pcvd diamond beam position monitors for PETRA III

Transcription

1 pcvd diamond beam position monitors for PETRA III Eckhard Wörner Diamond Materials GmbH Tullastraße 72, Freiburg, Germany CARAT workshop /39

2 Outline Some news about Diamond Materials pcvd diamond beam position monitors for PETRA III CARAT workshop /39

3 Fraunhofer IAF / Micronas Fraunhofer IAF Micronas GmbH CARAT workshop /39

4 Low pressure deposition of diamond: CVD: Chemical Vapor Deposition H, CH 4 2 Microwave-Plasma T = C CVD Diamond CARAT workshop /39

5 Synthesis Isolated crystallites (nucleation) polycrystalline plate CARAT workshop /39

6 Proprietary deposition technology: P6 6 kw 2.45 GHz CARAT workshop /39

7 Ultraflat diamond windows 1.5 diamond windows Planarity λ/10 Wavefront distortion λ/5 CARAT workshop /39

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

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

10 Polycrystalline diamond membranes CARAT workshop /39

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

12 Outline Some news about Diamond Materials pcvd diamond beam position monitors for PETRA III CARAT workshop /39

13 PETRA III at DESY Hamburg CARAT workshop /39

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 CARAT workshop /39

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 CARAT workshop /39

16 pcvd diamond beam position monitors for PETRA III diamond converts X-rays into visible light can handle high power is transparent fluorescence detectors CARAT workshop /39

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

18 CARAT workshop /39 Get the beam into the frontend

19 CARAT workshop /39 Get the beam into the frontend

20 CARAT workshop /39 Get the beam into the frontend

21 CARAT workshop /39 Get the beam into the frontend

22 CARAT workshop /39 Get the beam into the frontend

23 CARAT workshop /39 Get the beam into the frontend

24 CARAT workshop /39 Get the beam into the frontend

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

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

27 pcvd diamond quadrant detectors for PETRA III photodetectors solid state ionization chamber quadrant detectors for beam monitoring CARAT workshop /39

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 CARAT workshop /39

29 X-ray absorption in diamond transmission µm 2µm 5µm 10µm 100µm 40% absorption 2.5 kev X-rays 10µm diamond energy (ev)

30 Measurements at DIAMOND I24 Microfocus beamline µm gap 0.2mm stepwidth signal (arb. units) position (mm) Photon Energy : kev Flux: ph/s Beam size: 12x12 µm 2 Velocity: 0.5s/step CARAT workshop /39

31 Measurements at DIAMOND I24 Microfocus beamline µm gap 2 µm stepwidth signal (arb. units) position (µm) Photon Energy : kev Flux: ph/s Beam size: 12x12 µm 2 Velocity: 0.5s/step CARAT workshop /39

32 Measurements at DIAMOND I24 Microfocus beamline µm gap 10 µm stepwidth signal (arb. units) position (mm) Photon Energy : kev Flux: ph/s Beam size: 12x12 µm 2 Velocity: 0.5s/step CARAT workshop /39

33 pcvd diamond beam position monitors for PETRA III photodetectors CARAT workshop /39

34 pcvd diamond quadrant detectors for PETRA III single crystals? not yet photodetectors CARAT workshop /39

35 CARAT workshop /39