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pCVD diamond beam position monitors for PETRA III

pCVD diamond beam position monitors for PETRA III. Eckhard Wörner Diamond Materials GmbH Tullastraße 72, 79108 Freiburg, Germany. Outline. Some news about “Diamond Materials”. pCVD diamond beam position monitors for PETRA III. Fraunhofer IAF / Micronas. Fraunhofer IAF. Micronas GmbH.

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pCVD diamond beam position monitors for PETRA III

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  1. pCVD diamond beam position monitors for PETRA III Eckhard Wörner Diamond Materials GmbH Tullastraße 72, 79108 Freiburg, Germany

  2. Outline • Some news about “Diamond Materials” • pCVD diamond beam position monitors for PETRA III

  3. Fraunhofer IAF / Micronas Fraunhofer IAF Micronas GmbH

  4. Low pressure deposition of diamond:CVD: Chemical Vapor Deposition

  5. Synthesis Isolated crystallites (nucleation) polycrystalline plate

  6. Proprietary deposition technology: P6 6 kW 2.45 GHz

  7. Ultraflat diamond windows 1.5” diamond windows Planarity /10 Wavefront distortion/5

  8. Superpolished diamond substrates Peak to valley ±5nm Ra < 1nm Diameter 10mm

  9. Nanocrystalline diamond films and plates thickness 50nm to 50µm roughness as low as 20nm renucleation results in mirror grade surface finish

  10. Polycrystalline diamond membranes

  11. Polycrystalline diamond membranes Polished > 2µm / Ø: 10mm Unpolished > 50nm Ø: 1mm

  12. Outline • Some news about “Diamond Materials” • pCVD diamond beam position monitors for PETRA III

  13. PETRA III at DESY Hamburg

  14. Fluorescence screens … to get the beam into the beamline … to align the beam … to detect obstacles … to examine the beam profile Diamond Light Source

  15. Fluorescence screens … to get the beam into the beamline … to align the beam … to detect obstacles … to examine the beam profile Diamond Light Source

  16. pCVD diamond beam position monitors for PETRA III diamond … converts X-rays into visible light … can handle high power … is transparent fluorescence detectors

  17. CVD diamond fluorescence screens (measured at ESRF / ID6) Fluorescence excited by a low power undulator beam (ESRF/ID6) view of the camera

  18. Get the beam into the frontend

  19. Get the beam into the frontend

  20. Get the beam into the frontend

  21. Get the beam into the frontend

  22. Get the beam into the frontend

  23. Get the beam into the frontend

  24. Get the beam into the frontend

  25. Spectral fluorescence yield (measured at ESRF/ID6) Screens for white and monochromatic beams Luminosity strongly energy dependent

  26. Quadrant detectors for X-ray synchrotron PETRA III Idea: Online beam monitoring as a feedback for X-ray mirrors (Typical energies: 2.5-35 keV) Diamond Light Source

  27. pCVD diamond quadrant detectors for PETRA III “solid state ionization chamber” photodetectors quadrant detectors for beam monitoring

  28. pCVD diamond quadrant detectors for PETRA III • high quality pCVD diamond • membrane supported by silicon ring • open diameter: 10mm • structured metallization (20µm gap) • membrane thickness < 10µm photodetectors quadrant detectors for beam monitoring

  29. X-ray absorption in diamond 40% absorption 2.5 keV X-rays 10µm diamond

  30. Measurements at DIAMOND I24 Microfocus beamline 500 µm gap 0.2mm stepwidth Photon Energy : 12.68 keV Flux: 1012 ph/s Beam size: 12x12 µm2 Velocity: 0.5s/step

  31. Measurements at DIAMOND I24 Microfocus beamline 20 µm gap 2 µm stepwidth Photon Energy : 12.68 keV Flux: 1012 ph/s Beam size: 12x12 µm2 Velocity: 0.5s/step

  32. Measurements at DIAMOND I24 Microfocus beamline 500 µm gap 10 µm stepwidth Photon Energy : 12.68 keV Flux: 1012 ph/s Beam size: 12x12 µm2 Velocity: 0.5s/step

  33. pCVD diamond beam position monitors for PETRA III photodetectors

  34. pCVD diamond quadrant detectors for PETRA III single crystals? „not yet” photodetectors

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