Recent Activities H Loos 09132011 13 Sep 2011
- Slides: 10
Recent Activities H. Loos 09/13/2011 13 Sep 2011 APE Meeting 1 1 Henrik Loos loos@slac. stanford. edu
Activities FACET Bunch length monitor commissioning LCLS HLA for FACET THz source simulation Software development MAD deck parser for Matlab Accelerator agnostic HLAs Spatial 2 D transition radiation simulation LCLS LEM server Transport matrix measurement Ultra-fast emittance measurement Undulator BBA studies 13 Sep 2011 APE Meeting 2 2 Henrik Loos loos@slac. stanford. edu
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 13 Sep 2011 APE Meeting 3 3 Henrik Loos loos@slac. stanford. edu
LCLS HLSs for FACET Wire scan, emittance, profile monitor, correlation plot, Matlab model 13 Sep 2011 APE Meeting 4 4 Henrik Loos loos@slac. stanford. edu
FACET THz Experiment Simulations of spectrum and beam size Measured spectrum Simulated spectrum Water absorption λ = 100 µm Vertical Size 2. 4 µm Horizontal Size 2. 9 µm Data from A. Fisher & Z. Wu 13 Sep 2011 APE Meeting 5 5 Henrik Loos loos@slac. stanford. edu
2 D 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 2 D calculation 1 mm x 250 um e-beam TR 2 D Calculation TR 1 D Calculation 13 Sep 2011 APE Meeting 6 6 Henrik Loos loos@slac. stanford. edu
Transport Matrix Measurement Measure jitter orbits or phase space grid oscillations Non-invasive jitter measurement Generate grid in normalized phase space with two correctors 13 Sep 2011 APE Meeting 7 7 Henrik Loos loos@slac. stanford. edu
LTU Matching Prediction Predict lattice functions in LTU from LI 28 emittance measurement and R-matrix measurements 13 Sep 2011 APE Meeting 8 8 Henrik Loos loos@slac. stanford. edu
Fast Emittance Measurement Orbit bump at wires in LI 28 Emittance in 1 plane < 10 s Agrees with scanning wire 13 Sep 2011 APE Meeting 9 9 Henrik Loos loos@slac. stanford. edu
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 13 Sep 2011 APE Meeting 10 10 Henrik Loos loos@slac. stanford. edu
