miun.sePublications
Change search
Refine search result
1 - 10 of 10
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 1.
    Albani, Giorgia
    et al.
    Dipartimento di Fisica, Universitá degli Studi di Milano-Bicocca, Piazza della Scienza 3, Milano, Italy; INFN Sezione di Milano-Bicocca, Piazza della Scienza 3, Milano, Italy.
    Perelli Cippo, Enrico
    Istituto di Fisica Del Plasma (IFP-CNR), Via Cozzi 53, Milano, Italy.
    Croci, Gabriele
    Dipartimento di Fisica, Universitá degli Studi di Milano-Bicocca, Piazza della Scienza 3, Milano, Italy; INFN Sezione di Milano-Bicocca, Piazza della Scienza 3, Milano, Italy.
    Muraro, Andrea
    Istituto di Fisica Del Plasma (IFP-CNR), Via Cozzi 53, Milano, Italy.
    Schooneveld, Erik
    STFC-ISIS Facility, RAL, Didcot, United Kingdom.
    Scherillo, Antonella
    STFC-ISIS Facility, RAL, Didcot, United Kingdom.
    Hall-Wilton, Richard J.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design. European Spallation Source ERIC, Lund.
    Kanaki, Kalliopi
    European Spallation Source ERIC, Lund.
    Höglund, Carina
    European Spallation Source ERIC, Lund; Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping.
    Hultman, Lars
    Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping.
    Birch, Jens
    Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping.
    Claps, Gerardo
    INFN, Laboratori Nazionali di Frascati, Via Fermi 40, Frascati, Italy.
    Murtas, Fabrizio
    INFN, Laboratori Nazionali di Frascati, Via Fermi 40, Frascati, Italy.
    Rebai, Marica
    Dipartimento di Fisica, Universitá degli Studi di Milano-Bicocca, Piazza della Scienza 3, Milano, Italy; INFN Sezione di Milano-Bicocca, Piazza della Scienza 3, Milano, Italy.
    Tardocchi, Marco
    Istituto di Fisica Del Plasma (IFP-CNR), Via Cozzi 53, Milano, Italy.
    Gorini, Giuseppe
    Dipartimento di Fisica, Universitá degli Studi di Milano-Bicocca, Piazza della Scienza 3, Milano, Italy; INFN Sezione di Milano-Bicocca, Piazza della Scienza 3, Milano, Italy; Istituto di Fisica Del Plasma (IFP-CNR), Via Cozzi 53, Milano, Italy.
    Evolution in boron-based GEM detectors for diffraction measurements: From planar to 3D converters2016In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 27, no 11, article id 115902Article in journal (Refereed)
    Abstract [en]

    The so-called '3He-crisis' has motivated the neutron detector community to undertake an intense R&D programme in order to develop technologies alternative to standard 3He tubes and suitable for neutron detection systems in future spallation sources such as the European spallation source (ESS). Boron-based GEM (gas electron multiplier) detectors are a promising '3He-free' technology for thermal neutron detection in neutron scattering experiments. In this paper the evolution of boron-based GEM detectors from planar to 3D converters with an application in diffraction measurements is presented. The use of 3D converters coupled with GEMs allows for an optimization of the detector performances. Three different detectors were used for diffraction measurements on the INES instrument at the ISIS spallation source. The performances of the GEM-detectors are compared with those of conventional 3He tubes installed on the INES instrument. The conceptual detector with the 3D converter used in this paper reached a count rate per unit area of about 25% relative to the currently installed 3He tube. Its timing resolution is similar and the signal-to-background ratio (S/B) is 2 times lower.

  • 2.
    Andersson, Henrik
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Manuilskiy, Anatoliy
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Thungström, Göran
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Nilsson, Hans-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Evaluation of an Integrated Fourier-Transform Spectrometer Utilizing a Lateral Effect Position Sensitive Detector with a Multi-Channel Fabry-Perot Interferometer2008In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 19, no 4, p. 045306-Article in journal (Refereed)
    Abstract [en]

    The basis of this paper is the evaluation of an integrated multi-channel Fourier-transform (FT) spectrometer based on a multi-channel wedge Fabry-Perot interferometer and a one-dimensional lateral effect position sensitive detector (PSD). The use of a PSD for an interferogram readout allows for a simple scanning mechanism with no requirement for any position reference. The use of a wedge-shaped interferometer makes it possible to integrate it directly onto the PSD surface, thus producing a very compact spectrometer. The capabilities of the spectrometer are demonstrated by absorption spectral measurements using a reference sample. In addition, spectral measurements on 532 nm DPSS and 632.8 nm He-Ne lasers are presented. The resolution of the spectrometer is approximately 5 nm. The evaluated spectrometer set-up can be used in applications where compact and low cost spectrometers are required, such as in process control and in education. Further, it is shown that there are deteriorations in very high accuracy position measurements, which are caused by changes in incident light intensity. A model describing the above-mentioned nonlinearities was developed based on analysing the equivalent circuit for PSDs and parameters such as leakage current and serial resistance. Additionally, a method is proposed to assist in the reduction of the nonlinearity caused by this effect.

  • 3.
    Koptyug, Andrey
    et al.
    Inst. of Chem. Kinetics & Combustion, Acad. of Sci., Novosibirsk, Russia.
    Grishin, Yurij
    S-band magnetron-based accessory for optical detection of ESR spectra of radiation-induced radical-ion pairs1994In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 5, no 4, p. 363-370Article in journal (Refereed)
    Abstract [en]

    In the development of the technique of reaction yield detected magnetic resonance (RYDMR), a novel simple accessory for optical detection of ESR (OD ESR), based on the S-band continuous wave magnetron generator is presented. Basic technical requirements for the RYDMR accessories are discussed. The successful use of an S-band magnetron as a microwave source for RYDMR experiments is reported for the first time. Along with the use of a simple loop-gap resonator it permits the studies of both polar and non-polar samples with good sensitivity and field resolution. With the help of this accessory, OD ESR spectra of some new acceptors, acridin and fluorescein, were detected and some new solvents, poly(ethylene glycol) and paraffin-based high-voltage insulator oil, were successfully utilized.

  • 4. Koptyug, Andrey
    et al.
    Sörman, E.
    A Method of Altering the Modulation Type and frequency of Commercial ESR Spectrometers:  1994In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 5, no 7, p. 797-780Article in journal (Refereed)
    Abstract [en]

    A strategy of altering the modulation type and frequency of commercial continuous wave ESR spectrometers without changes in the main console is discussed. A simple converter unit, permitting the use of various external receivers, widening the possibilities for the basic commercial set-up is suggested. Block diagrams for altering the modulation frequency and type are presented and the use of boxcar averaging systems for the time-resolved experiments is discussed in detail. As an example of a successful application of this method, some results obtained with two different RYDMR accessories, based on the commercial CW ESR spectrometers, are discussed. X-band OD ESR studies of hydrocarbon solutions are illustrated by the spectra of p-xylene and trans-phenyl-propene radical cations, and methyl acrylate and trans-azabenzene radical ions, detected in situ under X-irradiation. Semiconductor studies are illustrated by CW and time-resolved X-band ODMR spectra of PGa-P3Y point defects as well as its OD ENDOR and ENDOR-induced ODMR spectra

  • 5.
    Mattsson, Claes
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Thungström, Göran
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Bertilsson, Kent
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Nilsson, Hans-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Martin, Hans
    SenseAir.
    Fabrication and characterization of a design optimized SU-8 thermopile with enhanced sensitivity2009In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 20, no 11, p. 115202-Article in journal (Refereed)
    Abstract [en]

    In the infrared wavelength region, thermopiles are an important type of detectors. A major advantage of thermopiles is their non-cooling requirement. Depending on the applied absorption layer, their responsivity is often rather flat within a large wavelength region. This work presents the fabrication and characterization of a sensitivity and design optimized thermopile detector with a 4 µm self-supported SiO2/SU-8 membrane. The structure consists of 240 series interconnected thermocouple junctions obtained by a metal evaporation and lift-off. Two metal combinations have been evaluated, namely, nickel/titanium and aluminium/bismuth. Series resistances of 76 k and 283 k were measured for the Ni/Ti thermopile and the Al/Bi thermopile respectively. For the Al/Bi thermopile a responsivity of 60 V/W was achieved using a 1.56 µm fibre coupled diode laser with a power of 3.5 mW. Using a white light source with a radiation flux of 0.45 W/mm2 a voltage response of 68 V mm2/W was measured for the Al/Bi thermopile. The time constant of the characterized detectors was calculated as being 70 ms, using the pulsed IR laser.

  • 6.
    Moilanen, C. S.
    et al.
    Department of Mechanical Engineering and Industrial Systems, Tampere University of Technology, PO Box 589, Tampere, Finland.
    Saarenrinne, P.
    Department of Mechanical Engineering and Industrial Systems, Tampere University of Technology, PO Box 589, Tampere, Finland.
    Engberg, Birgitta A.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.
    Björkqvist, T.
    Department of Automation Science and Engineering, Tampere University of Technology, PO Box 692, Tampere, Finland .
    Image-based stress and strain measurement of wood in the split-Hopkinson pressure bar2015In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 26, no 8, article id 085206Article in journal (Refereed)
    Abstract [en]

    The properties of wood must be considered when designing mechanical pulping machinery. The composition of wood within the annual ring is important. This paper proposes a novel image-based method to measure stress and planar strain distribution in soft, heterogeneous materials. The main advantage of this method in comparison to traditional methods that are based on strain gauges is that it captures local strain gradients and not only average strains. Wood samples were subjected to compression at strain rates of 1000-2500 s-1 in an encapsulated split-Hopkinson device. High-speed photography captured images at 50 000-100 000 Hz and different magnifications to achieve spatial resolutions of 2.9 to 9.7 μm pixels-1. The image-based analysis utilized an image correlation technique with a method that was developed for particle image velocimetry. The image analysis gave local strain distribution and average stress as a function of time. Two stress approximations, using the material properties of the split-Hopkinson bars and the displacement of the transmitter bar/sample interface, are presented. Strain gauges on the bars of the split-Hopkinson device give the reference average stress and strain. The most accurate image-based stress approximation differed from the strain gauge result by 5%. © 2015 IOP Publishing Ltd.

  • 7.
    Norman, Peter
    et al.
    Luleå University of Technology, Department of Applied Physics and Mechanical Engineering.
    Bäckström, Mikael
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Rantatalo, Mattis
    Luleå University of Technology.
    Svoboda, Ales
    Luleå University of Technology, Department of Applied Physics and Mechanical Engineering.
    Kaplan, Alexander
    Luleå University of Technology, Department of Applied Physics and Mechanical Engineering.
    A sophisticated platform for characterization, monitoring and control of machining2006In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 17, no 4, p. 847-854Article in journal (Refereed)
    Abstract [en]

    The potential for improving the performance of machine tools is considerable. However, for this to be achieved without tool failure or product damage, the process must be sufficiently well understood to enable real-time monitoring and control to be applied. A unique sophisticated measurement platform has been developed and applied to two different machining centres, particularly for high-speed machining up to 24 000 rpm. Characterization and on-line monitoring of the dynamic behaviour of the machining processes has been carried out using both contact-based methods (accelerometer, force sensor) and non-contact methods (laser Doppler vibrometry and magnetic shaker) and numerical simulation (finite element based modal analysis). The platform was applied both pre-process and on-line for studying an aluminium testpiece based on a thin-walled aerospace component. Stability lobe diagrams for this specific machine/component combination were generated allowing selection of optimal process parameters giving stable cutting and metal removal rates some 8-10 times higher than those possible in unstable machining. Based on dynamic characterization and monitoring, a concept for an adaptive control with constraints based machine tool controller has been developed. The developed platform can be applied in manifold machining situations. It offers a reliable way of achieving significant process improvement.

  • 8.
    Olin, Håkan
    Dept. of Phys., Chalmers Univ. of Technol., Goteborg, Sweden.
    Design of a scanning probe microscope1994In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 5, p. 976-984Article in journal (Refereed)
    Abstract [en]

    A compact scanning probe microscope for operation in air and liquid is described. The probe techniques implemented are scanning tunnelling microscopy and scanning ion conductance microscopy. The software, electronics, mechanical construction and some representative measurements are presented. The compact and concentric microscope head is built around a commercial piezoelectric inchworm motor. The scanner is a standard piezo tube. An analogue feedback system is used for taking images, while digital control of the probe-sample distance is used for other experiments, such as measurements of current-voltage characteristics. A Macintosh personal computer is used for control and presentation of data. A simple method to make scanning tunnelling microscope tips suitable for electrochemical use is described. The microscope has a high resonance frequency (9.6 kHz), low noise (0.01 nm Hz- 12 / at 10 Hz), low thermal drift (less than 0.1 nm min-1), and high acoustical noise suppression. The current-distance-dependency of the scanning ion conductance microscope was found to be linear.

     

  • 9. Svensson, K
    et al.
    Althoff, F
    Olin, Håkan
    Department of Physics, Chalmers University of Technology.
    A compact inertial slider STM1997In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 8, no 11, p. 1360-1362Article in journal (Refereed)
    Abstract [en]

    A compact, less than , scanning tunnelling microscope (STM) based on a new inertial slider design is presented. The STM is built of two concentric piezoelectric tubes, the inner one for scanning the tip and the outer one for inertial sliding of the sample to and from the tip. The coarse approach is made by inertial sliding of the sample along a plane that is non-perpendicular to the tip, while the sample surface is kept perpendicular to the tip throughout inertial sliding and image acquisitions. The compact design ensures a mechanical noise level of less than 0.1 Å.

     

  • 10.
    Vitucci, G.
    et al.
    Univ Milano Bicocca, Milan, Italy.
    Minniti, T.
    STFC Rutherford Appleton Lab, Berks, England.
    Angella, G.
    IENI CNR, Milan, Italy.
    Croci, G.
    Univ Milano Bicocca, Milan, Italy.
    Muraro, A.
    Univ Milano Bicocca, Milan, Italy.
    Hoglund, C.
    Linköping Univ, Linköping; European Spallat Source ERIC, Lund.
    Lai, C. C.
    European Spallat Source ERIC, Lund.
    Cippo, E. Perelli
    IFP CNR, Milan, Italy.
    Albani, G.
    Univ Milano Bicocca, Milan, Italy.
    Hall-Wilton, Richard
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design. European Spallat Source ERIC, Lund.
    Robinson, Linda
    European Spallat Source ERIC, Lund.
    Grosso, G.
    IFP CNR, Milan, Italy.
    Tardocchi, M.
    IFP CNR, Milan, Italy.
    Gorini, G.
    Univ Milano Bicocca, Milan, Italy.
    Measurement of the thickness of B4C layers deposited over metallic grids via multi-angle neutron radiography2019In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 30, no 1, article id 015402Article in journal (Refereed)
    Abstract [en]

    At the present time, different kinds of thermal neutron detectors are under development at the European Spallation Source research facility, in order to overcome the well-known problem of the He-3 shortage. One of these new systems relies on the use of a 3D neutron convener cathode that consists of a stack of aluminum grids, covered by a 0.9 mu m B-10 enriched boron carbide layer ((B4C)-B-10). As the conversion efficiency is a function of the boron thickness and the mean free path of the charged particles produced in the neutron induced reaction, the characterization of the boron carbide layer uniformity over the grids becomes crucial. In this work, a non-destructive method to map the thickness distribution of the converter layer over the grids is shown. The measurements exploit the white-beam neutron radiography technique where the specimen is irradiated at different angles. This experiment has been performed at the IMAT beamline operating at the ISIS spallation neutron source (UK). The results confirm that this non-destructive, wide-ranging technique allows a reliable and fast sample characterization and that it may be exploited in similar analyses where equivalent requirements are requested.

1 - 10 of 10
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf