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Ljubljana, July 2011 Physics on synchrotrons and computers Alojz Kodre Faculty of Math & Physics, University of Ljubljana.

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Presentation on theme: "Ljubljana, July 2011 Physics on synchrotrons and computers Alojz Kodre Faculty of Math & Physics, University of Ljubljana."— Presentation transcript:

1 Ljubljana, July 2011 Physics on synchrotrons and computers Alojz Kodre Faculty of Math & Physics, University of Ljubljana

2 X-rays Wilhelm Röntgen, 1896,  = 0,01 - 10 nm  = 3.10 16 – 3.10 19 Hz h = 100 eV – 200 keV Ljubljana, July 2011

3 Synchrotron storage ring beame+e+ path289.2 m W4.45 GeV  = W/m 0 c 2 8690 c - v  c/2  2 ~ 2 m/s T = o/v ~ 1  s I 120 mA Np = I·T/e 0 10 12 p ~ 6 · 10 -10 mbar N/V = pNA/(RT) ~10 4 /(mm) 3 N f /t 10 10 s -1 DORIS, DESY Hamburg Ljubljana, July 2011

4 Synchrotron - an extremely bright source of UV and X-ray light Ljubljana, July 2011

5 DESY, Hamburg Ljubljana, July 2011

6 Elettra, Trieste Ljubljana, July 2011

7 ESRF, Grenoble Ljubljana, July 2011

8 Brightness of different light sources Ljubljana, July 2011

9 X-ray diffraction on crystalls: information on the distribution of atoms in the material Ljubljana, July 2011

10 Protein Structure by X-Ray Diffraction Protein – a molecule of ~ 10.000 atoms Diffraction pattern of the protein. Ljubljana, July 2011

11 X-ray diffraction on disordered materials provides almost no structure information Ljubljana, July 2011

12 Absorption spectroscopy Ljubljana, July 2011

13 energy scattering Compton scattering Rayleigh absorption relative absorption coefficient Ljubljana, July 2011 X-ray absorption

14 Ljubljana, July 2011 Absorption edges

15 Cu K edge Ljubljana, July 2011

16 Zn K edge – experiment and model Ljubljana, July 2011

17 Ar Ljubljana, July 2011

18 Metal-vapor cells Ljubljana, July 2011

19 Cd vapor : metal Ljubljana, July 2011

20 Iodine atomic gel spline atomski pare 950 ºC trden atomic vapour 950 °C solid

21 Ljubljana, July 2011 Atomic absorption Ga-Kr

22 EXAFS – Extended X-ray Absorption Fine Structure constructive interference destructive interference

23 Rh

24 MoSI nanowires Ljubljana, July 2011

25 SrTiO 3

26

27 Ljubljana, July 2011

28 New devices wiggler undulator rentgenski laser Ljubljana, July 2011

29 DESY, Hamburg PETRA

30 XFEL – X-ray Free Electron Laser

31

32 Ljubljana, July 2011 The group at Hasylab

33

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