1 / 20

XFEL AMTF Cavity and Module RF Measurement Procedures

XFEL AMTF Cavity and Module RF Measurement Procedures. Hamburg 2013.05.28 European Linear Collider Workshop ECFA LC2013 Krzysztof Krzysik. RF Team has to test …. 840 Cavities. 103 Modules. Test of Cavity. Spectrum measurement (warm). Array of points (freq, S21) input-pickup

brennan-frank
Download Presentation

XFEL AMTF Cavity and Module RF Measurement Procedures

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. XFEL AMTF Cavity and Module RF Measurement Procedures Hamburg 2013.05.28 European Linear Collider Workshop ECFA LC2013 Krzysztof Krzysik

  2. RF Team has to test … 840 Cavities 103 Modules

  3. Test of Cavity

  4. Spectrum measurement (warm) • Array of points (freq, S21)input-pickup • Frequencies of fundamental modes • “Field flatness”

  5. HOM couplers tuning • Setting up minimum of the rejection filter: hom1, hom2 • Array of points (freq, S21)pickup-hom1 / input-hom2

  6. Cables connection (insert) and TDR check • Cables connection in insert • Circuit check (discontinuity, short) with Time Domain Reflectometry

  7. Vertical test-stand - schematic

  8. Cable connection (test-stand) and calibration • Cable connection in test-stand • Calibration – power correction measurement

  9. Spectrum measurement (cold) • Frequencies of fundamental modes • Lock on 9/9π mode • Phase (Pfor, Ptrans)

  10. Power rising (qe curves) • Max Eacc (limitation) • Q0-factor vs. Eacc • Radiation vs. Eacc

  11. Test of Module

  12. Warm coupler conditioning /Coupler conditioning during cool-down • Removal of impurities from the couplers • Sequence of pulses (power, length)out of resonance • Warm: room temperature, cool-down: up to 100K

  13. Cold cables calibration • Cold cables calibration – reflection mode (S11)

  14. Cavities tuning with VNA / Qextadjustment • Cavities tuning near resonance: with VNA and tuning application (rough frequency tuning) • Qext adjustment: with VNA (manually) or with klystron (motors on couplers)

  15. HOM spectra measurement • Frequencies and Qhom1 / hom2for TM011, TE111 and TM110 peaks.

  16. Cavities fine tuning • Cavities fine tuning – with LLRF Monitoring system and Tuning Application

  17. Cavities calibration • Cavities calibration (before flat-top): • Kt • Qload, Qtrans, Qhom1, Qhom2

  18. Cavities performance test (flat-top) • Max Eacc (limitation) • Eacc @ radiation = 10-2mGy/min (operating gradient)

  19. Heat loads measurement • Heat loads • ~ Q0-factor vs. Eacc

  20. Thank You for Your attention

More Related