| Paper | Title | Other Keywords | Page |
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| MOPCP015 | Status of the HZB# Cyclotron: Eye Tumour Therapy in Berlin | proton, cyclotron, ion, controls | 75 |
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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 |
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| MOPCP025 | Construction of New Injector LINAC at RIBF | linac, impedance, ion, vacuum | 102 |
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| 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. | |||
| MOPCP094 | Consistency in Measurement of Beam Phase and Beam Intensity Using Lock-in Amplifier and Oscilloscope Systems | cyclotron, monitoring, acceleration, beam-transport | 245 |
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| The RIKEN RI beam factory (RIBF) consists of four ring cyclotrons (RRC, fRC, IRC, and SRC) and two injectors (RILAC and AVF) which are all connected in cascade. RILAC, AVF, and RRC began operation in the 1980s, and fRC, IRC, and SRC were installed in 2006. Phase probes (PPs) are installed in all cyclotrons and beam transport lines of RIBF, and the beam-bunch signals that are detected nondestructively by these PPs are used for tuning of isochronous magnetic field of cyclotrons and for monitoring the beam phase and beam intensity. We mainly use a newly developed system that incorporates a lock-in amplifier (LIA; SR844, SRS) for those tuning and monitoring; however, in AVF and RRC, a conventional measurement method using an oscilloscope system (OSC; DSO6052A, Agilent) is used. In this study, we investigated the consistency in the measurements carried out using LIA and OSC systems by Fourier analyzing the observed data. Additionally, we investigated the resolution and measurement uncertainty of LIA and OSC. | |||
| TUM2CIO01 | Status of RIBF Accelerators at RIKEN | cyclotron, ion, ion-source, acceleration | 286 |
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| 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. | |||
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Slides TUM2CIO01 [4.914 MB] | ||