Author: Reiter, A.
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.  
 
THB05 The HITRAP Decelerator and Beam Instrumentation 217
 
  • F. Herfurth, Z. Andjelkovic, W.A. Barth, K. Brantjes, G. Clemente, L.A. Dahl, S. Fedotova, P. Gerhard, M. Kaiser, O.K. Kester, H.J. Kluge, C. Kozhuharov, M.T. Maier, D. Neidherr, W. Quint, A. Reiter, T. Stöhlker, G. Vorobjev, S.G. Yaramyshev
    GSI, Darmstadt, Germany
  • U. Ratzinger, A. Schempp
    IAP, Frankfurt am Main, Germany
  
  A linear decelerator is being commissioned for heavy, highly-charged ions (HCI) at GSI in Darmstadt/Germany. HCI with only one or few electrons are interesting systems for many different experiments as for instance precision tests of the theory of quantum electrodynamics (QED). In order to transform heavy HCI produced at 400 MeV/u to stored and cooled HCI at low energy the linear decelerator facility HITRAP has been setup behind the experimental storage ring (ESR). The ions are decelerated in the ESR from 400 to 4 MeV/u, cooled and extracted. The ions are then matched to an IH-structure using a double drift buncher, decelerated from 4 to 0.5 MeV/u in the IH, and then down to 6 keV/u in a 4-rod RFQ. To detect and analyze the weak and sparse ion bunches a new type of energy analyzing detector has been developed along with improvements to other “standard” beam instrumentation. One million highly charged ions have been decelerated with the IH from 400 MeV/u to about 0.5 MeV/u per cycle. The RFQ has shown in off-line tests to decelerate ions, however, the measured acceptance does not fit the ion beam from the IH. This requires a refined design, which is underway.  
slides icon Slides THB05 [2.925 MB]