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beam profile

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PM16 Wire Scanner Beam Profile Measurement For ESRF wire scanner, transfer line, emittance, ESRF 131
 
  • A.B. El-Sisi
    NRC, Atomic Energy Authority, NRC, Plasma and Nuclear Fusion Dept., Cairo, Egypt
  Method of beam transverse profile measurement in accelerator by wire scanner is wide spread in accelerator field. The wire scanner is used in beam transfer lines of European Synchrotron Radiation Facility (ESRF) to provide data for beam profiles, which is being used in emittance measurements. The beam energy in the first transport line is 200 MeV and the peak current is 25 mA. The purpose of the scanner is to provide horizontal and vertical beam profiles. This work will discuss the operation of the wire scanner, and the first results of the scanner in ESRF. By changing the value of focus quad at (de focus quad = 18 A) we get the emittance value for the vertical plane. The value is 1.5·10-6 mrad. When we used this value to simulate our result we find that the simulation gives good fitting with real values of vertical plane. Also by changing the value of the focus quad at (focus quad = 10.46 A) we get the emittance value for the horizontal plane. The value is 2·10-7 mrad. And we find that the simulation gives good fitting with real values.  
 
PM25 Diagnostics of the PROSCAN beam lines proton beam, 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.