pcvd diamond beam position monitors for PETRA III Eckhard Wörner Diamond Materials GmbH Tullastraße 72, 79108 Freiburg, Germany CARAT workshop 13-15.12.09 1/39
Outline Some news about Diamond Materials pcvd diamond beam position monitors for PETRA III CARAT workshop 13-15.12.09 2/39
Fraunhofer IAF / Micronas Fraunhofer IAF Micronas GmbH CARAT workshop 13-15.12.09 3/39
Low pressure deposition of diamond: CVD: Chemical Vapor Deposition H, CH 4 2 Microwave-Plasma T = 700-900 C CVD Diamond CARAT workshop 13-15.12.09 4/39
Synthesis Isolated crystallites (nucleation) polycrystalline plate CARAT workshop 13-15.12.09 5/39
Proprietary deposition technology: P6 6 kw 2.45 GHz CARAT workshop 13-15.12.09 6/39
Ultraflat diamond windows 1.5 diamond windows Planarity λ/10 Wavefront distortion λ/5 CARAT workshop 13-15.12.09 7/39
Superpolished diamond substrates Peak to valley ±5nm Ra < 1nm Diameter 10mm CARAT workshop 13-15.12.09 8/39
Nanocrystalline diamond films and plates thickness 50nm to 50µm roughness as low as 20nm renucleation results in mirror grade surface finish CARAT workshop 13-15.12.09 9/39
Polycrystalline diamond membranes CARAT workshop 13-15.12.09 10/39
Polycrystalline diamond membranes Unpolished > 50nm Ø: 1mm Polished > 2µm / Ø: 10mm CARAT workshop 13-15.12.09 11/39
Outline Some news about Diamond Materials pcvd diamond beam position monitors for PETRA III CARAT workshop 13-15.12.09 12/39
PETRA III at DESY Hamburg CARAT workshop 13-15.12.09 13/39
Fluorescence screens to get the beam into the beamline to align the beam to detect obstacles to examine the beam profile Diamond Light Source 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 CARAT workshop 13-15.12.09 15/39
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 13-15.12.09 16/39
CVD diamond fluorescence screens (measured at ESRF / ID6) Fluorescence excited by a low power undulator beam (ESRF/ID6) view of the camera CARAT workshop 13-15.12.09 17/39
CARAT workshop 13-15.12.09 18/39 Get the beam into the frontend
CARAT workshop 13-15.12.09 19/39 Get the beam into the frontend
CARAT workshop 13-15.12.09 20/39 Get the beam into the frontend
CARAT workshop 13-15.12.09 21/39 Get the beam into the frontend
CARAT workshop 13-15.12.09 22/39 Get the beam into the frontend
CARAT workshop 13-15.12.09 23/39 Get the beam into the frontend
CARAT workshop 13-15.12.09 24/39 Get the beam into the frontend
Spectral fluorescence yield (measured at ESRF/ID6) Screens for white and monochromatic beams Luminosity strongly energy dependent CARAT workshop 13-15.12.09 25/39
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 CARAT workshop 13-15.12.09 26/39
pcvd diamond quadrant detectors for PETRA III photodetectors solid state ionization chamber quadrant detectors for beam monitoring CARAT workshop 13-15.12.09 27/39
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 13-15.12.09 28/39
X-ray absorption in diamond transmission 1.00 0.90 0.80 0.70 0.60 0.50 0.40 0.30 0.20 0.10 1µm 2µm 5µm 10µm 100µm 40% absorption 2.5 kev X-rays 10µm diamond 0.00 100 1000 10000 100000 energy (ev)
Measurements at DIAMOND I24 Microfocus beamline 0.045 0.04 0.035 500 µm gap 0.2mm stepwidth signal (arb. units) 0.03 0.025 0.02 0.015 0.01 0.005 0-2 -1.5-1 -0.5 0 0.5 1 1.5 2 position (mm) Photon Energy : 12.68 kev Flux: 10 12 ph/s Beam size: 12x12 µm 2 Velocity: 0.5s/step CARAT workshop 13-15.12.09 30/39
Measurements at DIAMOND I24 Microfocus beamline 0.03 0.025 20 µm gap 2 µm stepwidth signal (arb. units) 0.02 0.015 0.01 0.005 0-0.005 0 25 50 75 100 125 150 175 200 225 250 position (µm) Photon Energy : 12.68 kev Flux: 10 12 ph/s Beam size: 12x12 µm 2 Velocity: 0.5s/step CARAT workshop 13-15.12.09 31/39
Measurements at DIAMOND I24 Microfocus beamline 0.0008 0.0007 500 µm gap 10 µm stepwidth 0.0006 signal (arb. units) 0.0005 0.0004 0.0003 0.0002 0.0001 0 0.2 0.4 0.6 0.8 1 1.2 position (mm) Photon Energy : 12.68 kev Flux: 10 12 ph/s Beam size: 12x12 µm 2 Velocity: 0.5s/step CARAT workshop 13-15.12.09 32/39
pcvd diamond beam position monitors for PETRA III photodetectors CARAT workshop 13-15.12.09 33/39
pcvd diamond quadrant detectors for PETRA III single crystals? not yet photodetectors CARAT workshop 13-15.12.09 34/39
CARAT workshop 13-15.12.09 35/39