Recent beam measurements done with VENUS have demonstrated that the ion source can actually produce close to 13pμA of U³³⁺ and therefore could possibly meet the current required for FRIB in one charge state. This paper reviews the status of the FRIB ECR ion source and the modifications that have been made to the VENUS ion source design. The Low energy beam line transport (LEBT) will also be presented and discussed.
	Slides THYO03 [6.532 MB]

FRXA01	High Intensity Beam Production at CEA/Saclay for the IFMIF Project	rfq, plasma, extraction, emittance	182
	R. Gobin, G. Adroit, D. Bogard, N. Chauvin, O. Delferrière, Y. Gauthier, P. Girardot, F. Harrault, J.L. Jannin, D. Loiseau, P. Mattei, A. Roger, F. Senée, O. Tuske CEA/DSM/IRFU, France
	At CEA/Saclay, IRFU institute is in charge of the design, construction and characterization of the 140 mA continuous deuteron Injector for the IFMIF project. This injector includes the source and the low energy beam line (LEBT) with its own diagnostics. The Electron Cyclotron Resonance (ECR) ion source operates at 2.45 GHz and the 2 m long LEBT is based on 2 solenoids. Krypton gas injection in the beam line is foreseen in order to reach a high level of space charge compensation for the beam matching at the RFQ entrance. During the last months hydrogen beam has been produced in pulsed and continuous mode and the beam diagnostics have been installed and commissioned. Recently a 125 mA-100 keV pulsed deuteron beam has been produced with a 1% duty cycle. In this article, the high intensity proton and deuteron beam characterization will be presented.
	Slides FRXA01 [9.797 MB]

Paper

Title

Other Keywords

Page

WEZO02

Design of new 18 GHz ECR for RIKEN RIBF

ion, plasma, ion-source, ECRIS

114

K. Ozeki, Y. Higurashi, T. Nakagawa, J. Ohnishi
RIKEN Nishina Center, Wako, Japan

In RIKEN RIBF, we plan to install a new 18 GHz ECR ion source, which supply the intense beam of highly charged heavy ion beam into the linear accelerator RILAC. By equipping two ion sources, it is expected to be able to develop new beams while we produce the beam for the experiment of RIBF. Based on the structure of 18 GHz ECR ion source which have been developed in RIKEN, this ion source has additional features as follows:

Owing to three solenoid coils, Bext can be adjusted while Bmin is fixed to an optimum value.
We adopt the variable frequency (17.2-18.4 GHz) RF power source. Therefore, further enhancement of the beam intensity is expected because the frequency band suited to a size of plasma chamber is selectable,
In order to simplify the maintenance work, we improved a structure of the chamber.

In this contribution, we report the design of new ion source in detail.

Slides WEZO02 [10.113 MB]

THXO01

Optimization of the New SC Magnetic Structure Design with a Hybrid Magnet

injection, ECRIS, plasma, sextupole

149

D. Xie, W. Lu, L.Z. Ma, L.T. Sun, X.Z. Zhang, H.W. Zhao, L. Zhu
IMP, Lanzhou, People's Republic of China

In the development of the next generation ECRISs, so far either a set of full NbTi or full Nb₃Sn magnets has been proposed to construct the magnet system. However, the single set of magnets may not be the optimum in terms of the field strength and configuration. An optimization of the new SC magnetic structure with a set of hybrid magnets (NbTi and Nb₃Sn) is being investigated. With the hybrid magnet the optimized new magnetic system is capable of producing field maxima of 9.0 T on axis and 4.0 T at the plasma wall, which are 30 and 10% higher than the previously proposed magnetic structure to be built with a set of full NbTi magnets. In addition, the axial length of the optimized magnetic structure has been slightly shrunk resulting in a more compact system. This new magnetic field profile is high enough for operation frequency up to 56 GHz. The design features and the preliminary force/stress analyses of the optimized new SC magnetic structure will be presented and discussed.

Slides THXO01 [2.603 MB]

THYO03

Design Status of ECR Ion Sources and LEBT for FRIB

ion, ion-source, ECR, sextupole

172

G. Machicoane, N.K. Bultman, G. Morgan, E. Pozdeyev, X. Rao
FRIB, East Lansing, Michigan, USA
J.Y. Benitez, C.M. Lyneis
LBNL, Berkeley, California, USA
L.T. Sun
IMP, Lanzhou, People's Republic of China

Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661
The Facility for Rare Isotope Beams at Michigan State University is currently being designed and will provide intense beams of rare isotopes for research in nuclear physics, nuclear astrophysics and study of fundamental interactions. The FRIB driver linac will accelerate all stable isotopes from Oxygen to Uranium to energies beyond 200 MeV/u at beam powers up to 400 kW. In the case of Uranium about 13.3 pμA of U³³⁺ are required from the ion source to reach the maximum beam power on the target. Such current is at the limit of what an ECR ion source can produce and led us to design the FRIB driver linac to accelerate concurrently two charges. The ECR ion source for FRIB will be based on the VENUS ion source developed at Lawrence Berkeley National Laboratory (LBNL). Recent beam measurements done with VENUS have demonstrated that the ion source can actually produce close to 13pμA of U³³⁺ and therefore could possibly meet the current required for FRIB in one charge state. This paper reviews the status of the FRIB ECR ion source and the modifications that have been made to the VENUS ion source design. The Low energy beam line transport (LEBT) will also be presented and discussed.

Slides THYO03 [6.532 MB]

FRXA01

High Intensity Beam Production at CEA/Saclay for the IFMIF Project

rfq, plasma, extraction, emittance

182

R. Gobin, G. Adroit, D. Bogard, N. Chauvin, O. Delferrière, Y. Gauthier, P. Girardot, F. Harrault, J.L. Jannin, D. Loiseau, P. Mattei, A. Roger, F. Senée, O. Tuske
CEA/DSM/IRFU, France

At CEA/Saclay, IRFU institute is in charge of the design, construction and characterization of the 140 mA continuous deuteron Injector for the IFMIF project. This injector includes the source and the low energy beam line (LEBT) with its own diagnostics. The Electron Cyclotron Resonance (ECR) ion source operates at 2.45 GHz and the 2 m long LEBT is based on 2 solenoids. Krypton gas injection in the beam line is foreseen in order to reach a high level of space charge compensation for the beam matching at the RFQ entrance. During the last months hydrogen beam has been produced in pulsed and continuous mode and the beam diagnostics have been installed and commissioned. Recently a 125 mA-100 keV pulsed deuteron beam has been produced with a 1% duty cycle. In this article, the high intensity proton and deuteron beam characterization will be presented.

Slides FRXA01 [9.797 MB]