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Grazing incidence wide angle x-ray scattering at the wiggler beamline BW4 of HASYLAB
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10.1063/1.3488459
/content/aip/journal/rsi/81/10/10.1063/1.3488459
http://aip.metastore.ingenta.com/content/aip/journal/rsi/81/10/10.1063/1.3488459
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic representation of the GIWAXS geometry. The sample surface is placed horizontally. The x-ray beam with wavelength impinges on the sample surface with a fixed angle of incidence . The scattered beam is described by the exit angle and the horizontal scattering angle . The area detector resembles the dependence along the horizontal axis and the dependence along the vertical axis (neglecting the small dependence). The detected two-dimensional scattering pattern shows the wide angle scattering originating from the sample. The primary beam and the intensity from the small angle scattering (GISAXS signal) are shielded with a rodlike beam stop.

Image of FIG. 2.
FIG. 2.

Photograph of the GIWAXS setup at BW4. The sample position is located where the arrows indicating the knife edge and the incoming x-ray beam coincide. CCD denotes the MarCCD 165 detector with the sample-to-detector distance . The movable frame in front of the CCD accommodates the rodlike beam stop.

Image of FIG. 3.
FIG. 3.

GIWAXS patterns of the bare glass substrate (a) without and (b) with the knife edge as recorded with the MarCCD 165 detector. For the two-dimensional intensity distribution, the horizontal (or out-of-plane) component of the scattering vector is plotted along the -axis, and the vertical (or in-plane) component of the scattering vector is plotted along the -axis. The intensity is shown on a linear scale. For color coding, see the scale bar (dark corresponds to low intensity and bright corresponds to high intensity). The high small angle scattering intensity (or GISAXS signal) is partially covered by a rodlike beam stop.

Image of FIG. 4.
FIG. 4.

Top view of schematic representations of the different beamline configurations during sample alignment (a) and measurements for GISAXS (b), GIWAXS (c) and presently available configurations for successive or simultaneous GISAXS/GIWAXS (d) with exchanged detectors (e). The direction of the x-ray beam is indicated by the arrow. The basic components are presented by the moveable MarCCD detector (CCD) for GIWAXS with the moveable beam stop frame (m), an additional area detector (d) for GISAXS, the sample (s), and the evacuated flight tubes (f) with a diode beam stop (b) mounted in the rear part. CCD (gray box) solely refers to the MarCCD detector, whereas the abbreviation D (blue box) denotes any additional detector, i.e., MarCCD 165, Pilatus 300 k or 1 M.

Image of FIG. 5.
FIG. 5.

GIWAXS pattern of the thin conjugated polymer film of P3OT spin coated onto a glass slide as recorded with the MarCCD 165 detector. For the two-dimensional intensity distribution, the horizontal (or out-of-plane) component of the scattering vector is plotted along the -axis, and the vertical (or in-plane) component of the scattering vector is plotted along the -axis. The intensity is shown on a linear scale. For color coding, see the scale bar (dark corresponds to low intensity and bright corresponds to high intensity). The high small angle scattering intensity or GISAXS signal is covered by a rodlike beam stop (shaded area). The observed diffraction peaks are labeled according to the Miller indices .

Image of FIG. 6.
FIG. 6.

One-dimensional scattering intensity curves obtained by azimuthal integration of radial slices from the GIWAXS pattern as indicated by the pictograms: the solid line is for the azimuthal range of 0°–5° (-direction), and the dotted line is for the azimuthal range of 85°–95° (-direction). The -position the powder ring originating from the glass substrate is indicated in the plot. The shaded area represents the beam stop where scattering data are unavailable.

Image of FIG. 7.
FIG. 7.

The corresponding GISAXS pattern of the thin conjugated polymer film of P3OT spin coated onto a glass slide as recorded with the MarCCD 165 detector. For the two-dimensional intensity distribution, the horizontal (or out-of-plane) component of the scattering vector is plotted along the -axis, and the vertical (or in-plane) component of the scattering vector is plotted along the -axis. The intensity is shown on a logarithmic scale. For color coding, see the scale bar (dark corresponds to low intensity and bright corresponds to high intensity). The detected 2D scattering pattern shows the diffuse scattering with a Yoneda region (off-specular scattering maxima) and the specular peak (shielded by a small pointlike beam stop that protects the detector from the very high intensity of the specularly reflected beam).

Image of FIG. 8.
FIG. 8.

(a) Vertical cut of the GISAXS pattern at horizontal scattering angle . The scattering intensity is plotted vs the sum of and . The shaded area corresponds to the position of the specular beam stop. The inset shows a zoom-in of the Yoneda region. The visible intensity modulation corresponds to correlated roughness of the P3OT film on top of the glass substrate. (b) Double-logarithmic plot of the horizontal cut (symbols) of the GISAXS pattern as a function of the component of the scattering vector. The solid line is the mathematical fit for determining the characteristic lateral length scales of the P3OT thin film. Features originating from the obtained characteristic lateral length scales are marked with the arrows. The dashed line indicates the resolution limit of the GISAXS experiment.

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/content/aip/journal/rsi/81/10/10.1063/1.3488459
2010-10-15
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Grazing incidence wide angle x-ray scattering at the wiggler beamline BW4 of HASYLAB
http://aip.metastore.ingenta.com/content/aip/journal/rsi/81/10/10.1063/1.3488459
10.1063/1.3488459
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