03 Operational Cyclotrons: Status and Developments
Paper Title Page
MOM1CIO02 Eighty Years of Cyclotrons 1
 
  • M.K. Craddock
    UBC & TRIUMF, Vancouver, British Columbia, Canada
  
  Lawrence's invention of the cyclotron in 1930 not only revolutionized nuclear physics, but proved the starting point for a whole variety of recirculating accelerators, from microtrons to FFAGs to synchrotrons, that have had an enormous impact in almost every branch of science and several areas of medicine and industry. Cyclotrons (i.e. fixed-field accelerators) themselves have proved remarkably adaptable, incorporating a variety of new ideas and technologies over the years: frequency modulation, edge focusing, AG focusing, axial and azimuthal injection, ring geometries, stripping extraction, superconducting magnets and rf… Long may they flourish!  
slides icon Slides MOM1CIO02 [7.108 MB]  
 
MOM2CIO01 Review of High Power Cyclotrons for Heavy Ion Beams 9
 
  • A. Goto
    RIKEN Nishina Center, Wako, Japan
  
  Since heavy ion cyclotrons for use in radioactive beam sciences were built in laboratories worldwide in 1980's, a lot of efforts on the upgrade of many such cyclotrons have been made in terms of beam intensity as well as beam energy. This talk describes an overview of such cyclotrons that provide heavy ion beams with the power in kW range or higher. Some technological issues related to high-power heavy ion beams are also discussed based on the experiences of those cyclotrons.  
slides icon Slides MOM2CIO01 [8.469 MB]  
 
MOM2CIO02 Intense Beam Operation at GANIL 16
 
  • F. Chautard
    GANIL, Caen, France
  
  The GANIL (Grand Accélérateur National d'Ions Lourds) produces and accelerates stable ions beams since 1982. The first radioactive beam post-accelerated with the CIME cyclotron happened in 2001. In 2013, stable beams with higher intensities and new energy range will be available from the new superconducting linear accelerator SPIRAL2. In 2015, new exotic beams will be accelerated with the existing cyclotron CIME. This paper will show how GANIL manages the SPIRAL2 machine arrival by continuing the delivery of high intensity and exotic beams. But also by pursuing the developments of the machine capabilities in a project structure in order to keep equipments running with a high reliability yield and still responding to physics demands. The progress in ion source production will be exposed. Finally, it will be presented the foreseen calendar of the exploitation for the existing machine together with SPIRAL2.  
slides icon Slides MOM2CIO02 [2.928 MB]  
 
MOM2CCO03 Progress towards High Intensity Heavy Ion Beams at the AGOR-Facility 21
 
  • S. Brandenburg, J.P.M. Beijers, M.A. Hevinga, M.A. Hofstee, H.R. Kremers, V. Mironov, J. Mulder, S. Saminathan, A. Sen
    KVI, Groningen, The Netherlands
  
  Funding: This work is supported by the European Union through EURONS, contract 506065 and the "Stichting voor Fundamenteel Onderzoek der Materie" (FOM).
The on-going upgrade program of the AGOR-facility aiming at intensities beyond 1012 pps for heavy ion beams up to Pb will be discussed. The progress in the main elements of the program (further development of the ECR-source; improvement of the transmission into and through the cyclotron and protection of equipment agains excessive beam loss) will be reported. Further improvement of the ECR ion source is facilitated by the installation of a second source. Redesign of the LEBT to compensate aberrations is in progress; simulations predict a significant increase in transmission. A new, cooled electrostatic extractor is being commissioned and the beam loss control system has been completed. The main remaining issue is vacuum degradation induced by beam loss caused by charge exchange on the residual gas. Experiments at GSI[1] have shown that scrapers and surface coatings can strongly reduce this effect. Tracking calculations of the distribution of the beam losses over the vacuum chamber to determine the optimum location of scrapers and application of a gold coating to relevant parts of the vacuum chamber are underway.
[1] C. Omet, H. Kollmus, H. Reich-Sprenger, P. Spiller; Ion catcher system for the stabilisation of the dynamic pressure in SIS18; http://jacow.org/e08/papers/mopc099.pdf 		 
slides icon Slides MOM2CCO03 [1.532 MB]  
 
MOA1CIO03
 IMP Cyclotron Status and Developments  
 
  • H.W. Zhao, H.F. Hao, M.T. Song, B. Wang, Y.P. Yang, Y.J. Yuan
    IMP, Lanzhou, People's Republic of China
  
  HIRFL (Heavy Ion Research Facility in Lanzhou) is a heavy ion accelerator complex which consists of two cyclotrons and two cooling storage rings. The two cyclotrons SFC (Sector Focus Cyclotron) and SSC (Seperated Sector Cyclotron) have been operated for more than 20 years. Great efforts have been made to improve the operation efficiency, the facility reliability and increasing beam intensity in the last couple of years. A series of upgrading programs have been accomplished which have resulted in a dramatic enhancement of the HIRFL performance. This paper will review the latest status and development of IMP cyclotrons including SFC, SSC and a compact cyclotron for 7MeV/u 12C5+ beam being built as an injector of an ion therapy synchrotron. Meanwhile, some latest developments of highly charged ECR ion sources installed at the SFC axial beam line will be also presented.  
slides icon Slides MOA1CIO03 [2.660 MB]  
 
MOA2CCO02 Current Status of the Cyclotron Facilities and Future Projects at iThemba Labs 42
 
  • J.L. Conradie, L.S. Anthony, A.H. Botha, M.A. Crombie, J.G. De Villiers, J.L.G. Delsink, W. Duckitt, D.T. Fourie, M.E. Hogan, I.H. Kohler, C. Lussi, R.H. McAlister, H.W. Mostert, S.S. Ntshangase, J.V. Pilcher, P.F. Rohwer, M. Sakildien, N. Stodart, R.W. Thomae, M.J. Van Niekerk, D. de Villiers, P.A. van Schalkwyk
    iThemba LABS, Somerset West, South Africa
  • C. Böhme
    UniDo/IBS, Dortmund, Germany
  • J. Dietrich
    FZJ, Jülich, Germany
  • Z. Kormány
    ATOMKI, Debrecen, Hungary
  
  For nearly 25 years the cyclotron facilities at iThemba LABS have been utilized for radioisotope production, nuclear physics research, and proton and neutron therapy. The aging systems require continual upgrading and replacement to limit interruptions to the scheduled beam delivery. The distributed computer control system is being migrated to a system running on the EPICS platform. The analogue low-level RF control systems will be replaced with digital systems. The Minimafios ECR ion source has been replaced with an ECR source from the former Hahn Meitner Institute and a second source, based on the design of the Grenoble test source, will be commissioned later this year. To increase the production of radio-isotopes, the 66 MeV proton beam is split to deliver beam simultaneously to two production targets. The first result with the beam splitter will be reported. A beam phase measurement system comprising 21 fixed probes has been installed in the separated sector cyclotron. Progress with these projects and the status of the facilities will be presented. Proposals for new facilities for proton therapy and for acceleration of radioactive beams will also be discussed.  
slides icon Slides MOA2CCO02 [4.496 MB]  
 
MOA2CCO03 Status of the LBNL 88-Inch Cyclotron High-Voltage Injection Upgrade Project 45
 
  • K. Yoshiki Franzen, P.W. Casey, A. Hodgkinson, M. Kireeff Covo, D. Leitner, C.M. Lyneis, L. Phair, P. Pipersky
    LBNL, Berkeley, California, USA
  
  The goal of the project includes design of a new center region that allows external beam injection at injection voltages between 20 and 30 kV for high intensity beams. This new center region will make use of a spiral inflector to eliminate the use of a gridded mirror for high intensity beams. At the same time the mechanical design of the new center region must be flexible enough to allow use of the current center region for less intense beams. The use of two or more different center regions is necessary to cover the wide range of operation parameter space utilized by the 88-Inch Cyclotron Nuclear Science and Applied research program. The project also includes HV upgrades of the external injection lines and HV insulation of the AECR and VENUS source with the goal to provide focusing for beams up to 25 kV or if feasible up to 30 kV. The current spiral inflector design is based on extensive 3D FEM simulations which results will be presented. In addition results from ongoing efforts to improve on the transport efficiency from the AECR ion source to the current mirror inflector will be discussed.  
slides icon Slides MOA2CCO03 [1.359 MB]  
 
MOPCP010 Activities at the COSY/Jülich Injector Cyclotron JULIC 63
 
  • R. Gebel, R. Brings, O. Felden, R. Maier
    FZJ, Jülich, Germany
  
  The institute for nuclear physics at the Forschungszentrum Jülich is dedicated to fundamental research in the field of hadron, particle, and nuclear physics. Main activities are the development of the HESR synchrotron, part of the GSI FAIR project, the 3.7 GeV/c Cooler Synchrotron COSY-Jülich with the injector cyclotron JULIC, as well as the design, preparation, and operation of experimental facilities at this large scale facility, and theoretical investigations accompanying the scientific research program. The operation and development of the accelerator facility COSY is based upon the availability and performance of the isochronous cyclotron JULIC as the pre-accelerator. The cyclotron is commissioned in 1968 and exceeded 240 000 hours of operation. In parallel to the operation of COSY the cyclotron beam is also used for irradiation and nuclide production. A brief overview of activities, performance, new and improved installations will be presented.  
 
MOPCP011 25 Years of Continuous Operation of the Seattle Clinical Cyclotron Facility 66
 
  • R. Risler, S.P. Banerian, J.G. Douglas, R.C. Emery, I.J. Kalet, G.E. Laramore, D.D. Reid
    University of Washington Medical Center, Seattle, USA
  
  The clinical cyclotron facility at the University of Washington Medical Center has now been in continuous operation for over 25 years. It is highly reliable, and its primary use is still for fast neutron therapy, mostly for salivary gland tumors. Neutron therapy accounts for about 85% of the facility use time. In cases where the tumor involves the base of the skull, significant improvements of patient outcome have been achieved by combining the neutron treatment with a gamma knife boost to areas where the neutron dose is limited by adjacent healthy tissue. Production of 211-At and 117m-Sn with alpha particles at 29.0 and 47.3 MeV and currents between 50 and 70 μA have become routine. These isotopes are used in medical applications presently under development. The introduction of a new control system using EPICS (Experimental Physics and Industrial Control System) is progressing systematically. All the user interfaces are up and running, and several accelerator subsystems have been migrated to the new controls. No interruption of therapy or isotope production operation is planned for the conversion to the new control system.  
 
MOPCP013 Magnetic Field Calculation and Magnet Shimming Simulation for the CYCHU-10 Cyclotron 69
 
  • Z. Chen, D.Z. Chen, K.F. Liu, B. Qin
    HUST, Wuhan, People's Republic of China
  
  The compact internal ion source cyclotron CYCHU-10 developed in Huazhong University of Science and Technology (HUST) is in magnet machining, and will be assembled soon later. Difference between the ideal computation and practical measurement of the magnetic field is an important reference for magnet shimming. So in this paper, a further study on magnet field computation using FEM is implemented. By giving diverse boundaries and grid meshes, a quarter and a half models are both calculated to make sure correctness of the ideal model. Besides, the research on magnet shimming is also carried out. A new shim tool based on an improved matrix method combining the multiple linear regression is developed to simulate the practical shimming process. With the aid of 3D finite element code and beam dynamics code, an iterative shimming process has been accomplished successfully. The results verify the feasibility and effectiveness of the shim tool.  
 
MOPCP014 Activation of a 250 MeV SC-cyclotron for Protontherapy 72
 
  • J.M. Schippers, D.C. Kiselev, R. Lüscher, O. Morath, M. Wohlmuther
    PSI, Villigen, Switzerland
  • B. Amrein, P. Frey, M. Kostezer, A. Schmidt, G. Steen
    PSI-LRF, Villigen, PSI, Switzerland
  
  Dedicated Cyclotrons of 230-250 MeV are used at protontherapy facilities since ~12 years. Beam losses at acceleration and extraction cause buildup of radioactivity in the cyclotron, having consequences for accessibility, service and decommissioning. At PSI a dedicated 250 MeV SC-cyclotron is used for proton therapy since 2007. The machine has been optimized to obtain a high extraction efficiency of over 80%. Apart from these losses, most other losses occur at a pair of phase slits at 21 cm radius. Here we report on a systematic study of the radioactivity at selected locations in the pole, the RF system and of some screws located near the median plane. The spectra of gamma rays emitted from iron plugs in the pole, copper disks in the liner and several screws have been measured with HPGe detectors. From these spectra the isotopic compositions have been derived and compared with activities calculated with the Monte Carlo transport code MCNPX. Dose rate measurements have been made as a function of time. The data and beam history of the cyclotron allow us predictions of the dose rate during service activities shortly after beam interruption as well as after a specified life time.  
 
MOPCP015 Status of the HZB# Cyclotron: Eye Tumour Therapy in Berlin 75
 
  • A. Denker, C.R. Rethfeldt, J. Röhrich
    HZB, Berlin, Germany
  • D. Cordini, J. Heufelder, R. Stark, A. Weber
    Charite, Berlin, Germany
  
  The ion beam laboratory ISL at the Hahn-Meitner-Institut Berlin supplied light to heavy ions for solid state physics and medicine. Since 1998, eye tumours are treated with protons together with the University Hospital Benjamin Franklin, Charité. In 12/2006, ISL was closed and a Charité - HMI agreement was signed to continue the tumour therapy, to this day the only facility in Germany for eye treatments. We have now experienced the first three years under the new terms; treating more than 600 patients in that time. The main challenge is to supply protons for therapy with less man-power but keeping the same high reliability as before. A new injector for protons has been installed and commissioned. The conversion process is not yet finished. In general, the operation of the machine went smoothly. Only in spring last year, we had for the first time an interruption of the therapy due to a water leak in the RF system. In spite of major structural changes we could keep a high quality standard and even increased the number of treated patients per year. In addition to the routine treatment, we established proton therapy of ocular tumours for very young children under general anaesthesia.
# The new Helmholtz-Zentrum Berlin für Materialien und Energie has been formed by the merger of the former Hahn-Meitner-Institut Berlin (HMI) and the Berlin electron synchrotron BESSY 		 
 
MOPCP016 Present Status of the RCNP Cyclotron Facility 78
 
  • K. Hatanaka, M. Fukuda, M. Kibayashi, S. Morinobu, K. Nagayama, T. Saito, H. Tamura, T. Yorita
    RCNP, Osaka, Japan
  
  The Research Center for Nuclear Physics (RCNP) cyclotron cascade system has been operated to provide high quality beams for various experiments. In order to increase the physics research opportunities, the Azimuthally Varying Field (AVF) cyclotron facility was upgraded recently. A flat-topping system and an 18-GHz superconducting Electron Cyclotron Resonance (ECR) ion source were introduced to improve the beam's quality and intensity. A new beam line was installed to diagnose the characteristics of the beam to be injected into the ring cyclotron and to bypass the ring cyclotron and directly transport low energy beams from the AVF cyclotron to experimental halls. A separator is equipped to provide RI beams produced by fusion reactions at low energy and by projectile fragmentations at high energy. Developments have been continued to increase secondary beams as white neutrons, ultra cold neutrons, muons and unstable nucleri.  
 
MOPCP017 New High Intensity Compact Negative Hydrogen Ion Cyclotrons 81
 
  • V. Sabaiduc, D. Du, W. Gyles, R.R. Johnson, K. Suthanthiran
    BCSI, Vancouver, BC, Canada
  • E.P. Conard
    PAC sprl, Dion Valmont, Belgium
  • W.Z. Gelbart
    ASD, Garden Bay, Canada
  
  Best Cyclotron Systems Inc (BCSI) has been established in Springfield, Virginia, US, for the design and production of commercial cyclotrons. The company is a subsidiary of Best Medical International renowned in the field of medical instrumentation and radiation therapy. Cyclotrons are manufactured and tested at Best Theratronics, Ottawa. BCSI is initially focusing on three different energy cyclotrons. All have four radial sectors with two dees in opposite valleys and simultaneous beam extraction on opposite lines. The BEST14p is designed for fixed 14 MeV extraction 100 μA internal upgradable to 400 μA external ion source for PET isotopes and 99mTc production. The BEST35p is designed for variable energy extraction up to 35 MeV and combined current in excess of 1.5 mA. The BEST70p is designed for variable energy extraction up to 70 MeV with a combined current of 800 μA. It may be used as injector to a post-accelerator simultaneously with isotope production. BEST70p is most challenging given its present state of the art design. Design goals are total H− vacuum or e.m. losses ≤2%; dee voltage increasing with radius from 60 kV to 81 kV; extracted beam emittance <4π mm mrad.  
 
MOPCP018 Experience of Cyclotron Operation with Beam Sharing at TSL, Uppsala 84
 
  • D. van Rooyen, K.J. Gajewski, B. Gålnander, B. Lundström, M. Pettersson, A.V. Prokofiev
    TSL, Uppsala, Sweden
  
  TSL (The Svedberg Laboratory) has a long history of producing beams of accelerated particles. Originally it was conceptualized as an accelerator for radioisotope production and nuclear chemistry by The(odor) Svedberg, and later used for nuclear physics, biological radiation effects and medical therapy with protons. A major upgrade during the 1980's with the extension of new experimental areas and a storage ring, the CELSIUS-ring, enabled the facility to get involved in new areas of nuclear physics, and neutron physics. The laboratory was restructured in 2005/2006 and the focus of activities was shifted towards, mainly, proton therapy and, in addition, radiation effects testing using protons and neutrons in a beam sharing mode. Specific attention will be given to a discussion of the development of a range of software utilities, for example switching of the beam between users by the principal user instead of being controlled via a cyclotron operator, which naturally enables a much more effective use of beam time. A range of features were developed that enables the end user to easily and effectively evaluate the beam quality as well as some further specific beam characteristics.  
 
MOPCP019 Present Status of JAEA AVF Cyclotron Facility 87
 
  • T. Yuyama, I. Ishibori, T. Ishizaka, H. Kashiwagi, S. Kurashima, N. Miyawaki, T. Nara, S. Okumura, W. Yokota, K. Yoshida, Y. Yuri
    JAEA/TARRI, Gunma-ken, Japan
  
  The JAEA AVF cyclotron provides various ion beams mainly for research in materials science and biotechnology such as estimation of radiation hardness of space-use devices, and plant breeding by ion beams. We have been developing ion sources, the cyclotron, and beam irradiation techniques to meet requirements from users. In order to stabilize the beam intensity, power supplies for magnets were improved by installing a digital-to-analog converter (DAC) unit with a Peltier device for coil current control. As a result, coil current stability of main magnet of ± 5 × 10-6 has been obtained by the renewed DAC unit which guarantees temperature control within 1°C at 30°C. Initially, it took about eight hours to form a heavy-ion microbeam, so it was impractical to change the microbeam ion species in an experiment. However, the microbeam of a 520 MeV 40Ar14+ has been successfully changed to the one of a 260 MeV 20Ne7+ within 30 minutes using a cocktail beam acceleration technique. A beam profile uniformization system using multipole magnets are being developed to enable uniform irradiation of a large sample at a constant particle fluence rate.  
 
MOPCP020 Beam Extraction of the Heavy Ions from the U-400M Cyclotron 90
 
  • O.N. Borisov
    JINR, Dubna, Moscow Region, Russia
  
  U400M is an isochronous cyclotron with pole diameter 4.0 m and 4 spiral sectors (maximal angle is equal 40°). The parameters of the cyclotron: A/Z=2-10; W=6-100 MeV/amu. A new physical channel for heavy ions beam extraction with low energies (W=5.0-9.0 MeV/amu) is constracted. Numerical simulation results of the beam extraction by stripping from the cyclotron are presented. Calculation of the transport line parameters were carried out.  
 
MOPCP021 Automated Operation and Optimization of the VARIAN 250 MeV Superconducting Compact Proton Cyclotron 93
 
  • T. Stephani, U. Behrens, H. Röcken
    VMS-PT, Bergisch Gladbach, Germany
  • C. Baumgarten
    PSI, Villigen, Switzerland
  
  The 250 MeV superconducting compact proton cyclotron of Varian Medical Systems Particle Therapy (the former ACCEL) is specially designed for the use in proton therapy systems. During medical operation typically no operator is required. Furthermore, several automated control system procedures guarantee a fast, simple, and reliable startup and beam optimization after overnight shutdown or regular service actions. We report on the automated startup procedures, automated beam centering, and automated optimization of extraction efficiency. Furthermore we present an automated beam current setting as used during medical operation by means of an electrostatic deflector located at the cyclotron center at low beam energies.  
 
MOPCP022 Present Operational Status of NIRS Cyclotrons (AVF930, HM18) 96
 
  • M. Kanazawa, S. Hojo, T. Honma, A. Sugiura, K. Tashiro
    NIRS, Chiba-shi, Japan
  • T. Kamiya, T. Okada, Y. Takahashi
    AEC, Chiba, Japan
  
  Since Japanese government launched a new program of the 'Molecular Imaging Research Program' in 2005, NIRS AVF930 cyclotron has been mainly operated to produce radio-isotopes together with a small cyclotron (HM18) for PET diagnosis. There is also machine operation of AVF930 for physical experiments and tests of radiation damage on electric devices. To carry out the cyclotron operations for these purposes, some improvements have been done in the facility. In this report, we will present recent operational status of NIRS cyclotron facility (AVF930, HM18).  
 
TUM1CIO01 Towards the 2MW Cyclotron and Latest Developments at PSI 275
 
  • M. Seidel
    PSI, Villigen, Switzerland
  
  PSI operates a cyclotron based high intensity proton accelerator routinely at an average beam power of 1.3MW. With this power the facility is at the worldwide forefront of high intensity proton accelerators. An upgrade program is under way to ensure high operational reliability and push the intensity to even higher levels. The beam current is practically limited by losses at extraction and the resulting activation of accelerator components. Further intensity upgrades are only possible if the relative losses can be lowered in proportion, thus keeping absolute losses at a constant level. The basic upgrade path involves the reduction of space charge induced extraction losses by implementing improved RF systems and resonators in both cyclotrons. The paper describes the ongoing upgrade program, achievements that were realized since the last cyclotron conference and several operational experiences and difficulties that were observed during routine operation.  
slides icon Slides TUM1CIO01 [8.697 MB]  
 
TUM1CIO02
 Latest Performance of the 500 MeV H− Cyclotron and Recent Progress Towards Three Simultaneous RIBs at TRIUMF  
 
  • I.V. Bylinskii
    TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
  
  The TRIUMF cyclotron has been operating over the last 35 years with total H¯ beam intensity increasing gradually from 100 to 300 μA cw. Simultaneous extraction of three proton beams at different energies up to 500 MeV has been provided routinely with ~90% reliability. One of the beams is sent to ISOL facility to drive the ISAC RIB program. This year the Laboratory has commenced a new development plan funded through a 5-year fiscal cycle. The plan calls for an additional source of RIB generated through photo-fission by a 50 MeV electron beam from a 500 kW cw superconducting linac. In the following phase a second high intensity proton beam will be extracted from the cyclotron and directed with the electron beam towards a new ISAC target complex geared to handle actinide targets. A versatile system of mass spectrometers and an expanded ion linac accelerator structure, to be completed during 2014-2018, would then deliver simultaneously three different RIB's to the existing experimental areas, enhancing scientific productivity of the Laboratory. At the same time the cyclotron will be upgraded to accelerate beams up to 400 μA, with more than 300 μA reaching 500 MeV.  
slides icon Slides TUM1CIO02 [3.523 MB]  
 
TUM1CCO03 Reliable Production of Multiple High Intensity Beams with the 500 MeV TRIUMF Cyclotron 280
 
  • R.A. Baartman, F.W. Bach, I.V. Bylinskii, J.F. Cessford, G. Dutto, D.T. Gray, A. Hurst, K. Jayamanna, M. Mouat, Y.-N. Rao, W.R. Rawnsley, L.W. Root, R. Ruegg, V.A. Verzilov
    TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
  
  In 2001, after 25 years of smooth cyclotron operation with up to ~200 μA H¯ acceleration, developments towards higher intensities became compelling because of the ISAC expansion. Recently average current of 300 μA, within a nominal ~90% duty cycle, was routinely achieved. Beam availability was 90-94% over the last five years. Development highlights are discussed in the paper. These include: ion source and beam transport re-optimized for this cyclotron acceptance; the 12 m long vertical injection line section was redesigned to accommodate higher space charge. In the centre region, a water cooled beam scraper was installed to absorb unwanted phases; other electrodes were realigned. Other activities were aimed at beam stability enhancement for ISAC. This included: reducing νr = 3/2 resonance effects at 420 MeV, stabilizing the intensity of the primary beam through pulser feedback regulation and improving beam quality at the target through beam optics optimization and target position stability feedback, etc. Extraction was also improved, using special stripping foils.  
slides icon Slides TUM1CCO03 [1.882 MB]  
 
TUM2CIO01 Status of RIBF Accelerators at RIKEN 286
 
  • O. Kamigaito, S. Arai, T. Dantsuka, M. Fujimaki, T. Fujinawa, H. Fujisawa, N. Fukunishi, A. Goto, H. Hasebe, Y. Higurashi, K. Ikegami, E. Ikezawa, H. Imao, T. Kageyama, M. Kase, M. Kidera, M. Komiyama, H. Kuboki, K. Kumagai, T. Maie, M. Nagase, T. Nakagawa, M. Nakamura, J. Ohnishi, H. Okuno, N. Sakamoto, K. Suda, H. Watanabe, T. Watanabe, Y. Watanabe, K. Yamada, Y. Yano, S. Yokouchi
    RIKEN Nishina Center, Wako, Japan
  
  Recent developments and upgrade program in the near future at RIKEN RI-Beam Factory (RIBF) are presented. The beam intensity and available ion species are increasing at RIBF, owing to the continuous efforts that have been paid since the first beam in 2006. So far, we accelerated deuteron, helium, nitrogen, oxygen, aluminum, calcium, krypton, and uranium beams with the superconducting ring cyclotron, SRC. The extracted beam intensities reached 1,000 pnA for helium and oxygen beams. From the operational point of view, however, the intensity of the uranium beam should be much increased. We are, therefore, constructing a new injector linac for the RIBF, consisting of a superconducting ECR ion source, RFQ, and DTL, which will be commissioned in this fiscal year. By using this injector, we also aim at independent operation of the RIBF and GARIS facility for super-heavy element synthesis.  
slides icon Slides TUM2CIO01 [4.914 MB]