Author: Machida, S.
Paper Title Page
MO2PB01 What We Learned from EMMA 14
  • S. Machida
    STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom
  Since the demonstration of acceleration in 2011, the study of EMMA aims for more detailed and quantitative understanding of a linear non-scaling FFAG. The talk will summarise the beam study for the last couple of years which includes effects of resonance crossing, a novel idea of COD correction, etc.  
slides icon Slides MO2PB01 [8.447 MB]  
MOPPT018 End-to-End 6-D Tracking Using EMMA On-Line Model 70
  • F. Méot
    BNL, Upton, Long Island, New York, USA
  • D.J. Kelliher, S. Machida
    STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom
  • B.J.A. Shepherd
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  Numerical simulation of 6-dimensional, end-to-end beam transport in the prototype EMMA linear FFAG is presented and discussed. The simulation uses the 3-D OPERA field maps of the 42 cells, including the specific injection and extraction cells. It starts from upstream of the injection septum, and ends downstream of the extraction septum after 10-turn "serpentine" acceleration from 10 to 20 MeV. It includes the time function of the septa and injection and extraction pairs of kickers, and possible stray fields.  
WEPPT031 High Intensity Beam Studies Using the KURRI FFAGs 387
  • S. Machida, C. Gabor, D.J. Kelliher, C.R. Prior, C.T. Rogers, S.L. Sheehy
    STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom
  • Y. Ishi, J.-B. Lagrange, Y. Mori, T. Uesugi
    Kyoto University, Research Reactor Institute, Osaka, Japan
  Increasing the repetition rate of FFAG accelerators is one way of obtaining high average beam current. However, in order to achieve beam powers of up to 10 MW for applications like ADSR, the number of particles per bunch has to be approximately the same order in an FFAG as in a high power synchrotron. Collective effects such as space charge then become crucial issues. To understand high current beam behaviour in FFAGs, an international collaboration has been established to carry out an experimental programme using the FFAGs at Kyoto University's Research Reactor Institute, KURRI. The goal is to demonstrate acceleration of high bunch charge and identify the fundamental limitations. In this paper, we will show simulation results toward the first beam experiment which is planned for later in 2013.