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cyclotron

   
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MOPCH144 Low Temperature Properties of Piezoelectric Actuators Used in SRF Cavities Cold Tuning Systems radiation, TESLA, target, LHC 390
 
  • G. Martinet, S. Blivet, F. Chatelet, M. Fouaidy, N. Hammoudi, A. Olivier, H. Saugnac
    IPN, Orsay
  High accelerating gradients (10 MV/m for SNS, 33 MV/m for ILC) at which SRF cavities will be operated in pulsed machines induce frequency shift much higher than the resonator bandwidth. This so-called Lorentz detuning should be compensated dynamically by means of an active piezo-tuning system. In the frame of the CARE project activities supported by EU, IPN Orsay participates to the development of a fast cold tuning system based and piezoelectric technology for SRF cavities operating at temperature T=2K. The aim of this study is the full characterization of piezoelectric actuators at low temperature including dielectric properties (capacitance, impedance, dielectric losses), radiation hardness tests (fast neutron tolerance), mechanical measurements (maximum displacement, maximum stroke) and thermal properties (heating, heat capacity). Results obtained in the temperature range from 2K up to 300K will be presented and discussed.  
 
TUOAFI02 Design of a Treatment Control System for a Proton Therapy Facility controls, proton, radiation, target 958
 
  • J.E. Katuin, J.C. Collins, C. Hagen, W. Manwaring, P. Zolnierczuk
    IUCF, Bloomington, Indiana
  The IUCF Proton Therapy System (PTS)is designed by Indiana University and operated by the Midwest Proton Radiotherapy Institute (MPRI) to deliver proton radiation treatment to patients with solid tumors or other diseases susceptible to radiation. PTS contains three Treatment Systems, each consisting of four subsystems: Beam Delivery, Dose Delivery, Patient Positioning and Treatments Control. These systems are implemented using different operating systems, control software, and hardware platforms. Therefore, IUCF developed an XML network communication protocol so that subsystems could issue commands to and receive feedback and status from other subsystems over a local area network (LAN). This protocol was also applied to the MPRI clinical database used to access patient treatment plans. The treatment control system was designed so that a single user interface could be used to deliver proton therapy. The use of the XML and the LAN allowed the software of the treatment control system to be designed such that the various systems are treated as objects with properties and methods. This approach not only simplified the overall design of the treatment control system, it also simplified the effort required for software validation, testing, and documentation.  
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TUPCH006 A Wideband Intercepting Probe for the TRIUMF Cyclotron simulation, impedance, electron, linac 1001
 
  • V.A. Verzilov, D. Cameron, D.T. Gray, S. Kellogg, M. Minato, W.R. Rawnsley
    TRIUMF, Vancouver
  An intercepting probe for the TRIUMF cyclotron capable of measuring the phase and time structure of the circulating beam was designed, manufactured, installed into the tank and tested. A model of the probe head in the form of a 50 Ohm parallel plate transmission line was developed and simulated to operate up to 2 GHz. Thermal simulations show that the probe can withstand at least 500 nA of average current for the 500 MeV beam. In laboratory tests the probe demonstrated a bandwidth in excess of 1 GHz. The probe was mounted on a 3 m long drive and is capable of travelling over 0.5 m at an angle of 27 degree w.r.t. the cyclotron radius. The signals extracted from the probe are processed by a pair of diplexers, where low frequency and high frequency components are separated. The low frequency signal is directed to our standard electronics for processing and provides both dc current and a time of flight signal with a rise time of about 100 ns. At the high frequency output a signal-to-noise ratio of about 4 at 250 nA average current and 0.1 % duty cycle was measured in the presence of rf background from the cyclotron resonators. A bunch time structure as short as 1 ns was resolved.  
 
TUPCH070 Development of Beam Profile Monitor for Cyclotron CDA, positron, TTF, vacuum 1169
 
  • K.-H. Park, S.-M. Hong, Y.G. Jung, D.E. Kim, H.-G. Lee, W.W. Lee
    PAL, Pohang, Kyungbuk
  • D.H. An, J.-S. Chai, Y.S. Kim
    KIRAMS, Seoul
  • B.-K. Kang
    POSTECH, Pohang, Kyungbuk
  A beam profile monitor was designed and fabricated to measure the beam shape of the cyclotron MC50 beam line at KIRAMS. The sensor module was made of 13 tungsten wires and they were assembled into an array type. The sensor wires whose diameter is 1 mm were placed in parallel with the incident beam, while they were placed in the perpendicular direction to the incident beam in the conventional method. Thus this monitor has a linear actuator to scan whole beam profile, which moves the sensor module from the dormant to measurement position or vice versa. The current output of each sensor was amplified using a trans-resistance amplifier which can measure input current in the range of 1 pA. The amplifier had a resolution of ~ 20 fA, the temperature drift of ~0.5 pA/°C, and the signal-to-noise ratio greater than 80 dB. Various test results of the amplifier and sensor module assembly are given in this paper. The measured current profiles of cyclotron beam line at KIRAMS are also given.  
 
TUPCH077 Beam Phase Measurement in a 200 MeV Cyclotron pick-up, extraction, injection, controls 1187
 
  • J.L. Conradie, A.H. Botha, P.J. Celliers, J.L.G. Delsink, D.T. Fourie, P.T. Mansfield, P.F. Rohwer, M.J. Van Niekerk
    iThemba LABS, Somerset West
  • J. Dietrich, I. Mohos
    FZJ, Jülich
  New phase measuring equipment is being planned for the K 200 variable frequency, separated-sector cyclotron at iThemba LABS near Cape Town. A commercial lock-in amplifier is used to measure the beam phase over the full radial range. Measurements are made at the third and fifth harmonics of the main RF frequency to limit pick-up from the flat-topping and main dees. Computer-generated signals, with phase and amplitude control, at the same harmonics, are used to cancel the signals coupled from the dees to the phase probes. In addition the signals without beam are vectorially subtracted from those with beam to enhance the sensitivity and accuracy. Results of measurements, using these techniques, on existing phase probes in the cyclotron, will be presented.  
 
TUPCH092 Commissioning of a New Digital BPM System for the PSI Proton Accelerators proton, pick-up, controls, instrumentation 1226
 
  • B. Keil, P.-A. Duperrex, M. U. Müller
    PSI, Villigen
  A new digital beam position monitor (DBPM) system has been developed and successfully tested at the PSI proton accelerators. The DBPM hardware consists of an analogue RF front-end (RFFE), a VMEbus backplane module (VBM), and the PSI VME PMC Carrier board (VPC). The RFFE combines the 2nd RF harmonic (101.26 MHz) beam signals of pickup coils with a 101.31 MHz pilot signal. The RFFE output signals are undersampled and down-converted to base-band (no analogue mixer) by ADCs and DDCs (Direct Digital Downconverters) on the VBM. The DDCs send the digitised beam and pilot signal amplitudes to a Virtex2Pro FPGA on the VPC board. The FPGA calculates the beam positions at different averaging rates, checks interlock limits, and provides triggered storage of beam position waveforms. Furthermore, the FPGA performs automatic gain control of voltage-controlled amplifiers (VCAs) of RFFE and VBM. By continuous normalisation of beam to pilot signal, nonlinearities and temperature drifts of the electronics are eliminated. Compared to the old analogue BPM electronics, the new DBPMs offer an increased dynamic range (0.2 μA to 2 mA instead of 5 μA to 2 mA) and larger bandwidth (10 kHz instead of 10 Hz).  
 
TUPCH137 Design of the RF System for 30 MeV Cyclotron simulation, impedance, vacuum, coupling 1340
 
  • I.S. Jung, D.H. An, J.-S. Chai, H.B. Hong, S.S. Hong, M.G. Hur, H.S. Jang, J. Kang, J.H. Kim, Y.-S. Kim, M.Y. Lee, T.K. Yang
    KIRAMS, Seoul
  • K.H. Kwon
    SKKU, Seoul
  LAD (Lab. of Accelerator Development) in KIRAMS (Korea Institute of Radiological & Medical Sciences) developed 13MeV medical cyclotron, named by KIRAMS-13, for PET (Positron Emission Tomography) in 2001. Now, KIRAMS-13 is widespread in Korea through the national project, "Development of Cyclotron and FDG Synthesis module." But, there is just one cyclotron for SPECT(Single Photon Emission Computed Tomography) in Korea, which is made by IBA, Belgium. If some problems are happened, we should shut off the cyclotron until IBA engineer fixes them. So, we decide to develop a 30MeV cyclotron, named KIRAMS-30, which has high-performance compared with existing commercial cyclotrons and will install this machine to radioactive isotopes production and researches in Advanced Radiation Technology Institute. In this paper, we design RF system, such as cavity, power coupler, and so on. At design of RF components, we consider mechanical stability, RF heating and cooling, arcing and multipacting, low maintenance. We simulate KIRAMS-30 with MWS (MicroWave Studio) and present simulation results.  
 
TUPCH156 Design and Simulation of a Cusp Gun for Gyro-amplifier Application in High Frequency RF Accelerators electron, gun, cathode, simulation 1391
 
  • D.H. Rowlands, A.W. Cross, W. He, A. Phelps, E.G. Rafferty, C.W. Robertson, K. Ronald, J. Thomson, C.G. Whyte, A.R. Young
    USTRAT/SUPA, Glasgow
  Gyro-amplifiers have potential as the high frequency RF drivers for particle accelerators. They require relativistic electron beams with low velocity spread and with a high fraction of the electron energy associated with the cyclotron motion. For harmonic operation and mode control an axis-encircling beam is desirable. The passage of an electron beam through a non-adiabatic magnetic field reversal (cusp) converts part of the electron beam's axial velocity into axis-encircling transverse velocity. A cusp-based electron beam forming system, yielding a 10MW, 150kV, 70A axis-encircling beam will be presented. This cusp gun is being designed as the electron beam source for a microwave gyro-amplifier that is relevant for high frequency accelerator applications. The latest results from numerical simulations and experiments will be presented and compared.  
 
TUPLS048 Optimization Design of a Side Coupled Linac (SCL) for Protontherapy: a New Feeding Solution linac, proton, SCL, acceleration 1603
 
  • V.G. Vaccaro, A. D'Elia
    Naples University Federico II and INFN, Napoli
  • T. Clauser, A.C. Rainò
    Bari University, Science Faculty, Bari
  • C. De Martinis, D. Giove, M. Mauri
    INFN/LASA, Segrate (MI)
  • S. Lanzone
    CERN, Geneva
  • M.R. Masullo
    INFN-Napoli, Napoli
  • R.J. Rush
    e2v technologies, Chelmsford, Essex
  • V. Variale
    INFN-Bari, Bari
  It is proposed to use an SCL, starting at 30MeV, up to 230MeV. The linac consists of 25 modules (two tanks each). Twelve, 3GHz power generators, feed two modules in parallel, with the last power generator feeding the last module. The SCL is designed, assuming a mean accelerating field in the cavities of 16,5MV/m. The longitudinal and transverse beam dynamics has been studied, assuming that the input parameters (emittance, energy spread and mean current) are those of commercial 30MeV cyclotrons. The characteristics of the ejected beam were analysed: the transmittance value is largely sufficient to deliver a correct dose for therapy; the beam line activation is kept largely below allowed levels; the output energy spread is sufficiently small. The first prototype module is under construction and a second one is under design. Contacts with e2v have been established for defining an agreement, which proposes to use magnetrons as feeders for the acceleration tests. Attention was therefore paid to phase locking constraints between feeders. Theoretical studies suggest that transmittance stays constant if de-phasing is kept into values that seem attainable with magnetrons.  
 
TUPLS075 Design of the Flat-top Acceleration Cavity for the LNS Superconducting Cyclotron resonance, acceleration, extraction, simulation 1669
 
  • L.A.C. Piazza, D. Battaglia, L. Calabretta, A.C. Caruso, F. Consoli, M.M. Maggiore, D. Rifuggiato, A. Spartà
    INFN/LNS, Catania
  A 3rd harmonic Flat-top acceleration system for the K800 Superconducting Cyclotron of the Laboratori Nazionali del Sud (LNS) was designed to reduce the energy spread of the accelerated particles and to improve the beam quality and the extraction efficiency. The Flat-top effect is realized by the superposition of the 3rd harmonic to the fundamental acceleration frequency. The 3rd harmonic frequency is produced by an additional resonator, capacitively coupled to the K 800 cavities. The Flat-top cavity was designed with the 3D electromagnetic codes Ansoft HFSS and CST MicroWaveStudio.  
 
TUPLS078 Design Studies of the Compact Superconducting Cyclotron for Hadron Therapy ion, injection, extraction, simulation 1678
 
  • Y. Jongen, W. Beeckman, W.J.G.M. Kleeven, D. Vandeplassche, S.E. Zaremba
    IBA, Louvain-la-Neuve
  • V. Aleksandrov, G.A. Karamysheva, Yu. Kazarinov, I.N. Kian, S.A. Kostromin, N.A. Morozov, E. Samsonov, V. Shevtsov, G. Shirkov, E. Syresin
    JINR, Dubna, Moscow Region
  An overview of the current status of the design of the compact superconducting isochronous cyclotron C400 able to deliver ion beams with a charge to mass ratio of 0.5 is given. This cyclotron is based on the design of the current PT (proton therapy) C230 cyclotron and will be used for radiotherapy with proton, helium or carbon ions. 12C6+ and 4He2+ ions will be accelerated to 400 MeV/u energy and extracted by electrostatic deflector, H2+ ions will be accelerated to the energy 260MeV and extracted by stripping. Computer modeling results on the axial injection system, magnetic system, inflector and center design are given. Results of simulations of the ion beam injection, acceleration and extraction are presented.  
 
TUPLS087 Recent Gains in Polarized Beam Intensities for the Cooler Synchrotron COSY at Jülich COSY, ion, synchrotron, ion-source 1705
 
  • R. Gebel, O. Felden, R. Maier, P. von Rossen
    FZJ, Jülich
  Since January 1996, the cyclotron JULIC operates as the injector of H(-) or D(-) beams for the cooler synchrotron COSY at the IKP of the Forschungszentrum Juelich. Routinely about 8 microA of unpolarized or 1 microA of pola­rized H(-) ions are delivered for charge-exchange injection into COSY. A polarization in excess of 90 % was measured for protons inside the synchrotron COSY. Additionally, polarized and unpolarized D(-) ions have been delivered to experiments. A sequence of up to eight different polarization states for deuterons has been provided for experiments. By advancing the components of the polarized ion the number of polarized particles for injection into the cyclotron has been increased by a factor of three to 5,5x1012 protons, delivered in a 20 ms pulse with a repetition rate of 2 seconds. This report sums up the charac­teristics of the ion sources and the cyclotron in their present mode of opera­tion and de­scribes the achievements towards higher beam intensities as well as for providing unpolarized and polarized H(-) and D(-) beams with high reliability.  
 
TUPLS099 The New 14 GHz Ion Source for the U-400 Heavy Ion Cyclotron ion, ion-source, plasma, resonance 1732
 
  • M. Leporis, V.B. Bekhterev, S.L. Bogomolov, A. Efremov, G. Gulbekyan, Yu.K. Kostyukhov, N. Lebedev, V.N. Loginov, Yu. Yazvitsky
    JINR, Dubna, Moscow Region
  The new 14 GHz ion source DECRIS-4, to be used as a second injector of heavy multiply charged ions for the U-400 cyclotron and, in the future, also as a "charge breeder" (the "1+ -> n+" method) for the second phase of the DRIBs project, has been designed and constructed at the FLNR. The main feature of the ion source design is the creation of the extended resonance zone in a comparatively compact ECRIS. For this purpose the axial magnetic field is formed with a flat minimum by mounting only one additional solenoid coil to the classical CAPRICE magnetic structure. In this case the superposition of the axial magnetic field and the radial field of the permanent magnet hexapole, made from NdFeB, allows one to create a larger resonance volume. First results of the ion source tests show that in this resonance volume electrons are heated very efficiently which allows to produce intense beams of medium charge state ions with comparatively low level of input microwave power. The basic design features, construction issues and the first results of ion source tests are presented.  
 
TUPLS119 Design Study of the Axial Injection System of C400 Cyclotron ion, quadrupole, injection, ion-source 1786
 
  • V. Shevtsov, V. Aleksandrov, Yu. Kazarinov
    JINR, Dubna, Moscow Region
  • Y. Jongen, D. Vandeplassche
    IBA, Louvain-la-Neuve
  Computer modeling results on the axial injection system design are given. Results of simulations of the Carbon, Hydrogen and Helium ion beam injection are presented.  
 
WEOBPA03 1.8 MW Upgrade of the PSI Proton Facility target, simulation, extraction, space-charge 1879
 
  • P.A. Schmelzbach, S.R.A. Adam, A. Adelmann, H. Fitze, G. Heidenreich, J.-Y. Raguin, U. Rohrer, P.K. Sigg
    PSI, Villigen
  The PSI proton accelerator delivers currently a 590 MeV beam with an intensity of 2 mA. The upgrade programme aiming at boosting the beam power from 1.2 to 1.8 MW includes the ongoing installation of new bunchers in the transfer lines to the injector cyclotron and between injector and ring cyclotron, the replacement of the Al-cavities of the ring cyclotron by Cu-cavities operated at 1 MV, and the design and future installation of additional accelerating cavities in the injector cyclotron. Simulation studies are under way to improve our understanding of the space charge effects at the different stages of acceleration. The present status of the project will be presented.  
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WEIFI01 How to Create a Business out of Manufacturing Linacs linac, proton, ion, synchrotron 1911
 
  • R.W. Hamm, M.E. Hamm
    AccSys, Pleasanton, California
  AccSys Technology, Inc. was established in 1985 by the author and several colleagues to sell ion linacs based on the new linac technology that had just been developed at the Los Alamos National Laboratory. The company is now the leading manufacturer of turn-key ion linacs for several markets worldwide. This paper will describe the history of AccSys and how it has survived more than 20 years manufacturing these specialized products. The similarities of AccSys' history to that of a small electron linac manufacturer established in 1970 will also be described to provide a general concept of what is required to create a business out of manufacturing linacs.  
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WEPCH080 Beam Simulation of SQQ Injection System in KIRAMS-30 Cyclotron injection, ion-source, simulation, space-charge 2107
 
  • D.H. An, J.-S. Chai, H.B. Hong, S.S. Hong, M.G. Hur, W.T. Hwang, H.S. Jang, I.S. Jung, J. Kang, J.H. Kim, Y.S. Kim, M.Y. Lee, T.K. Yang
    KIRAMS, Seoul
  The injection system of KIRAMS-30 cyclotron consists of a double gap buncher, an SQQ, and a spiral inflector. Initial beam with 100 mmmrad has been generated by random Gaussian function in the transverse plane and random uniform function in the longitudinal direction. Using the 3D electric and magnetic fields of a buncher, SQQ, inflector, and return-yoke bore, the characteristics of the beam injected into the KIRAMS-30 cyclotron's central region has been obtained. This paper presents the results of its beam characteristics and parameters of each beam element.  
 
WEPCH081 Injection of The Proton Beam Into The Compact Cyclotron with Solenoid injection, simulation, emittance, space-charge 2110
 
  • L.M. Onischenko, E. Samsonov
    JINR, Dubna, Moscow Region
  The proton (H-) low (100 mkA) intensity beam injected by means of the solenoid comes to the first cyclotron orbit without the beam emittance deterioration. This is demonstrated by computer simulation.  
 
WEPCH082 Simulation of Ions Acceleration and Extraction in Cyclotron C400 resonance, ion, acceleration, extraction 2113
 
  • Y. Jongen, W.J.G.M. Kleeven
    IBA, Louvain-la-Neuve
  • G.A. Karamysheva, S.A. Kostromin, N.A. Morozov, E. Samsonov
    JINR, Dubna, Moscow Region
  The Belgian company IBA, together with scientists of the JINR in Dubna is designing a superconducting isochronous cyclotron for therapy by Carbon beams. The new cyclotron C400 has to deliver carbon ions with energy 400 MeV/amu and protons with energy close to 250 MeV. The cyclotron has a compact type superconducting magnet, with a pole radius of 187 cm. The axial focusing is provided by four sectors, with a spiral angle increasing to a maximum value close to 70° at maximum energy. With this design, an axial betatron frequency is maintained during most of the acceleration. The beam acceleration is provided by two spiral dees located in opposite valleys. The dee voltage increases from 100 kV at the center to 200 kV at extraction. The paper presents the analysis of the beam acceleration in the proposed new cyclotron. During the acceleration, several resonance lines are crossed, but the paper demonstrates that this resonance crossing is done without damaging the beam properties. Extraction of the Carbon ions is done by an electrostatic deflector, followed by magnetic correctors. Protons are extracted at lower energy by stripping 2H+1 ions.  
 
WEPCH125 New Design Tools for a Cyclotron Central Region emittance, ion, injection, simulation 2215
 
  • D. Battaglia, L. Calabretta, D. Campo, M.M. Maggiore, L.A.C. Piazza, D. Rifuggiato
    INFN/LNS, Catania
  A code that allows us to design the spiral inflector and the central region of the SCENT cyclotron was implemented. The code integrates the main equations of motion of a particle in an electromagnetic field and provides an useful interface to describe the geometry and the physical constraints of the inflector and the central region to be simulated. The mechanical drawings of the inflector and the central region is made using a standard CAD. These drawings are then imported in OPERA 3D to produce the maps of the electric and magnetic field. An application interface allows us to enter the emittance and the particles’ distributions to be transported through the inflector. An iterative process to design the central region was also developed and tested.  
 
WEPCH134 Development of Code for Simulation of Acceleration of Ions from Internal Source to End of Extraction System in Cyclotrons and Preliminary Design Study of 8MeV Cyclotron for Production of Radioisotopes extraction, acceleration, simulation, ion 2236
 
  • S.A. Kostromin
    JINR, Dubna, Moscow Region
  From the users' point of view modern cyclotrons must be compact, energy-saving, low-radiation and very reliable facilities. To provide all these characteristics, a very detailed design study of all systems of an accelerator under development is required. Thus, particle tracking from the "beginning" to the "end" in modern cyclotrons with small gaps in the main acceleration region and with efficient extraction systems becomes a very important task for designers. Codes for beam dynamics simulation at the center, main acceleration region and through the extraction system of the cyclotron have been developed. It is possible to monitor all main beam parameters at the different stages of acceleration, radial, axial and phase motion of the beam and the energy increase. During tracking particles through the extraction system it is possible to calculate rms envelopes of radial and vertical motion of the beam and beam losses at the aperture of the extraction system elements. A preliminary design of a compact 8-MeV proton cyclotron was studied using created codes. The accelerator is supposed to have a four sector compact magnet system with the pole 64 cm in diameter.  
 
WEPCH173 The Performance of Double-grid O-18 Water Target for FDG Production target, proton, radiation, simulation 2337
 
  • H.B. Hong, J.-S. Chai, M.G. Hur, H.S. Jang, J. Kang
    KIRAMS, Seoul
  • H.H. Cho, K.M. Kim
    Yonsei University, Seoul
  The main stream of our study about the target is increasing the lifetime of the target windows. Mainly we conduct our study to increase the cooling performance and secondly about the structural design of the targets and target window foils. We already had developed and had published the results of our research about O-18 double-grid water target, which had installed on our 13 MeV cyclotron KIRAMS-13. The beam size of the accelerated proton was 9 mm*18 mm (0.35 in * 0.7 in). The double-grid target shows relatively low pressure during irradiation and good yield of F-18. The average yield of F-18 after irradiation was more than 1 Ci at 12.5 MeV , around 26 μA. Additionally, we are conducting new research for new techniques to increase the performance of low energy double-grid target and a new state-of-the-art pleated double foil target.  
 
WEPCH179 The Indiana University Proton Therapy System proton, rfq, controls, radiation 2349
 
  • D. Friesel, V. Anferov, J.C. Collins, J.E. Katuin, S. Klein, D. Nichiporov, M. Wedeikind
    IUCF, Bloomington, Indiana
  The Midwest Proton Radiotherapy Institute (MPRI)was designed by the Indiana University Cyclotron Facility (IUCF)to deliver proton radiation treatment to patients with solid tumors or other diseases susceptible to radiation. The IUCF Proton Therapy System (PTS)has five unigue subsystems to perform the radiation treatment; Beam Delivery, Dose Delivery, Patient Positioning and Treatment Control systems. The MPRI Clinic began operations in 2003 with a single Fixed Horizontal Beam Line (FHBL)treatment room and is being expanded to include two additional treatment rooms utilizing modified IBA* 360 degree rotating gantry systems. The Gantry nozzles use a beam wobbling and energy stacking system to produce the lateral and longitudinal beam distributions required for patient treatment. A treatment control system** provides a single user interface to deliver and monitor Proton Therapy treatment. This paper will present an brief overview of the Proton Therapy Facility, the properties and examples of the beam performance of the unique Nozzle design, and a summary of the facility beam operations.

* Ion Beam Applications, Inc, Belgium ** Design of a Treatment Control System for a Proton Therapy Facility, Joe Katuin, these proceedings

 
 
WEPLS078 Design Study of the 30 MeV Cyclotron Magnet extraction, acceleration, proton, injection 2559
 
  • J. Kang, D.H. An, J.-S. Chai, H.S. Chang, H.B. Hong, M.G. Hur, I.S. Jung, Y.-S. Kim, T.K. Yang
    KIRAMS, Seoul
  Korea Institute of RAdiological & Medical Sciences (KIRAMS) has been developing a 30 MeV cyclotron that is planned to be installed at Advanced Radiation Technology Institute, Jeongeup in late 2006. The AVF (Azimuthally Varying Field) magnet of the cyclotron was designed to produce 15-30 MeV proton beam with movable stripper foil. Four directions of extractions are available with two switching magnets. The overall shape of the magnet is cylindrical. The magnet has three kinds of holes for beam injection, vacuum pumps and RF system. The valley and hill gap ratio is about 20 for higher axial focusing. The designed magnet model and its magnetic properties of the KIRAMS-30 are presented.  
 
WEPLS092 Computer Modeling of Magnetic System for C400 Superconducting Cyclotron extraction, simulation, injection, focusing 2589
 
  • Y. Jongen, D. Vandeplassche, S.E. Zaremba
    IBA, Louvain-la-Neuve
  • G.A. Karamysheva, N.A. Morozov, E. Samsonov
    JINR, Dubna, Moscow Region
  The superconducting cyclotron (C400) is designed at IBA (Belgium) able to accelerate carbon ions at 400 MeV/nucleon. By computer simulation with 3D TOSCA code, the cyclotron magnetic system principal parameters were estimated (pole radius 187 cm, outer diameter 606 cm, valley depth 60 cm, height 276 cm). The required isochronous magnetic field was shaped with an accuracy of ± 2 mT. Four-fold symmetry and spiralized sectors with elliptical gap (minimal 12 mm at extraction) provide the stable beam acceleration till 15 mm from the pole edge.  
 
THPCH107 Upgrade of TRIUMF's 2C STF Control System controls, target, site, isotope-production 3050
 
  • M. Mouat, I.A. Aguilar, E. Klassen, K.S. Lee, J.J. Pon, T.M. Tateyama, P.J. Yogendran
    TRIUMF, Vancouver
  One of TRIUMF's isotope production facilities, the 2C Solid Target Facility (STF), is being upgraded. This installation is located on a primary beamline of TRIUMF's 500 MeV Cyclotron. As a part of this upgrade project, the STF Control System is also being revised. Changes to the STF are meant to enhance reliability and maintainability. The existing STF controls have run very reliably and have provided the required functionality but were implemented in part using different technology to that used for the majority of the cyclotron's Central Control System. The new hardware and software controls should provide a simpler, more easily maintained configuration. Additional goals are to modify the user interface to more closely resemble the interface used for running the 500 MeV Cyclotron, to enhance the event annunciation, and to increase the number of parameters logged.