IPAC2011 - List of Authors (Uesugi, T.)

Paper	Title	Page
MOPC158	RF Capture of a Beam with Charge-exchanging Multi-turn Injection	454
	T. Uesugi, Y. Ishi, Y. Kuriyama, J.-B. Lagrange, Y. Mori, R. Nakano, T. Planche, B. Qin, E. Yamakawa KURRI, Osaka, Japan Y. Niwa, K. Okabe, I. Sakai University of Fukui, Faculty of Engineering, Fukui, Japan
	Funding: This work was supported by MEXT of Japan in the framework of a task entitled ”Research and Development for an Accelerator-Driven Sub-critical System Using an FFAG Accelerator”. In the fixed field alternating gradient (FFAG) synchrotron in Kyoto university research reactor Institute (KURRI), charge exchange injection was adopted since 2011. The charge stripping foil is located on the closed orbit of the injection energy, and no bump orbit system is used. Instead, the injected beam escapes from the stripping foil according to the closed-orbit shift due to acceleration. In this scheme, it is important to minimize the number of foil hitting, which causes emittance growth and foil heating. In this paper, the rf capture is studied by means of simulation.

WEPS074	H⁻ Injection Studies of FFAG Accelerator at KURRI	2676
	K. Okabe, Y. Niwa, I. Sakai University of Fukui, Faculty of Engineering, Fukui, Japan Y. Ishi, Y. Kuriyama, J.-B. Lagrange, Y. Mori, R. Nakano, B. Qin, T. Uesugi, E. Yamakawa KURRI, Osaka, Japan
	Aiming to demonstrate the basic feasibility of the accelerator driven sub-critical reactor (ADSR), proton Fixed Field Alternating Gradient (FFAG) accelerator complex as a neutron production driver has been constructed in Kyoto University Research Reactor Institute (KURRI). In order to upgrade beam power of the FFAG neutron source, a project about a new H⁻ linac injector for FFAG main ring instead of present injector has been started. A charge exchange multi-turn beam injection has been performed for the first time at FFAG main ring in KURRI. In this paper, the detail of injection system and beam study of low energy H⁻ injection at FFAG is described.

WEPS076	Straight Scaling FFAG	2682
	J.-B. Lagrange, Y. Ishi, Y. Kuriyama, Y. Mori, T. Planche, B. Qin, T. Uesugi, E. Yamakawa KURRI, Osaka, Japan K. Okabe University of Fukui, Faculty of Engineering, Fukui, Japan A. Sardet, R. Wasef LPSC, Grenoble Cedex, France
	Recent developments in scaling fixed field alternating gradient (FFAG) accelerators have opened new ways for lattice design, with straight sections, and insertions like dispersion suppressors. An experiment to study straight sections and dispersion suppressors is under progress at KURRI.

WEPS077	Present Status of FFAG Proton Accelerator at KURRI*	2685
	Y. Mori, Y. Ishi, Y. Kuriyama, J.-B. Lagrange, R. Nakano, T. Planche, T. Uesugi, E. Yamakawa KURRI, Osaka, Japan Y. Niwa, K. Okabe, I. Sakai University of Fukui, Faculty of Engineering, Fukui, Japan
	The 150MeV FFAG proton accelerator has been developed at Kyoto University Research Reactor Institute(KURRI) for the fundamental study of Accelerator Driven Sub-crittical Reactor (ADSR). Recently, a new H⁻ injector was constructed to improve the beam quality and intensity. The paper will describe the detail of the preset status of FFAG proton accelerator at KURRI.

WEPS078	Compact FFAG Accelerators for Medium Energy Hadron Applications	2688
	B. Qin, Y. Ishi, Y. Kuriyama, J.-B. Lagrange, Y. Mori, K. Okabe, T. Uesugi, E. Yamakawa KURRI, Osaka, Japan
	Funding: This work was supported by Japan Science and Technology Agency under Strategic Promotion of Innovative Research and Development Program. Medium energy hadron beams are widely applied in accelerator driven subcritical systems (ADSR), high intensity neutron sources and carbon therapy. Compactness feature is important for this energy region, especially in the case of medical use purposes. This paper introduces a novel superferric scheme with scaling fixed-field alternating gradient (FFAG) accelerators, which can deliver 400MeV/u carbon ions or 1.2GeV protons. By using high permeability materials, 5T magnetic field with high field index can be achieved to reduce accelerator circumference significantly. The lattice configuration and design of superferric magnet are described in details.

WEPS079	Serpentine Acceleration in Scaling FFAG	2691
	E. Yamakawa, Y. Ishi, Y. Kuriyama, J.-B. Lagrange, Y. Mori, R. Nakano, T. Planche, B. Qin, T. Uesugi KURRI, Osaka, Japan K. Okabe, I. Sakai University of Fukui, Faculty of Engineering, Fukui, Japan
	A serpentine acceleration in scaling FFAG accelerator has been examined. In this scheme, high-energy and high-current beam can be obtained in non-relativistic energy region. Longitudinal hamiltonian is also derived analytically.

Paper

Title

Page

RF Capture of a Beam with Charge-exchanging Multi-turn Injection

454

T. Uesugi, Y. Ishi, Y. Kuriyama, J.-B. Lagrange, Y. Mori, R. Nakano, T. Planche, B. Qin, E. Yamakawa
KURRI, Osaka, Japan
Y. Niwa, K. Okabe, I. Sakai
University of Fukui, Faculty of Engineering, Fukui, Japan

Funding: This work was supported by MEXT of Japan in the framework of a task entitled ”Research and Development for an Accelerator-Driven Sub-critical System Using an FFAG Accelerator”.
In the fixed field alternating gradient (FFAG) synchrotron in Kyoto university research reactor Institute (KURRI), charge exchange injection was adopted since 2011. The charge stripping foil is located on the closed orbit of the injection energy, and no bump orbit system is used. Instead, the injected beam escapes from the stripping foil according to the closed-orbit shift due to acceleration. In this scheme, it is important to minimize the number of foil hitting, which causes emittance growth and foil heating. In this paper, the rf capture is studied by means of simulation.

WEPS074

H⁻ Injection Studies of FFAG Accelerator at KURRI

2676

K. Okabe, Y. Niwa, I. Sakai
University of Fukui, Faculty of Engineering, Fukui, Japan
Y. Ishi, Y. Kuriyama, J.-B. Lagrange, Y. Mori, R. Nakano, B. Qin, T. Uesugi, E. Yamakawa
KURRI, Osaka, Japan

Aiming to demonstrate the basic feasibility of the accelerator driven sub-critical reactor (ADSR), proton Fixed Field Alternating Gradient (FFAG) accelerator complex as a neutron production driver has been constructed in Kyoto University Research Reactor Institute (KURRI). In order to upgrade beam power of the FFAG neutron source, a project about a new H⁻ linac injector for FFAG main ring instead of present injector has been started. A charge exchange multi-turn beam injection has been performed for the first time at FFAG main ring in KURRI. In this paper, the detail of injection system and beam study of low energy H⁻ injection at FFAG is described.

WEPS076

Straight Scaling FFAG

2682

J.-B. Lagrange, Y. Ishi, Y. Kuriyama, Y. Mori, T. Planche, B. Qin, T. Uesugi, E. Yamakawa
KURRI, Osaka, Japan
K. Okabe
University of Fukui, Faculty of Engineering, Fukui, Japan
A. Sardet, R. Wasef
LPSC, Grenoble Cedex, France

Recent developments in scaling fixed field alternating gradient (FFAG) accelerators have opened new ways for lattice design, with straight sections, and insertions like dispersion suppressors. An experiment to study straight sections and dispersion suppressors is under progress at KURRI.

WEPS077

Present Status of FFAG Proton Accelerator at KURRI*

2685

Y. Mori, Y. Ishi, Y. Kuriyama, J.-B. Lagrange, R. Nakano, T. Planche, T. Uesugi, E. Yamakawa
KURRI, Osaka, Japan
Y. Niwa, K. Okabe, I. Sakai
University of Fukui, Faculty of Engineering, Fukui, Japan

The 150MeV FFAG proton accelerator has been developed at Kyoto University Research Reactor Institute(KURRI) for the fundamental study of Accelerator Driven Sub-crittical Reactor (ADSR). Recently, a new H⁻ injector was constructed to improve the beam quality and intensity. The paper will describe the detail of the preset status of FFAG proton accelerator at KURRI.

WEPS078

Compact FFAG Accelerators for Medium Energy Hadron Applications

2688

B. Qin, Y. Ishi, Y. Kuriyama, J.-B. Lagrange, Y. Mori, K. Okabe, T. Uesugi, E. Yamakawa
KURRI, Osaka, Japan

Funding: This work was supported by Japan Science and Technology Agency under Strategic Promotion of Innovative Research and Development Program.
Medium energy hadron beams are widely applied in accelerator driven subcritical systems (ADSR), high intensity neutron sources and carbon therapy. Compactness feature is important for this energy region, especially in the case of medical use purposes. This paper introduces a novel superferric scheme with scaling fixed-field alternating gradient (FFAG) accelerators, which can deliver 400MeV/u carbon ions or 1.2GeV protons. By using high permeability materials, 5T magnetic field with high field index can be achieved to reduce accelerator circumference significantly. The lattice configuration and design of superferric magnet are described in details.

WEPS079

Serpentine Acceleration in Scaling FFAG

2691

E. Yamakawa, Y. Ishi, Y. Kuriyama, J.-B. Lagrange, Y. Mori, R. Nakano, T. Planche, B. Qin, T. Uesugi
KURRI, Osaka, Japan
K. Okabe, I. Sakai
University of Fukui, Faculty of Engineering, Fukui, Japan

A serpentine acceleration in scaling FFAG accelerator has been examined. In this scheme, high-energy and high-current beam can be obtained in non-relativistic energy region. Longitudinal hamiltonian is also derived analytically.