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Barlow, R. J.

Paper Title Page
MOPP007 Wakefield Calculations - Comparison between Simulations and Experimental Data 562
 
  • A. Bungau, R. J. Barlow
    UMAN, Manchester
 
  In linear colliders the collimator wakefields have a significant effect on emittance growth, beam jitter and background estimates. Each simulation code models the collimator wakefields using a different approach and a discussion of the formalism for incorporating wakefields into the particle tracking code Merlin is included in this paper. Using simple collimator types we present the different predictions for bunch shape effects, and also for the wakefield kicks. These kicks are also compared with experimental results from SLAC End Station A.  
TUPP147 Accelerator Driven Systems for Energy Production and Waste Transmutation 1854
 
  • C. Bungau, S. C. Tygier
    Manchester University, Manchester
  • R. J. Barlow
    UMAN, Manchester
  • R. Cywinski
    University of Leeds, Leeds
 
  Due to their inherent safety features and waste transmutation potential, accelerator driven subcritical reactors (ADSRs) are the subject of research and development in almost all countries around the world. The neutrons needed to sustain fission are generated by the spallation process resulting from high energy protons impacting a target element installed at the centre of the core. In the present paper the possible benefits of FFAGs as accelerator drivers for ADSR systems are analysed. FFAGs afford fast acceleration as there is no need of synchronization between RF and magnets, high average current with large repetition rate and large acceptance. The present study also focuses on the Monte Carlo studies of the reactor core design. The impact of the subcriticallity, target material and proton beam energy on the ADSR performance was also examined. Entirely novel ADSR configurations involving multiple accelerator drivers and associated spallation targets within the reactor core have also been considered. Calculations were carried out using the GEANT4 simulation code.  
WEPP166 Comparison of Collimator Wakefields Formulae 2877
 
  • A. M. Toader, R. J. Barlow
    UMAN, Manchester
 
  There is an extensive literature on transverse wakefield kick factors in collimators. We present a compendium of the formulae and discuss their agreement and disagreement with each other and with experimental results.  
WEPP167 Effect of Collimator Wakefields in the Beam Delivery System of the International Linear Collider 2880
 
  • A. M. Toader, R. J. Barlow
    UMAN, Manchester
  • D. Angal-Kalinin, F. Jackson
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
 
  The collimators in the design of the International Linear Collider (ILC) Beam Delivery System (BDS) may be a significant source of wakefields and significantly degrade luminosity. New simulations are used to predict the effect of BDS collimator wakefields, and compared with previous analytical methods. BDS lattices optimised for improved collimation performance are also examined.