1. CARAT workshop 13-15.12.09 1/39 pCVD diamond beam position monitors for PETRA III Eckhard Wörner Diamond Materials GmbH Tullastraße 72, 79108 Freiburg, Germany

2. CARAT workshop 13-15.12.09 2/39 Outline Some news about “Diamond Materials” pCVD diamond beam position monitors for PETRA III

3. CARAT workshop 13-15.12.09 3/39 Fraunhofer IAF / Micronas Fraunhofer IAF Micronas GmbH

4. CARAT workshop 13-15.12.09 4/39 Low pressure deposition of diamond: CVD: Chemical Vapor Deposition

5. CARAT workshop 13-15.12.09 5/39 Synthesis Isolated crystallites (nucleation) polycrystalline plate

6. CARAT workshop 13-15.12.09 6/39 Proprietary deposition technology: P6 6 kW 2.45 GHz

7. CARAT workshop 13-15.12.09 7/39 Ultraflat diamond windows Planarity /10 1.5” diamond windows Wavefront distortion /5

8. CARAT workshop 13-15.12.09 8/39 Superpolished diamond substrates Peak to valley ±5nm Ra < 1nm Diameter 10mm

9. CARAT workshop 13-15.12.09 9/39 Nanocrystalline diamond films and plates thickness 50nm to 50µm roughness as low as 20nm renucleation results in mirror grade surface finish

10. CARAT workshop 13-15.12.09 10/39 Polycrystalline diamond membranes

11. CARAT workshop 13-15.12.09 11/39 Polycrystalline diamond membranes Polished > 2µm / Ø: 10mm Unpolished > 50nm Ø: 1mm

12. CARAT workshop 13-15.12.09 12/39 Outline Some news about “Diamond Materials” pCVD diamond beam position monitors for PETRA III

13. CARAT workshop 13-15.12.09 13/39 PETRA III at DESY Hamburg

14. CARAT workshop 13-15.12.09 14/39 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. CARAT workshop 13-15.12.09 15/39 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. CARAT workshop 13-15.12.09 16/39 pCVD diamond beam position monitors for PETRA III fluorescence detectors diamond … converts X-rays into visible light … can handle high power … is transparent

17. CARAT workshop 13-15.12.09 17/39 CVD diamond fluorescence screens (measured at ESRF / ID6) Fluorescence excited by a low power undulator beam (ESRF/ID6) view of the camera

18. CARAT workshop 13-15.12.09 18/39 Get the beam into the frontend

19. CARAT workshop 13-15.12.09 19/39 Get the beam into the frontend

20. CARAT workshop 13-15.12.09 20/39 Get the beam into the frontend

21. CARAT workshop 13-15.12.09 21/39 Get the beam into the frontend

22. CARAT workshop 13-15.12.09 22/39 Get the beam into the frontend

23. CARAT workshop 13-15.12.09 23/39 Get the beam into the frontend

24. CARAT workshop 13-15.12.09 24/39 Get the beam into the frontend

25. CARAT workshop 13-15.12.09 25/39 Spectral fluorescence yield (measured at ESRF/ID6) Screens for white and monochromatic beams Luminosity strongly energy dependent

26. CARAT workshop 13-15.12.09 26/39 Quadrant detectors for X-ray synchrotron PETRA III Diamond Light Source Idea: Online beam monitoring as a feedback for X-ray mirrors (Typical energies: 2.5-35 keV)

27. CARAT workshop 13-15.12.09 27/39 pCVD diamond quadrant detectors for PETRA III photodetectors quadrant detectors for beam monitoring “solid state ionization chamber”

28. CARAT workshop 13-15.12.09 28/39 pCVD diamond quadrant detectors for PETRA III photodetectors high quality pCVD diamond membrane supported by silicon ring open diameter: 10mm structured metallization (20µm gap) membrane thickness < 10µm quadrant detectors for beam monitoring

29. CARAT workshop 13-15.12.09 29/39 X-ray absorption in diamond 40% absorption 2.5 keV X-rays 10µm diamond

30. CARAT workshop 13-15.12.09 30/39 Measurements at DIAMOND I24 Microfocus beamline 500 µm gap 0.2mm stepwidth Photon Energy : 12.68 keV Flux: 10 12 ph/s Beam size: 12x12 µm 2 Velocity: 0.5s/step

31. CARAT workshop 13-15.12.09 31/39 Measurements at DIAMOND I24 Microfocus beamline 20 µm gap 2 µm stepwidth Photon Energy : 12.68 keV Flux: 10 12 ph/s Beam size: 12x12 µm 2 Velocity: 0.5s/step

32. CARAT workshop 13-15.12.09 32/39 Measurements at DIAMOND I24 Microfocus beamline Photon Energy : 12.68 keV Flux: 10 12 ph/s Beam size: 12x12 µm 2 Velocity: 0.5s/step 500 µm gap 10 µm stepwidth

33. CARAT workshop 13-15.12.09 33/39 pCVD diamond beam position monitors for PETRA III photodetectors

34. CARAT workshop 13-15.12.09 34/39 pCVD diamond quadrant detectors for PETRA III photodetectors single crystals? „not yet”