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 Results for by Helliwell, J. R.
SR monochromatic and Laue diffraction geometry
Helliwell, J. R., International Tables for Crystallography (2012). Vol. F, Section 8.1.7, p. [ doi:10.1107/97809553602060000822 ]
(1987). The mosaic spread of very small crystals deduced from Laue diffraction patterns. Acta Cryst. A 43, 70–73. Google Scholar Arzt, S., Campbell, J. W., Harding, M. M., Hao, Q. & Helliwell, J. R. (1999). LSCALE – the new ...

Double-crystal monochromator
Helliwell, J. R., International Tables for Crystallography (2012). Vol. F, Section 8.1.7.2.2, p. [ doi:10.1107/97809553602060000822 ]
in the reflected monochromatic beam is determined by the source divergence accepted by the monochromator, the angular size of the source and the monochromator rocking width (see Fig. 8.1.7.2). The double-crystal monochromator is often used with a toroidal ...

Laue geometry: sources, optics, sample reflection bandwidth and spot size
Helliwell, J. R., International Tables for Crystallography (2012). Vol. F, Section 8.1.7.1, p. [ doi:10.1107/97809553602060000822 ]
Q. & Helliwell, J. R. (1999). LSCALE – the new normalization, scaling and absorption correction program in the Daresbury Laue software suite . J. Appl. Cryst. 32, 554–562. Google Scholar Campbell, J. W. & Hao, Q. (1993 ...

Crystal sample rocking width
Helliwell, J. R., International Tables for Crystallography (2012). Vol. F, Section 8.1.7.2.4, p. [ doi:10.1107/97809553602060000822 ]
C., Pifferi, A., Spagna, R. & Helliwell, J. R. (1992). The X-ray diffraction station at the ADONE wiggler facility: preliminary results (including crystal perfection). J. Appl. Cryst. 25, 192–194. Google Scholar ...

Curved single-crystal monochromator
Helliwell, J. R., International Tables for Crystallography (2012). Vol. F, Section 8.1.7.2.1, p. [ doi:10.1107/97809553602060000822 ]
crystal, there is a gradual change in the photon wavelength selected from the white beam as the length of the monochromator is traversed (Fig. 8.1.7.1 a). For a point source and a curved monochromator crystal, one specific curvature can compensate ...

Widening of monochromatic wavelength range provision
Helliwell, J. R., International Tables for Crystallography (2012). Vol. F, Section 8.1.7.2.3, p. [ doi:10.1107/97809553602060000822 ]
with machine and beamline specifications. References Cianci, M., Helliwell, J. R. & Suzuki, A. (2008). The interdependence of wavelength, redundancy and dose in sulfur SAD experiments . Acta Cryst. D 64, 1196–1209. Google ...

Monochromatic SR beams: optical configurations and sample rocking width
Helliwell, J. R., International Tables for Crystallography (2012). Vol. F, Section 8.1.7.2, p. [ doi:10.1107/97809553602060000822 ]
. References Bonse, U., Materlik, G. & Schröder, W. (1976). Perfect-crystal monochromators for synchrotron X-radiation. J. Appl. Cryst. 9, 223–230. Google Scholar Cianci, M., Helliwell, J. R. & Suzuki, A. (2008 ...

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