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Zhang, Y.

Paper Title Page
MOPD06 Achieving High Luminosity in an Electron-Ion Collider 49
  • Y. Zhang, Y.S. Derbenev, G.A. Krafft, B.C. Yunn
    JLAB, Newport News, Virginia

The conceptual design of a polarized ring-ring electron-ion collider based on the CEBAF recirculated electron SRF linac relies on high repetition rate and high averaged current ion beams with very short bunch length and very small transverse emittance for reaching ultra high collider luminosity, up to middle of 1034 s-1cm-2. Nevertheless, making of such ion beams is a significant challenge, depending on various accelerator R&D including ion source, SRF linac, staged electron cooling and crab crossing at interaction points. In this paper, we will present some new ideas and concepts towards to realization of high collider luminosities, as well as preliminary conceptual design of various components of an ion complex that is capable to create such ion beams.

MOPD29 Transverse Matching Progress of the SNS Superconducting Linac 126
  • Y. Zhang, S.M. Cousineau, Y. Liu
    ORNL, Oak Ridge, Tennessee

Experience using laser-wire beam profile measurement to perform transverse beam matching in the SNS superconducting linac is discussed. As the SNS beam power is ramped up to 1 MW, transverse matching should become more critical to control beam loss and residual activation. In our experiments, however, beam loss in the SC linac is not very sensitive to the matching condition. In addition, we have encountered some difficulties in performing a satisfactory transverse beam matching with the envelope model currently available in our XAL software framework. Offline data analysis from multi-particle tracking simulation shows that the accuracy of the current matching algorithm may not be sufficient to the SC linac.