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Boorman, G.E.

Paper Title Page
WEO1C02 Status Report of the RAL Photo-Detachment Beam Profile Monitor 492
  • C. Gabor
    STFC/RAL/ASTeC, Chilton, Didcot, Oxon
  • G.E. Boorman, A. Bosco
    Royal Holloway, University of London, Surrey
  • A.P. Letchford
    STFC/RAL, Chilton, Didcot, Oxon
  • J.K. Pozimski, P. Savage
    Imperial College of Science and Technology, Department of Physics, London

The Rutherford Appleton Laboratory (RAL) is developing a Linac front end suitable for High Power Proton Applications (HPPA). The main components are an H- ion source with up to 60mA current at 65keV, a transport section to match the beam to an RFQ with 3MeV output energy and a MEBT comprising a chopper system with severalbuncher cavities. Photo detachment can be used as a non-destructive diagnostics method. The paper reports on progress with a beam profile monitor that is placed in a pumping vessel right after the ion source at the intersection to the Low Energy Beam Transport (LEBT). This consists of mirrors inside the vacuum to scan the laser beam through the beam, the actual detector to measure photo detached electrons, laser and optics outside the vacuum and electronics to amplify and read out the signal. The paper summarises the experimental set-up and status, discusses problems and presents recent measurements.


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