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Olsson, Anders
Publications (10 of 14) Show all publications
Olsson, A., Hellsing, M. S. & Rennie, A. R. (2017). New possibilities using additive manufacturing with materials that are difficult to process and with complex structures. Physica Scripta, 92(5), Article ID 053002.
Open this publication in new window or tab >>New possibilities using additive manufacturing with materials that are difficult to process and with complex structures
2017 (English)In: Physica Scripta, ISSN 0031-8949, E-ISSN 1402-4896, Vol. 92, no 5, article id 053002Article in journal (Refereed) Published
Abstract [en]

Additive manufacturing (or 3D printing) opens the possibility of creating new designs and manufacturing objects with new materials rapidly and economically. Particularly for use with polymers and polymer composites, simple printers can make high quality products, and these can be produced easily in offices, schools and in workshops and laboratories. This technology has opened a route for many to test ideas or to make custom devices. It is possible to easily manufacture complex geometries that would be difficult or even impossible to create with traditional methods. Naturally this technology has attracted attention in many fields that include the production of medical devices and prostheses, mechanical engineering as well as basic sciences. Materials that are highly problematic to machine can be used. We illustrate process developments with an account of the production of printer parts to cope with polymer fillers that are hard and abrasive; new nozzles with ruby inserts designed for such materials are durable and can be used to print boron carbide composites. As with other materials, complex parts can be printed using boron carbide composites with fine structures, such as screw threads and labels to identify materials. General ideas about design for this new era of manufacturing customised parts are presented.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD, 2017
Keywords
additive manufacturing, materials, 3D printing, composites
National Category
Physical Sciences
Identifiers
urn:nbn:se:uu:diva-322706 (URN)10.1088/1402-4896/aa694e (DOI)000399888000001 ()
Available from: 2017-05-29 Created: 2017-05-29 Last updated: 2017-05-29Bibliographically approved
Olsson, A. & Rennie, A. R. (2016). Boron carbide composite apertures for small-angle neutron scattering made by three-dimensional printing. Journal of applied crystallography, 49(2), 696-699
Open this publication in new window or tab >>Boron carbide composite apertures for small-angle neutron scattering made by three-dimensional printing
2016 (English)In: Journal of applied crystallography, ISSN 0021-8898, E-ISSN 1600-5767, Vol. 49, no 2, p. 696-699Article in journal (Refereed) Published
Abstract [en]

Apertures for small-angle neutron scattering prepared from a boron carbide/polymer composite have been made by three-dimensional printing using fused filament fabrication. Use of enriched (B4C)-B-10 gives higher absorption and much lower parasitic scattering than natural B4C. The simple fabrication, the capability to replace toxic and environmentally hazardous materials such as cadmium, and the possibility to diminish the secondary background of gamma-radiation are attractive features of use of these materials. Complex shapes, apart from apertures, can be fabricated readily with this composite, for example, to make shielding for instrument components and masks used to calibrate detectors.

Keywords
apertures, small-angle neutron scattering, boron carbide composites, three-dimensional printing
National Category
Materials Chemistry
Identifiers
urn:nbn:se:uu:diva-295549 (URN)10.1107/S1600576716000534 (DOI)000373702000044 ()
Available from: 2016-06-08 Created: 2016-06-08 Last updated: 2017-11-30Bibliographically approved
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
Rennie, A., Hellsing, M., Lindholm, E. & Olsson, A. (2015). Note: Sample cells to investigate solid/liquid interfaces with neutrons. Review of Scientific Instruments, 86(1), 016115
Open this publication in new window or tab >>Note: Sample cells to investigate solid/liquid interfaces with neutrons
2015 (English)In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 86, no 1, p. 016115-Article in journal (Refereed) Published
Abstract [en]

The design of sample cells to study solid/liquid interfaces by neutron reflection is presented. Use of standardized components and a modular design has allowed a wide range of experiments that include grazing incidence scattering andconventional small-angle scattering. Features that reduce background scattering are emphasized. Various flow arrangements to fill and replenish the liquid in the cell as well as continuous stirring are described.

Keywords
neutron, reflection, solid-liquid interface
National Category
Condensed Matter Physics
Research subject
Physics
Identifiers
urn:nbn:se:uu:diva-242738 (URN)10.1063/1.4906518 (DOI)000349068700079 ()25638142 (PubMedID)
Available from: 2015-01-30 Created: 2015-01-30 Last updated: 2017-12-05Bibliographically approved
Moubah, R., Ahlberg, M., Zamani, A., Olsson, A., Shi, S., Sun, Z., . . . Jönsson, P. E. (2014). Origin of the anomalous temperature dependence of coercivity in soft ferromagnets. Journal of Applied Physics, 116(5), 053906
Open this publication in new window or tab >>Origin of the anomalous temperature dependence of coercivity in soft ferromagnets
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2014 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 116, no 5, p. 053906-Article in journal (Refereed) Published
Abstract [en]

We report on the origin of the anomalous temperature dependence of coercivity observed in some soft ferromagnets by studying the magnetic and electronic properties of FeZr films doped using ion implantation by H, He, B, C, and N. The anomalous increase of the coercivity with temperature was observed only in the C- and B-doped samples. Using x-ray photoelectron spectroscopy, we show that the anomalous behavior of the coercivity coincides with the occurrence of an electron charge transfer for those implanted samples. The origin of the anomaly is discussed in terms of (i) magnetic softness, (ii) nature of the Fe-C and -B covalent bonds, and (iii) large charge transfer. (C) 2014 AIP Publishing LLC.

National Category
Physical Sciences
Identifiers
urn:nbn:se:uu:diva-233598 (URN)10.1063/1.4892038 (DOI)000341178900042 ()
Available from: 2014-10-10 Created: 2014-10-07 Last updated: 2017-12-05Bibliographically approved
Olsson, A., Hellsing, M. S. & Rennie, A. R. (2013). A holder to rotate sample cells to avoid sedimentation in small-angle neutron scattering and ultra small-angle neutron scattering experiments. Measurement science and technology, 24(10), 105901
Open this publication in new window or tab >>A holder to rotate sample cells to avoid sedimentation in small-angle neutron scattering and ultra small-angle neutron scattering experiments
2013 (English)In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 24, no 10, p. 105901-Article in journal (Refereed) Published
Abstract [en]

Sedimentation, or creaming, of samples can significantly alter the amount of material in the beam during small-angle scattering experiments. Simple rotating mounts that ameliorate this effect are described and the design criteria are carefully discussed. A modular design permits simple adaptation to various instruments and different sample cells. Temperature control in the range 10 degrees C below ambient to about +40 degrees C has been implemented using air flow and a Peltier device. Example ultra small-angle neutron scattering data are shown that exploit the simplicity of the mounts and the capability to position several samples close together on a translation stage.

Keywords
small-angle scattering, neutron scattering, sample holder
National Category
Physical Sciences
Identifiers
urn:nbn:se:uu:diva-210592 (URN)10.1088/0957-0233/24/10/105901 (DOI)000324621900050 ()
Available from: 2013-11-11 Created: 2013-11-11 Last updated: 2017-12-06Bibliographically approved
Moubah, R., Zamani, A., Olsson, A., Shi, S., Hallen, A., Carlson, S., . . . Jönsson, P. (2013). Soft Room-Temperature Ferromagnetism of Carbon-Implanted Amorphous Fe93Zr7 Films. APPL PHYS EXPRESS, 6(5), 053001
Open this publication in new window or tab >>Soft Room-Temperature Ferromagnetism of Carbon-Implanted Amorphous Fe93Zr7 Films
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2013 (English)In: APPL PHYS EXPRESS, ISSN 1882-0778, Vol. 6, no 5, p. 053001-Article in journal (Refereed) Published
Abstract [en]

We report on the effect of carbon implantation on the structural, electronic, and magnetic properties of Fe93Zr7 (FeZr) amorphous films. Extended X-ray absorption fine structure measurements on (FeZr)(100-x)C-x (x = 0, 5.5, and 11) indicate the incorporation of carbon in the FeZr matrix, with an increase of the Fe-Fe distance by implanting carbon. X-ray photoelectron spectroscopy measurements reveal the creation of Fe-C bonds after implantation. A significant enhancement of the Curie temperature and decrease of the coercivity are observed in the carbon-implanted films. Moreover, the non collinear ferromagnetism of the as-grown FeZr film diminishes upon carbon implantation.

National Category
Natural Sciences Engineering and Technology
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
urn:nbn:se:uu:diva-202378 (URN)10.7567/APEX.6.053001 (DOI)000318778800029 ()
Available from: 2013-06-24 Created: 2013-06-24 Last updated: 2017-02-01
Agåker, M., Andersson, J., Englund, C.-J., Olsson, A., Ström, M. & Nordgren, J. (2009). Novel instruments for ultra-soft X-ray emission spectroscopy. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 601(1-2), 213-219
Open this publication in new window or tab >>Novel instruments for ultra-soft X-ray emission spectroscopy
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2009 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 601, no 1-2, p. 213-219Article in journal (Refereed) Published
Abstract [en]

Two alternative instrument designs to the traditional Rowland grating spectrometer for high resolution ultra-soft X-ray spectroscopy are presented. The first instrument is a plane grating spectrometer using off-axis parabolic mirrors for collection and refocusing, and with a spatially resolving multichannel detector with delay line read-out. The instrument offers substantially higher performance in terms of resolution and sensitivity than traditional instruments. The second instrument is a Fourier transform spectrometer based on a grazing incidence Mach-Zehnder interferometer using wavefront dividing beamsplitters. The path length difference can be scanned over 0.1 mm, which corresponds to a resolution of 12 meV. (C) 2009 Elsevier B.V. All rights reserved.

Keywords
Soft X-ray, Spectrometer, Interferometer, RIXS, X-ray spectroscopy, Fourier transform spectrometer
National Category
Physical Sciences
Identifiers
urn:nbn:se:uu:diva-129133 (URN)10.1016/j.nima.2008.12.227 (DOI)000264918300020 ()
Available from: 2010-08-09 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved
Modin, A., Butorin, S. M., Vegelius, J., Olsson, A., Englund, C.-J. -., Andersson, J., . . . Burakov, B. E. (2008). Closed source experimental system for soft x-ray spectroscopy of radioactive materials. Review of Scientific Instruments, 79(9), 093103
Open this publication in new window or tab >>Closed source experimental system for soft x-ray spectroscopy of radioactive materials
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2008 (English)In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 79, no 9, p. 093103-Article in journal (Refereed) Published
Abstract [en]

An instrumental and experimental setup for soft x-ray spectroscopy meeting the requirements of a closed source for radioactivity is described. The system consists of a vacuum sealed cell containing the sample, mounted on a tubing system to ensure compatibility with most standard manipulators. The soft x rays penetrate a thin x-ray window separating the interior of the cell from the vacuum in the experimental chamber. Our first results for single crystal PuO2 confirm the feasibility of experiments using the setup. The results are consistent with results of first principles calculations and previously recorded spectra obtained using a standard open source setup. The results show that the closed source experimental system can be used to collect valuable experimental data from radioactive materials.

National Category
Physical Sciences
Identifiers
urn:nbn:se:uu:diva-107107 (URN)10.1063/1.2991109 (DOI)000260291800004 ()
Available from: 2009-07-16 Created: 2009-07-16 Last updated: 2017-12-13
Forsberg, J., Duda, L.-C., Olsson, A., Schmitt, T., Andersson, J., Nordgren, J., . . . Guo, J. (2007). System for in situ studies of atmospheric corrosion of metal films using soft x-ray spectroscopy and quartz crystal microbalance. Review of Scientific Instruments, 78(8), 083110
Open this publication in new window or tab >>System for in situ studies of atmospheric corrosion of metal films using soft x-ray spectroscopy and quartz crystal microbalance
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2007 (English)In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 78, no 8, p. 083110-Article in journal (Refereed) Published
Abstract [en]

We present a versatile chamber (“atmospheric corrosion cell”) for soft x-ray absorption/emission spectroscopy of metal surfaces in a corrosive atmosphere allowing novel in situ electronic structure studies. Synchrotron x rays passing through a thin window separating the corrosion cell interior from a beamline vacuum chamber probe a metal film deposited on a quartz crystal microbalance (QCM) or on the inside of the window. We present some initial results on chloride induced corrosion of iron surfaces in humidified synthetic air. By simultaneous recording of QCM signal and soft x-ray emission from the corroding sample, correlation between mass changes and variations in spectral features is facilitated.

 

National Category
Physical Sciences
Identifiers
urn:nbn:se:uu:diva-98008 (URN)10.1063/1.2777391 (DOI)000249156700011 ()
Available from: 2009-02-06 Created: 2009-02-06 Last updated: 2017-12-14
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