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Letchford, A.P.

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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THO1B05 First LEBT Simulations for the Bilbao Accelerator Ion Source Test Stand 595
 
  • I. Bustinduy, D. de Cos
    ESS Bilbao, Bilbao
  • J.J. Back
    University of Warwick, Coventry
  • F.J. Bermejo
    Bilbao, Faculty of Science and Technology, Bilbao
  • J.-P. Carneiro
    Fermilab, Batavia
  • D.C. Faircloth, S.R. Lawrie, A.P. Letchford
    STFC/RAL/ISIS, Chilton, Didcot, Oxon
  • J. Feuchtwanger, J.L. Munoz
    ESS-Bilbao, Zamudio
  • S. Jolly, P. Savage
    Imperial College of Science and Technology, Department of Physics, London
  • J. Lucas
    Elytt Energy, Madrid
  • J.K. Pozimski
    STFC/RAL, Chilton, Didcot, Oxon
 
 

The Proposed Multi-specimen Low Energy Transport System (LEBT) consists of a series of solenoids with tunable magnetic fields, used to match the characteristics of the beam to those imposed by the RFQ input specification. The design of the LEBT involves selecting the number of solenoids to use and their fixed positions, so that the set of fields that provides the desired matching can be found for any given conditions (different currents, input emittances, etc). In this work we present the first simulations carried out to design the Bilbao Accelerator LEBT, which were peformed using several codes (Track, GPT, Trace2D). The best configuration is discussed and evaluated in terms of the degree of matching to the RFQ input requirements.

 

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