ILC LET workshop

Europe/Zurich
CERN

CERN

1211 Geneva Switzerland
Daniel Schulte (CERN), Kiyoshi Kubo (KEK), Peter Tenenbaum (SLAC)
Description
This workshop will address the issues of the low emittance transport in the ILC from the damping ring to the interaction point and beyond. A number of issues will be addressed - lattice design, - alignment and tuning studies for all sub-systems, - feedback considerations, - integrated performance simulations, - tolerances and - instrumentation requirements. Conference room: 354-1-001 for all sessions but Friday afternoon In order to register send an email to Muriel Macchi (muriel.macchi@cern.ch) before January 15. The email should give your full name, institute, address and nationality; this is needed to provide the access cards. Please indicate if you want to participate to the banquet and if a cheese fondue would be acceptable for you. This workshop is supported by the EU via ELAN and EUROTeV.
    • 9:00 AM 10:30 AM
      Lattice Design

      Lattices – since we are supposed to be well along in developing these, if not actually finished, this should be a short description of the status and the location of the current lattices. Goal is to ensure that all simulation jocks have up-to-date lattices and know how to use them and where to get them if updates occur. As part of this we can discuss the issues related to the curved linac (matching the dispersion into/out of the linac, representing the curvature in the lattice file, etc.)

      • 9:00 AM
        D. Schulte: Introduction 30m
        Slides
    • 10:30 AM 10:50 AM
      coffee break 20m
    • 10:50 AM 12:30 PM
      Main Linac Studies 1

      Main linac tuning techniques – we want independently-prepared versions of our algorithms to give convergent results; we want to understand the limitations of the algorithms as they are (what are the oversimplifications, etc); we want to understand whether these techniques will work on a continually-curved lattice. Goal is to ensure that our tuning techniques actually work (by having independent versions of them which agree) and to define the work that still needs to be done on each of them. To this end we probably need a short presentation from each simulator on what their results are for some given set of inputs (the DFS is already going in this direction), and what their simplifications are, followed by discussion when it turns out they don’t agree. The techniques are BA, DFS, KM.

      • 10:50 AM
        P. Lebrun: LET studies at Fermilab 30m
        Slides
      • 11:20 AM
        F. Poirier: Dispersion Free Steering for the ILC using Merlin 20m
        Slides
      • 11:40 AM
        A. Latina: Steering the main linac with different bunch compressor settings 20m
      • 12:00 PM
        J. Smith: Benchmarking of dispersion free steering 20m
        Slides
    • 12:30 PM 1:30 PM
      lunch break 1h
    • 1:30 PM 3:30 PM
      Main Linac Studies 2
      • 1:30 PM
        P. Eliasson: An update on main linac tuning bumps 20m
        Slides
      • 1:50 PM
        D. Schulte: Some Remarks on Disperison Free Steering and Beam Jitter 20m
        Slides
      • 2:10 PM
        K. Kubo: Beam Based Alignment Simulations 10m
        Slides
      • 2:20 PM
        K. Kubo: Curved linac studies update 10m
        Slides
      • 2:30 PM
        D. Schulte: Simulations of a curved tunnel 20m
        Slides
      • 2:50 PM
        R. Jones: Longrange Wakefields and their Effect in the Main Linac 20m
    • 3:30 PM 3:50 PM
      coffee break 20m
    • 3:50 PM 6:00 PM
      Main Linac Studies 3
    • 9:00 AM 10:30 AM
      Beam Delivery System Alignment
      • 9:00 AM
        G. White: Alignment, tuning and feedback in the BDS 20m
        Slides
      • 9:20 AM
        P. Eliasson: Update on beam-beam tuning 20m
        Slides
    • 10:30 AM 10:50 AM
      coffee break 20m
    • 10:50 AM 12:30 PM
      Ring to Main Linac Alignment and Tuning
      • 10:50 AM
        P. Tenenbaum: RTML status and studies 40m
        Slides
    • 12:30 PM 1:30 PM
      lunch break 1h
    • 1:30 PM 3:30 PM
      RDR Preparation 1

      Preparation for RDR – who is doing what and by when? Presumably this is a long discussion.

      • 1:30 PM
        Answers to Main Linac Area Systems request for comments 1h 30m
        Paper
    • 3:30 PM 3:50 PM
      coffee break 20m
    • 3:50 PM 6:00 PM
      RDR Preparation 2
    • 9:00 AM 10:30 AM
      Polarization Issues

      Polarization – what simulations of spin transport have been done so far, and what more needs to be done?

      • 9:00 AM
        J. Smith: Polarisation studies with BMAD 20m
        Slides
      • 9:20 AM
        I. Bailey: Spin tracking studies by the heLiCal collaboration 20m
        Slides
      • 9:40 AM
        P. Schmid: Spin rotator work 20m
        Slides
    • 10:30 AM 10:50 AM
      coffee break 20m
    • 10:50 AM 12:30 PM
      Polarization 2
    • 12:30 PM 1:30 PM
      lunch break 1h
    • 1:30 PM 3:30 PM
      Instrumentation Requirements 1

      We need to define the performance requirements of the intrumentation. This requires that we agree on a common model of the intrumentation. An example of typical questions will be the resolution of the BPMs, their long term stability, the linearity, the efrfects of varying beam currents etc.

      This session will be a video meeting, which allows other grouos to join. Connection details will be determined soon.

      • 1:30 PM
        M. Ross: Instrumentation 1h
        Slides
    • 3:30 PM 3:50 PM
      coffee break 20m
    • 3:50 PM 6:00 PM
      Instrumentationm Requirements 2
    • 9:00 AM 10:30 AM
      Summary
      • 9:00 AM
        P. Tenenbaum: Summary 1h
        Material
    • 10:30 AM 10:50 AM
      coffee break 20m
    • 10:50 AM 12:30 PM
      Summary 2