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Recent Activities

Recent Activities. H. Loos 09/13/2011. Activities. FACET Bunch length monitor commissioning LCLS HLA for FACET THz source simulation Software development MAD deck parser for Matlab Accelerator agnostic HLAs Spatial 2D transition radiation simulation LCLS LEM server

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Recent Activities

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  1. Recent Activities H. Loos 09/13/2011

  2. Activities • FACET • Bunch length monitor commissioning • LCLS HLA for FACET • THz source simulation • Software development • MAD deck parser for Matlab • Accelerator agnostic HLAs • Spatial 2D transition radiation simulation • LCLS • LEM server • Transport matrix measurement • Ultra-fast emittance measurement • Undulator BBA studies

  3. FACET BLM & OTR Screens • Ample signal from pyro with properly setup beam • Absolute bunch length calibration needed • Cameras suffer from higher radiation environment at FACET Display by J. Yocky

  4. LCLS HLSs for FACET • Wire scan, emittance, profile monitor, correlation plot, Matlab model

  5. FACET THz Experiment • Simulations of spectrum and beam size Measured spectrum Simulated spectrum Water absorption Vertical Size 2.4 µm Horizontal Size 2.9 µm λ = 100 µm Data from A. Fisher & Z. Wu

  6. 2D Transition Radiation Simulation • Laguerre-Gauss Modes for radiation propagation • Original only 1 angular mode for both polarizations each • Inaccurate results for eccentric electron beams • Use multiple angular modes for true 2D calculation 1mm x 250 um e-beam TR 2D Calculation TR 1D Calculation

  7. Transport Matrix Measurement • Measure jitter orbits or phase space grid oscillations • Non-invasive jitter measurement • Generate grid in normalized phase space with two correctors

  8. LTU Matching Prediction • Predict lattice functions in LTU from LI28 emittance measurement and R-matrix measurements

  9. Fast Emittance Measurement • Orbit bump at wires in LI28 • Emittance in 1 plane < 10s • Agrees with scanning wire

  10. Undulator BBA Studies • Try BBA at single energy • Girders don’t move much, only BPM offsets • Fit launch & linear offset slope • Compare with BBA offsets with K. Bertsche, H.-D. Nuhn, F. Peters

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