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Overview BCM / CRD

Overview BCM / CRD. Coherent Diagnostic. Baseline Design. CRD B1 & B2 only work with TR ! (fallback if problems with TDS) Off axis screen Kicker Single bunch CRD @ 17.5GeV with DR Decide on location before / after collimator Effects from (C)SR BCM 5.1 & 5.2 or 5 before distribution.

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Overview BCM / CRD

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  1. Overview BCM / CRD Coherent Diagnostic

  2. Baseline Design • CRD B1 & B2 only work with TR! (fallback if problems with TDS) • Off axis screen • Kicker • Single bunch • CRD @ 17.5GeV with DR • Decide on location before / after collimator • Effects from (C)SR • BCM 5.1 & 5.2 or 5 before distribution

  3. Longitudinal Parameters XFEL Source: simulations I. Zagorodnov, early 2011

  4. What can be Measured? FormFactors!

  5. Typical Station e- screen window IR / THz detector(s) mirror filter(s)

  6. Multichannel @ FLASH S. Wesch

  7. Multichannel @ SITF

  8. Design DR Chamber • Design to be finalized by end of 2013 • Fixed / variable slits • Mover: VAB or MDI or ??

  9. 1. CDR Simulation @ 17.5GeV • Incoherent diffraction radiation • E = 17.5GeV • q = 50pC • 4mm hole in 20mm foil THz Transport, B. Schmidt

  10. Detectors

  11. ALS homepage

  12. Open Questions • Positions of BCMs and CRD(s) • CRD before or after collimator  problems with SR?? • Screens: fixed or variable slits • Speed of detectors • Detectors to cover frequency range after BC2 • Filters for BCMs • Windows for all stations • Single shot capability of spectrometer

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