Author: Kurfuerst, C.     [Kurfürst, C.]
Paper Title Page
MOPOY001 MedAustron Synchrotron RF Commissioning for Medical Proton Beams 844
 
  • C. Schmitzer, F. Farinon, A. Garonna, M. Kronberger, T.K.D. Kulenkampff, C. Kurfürst, S. Myalski, S. Nowak, F. Osmić, L.C. Penescu, M.T.F. Pivi, P. Urschütz, A. Wastl
    EBG MedAustron, Wr. Neustadt, Austria
 
  MedAustron is a medical accelerator facility for hadron therapy cancer treatment using protons and carbon ions. The Synchrotron is driven by a 0.47-3.26 MHz Finemet® loaded wideband cavity powered by 12x 1kW solid state amplifiers connected to a digital Low Level RF system. It was developed in collaboration with CERN and put to operation at MedAustron in early 2014. The main Synchrotron RF (sRF )commissioning steps for proton beams involved the setup of the adiabatic capture process, the setup of the frequency and voltage ramps and feedback loops for fast acceleration and the RF jump for extraction. The adiabatic capture process was optimized in terms of energy and voltage mismatch by analyzing longitudinal empty bucket scans after beam injection into the synchrotron. The acceleration ramp optimization was based on calculations using a software tool developed in-house and adapted experimentally to minimize losses at injection and during acceleration. This paper provides an overview of the acceleration system and describes the commissioning process of the sRF system and the related beam commissioning efforts at MedAustron.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY001  
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TUPMR035 HEBT Commissioning for Horizontal Beamline Proton Treatments at MedaAustron 1324
 
  • C. Kurfürst, F. Farinon, A. Garonna, M. Kronberger, T.K.D. Kulenkampff, S. Myalski, S. Nowak, F. Osmić, L.C. Penescu, M.T.F. Pivi, C. Schmitzer, P. Urschütz, A. Wastl
    EBG MedAustron, Wr. Neustadt, Austria
 
  MedAustron has completed its proton commissioning activities for clinical treatment in the horizontal Irradiation Room 3 (IR3). Work involved the preparation of 255 energies in clinical range (60 - 250 MeV) for one spill length, one spot size and 4 intensity levels. After resonant slow extraction, the beam crosses four different functional areas in the High Energy Beam Transfer Line (HEBT): the dispersion suppressor (DS), the phase shifter stepper (PSS), two straight extension modules and a deflection module to IR3. Quadrupole-variation methods were applied to center the beam in the beamline. The DS section was commissioned to provide high intensity beams with closed dispersion. The PSS section was commissioned to provide symmetric and minimal spot sizes at the iso-center in the room (after scattering in the nozzle and air). The definition of the 255 clinical energies was given by the Medical Physics team after measuring the beam ranges at the iso-center.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR035  
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TUPMR036 Extraction Commissioning for MedAustron Proton Operation 1327
 
  • T.K.D. Kulenkampff, A. Garonna, M. Kronberger, C. Kurfürst, S. Nowak, F. Osmić, L.C. Penescu, M.T.F. Pivi, C. Schmitzer, P. Urschütz, A. Wastl
    EBG MedAustron, Wr. Neustadt, Austria
 
  MedAustron is a synchrotron based ion beam therapy center for proton (62-250 MeV) and carbon ion (120-400 MeV/n) treatments. The MedAustron synchrotron uses a betatron core driven slow extraction scheme based on a third order resonance. The commissioning of the extraction from the synchrotron involved the setup of the correct orbit and optics at flattop. In order to maximize the momentum spread before extraction and optimize spill structure the RF system enforces a so called RF-phase jump to the unstable phase. Different scenarios were simulated using MADX-PTC [1] in combination with Python to overcome the static nature of PTC. Simulations have shown that the initial phase of the beam and a finite time to jump to the unstable fix point have a strong impact on the performance. Using a high frequency intensity monitor in the extraction channel (QIM), the spill structure was analysed and used for optimization. Simulation and measurements of the procedure are presented.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR036  
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TUPMR037 Betatron Core Driven Slow Extraction at CNAO and MedAustron 1330
 
  • M. G. Pullia, E. Bressi, L. Falbo, C. Priano, S. Rossi, C. Viviani
    CNAO Foundation, Milan, Italy
  • A. Garonna, M. Kronberger, T.K.D. Kulenkampff, C. Kurfürst, F. Osmić, L.C. Penescu, M.T.F. Pivi, C. Schmitzer, P. Urschütz, A. Wastl
    EBG MedAustron, Wr. Neustadt, Austria
 
  The Italian Centre for Hadrontherapy (CNAO) and the MedAustron Hadrontherapy Center in Austria are synchrotron-based medical therapy centers. The CNAO machine has five years of experience in patient treatments, whereas MedAustron will soon start patient treatments with protons. Their accelerator systems have common characteristics, in particular in regards to the extraction system: at acceleration flattop, particles are slowly driven through the third integer resonance longitudinally by a betatron core. This setup enables smooth extracted beam intensities. The rationale behind the use of a betatron core, its impact on the extracted beam quality and the performance from operation and commissioning of the two centers will be here presented.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR037  
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TUPOY001 Beam Quality Assurance for Proton Clinical Beams at MedAustron 1899
 
  • L.C. Penescu, F. Farinon, A. Garonna, M. Kronberger, T.K.D. Kulenkampff, C. Kurfürst, S. Myalski, S. Nowak, F. Osmić, M.T.F. Pivi, C. Schmitzer, P. Urschütz, A. Wastl
    EBG MedAustron, Wr. Neustadt, Austria
 
  The commissioning process of the MedAustron accelerator has delivered the configurations providing the requested beam parameters in the irradiation room, and at the same time it identified the critical points where a performance drift can appear. The strategy for beam quality assurance has therefore two components: testing the specific parameters of the beam delivered to the irradiation room, and testing for any drifts that might appear at the critical points. We present here the monitoring strategy, the observed limitations, the tools employed and the long-term statistics of the beam quality assurance for proton clinical beams.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOY001  
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THOAB01 Status of Proton Beam Commissioning of the MedAustron Particle Therapy Accelerator 3176
 
  • A. Garonna, F. Farinon, M. Kronberger, T.K.D. Kulenkampff, C. Kurfürst, S. Myalski, S. Nowak, F. Osmić, L.C. Penescu, M.T.F. Pivi, C. Schmitzer, P. Urschütz, A. Wastl
    EBG MedAustron, Wr. Neustadt, Austria
 
  MedAustron is a synchrotron-based ion beam therapy centre, designed to deliver clinical beams of protons (60-250 MeV) and carbon ions (120-400 MeV/u) to three clinical irradiation rooms (IR) and one research room, which can also host 800 MeV protons. The commission-ing activities for the first treatments with proton beams in IR3 have been completed and commissioning of IR1-2 is ongoing. The present paper describes the activities which took place during the last year, which involved all accel-erator components from the ion source to the IR.  
slides icon Slides THOAB01 [4.483 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THOAB01  
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