IPAC2014 - Classification: 04 Hadron Accelerators / A13 Cyclotrons

Paper	Title	Page
MOPRI078	High Power Cyclotrons for Neutrino Experiments	788
	D. Winklehner, J.R. Alonso, W.A. Barletta, A. Calanna, J.M. Conrad MIT, Cambridge, Massachusetts, USA A. Adelmann PSI, Villigen PSI, Switzerland L. Calabretta, D. Campo INFN/LNS, Catania, Italy M. Shaevitz Columbia University, New York, USA J.J. Yang CIAE, Beijing, People's Republic of China
	DAEδALUS* and IsoDAR** experiments needs large intense neutrino fluxes to investigate respectively the CP-Violation in the neutrino sector and the existence of sterile neutrino. DAEδALUS requires three neutrino sources driven by proton beams of ~800 MeV at powers of several megawatts placed at distances of 1.5, 8 and 20 km from the detector. Two cyclotrons working in cascade are chosen to deliver these high power beams. The first cyclotron accelerates the H²⁺ ions beam up to 60 MeV/amu. The beam is then extracted with an electrostatic deflector and reaccelerated up to 800 MeV/amu through a superconducting ring cyclotron. The acceleration of H²⁺ has two advantages: it reduces the space charge effect along the injection and acceleration inside the first cyclotron and allows the extraction of the beam from the last accelerator using a stripper foil. The injector cyclotron can be used in stand-alone mode to drive the IsoDAR experiment, which needs the accelerator placed near an underground neutrino detector. The design and the results of beam dynamic simulations will be shown. the results of preliminary injection and acceleration tests into a cyclotron test bench will be presented. * J. Alonso et al., arXiv:1006.0260[physics.ins-det] (2010). ** A. Bungau et al., Phys. Rev. Lett. 109 141802 (2012).
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI078
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPRI079	Status of SPES Facility for Acceleration of High Intensity Protons and Production of Exotic Beams	791
	M.M. Maggiore, A. Andrighetto, M. Calderolla, J. Esposito, P. Favaron, A. Lombardi, M. Manzolaro, A. Monetti, G.P. Prete, L. Sarchiapone, D. Zafiropoulos INFN/LNL, Legnaro (PD), Italy
	Since 2010 the SPES project has entered in the construction phase at Laboratori Nazionali di Legnaro (LNL) in Italy. The new high power cyclotron is being assembled and tested by BEST Theratronics company in Canada and the installation at LNL site is scheduled for fall 2014. Such machine is able to deliver two simultaneous proton beams in the energy range of 35-70 MeV and 250-500 uA of current and the facility has been designed in order to operate at the same time two different experimental areas. The three main uses of the high power beams are: production of radioactive beams by ISOL technique, production of radioisotopes for research purpose and high intensity neutron beams generation. The configuration of the facility and the further capabilities as multipurpose experimental laboratory will be presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI079
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPRI080	Measurement of Beam Phase using Phase Probe at the NIRS-930 Cyclotron	794
	S. Hojo, K. Katagiri, M. Nakao, A. Noda, K. Noda, A. Sugiura NIRS, Chiba-shi, Japan T. Honma, A.K. Komiyama, T. Okada, Y. Takahashi AEC, Chiba, Japan
	The NIRS-930 cyclotron of the National Institute of Radiological Sciences (NIRS) has been used for production of short-lived radio-pharmaceuticals for PET, research of physics, developments of particle detectors in space, and so on. The NIRS-930 has twelve trim coils for generation of the isochronous fields. Until recently, currents of the twelve trim coils had been adjusted only by monitoring the beam intensity. In order to exactly produce the isochronous fields, a phase probe has been installed in the NIRS-930. Recent results of beam tests using the phase probe will be presented in the present work.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI080
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPRI081	Beam Simulation for Improved Operation of Cyclotron NIRS-930	797
	M. Nakao, S. Hojo, K. Katagiri, A. Noda, K. Noda, A. Sugiura NIRS, Chiba-shi, Japan A. Goto Yamagata University, Yamagata, Japan T. Honma, A.K. Komiyama, T. Okada, Y. Takahashi AEC, Chiba, Japan V.L. Smirnov, S.B. Vorozhtsov JINR, Dubna, Moscow Region, Russia
	Beam simulation using SNOP* code has been performed for the cyclotron NIRS-930 at NIRS in order to study beam dynamics in a cyclotron and to improve beam intensity. Each electric or magnetic field (main coil, trim coils, harmonic coils, magnetic channel, gradient corrector, grazer lens, dee electrode, inflector) were calculated by OPERA-3d, and simulated injection, acceleration, and extraction. The simulation of proton with 30 MeV extracting energy with harmonic 1 was already performed and well simulated RF phase and extraction efficiency*. Then we tried to apply SNOP to 18 MeV protons with harmonic 2. We first formed isochronous magnetic field with main and trim coils for simulating single particle. Next we optimized electric deflector and magnetic channel in order to maximize extracted particles simulating the bunch of particles. Beam loss of the simulation was compared to the experiment. And then we are optimizing position and rotation of inflector and position of puller to improve injection. We intend to apply optimized simulation parameter to actual cyclotron operation to improve beam intensity and quality. V.L. Smirnov, S.B. Vorozhtsov, Proc. of RUPAC2012 TUPPB008 325 (2012) ** V.L. Smirnov et al., Proc. of IPAC2012 292 (2012)
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI081
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPRI082	Acceleration of High-Intensity Heavy-Ion Beams at RIKEN RI Beam Factory	800
	O. Kamigaito, T. Dantsuka, M. Fujimaki, N. Fukunishi, H. Hasebe, Y. Higurashi, E. Ikezawa, H. Imao, M. Kase, M. Kidera, M. Komiyama, H. Kuboki, K. Kumagai, T. Maie, T. Nakagawa, M. Nakamura, J. Ohnishi, H. Okuno, K. Ozeki, N. Sakamoto, K. Suda, T. Watanabe, Y. Watanabe, K. Yamada, H. Yamasawa RIKEN Nishina Center, Wako, Japan T. Nagatomo RIKEN, Saitama, Japan
	Recent efforts concerning the RIBF accelerators in RIKEN have been directed towards achieving higher beam intensities of very heavy ions such as uranium and xenon. As presented in the last IPAC conference in 2013, the intensities of these ion beams have significantly improved due to the construction of a new injector, RILAC2, which is equipped with a 28-GHz superconducting ECR ion source, the development of a helium gas stripper, and upgrading of the bending power of the fRC. In this light, this paper presents the subsequent upgrade programs carried out in the last couple of years, such as developments of a new air stripper for xenon beams and a micro-oven for metallic ions. The current performance level of the RIBF accelerator complex, as well as a future plan to further increase the beam intensities, are also presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI082
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPRI083	Improvement of the Beam Transmission in the Central Region of Warsaw U200P Cyclotron	803
	O. Steczkiewicz, P. Gmaj HIL, Warsaw, Poland V. Bekhterev, I.A. Ivanenko JINR, Dubna, Moscow Region, Russia
	To date, Warsaw U200P cyclotron exploited a mirror inflector to route heavy ions extracted from ECR ion source (10 GHz, 11 kV) to the central region of the cyclotron. However, in such configuration very low transmission was reachable after many optimizations. Additionally, the new ECR ion source (14, 5 GHz, 14-24 kV) was installed, which offers energies far exceeding capabilities of the currently operated inflector and central region. To overcome these obstacles, we have developed a spiral inflector and redesigned central region of the cyclotron. It was a very challenging task, bearing in mind limited volume of central region in our compact machine, to carve these elements suitably for decent versatility of ion beams offered by Warsaw cyclotron. This project was executed in the collaboration with FLNR in Dubna, Russia. The cyclotron equipped with the new central region works in the "constant orbit" regime. Hereby we present the results of both computational simulations and measurements of the beam transmission in upgraded central region.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI083
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

High Power Cyclotrons for Neutrino Experiments

788

D. Winklehner, J.R. Alonso, W.A. Barletta, A. Calanna, J.M. Conrad
MIT, Cambridge, Massachusetts, USA
A. Adelmann
PSI, Villigen PSI, Switzerland
L. Calabretta, D. Campo
INFN/LNS, Catania, Italy
M. Shaevitz
Columbia University, New York, USA
J.J. Yang
CIAE, Beijing, People's Republic of China

DAEδALUS* and IsoDAR** experiments needs large intense neutrino fluxes to investigate respectively the CP-Violation in the neutrino sector and the existence of sterile neutrino. DAEδALUS requires three neutrino sources driven by proton beams of ~800 MeV at powers of several megawatts placed at distances of 1.5, 8 and 20 km from the detector. Two cyclotrons working in cascade are chosen to deliver these high power beams. The first cyclotron accelerates the H²⁺ ions beam up to 60 MeV/amu. The beam is then extracted with an electrostatic deflector and reaccelerated up to 800 MeV/amu through a superconducting ring cyclotron. The acceleration of H²⁺ has two advantages: it reduces the space charge effect along the injection and acceleration inside the first cyclotron and allows the extraction of the beam from the last accelerator using a stripper foil. The injector cyclotron can be used in stand-alone mode to drive the IsoDAR experiment, which needs the accelerator placed near an underground neutrino detector. The design and the results of beam dynamic simulations will be shown. the results of preliminary injection and acceleration tests into a cyclotron test bench will be presented.
* J. Alonso et al., arXiv:1006.0260[physics.ins-det] (2010).
** A. Bungau et al., Phys. Rev. Lett. 109 141802 (2012).

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI078

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPRI079

Status of SPES Facility for Acceleration of High Intensity Protons and Production of Exotic Beams

791

M.M. Maggiore, A. Andrighetto, M. Calderolla, J. Esposito, P. Favaron, A. Lombardi, M. Manzolaro, A. Monetti, G.P. Prete, L. Sarchiapone, D. Zafiropoulos
INFN/LNL, Legnaro (PD), Italy

Since 2010 the SPES project has entered in the construction phase at Laboratori Nazionali di Legnaro (LNL) in Italy. The new high power cyclotron is being assembled and tested by BEST Theratronics company in Canada and the installation at LNL site is scheduled for fall 2014. Such machine is able to deliver two simultaneous proton beams in the energy range of 35-70 MeV and 250-500 uA of current and the facility has been designed in order to operate at the same time two different experimental areas. The three main uses of the high power beams are: production of radioactive beams by ISOL technique, production of radioisotopes for research purpose and high intensity neutron beams generation. The configuration of the facility and the further capabilities as multipurpose experimental laboratory will be presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI079

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPRI080

Measurement of Beam Phase using Phase Probe at the NIRS-930 Cyclotron

794

S. Hojo, K. Katagiri, M. Nakao, A. Noda, K. Noda, A. Sugiura
NIRS, Chiba-shi, Japan
T. Honma, A.K. Komiyama, T. Okada, Y. Takahashi
AEC, Chiba, Japan

The NIRS-930 cyclotron of the National Institute of Radiological Sciences (NIRS) has been used for production of short-lived radio-pharmaceuticals for PET, research of physics, developments of particle detectors in space, and so on. The NIRS-930 has twelve trim coils for generation of the isochronous fields. Until recently, currents of the twelve trim coils had been adjusted only by monitoring the beam intensity. In order to exactly produce the isochronous fields, a phase probe has been installed in the NIRS-930. Recent results of beam tests using the phase probe will be presented in the present work.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI080

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPRI081

Beam Simulation for Improved Operation of Cyclotron NIRS-930

797

M. Nakao, S. Hojo, K. Katagiri, A. Noda, K. Noda, A. Sugiura
NIRS, Chiba-shi, Japan
A. Goto
Yamagata University, Yamagata, Japan
T. Honma, A.K. Komiyama, T. Okada, Y. Takahashi
AEC, Chiba, Japan
V.L. Smirnov, S.B. Vorozhtsov
JINR, Dubna, Moscow Region, Russia

Beam simulation using SNOP* code has been performed for the cyclotron NIRS-930 at NIRS in order to study beam dynamics in a cyclotron and to improve beam intensity. Each electric or magnetic field (main coil, trim coils, harmonic coils, magnetic channel, gradient corrector, grazer lens, dee electrode, inflector) were calculated by OPERA-3d, and simulated injection, acceleration, and extraction. The simulation of proton with 30 MeV extracting energy with harmonic 1 was already performed and well simulated RF phase and extraction efficiency**. Then we tried to apply SNOP to 18 MeV protons with harmonic 2. We first formed isochronous magnetic field with main and trim coils for simulating single particle. Next we optimized electric deflector and magnetic channel in order to maximize extracted particles simulating the bunch of particles. Beam loss of the simulation was compared to the experiment. And then we are optimizing position and rotation of inflector and position of puller to improve injection. We intend to apply optimized simulation parameter to actual cyclotron operation to improve beam intensity and quality.
* V.L. Smirnov, S.B. Vorozhtsov, Proc. of RUPAC2012 TUPPB008 325 (2012)
** V.L. Smirnov et al., Proc. of IPAC2012 292 (2012)

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI081

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPRI082

Acceleration of High-Intensity Heavy-Ion Beams at RIKEN RI Beam Factory

800

O. Kamigaito, T. Dantsuka, M. Fujimaki, N. Fukunishi, H. Hasebe, Y. Higurashi, E. Ikezawa, H. Imao, M. Kase, M. Kidera, M. Komiyama, H. Kuboki, K. Kumagai, T. Maie, T. Nakagawa, M. Nakamura, J. Ohnishi, H. Okuno, K. Ozeki, N. Sakamoto, K. Suda, T. Watanabe, Y. Watanabe, K. Yamada, H. Yamasawa
RIKEN Nishina Center, Wako, Japan
T. Nagatomo
RIKEN, Saitama, Japan

Recent efforts concerning the RIBF accelerators in RIKEN have been directed towards achieving higher beam intensities of very heavy ions such as uranium and xenon. As presented in the last IPAC conference in 2013, the intensities of these ion beams have significantly improved due to the construction of a new injector, RILAC2, which is equipped with a 28-GHz superconducting ECR ion source, the development of a helium gas stripper, and upgrading of the bending power of the fRC. In this light, this paper presents the subsequent upgrade programs carried out in the last couple of years, such as developments of a new air stripper for xenon beams and a micro-oven for metallic ions. The current performance level of the RIBF accelerator complex, as well as a future plan to further increase the beam intensities, are also presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI082

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPRI083

Improvement of the Beam Transmission in the Central Region of Warsaw U200P Cyclotron

803

O. Steczkiewicz, P. Gmaj
HIL, Warsaw, Poland
V. Bekhterev, I.A. Ivanenko
JINR, Dubna, Moscow Region, Russia

To date, Warsaw U200P cyclotron exploited a mirror inflector to route heavy ions extracted from ECR ion source (10 GHz, 11 kV) to the central region of the cyclotron. However, in such configuration very low transmission was reachable after many optimizations. Additionally, the new ECR ion source (14, 5 GHz, 14-24 kV) was installed, which offers energies far exceeding capabilities of the currently operated inflector and central region. To overcome these obstacles, we have developed a spiral inflector and redesigned central region of the cyclotron. It was a very challenging task, bearing in mind limited volume of central region in our compact machine, to carve these elements suitably for decent versatility of ion beams offered by Warsaw cyclotron. This project was executed in the collaboration with FLNR in Dubna, Russia. The cyclotron equipped with the new central region works in the "constant orbit" regime. Hereby we present the results of both computational simulations and measurements of the beam transmission in upgraded central region.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI083

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)