Performance of the new biological small- and wide-angle X-ray scattering beamline 13A at the Taiwan Photon Source

Shih, O.; Liao, K.-F.; Yeh, Y.-Q.; Su, C.-J.; Wang, C.-A.; Chang, J.-W.; Wu, W.-R.; Liang, C.-C.; Lin, C.-Y.; Lee, T.-H.; Chang, C.-H.; Chiang, L.-C.; Chang, C.-F.; Liu, D.-G.; Lee, M.-H.; Liu, C.-Y.; Hsu, T.-W.; Mansel, B.; Ho, M.-C.; Shu, C.-Y.; Lee, F.; Yen, E.; Lin, T.-C.; Jeng, U.

doi:10.1107/S1600576722001923

Figure 9
(a) Standard calibration of the SWAXS q value of the TPS 13A endstation using mixed powders of silver behenate (periodic peaks marked) and LaB₆ standards (two characteristic peaks q₁ and q₂ indicated). An alignment factor is determined by scaling the SAXS data taken by Eiger X 9M and the WAXS data taken by Eiger X 1M. The factor is applied to all the subsequent SWAXS measurements. (b) SWAXS data of deionized water. The profile is scaled (with a scaling factor f) to reach an extrapolated (dotted line) I(0) value at 283 K, as indicated. The broad WAXS peak at ca 1.975 Å⁻¹ corresponds to the water correlation length. (c) SWAXS data measured for high-density polyethylene. The data are calibrated by the standard procedure of water scattering and can serve as a secondary standard for q position and absolute intensity, using the calibrated values indicated. (d) USAXS data of SiO₂ particles in solution, using a 10 keV beam and SD = 10.0 m. The data are fitted (solid curve) with 5% polydisperse core–shell spheres with a mean core diameter of 284 ± 11 nm and a shell thickness of 3.6 nm (with a slightly lower scattering length density than the core).

JOURNAL OF
APPLIED
CRYSTALLOGRAPHY

ISSN: 1600-5767

Volume 55| Part 2| April 2022| Pages 340-352

https://doi.org/10.1107/S1600576722001923

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