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Englund, Carl-Johan
Publications (2 of 2) Show all publications
Englund, C.-J., Agåker, M., Fredriksson, P., Olsson, A., Johansson, N., Rubensson, J.-E. & Nordgren, J. (2015). An ultra-high vacuum chamber for scattering experiments featuring in-vacuum continuous in-plane variation of the angle between entrance and exit vacuum ports. Review of Scientific Instruments, 86(9), Article ID 095110.
Open this publication in new window or tab >>An ultra-high vacuum chamber for scattering experiments featuring in-vacuum continuous in-plane variation of the angle between entrance and exit vacuum ports
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2015 (English)In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 86, no 9, article id 095110Article in journal (Refereed) Published
Abstract [en]

A concept that enables in-vacuum continuous variation of the angle between two ports in one plane has been developed and implemented. The vacuum chamber allows for measuring scattering cross sections as a function of scattering angle and is intended for resonant inelastic X-ray scattering experiments. The angle between the ports can be varied in the range of 30 degrees-150 degrees, while the pressure change is less than 2 x 10(-10) mbars.

National Category
Physical Sciences
Identifiers
urn:nbn:se:uu:diva-265596 (URN)10.1063/1.4931041 (DOI)000362573300062 ()26429483 (PubMedID)
Funder
Knut and Alice Wallenberg Foundation
Available from: 2015-11-02 Created: 2015-11-02 Last updated: 2017-12-01
Hellsing, M. S., Rennie, A. R., Porcar, L. & Englund, C.-J. (2011). Scattering from Dilute and Lamellar Phase Solutions of Aerosol-OT Simultaneous Probe of Surface Structures and Bulk. In: Viktor Starov, Karel Procházka (Ed.), Trends in colloid andinterface science XXIV. Paper presented at 24th Meeting of the European-Colloid-and-Interface-Society (ECIS), September 5-10, 2010, Prague, Czech Republic (pp. 139-142). , 138
Open this publication in new window or tab >>Scattering from Dilute and Lamellar Phase Solutions of Aerosol-OT Simultaneous Probe of Surface Structures and Bulk
2011 (English)In: Trends in colloid andinterface science XXIV / [ed] Viktor Starov, Karel Procházka, 2011, Vol. 138, p. 139-142Conference paper, Published paper (Refereed)
Abstract [en]

The benefits of simultaneous studies of adsorbed layers and bulk structures are shown for solutions of the surfactant Aerosol-OT. Above the critical micelle concentration, Aerosol-OT forms an aligned lamellar phase at the sapphire/solution interface which is in equilibrium with a bulk phase that consists of coexisting micellar solution and dispersed lamellar phase. Measurements of the aligned surface layers and the bulk scattering from a 2% wt solution by grazing incidence and small-angle neutron scattering show that the bulk consist of lamellar structures with the same d-spacing as seen at the surface but without the surface induced alignment. The surface lamellar structure corresponds to a 10% volume fraction for a 2% wt bulk which implies that there must be coexistence of regions of different concentration. Scattering patterns measured in grazing incidence geometry clearly show the relative contributions from small-angle scattering and specular reflectivity.

Series
Progress in Colloid and Polymer Science, ISSN 0340-255X ; 138
Keywords
sodium bis 2-ethylhexyl sulfosuccinate, lamellar phase, scattering
National Category
Polymer Chemistry
Identifiers
urn:nbn:se:uu:diva-160883 (URN)10.1007/978-3-642-19038-4_24 (DOI)000295091800024 ()9783642190377 (ISBN)
Conference
24th Meeting of the European-Colloid-and-Interface-Society (ECIS), September 5-10, 2010, Prague, Czech Republic
Available from: 2011-11-02 Created: 2011-11-02 Last updated: 2011-11-02Bibliographically approved
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