04 Hadron Accelerators

A12 FFAG, Cyclotrons

Paper	Title	Page
TUOBM04	FFAGs for the ERIT and ADS Projects at KURRI	1013
	T. Uesugi, H. Horii, Y. Kuriyama, K. Mishima, Y. Mori, A. Osanai, T. Planche, S. Shiroya, M. Tanigaki, H. Yoshino KURRI, Osaka M. Inoue SLLS, Shiga Y. Ishi Mitsubishi Electric Corp, Energy & Public Infrastructure Systems Center, Kobe M. Muto FFAG DDS Research Organization, Tokyo K. Okabe, I. Sakai University of Fukui, Faculty of Engineering, Fului
	A chain of FFAG proton accelerator have been under construction at Kyoto University Research Reactor Institute (KURRI), Osaka, for the study of accelerator driven system (ADS) since 2004. The accelerator is a cascade type and composed of three different FFAG rings: injector, booster and main ring. The maximum energy of the main ring is 150 MeV for proton. The beam was successfully accelerated and extracted from the booster in June of 2006 and the beam commissioning of the main ring has started since then. Recently the beam has been successfully injected into the main ring.
	Slides
THPP060	Simultaneous Extraction of Two Stable Beams for ISAC	3503
	G. Dutto, R. A. Baartman, P. G. Bricault, I. V. Bylinskii, A. Hurst, R. E. Laxdal, Y.-N. Rao, L. W. Root, P. Schmor, G. M. Stinson TRIUMF, Vancouver J. M. Schippers PSI, Villigen
	The TRIUMF cyclotron was originally conceived for several proton beams extracted simultaneously at different energies. Recent operation includes a 500 MeV beam up to150 μA for meson users, a 500 MeV beam up to 80 μA for rare isotope production, and a 100 MeV beam up to 70μA for medical isotopes. The extraction of an additional high intensity proton beam, at an energy between 450 and 500 MeV for ISAC has now been given priority. With the rare ions produced from the existing and future primary beam lines, we will be able to operate two of the existing experimental areas simultaneously. Upgrading the cyclotron for higher intensity is in progress. A necessary goal for ISAC is the extraction of both primary proton beams with stability better than 1% to allow the highest possible temperatures to be reliably maintained at the ion production targets. A successful solution implemented for the existing primary ISAC beam has been simulated to be adaptable for both primary beams, given the particular angular separation between the two strippers in the cyclotron. Progress on intensity and stability studies and the layout of the extraction system will be presented.
THPP063	Possible Particle Distributions at the Entrance of the Cyclotron Spiral Inflector	3506
	N. Yu. Kazarinov, I. A. Ivanenko JINR, Dubna, Moscow Region
	The transverse particle distribution of the ion beam produced in the Electron Cyclotron Resonance Ion Source (ECRIS) is considered. It is shown that the beam emittance at the entrance of the cyclotron spiral inflector is strongly dependent on directions of both the ECRIS and cyclotron magnetic fields. The changing of the beam rms emittance and bunch lengthening in the spiral inflector for every considered distribution are obtained in the computer simulation.
THPP065	3D Simulation of the Axial Injection Beam Line of DC350 Cyclotron	3509
	N. Yu. Kazarinov, V. Aleksandrov, V. Shevtsov, A. Tuzikov JINR, Dubna, Moscow Region
	DC-350 is the novel cyclotron designed in Flerov Laboratory of Nuclear Reaction of Joint Institute for Nuclear Research. It is intended for the nuclear and applied physics experiments. The axial injection channel of the DC-350 cyclotron gives possibility for transportation of the high intensity ion beam from Li to Bi obtained in the superconducting ECR-ion source (SECR). The beam focusing in the beam line after the analyzing bending magnet is provided by solenoidal lenses. The linear and sinusoidal bunchers installed in the vertical part of the channel are used for increasing of the accelerating efficiency. The 3D simulation results of the focusing and bunching systems of the axial injection beam line are presented.
THPP067	An Intense Neutron Source with Emittance Recovery Internal Target (ERIT) Using Ionization Cooling	3512
	Y. Mori KURRI, Osaka M. Muto FFAG DDS Research Organization, Tokyo K. Okabe University of Fukui, Faculty of Engineering, Fului
	An intense neutron source with emittance recovery internal target (ERIT) using ionization cooler ring has been developed at Kyoto University Research Reactor Institute (KURRI) for boron neutron capture therapy (BNCT). The neutron source consists of a 11MeV H- linac and a FFAG storage ring. A thin (10micron) Be target is placed in the ring. In order to reduce an emittance growth caused by multiple scattering at the target, an ionization cooling with a low frequency and high voltage RF cavity is utilized. The beam is expected to be survived for more than 500 turns in the ring, which can increase beam efficiency largely to reduce an injected beam current.
THPP068	Acceleration in spiral FFAG using field map data	3515
	J. Pasternak, J. Fourrier LPSC, Grenoble F. Meot CEA, Gif-sur-Yvette
	This paper presents beam dynamics studies regarding the variable energy operation of a spiral scaling FFAG (Fixed Field Alternating Gradient) accelerator designed for producing 70 to 180 MeV protons and acceleration simulations for different operation modes, corresponding to different extraction energies.
THPP069	Status of the Superconducting Ring Cyclotron at RIKEN RI Beam Factory	3518
	K. Yamada, M. K. Fujimaki, N. Fukunishi, A. Goto, H. Hasebe, K. Ikegami, O. Kamigaito, M. Kase, K. Kumagai, T. Maie, M. Nagase, J. Ohnishi, N. S. Sakamoto, Y. Yano, S. Yokouchi RIKEN, Wako, Saitama H. Okuno RIKEN/RARF/CC, Saitama
	A superconducting ring cyclotron (SRC) was successfully commissioned to work as the final energy booster of the RI beam factory (RIBF) in RIKEN. SRC is the world's first ring cyclotron that uses superconducting magnets, and has the strongest beam bending force among the cyclotrons. It can boost the ion beam energy up to 440 MeV/nucleon for light ions and 350 MeV/nucleon for very heavy ions such as uranium nuclei to produce intense radioactive beams. The ring cyclotron consists of 6 major superconducting sector magnets with a maximum field of 3.8T. The total stored energy is 240MJ, and its overall sizes are 19 m diameter, 8 m height and 8,100 tons. The magnet system assembly was completed in August 2005, and successfully reached the maximum field in November 2005. After magnetic field measurements for two months, the other hardware than the superconducting magnets was installed. The first beam was extracted from SRC on 12/28/2006. From May 2007 we started to supply uranium beams to nuclear scientist to produce RI beams. This talk will describe the milestones that were achieved during the commissioning as well as some of the issues that still need to be resolved.
THPP070	Status of Center for Accelerator and Beam Applied Science of Kyushu University	3521
	Y. Yonemura, H. Arima, N. Ikeda, K. Ishibashi, H. Ishikawa, K. Maehata, T. Okai, N. Shigyo, Y. Uozumi, G. Wakabayashi Kyushu University, Department of Applied Quantum Physics and Nuclear Engineering, Fukuoka S. Fukumoto, Y. Kimura, H. Nakayama, A. Takagi KEK, Ibaraki Y. Mori KURRI, Osaka T. Noro, K. Sagara Kyushu University, Fukuoka T. Tomimasu SAGA, Tosu
	A new accelerator facility of Center for Accelerator and Beam Applied Science is under construction on Ito Campus to promote research and education activities at Kyushu University. The facility consists mainly of a 10 MeV proton cyclotron as an injector and a 150 MeV Fixed Field Alternating Gradient (FFAG) accelerator, which was developed at KEK as a prototype of proton FFAG for various applications. In this paper, the status of the development of devices and the facility is described.