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Etxebarria, V.

Paper Title Page
MOPEC075 Status of the RAL Front End Test Stand 642
 
  • A.P. Letchford, M.A. Clarke-Gayther, D.C. Faircloth, S.R. Lawrie, M. Perkins, P. Wise
    STFC/RAL/ISIS, Chilton, Didcot, Oxon
  • S.M.H. Alsari, S. Jolly, D.A. Lee, P. Savage
    Imperial College of Science and Technology, Department of Physics, London
  • I. Ariz, R. Enparantza, P. Romano, A. Sedano
    Fundación TEKNIKER, Eibar (Gipuzkoa)
  • J.J. Back
    University of Warwick, Coventry
  • F.J. Bermejo
    Bilbao, Faculty of Science and Technology, Bilbao
  • M. Eguiraun
    ESS-Bilbao, Zamudio
  • V. Etxebarria
    University of the Basque Country, Faculty of Science and Technology, Bilbao
  • C. Gabor, D.C. Plostinar
    STFC/RAL/ASTeC, Chilton, Didcot, Oxon
  • N. Garmendia, H. Hassanzadegan
    ESS Bilbao, Bilbao
  • A. Kurup
    Fermilab, Batavia
  • J.K. Pozimski
    STFC/RAL, Chilton, Didcot, Oxon
 
 

The Front End Test Stand (FETS) under construction at the Rutherford Appleton Laboratory is the UK's contribution to research into the next generation of High Power Proton Accelerators (HPPAs). HPPAs are an essential part of any future Spallation Neutron Source, Neutrino Factory, Muon Collider, Accelerator Driven Sub-critical System, Waste Transmuter etc. FETS will demonstrate a high quality, high intensity, chopped H-minus beam and is a collaboration between RAL, Imperial College and the Universtity of Warwick in the UK and the Universidad del Pais Vasco in Spain. This paper describes the current status and future plans of FETS.

 
TUPEA055 Design and Implementation of a Pulsed Digital LLRF System for the RAL Front End Test Stand 1458
 
  • H. Hassanzadegan, N. Garmendia
    ESS Bilbao, Bilbao
  • F.J. Bermejo
    Bilbao, Faculty of Science and Technology, Bilbao
  • M. Eguiraun
    ESS-Bilbao, Zamudio
  • V. Etxebarria
    University of the Basque Country, Faculty of Science and Technology, Bilbao
  • D.J.S. Findlay, A.P. Letchford
    STFC/RAL/ISIS, Chilton, Didcot, Oxon
 
 

Design, implementation and some practical results of the pulsed digital LLRF system (amplitude, phase and tuning loops) of the RFQ for the ISIS front end test stand are presented. The design is based on a fast analog front-end for RF-baseband conversion and a model-based Virtex-4 FPGA unit for signal processing and PI regulation. Complexity of the LLRF timing is significantly reduced and the LLRF requirements are fulfilled by utilizing the RF-baseband conversion method compared to the conventional RF-IF approach. Validity of the control loops is ensured practically by hardware-in-the-loop co-simulation of the system in MATLAB-Simulink using an aluminium mock-up cavity. It was shown through extensive tests that the LLRF system meets all the requirements including amplitude and phase stability, dynamic range, noise level and additionally provides a full amplitude and phase control range and a phase margin larger than 90 degrees for loop stability.

 
THPEC068 First Simulation Tests for the Bilbao Accelerator Ion Source Test Stand 4211
 
  • I. Bustinduy, D. Fernandez-Cañoto, D. de Cos
    ESS Bilbao, Bilbao
  • J. Alonso, M. Eguiraun, R. Enparantza, M. Larrañaga
    Fundación TEKNIKER, Eibar (Gipuzkoa)
  • F.J. Bermejo
    Bilbao, Faculty of Science and Technology, Bilbao
  • V. Etxebarria, J. Jugo, J. Portilla
    University of the Basque Country, Faculty of Science and Technology, Bilbao
  • D.C. Faircloth, S.R. Lawrie, A.P. Letchford
    STFC/RAL/ISIS, Chilton, Didcot, Oxon
  • J. Feuchtwanger
    ESS-Bilbao, Zamudio
  • S. Jolly
    Imperial College of Science and Technology, Department of Physics, London
  • J. Lucas
    Elytt Energy, Madrid
 
 

The rationale behind the Bilbao Accelerator Ion Source Test Stand (ITUR) project is to perform a comparison between different kinds of hydrogen ion sources using the same beam diagnostics setup. In particular, a direct comparison will be made in terms of the emittance characteristics of Penning-type sources such as those currently being used in ISIS (UK) and those of microwave type such as CEA-Saclay and INFN. The aim here pursued is to build an Ion Source Test Stand where virtually any type of source can be tested and, thus, compared to the results of other sources under the same gauge. It would then be possible to establish a common ground for effectively comparing different ion sources. The work here presented reports on the first simulations for the H-/H+ extraction system, as well the devices that conform the diagnostic vessel: Faraday Cup, Pepperpot and Retarding Potential Analyzer (RPA), among others.

 
THPEC069 Beam Dynamics Studies on the Radio-Frequency Quadrupole for the Bilbao Accelerator 4214
 
  • I. Bustinduy, N. Garmendia, H. Hassanzadegan, D. de Cos
    ESS Bilbao, Bilbao
  • F.J. Bermejo
    Bilbao, Faculty of Science and Technology, Bilbao
  • V. Etxebarria, J. Portilla
    University of the Basque Country, Faculty of Science and Technology, Bilbao
  • J. Feuchtwanger
    ESS-Bilbao, Zamudio
  • S. Jolly, J.K. Pozimski, P. Savage
    Imperial College of Science and Technology, Department of Physics, London
  • A.P. Letchford
    STFC/RAL/ISIS, Chilton, Didcot, Oxon
 
 

The main objective of the Bilbao Front End Test Stand (ETORFETS) is to set up a facility to demonstrate experimentally the design ideas for the future ESS LINAC that are being proposed in discussion forums by the technical scientific community. ETORFETS is focused on the first stage of the linear accelerator, namely, that of the Radio-Frequency Quadrupole (RFQ) and its pre and post beam transport systems. The RFQ bunches, focuses transverse and longitudinally, and accelerates charged particles in the low-energy range (up to ~ 3 MeV), thus becoming one of the main components of the accelerating structure. The first RFQ simulations, performed in Superfish and GPT software packages, will be presented in this work.