Micro focus setups (< 2019)

switchable focus setups.jpg

We have installed the post-focussing equipment on a translation table to permit fast switching between setups

(Kirkpatrick-Baez mirrors to the right in the image and Beryllium lenses to the left).

Post focusing Kirkpatrick-Baez System (KB) mirrors
20 µm beam Focus distance ~175mm


Without KB 250 x 250 µm²	Focused with KB 25 x 25 µm²

Example science: Micro injection molded polypropylene measured with KB mirrors:

Saxs	iPP	Waxs

van Drongelen, M., Meijer-Vissers, T., Cavallo, D., Portale, G., Poel, G. V., & Androsch, R., Microfocus wide-angle X-ray scattering of polymers crystallized in a fast scanning chip calorimeter, Thermochimica Acta (2013) 10, 33-37; doi:10.1016/j.tca.2013.04.007

Be Lenses
50 µm beam		Reference: A. Snigirev, V. Kohn, I. Snigireva & B. Lengeler A compound refractive lens for focusing high-energy X-rays Nature 384, 49 - 51 (07 November 1996); doi:10.1038/384049a0
Focus distance ~7-8m

Example science:
		reference: V. Petukhov, D. Aarts, I. P. Dolbnya, E. H. A. de Hoog, K. Kassapidou, G. J. Vroege, W. Bras and H. N. W. Lekkerkerker, High-resolution small-angle X-ray diffraction study of long-range order in hard-sphere colloidal crystals, Physical Review Letters 88 (2002), no. 20.
		A.V. Petukhov, D. van der Beek, R.P.A. Dullens, I.P. Dolbnya, G.J. Vroege, H.N.W. Lekkerkerker, Observation of a Hexatic Columnar Liquid Crystal of Polydisperse Colloidal Disks, Phys. Rev. Lett., 95, 077801 (2005) http://dx.doi.org/10.1103/PhysRevLett.95.077801

More pictures here.

Post focusing Kirkpatrick-Baez System (KB) mirrors