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proton beam

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PM25 Diagnostics of the PROSCAN beam lines beam profile, ionisation chamber, halo, PROSCAN 152
 
  • R. Dölling
    PSI, Paul Scherrer Institut, Villigen, Switzerland
  PROSCAN, an extended medical facility using proton beams for the treatment of deep seated tumours and eye melanoma, is now in preparation at PSI. A 250 MeV proton beam of 0.1 to 500 nA will be extracted from the COMET cyclotron. After degradation to 70 to 230 MeV it can be delivered (at a maximum current of 1 to 5 nA) into one of four areas: Two gantries, an eye treatment room and an irradiation area for various experiments. Fast changes of beam energy are foreseen for the spot-scanning treatment of deep-seated tumours in the gantries. Several diagnostics will be used to control the beam parameters in different modes of operation. An overview is given on the devices foreseen for the measurement of beam profile, position, current and losses in the beam lines.