Author: Vacchieri, E.
Paper Title Page
TUB04 LINAC Experience In The First Two Years of Operation @ CNAO (Centro Nazionale Adroterapia Oncologica) 129
  • S. Vitulli, E. Vacchieri
    CNAO Foundation, Milan, Italy
  • A. Reiter, B. Schlitt
    GSI, Darmstadt, Germany
  CNAO is the first medical accelerator facility for deep hadrontherapy with C6+ and H3+ in Italy. The LINAC device at CNAO include a RFQ structure accelerating up to 400 keV/u and an IH structure works up to 7 MeV/u. Such LINAC works as injector in a 78 m circumference synchrotron where the beam reaches up to 400 MeV/u. The LINAC commissioning was performed during 2009 and from beginning of 2011, it entered into routine and continuous operation. First patient was treated in September 2011. The principal LINAC parameters are daily monitored, like output energy (by means of online not destructive ToF measurements), cavities voltage, cavities RF forward power, beam current transmission. No major faults were observed in the first two years of operation. LINAC beam is stable within an error of ±0.02 MeV/u. The relation between LINAC extraction and synchrotron injection is under investigation. This paper summarizes the monitoring issues (i.e. reproducibility of settings and beam parameters as well as long term stability measures) on the CNAO LINAC during daily patient treatments and outlines the measurements performed in the initial commissioning compared within actual status.