CYCLOTRONS 2010 - List of Keywords (linac)

Paper	Title	Other Keywords	Page
MOPCP025	Construction of New Injector LINAC at RIBF	rfq, impedance, ion, vacuum	102
	K. Yamada, S. Arai, M. Fujimaki, T. Fujinawa, N. Fukunishi, A. Goto, Y. Higurashi, E. Ikezawa, O. Kamigaito, M. Kase, M. Komiyama, K. Kumagai, T. Maie, T. Nakagawa, J. Ohnishi, H. Okuno, N. Sakamoto, K. Suda, H. Watanabe, Y. Watanabe, Y. Yano, S. Yokouchi RIKEN Nishina Center, Wako, Japan H. Fujisawa Kyoto ICR, Uji, Kyoto, Japan Y. Sato KEK, Ibaraki, Japan
	A new additional linac injector called RILAC2 has been constructed at the RIKEN Nishina Center so that RIBF experiments and synthesis of super-heavy element can be carried out independently. The RILAC2 consists of a 28-GHz superconducting ECR ion source (SC-ECRIS), a low-energy beam transport with a prebuncher, a four-rod RFQ linac, three drift-tube linac tanks (DTL1-3), a rebuncher between the RFQ and DTL1, and strong quadrupole magnets that were placed between the rf resonators for the transverse focusing. Very heavy ions with mass-to-charge ratio of 7, such as ¹³⁶Xe²⁰⁺ and ²³⁸U³⁵⁺, are accelerated up to an energy of 680 keV/u in the cw mode and injected into the RRC without charge stripping. The rf resonators excluding the pre-buncher are operated at a fixed rf frequency of 36.5 MHz, whereas the pre-buncher is operated at 18.25 MHz. The basic design of the RILAC2 was finished in 2006 and the construction has started since the budget was approved at the end of FY2008. The SC-ECRIS is installed in a new room, and other equipments are placed in the existing AVF-cyclotron vault. This contribution mainly presents the details of the construction of linac part.

MOPCP105	Research on Acceptance of SSC	ion, simulation, injection, cyclotron	260
	X.N. Li, Y. He, Y.J. Yuan IMP, Lanzhou, People's Republic of China
	The injection, acceleration and extraction of SSC (Separate Sector Cyclotron) is analyzed and simulated to get the transverse and longitudinal acceptance, using two typical ions ²³⁸U³⁶⁺ and ⁷⁰Zn¹⁰⁺ with energy 9.7 MeV/u and 5.62 MeV/u respectively. In order to study the actual acceptance of SSC, the isochronous magnetic field model in coincidence with the real one is established by Kr-Kb and Lagrange methods based on the actual measurement. The transverse and longitudinal acceptance is calculated under the above isochronous magnetic field model. From the simulation results, one of the major reason of low efficiency and acceptance of SSC is the defaults in the design of MSI3. The simulation results show that the actual efficiency and acceptance of SSC can be improved by redesign the curvature of MSI3 or shim in MSI3 to change the distribution of inner magnetic field.

THM1CIO01	Post-acceleration of High Intensity RIB through the CIME Cyclotron in the Frame of the SPIRAL2 Project at GANIL	cyclotron, ion, acceleration, ion-source	354
	P. Bertrand, A. Savalle GANIL, Caen, France
	The cyclotron CIME is presently used at GANIL for the acceleration of SPIRAL1 radioactive beams. One of the goals of the SPIRAL2 project is to produce, post-accelerate and use in the existing experimental areas much higher intensity secondary beams induced by uranium fission like neutron-rich krypton, xenon, tin isotopes, and many others. Intensity may reach 10¹⁰ pps. Specific developments are needed for secondary beam diagnostics. Improvement of mass separation is also necessary, and the Vertical Mass Separator (VMS) is specially developed for this purpose. However, the main concern is related to the high radioactivity linked to RIB high intensity. Safety and radioprotection issues will require modifications of the installation with special care for the maintenance of the cyclotron. The experience of the SPIRAL1 beams, in terms of beam losses and equipment contamination, is especially useful to define the necessary modifications.
	Slides THM1CIO01 [6.133 MB]

THM1CIO02	Acceleration above the Coulomb Barrier - Completion of the ISAC-II Project at TRIUMF	acceleration, ion, vacuum, cyclotron	359
	R.E. Laxdal TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
	The ISAC-II project at TRIUMF was proposed to boost the final energy of the radioactive ion beams of the TRIUMF ISAC facility above the Coulomb barrier. The nominal goal of 6.5 MeV/u for ions with A/q=6 was recently achieved. The ISAC-II post-accelerator consists of 40 MV of installed heavy ion superconducting linac to broaden the energy reach and a charge state booster to broaden the mass reach. Details of the project and the ISAC-II commissioning and operation will be presented.
	Slides THM1CIO02 [3.619 MB]

Paper

Title

Other Keywords

Page

MOPCP025

Construction of New Injector LINAC at RIBF

rfq, impedance, ion, vacuum

102

K. Yamada, S. Arai, M. Fujimaki, T. Fujinawa, N. Fukunishi, A. Goto, Y. Higurashi, E. Ikezawa, O. Kamigaito, M. Kase, M. Komiyama, K. Kumagai, T. Maie, T. Nakagawa, J. Ohnishi, H. Okuno, N. Sakamoto, K. Suda, H. Watanabe, Y. Watanabe, Y. Yano, S. Yokouchi
RIKEN Nishina Center, Wako, Japan
H. Fujisawa
Kyoto ICR, Uji, Kyoto, Japan
Y. Sato
KEK, Ibaraki, Japan

A new additional linac injector called RILAC2 has been constructed at the RIKEN Nishina Center so that RIBF experiments and synthesis of super-heavy element can be carried out independently. The RILAC2 consists of a 28-GHz superconducting ECR ion source (SC-ECRIS), a low-energy beam transport with a prebuncher, a four-rod RFQ linac, three drift-tube linac tanks (DTL1-3), a rebuncher between the RFQ and DTL1, and strong quadrupole magnets that were placed between the rf resonators for the transverse focusing. Very heavy ions with mass-to-charge ratio of 7, such as ¹³⁶Xe²⁰⁺ and ²³⁸U³⁵⁺, are accelerated up to an energy of 680 keV/u in the cw mode and injected into the RRC without charge stripping. The rf resonators excluding the pre-buncher are operated at a fixed rf frequency of 36.5 MHz, whereas the pre-buncher is operated at 18.25 MHz. The basic design of the RILAC2 was finished in 2006 and the construction has started since the budget was approved at the end of FY2008. The SC-ECRIS is installed in a new room, and other equipments are placed in the existing AVF-cyclotron vault. This contribution mainly presents the details of the construction of linac part.

MOPCP105

Research on Acceptance of SSC

ion, simulation, injection, cyclotron

260

X.N. Li, Y. He, Y.J. Yuan
IMP, Lanzhou, People's Republic of China

The injection, acceleration and extraction of SSC (Separate Sector Cyclotron) is analyzed and simulated to get the transverse and longitudinal acceptance, using two typical ions ²³⁸U³⁶⁺ and ⁷⁰Zn¹⁰⁺ with energy 9.7 MeV/u and 5.62 MeV/u respectively. In order to study the actual acceptance of SSC, the isochronous magnetic field model in coincidence with the real one is established by Kr-Kb and Lagrange methods based on the actual measurement. The transverse and longitudinal acceptance is calculated under the above isochronous magnetic field model. From the simulation results, one of the major reason of low efficiency and acceptance of SSC is the defaults in the design of MSI3. The simulation results show that the actual efficiency and acceptance of SSC can be improved by redesign the curvature of MSI3 or shim in MSI3 to change the distribution of inner magnetic field.

THM1CIO01

Post-acceleration of High Intensity RIB through the CIME Cyclotron in the Frame of the SPIRAL2 Project at GANIL

cyclotron, ion, acceleration, ion-source

354

P. Bertrand, A. Savalle
GANIL, Caen, France

The cyclotron CIME is presently used at GANIL for the acceleration of SPIRAL1 radioactive beams. One of the goals of the SPIRAL2 project is to produce, post-accelerate and use in the existing experimental areas much higher intensity secondary beams induced by uranium fission like neutron-rich krypton, xenon, tin isotopes, and many others. Intensity may reach 10¹⁰ pps. Specific developments are needed for secondary beam diagnostics. Improvement of mass separation is also necessary, and the Vertical Mass Separator (VMS) is specially developed for this purpose. However, the main concern is related to the high radioactivity linked to RIB high intensity. Safety and radioprotection issues will require modifications of the installation with special care for the maintenance of the cyclotron. The experience of the SPIRAL1 beams, in terms of beam losses and equipment contamination, is especially useful to define the necessary modifications.

Slides THM1CIO01 [6.133 MB]

THM1CIO02

Acceleration above the Coulomb Barrier - Completion of the ISAC-II Project at TRIUMF

acceleration, ion, vacuum, cyclotron

359

R.E. Laxdal
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada

The ISAC-II project at TRIUMF was proposed to boost the final energy of the radioactive ion beams of the TRIUMF ISAC facility above the Coulomb barrier. The nominal goal of 6.5 MeV/u for ions with A/q=6 was recently achieved. The ISAC-II post-accelerator consists of 40 MV of installed heavy ion superconducting linac to broaden the energy reach and a charge state booster to broaden the mass reach. Details of the project and the ISAC-II commissioning and operation will be presented.

Slides THM1CIO02 [3.619 MB]