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  • 1.
    Kozyrev, A.
    et al.
    Space Research Institute of the Russian Academy of Sciences (IKI), Russia.
    Mitrofanov, I.
    Space Research Institute of the Russian Academy of Sciences (IKI), Russia.
    Owens, A.
    European Space Agency, The Netherlands.
    Quarati, F.
    AP, RST, FAME, Delft University of Technology, The Netherlands; Gonitec BV, The Netherlands .
    Benkhoff, J.
    European Space Agency, The Netherlands.
    Bakhtin, B.
    Space Research Institute of the Russian Academy of Sciences (IKI), Russia.
    Fedosov, F.
    Space Research Institute of the Russian Academy of Sciences (IKI), Russia.
    Golovin, D.
    Space Research Institute of the Russian Academy of Sciences (IKI), Russia.
    Litvak, M.
    Space Research Institute of the Russian Academy of Sciences (IKI), Russia.
    Malakhov, A.
    Space Research Institute of the Russian Academy of Sciences (IKI), Russia.
    Mokrousov, M.
    Space Research Institute of the Russian Academy of Sciences (IKI), Russia.
    Nuzhdin, I.
    Space Research Institute of the Russian Academy of Sciences (IKI), Russia.
    Sanin, A.
    Space Research Institute of the Russian Academy of Sciences (IKI), Russia.
    Tretyakov, V.
    Space Research Institute of the Russian Academy of Sciences (IKI), Russia.
    Vostrukhin, A.
    Space Research Institute of the Russian Academy of Sciences (IKI), Russia.
    Timoshenko, G.
    Joint Institute for Nuclear Research, Russia.
    Shvetsov, V.
    Joint Institute for Nuclear Research, Russia.
    Granja, C.
    Czech Technical University in Prague, Czech.
    Slavicek, Tomas
    Czech Technical University in Prague, Czech.
    Pospisil, S.
    Czech Technical University in Prague, Czech.
    A comparative study of LaBr3(Ce3+) and CeBr3 based gamma-ray spectrometers for planetary remote sensing applications2016In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 87, no 8Article in journal (Refereed)
    Abstract [en]

    The recent availability of large volume cerium bromide crystals raises the possibility of substantially improving gamma-ray spectrometer limiting flux sensitivities over current systems based on the lanthanum tri-halides, e.g., lanthanum bromide and lanthanum chloride, especially for remote sensing, low-level counting applications or any type of measurement characterized by poor signal to noise ratios. The Russian Space Research Institute has developed and manufactured a highly sensitive gamma-ray spectrometer for remote sensing observations of the planet Mercury from the Mercury Polar Orbiter (MPO), which forms part of ESA’s BepiColombo mission. The Flight Model (FM) gamma-ray spectrometer is based on a 3-in. single crystal of LaBr3(Ce3+) produced in a separate crystal development programme specifically for this mission. During the spectrometers development, manufacturing, and qualification phases, large crystals of CeBr3 became available in a subsequent phase of the same crystal development programme. Consequently, the Flight Spare Model (FSM) gamma-ray spectrometer was retrofitted with a 3-in. CeBr3 crystal and qualified for space. Except for the crystals, the two systems are essentially identical. In this paper, we report on a comparative assessment of the two systems, in terms of their respective spectral properties, as well as their suitability for use in planetary mission with respect to radiation tolerance and their propensity for activation. We also contrast their performance with a Ge detector representative of that flown on MESSENGER and show that: (a) both LaBr3(Ce3+) and CeBr3 provide superior detection systems over HPGe in the context of minimally resourced spacecraft and (b) CeBr3 is a more attractive system than LaBr3(Ce3+) in terms of sensitivities at lower gamma fluxes. Based on the tests, the FM has now been replaced by the FSM on the BepiColombo spacecraft. Thus, CeBr3 now forms the central gamma-ray detection element on the MPO spacecraft. Published by AIP Publishing.

  • 2. Rauer, R.
    et al.
    Neuber, G.
    Kunze, J.
    Bäckström, Joakim
    Rubhausen, M.
    Temperature-dependent spectral generalized magneto-optical ellipsometry for ferromagnetic compounds2005In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 76Article in journal (Refereed)
    Abstract [en]

    Spectral generalized magneto-optical ellipsometry is presented as an optical tool for the simultaneous measurement of the complex index of refraction n=n+ik, the complex magneto-optical coupling parameter Q=Q(r)+iQ(i) (i.e., the Voigt-parameter), and the orientation of the saturation magnetization M-s of isotropic ferromagnetic bulk materials. For wavelengths between 220 nm and 790 nm and at temperatures between 4.2 K and 800 K measurements on iron and permalloy demonstrate the comfortable application of this technique in order to resolve the spectral response of spin-polarized carriers and bands, which can provide valuable insight about the formation of the ferromagnetic state. (C) 2005 American Institute of Physics.

  • 3. Schulz, B.
    et al.
    Bäckström, Joakim
    Budelmann, D.
    Maeser, R.
    Rubhausen, M.
    Klein, M. V.
    Schoeffel, E.
    Mihill, A.
    Yoon, S.
    Fully reflective deep ultraviolet to near infrared spectrometer and entrance optics for resonance Raman spectroscopy2005In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 76Article in journal (Refereed)
    Abstract [en]

    We present the design and performance of a new triple-grating deep ultraviolet to near-infrared spectrometer. The system is fully achromatic due to the use of reflective optics. The minimization of image aberrations by using on- and off- axis parabolic mirrors as well as elliptical mirrors yields a strong stray light rejection with high resolution over a wavelength range between 165 and 1000 nm. The Raman signal is collected with a reflective entrance objective with a numerical aperture of 0.5, featuring a Cassegrain-type design. Resonance Raman studies on semiconductors and on correlated compounds, such as LaMnO3, highlight the performance of this instrument, and show diverse resonance effects between 1.96 and 5.4 eV. (c) 2005 American Institute of Physics.

  • 4.
    Singh, S.
    et al.
    Institute of Physics of the ASCR, ELI-Beamlines, Czech Republic.
    Slavicek, Tomas
    Czech Technical University in Prague, Prague, Czech Republic.
    Hodak, R.
    Czech Technical University in Prague, Prague, Czech Republic.
    Versaci, R.
    Institute of Physics of the ASCR, ELI-Beamlines, Czech Republic.
    Pridal, P.
    Czech Technical University in Prague, Prague, Czech Republic.
    Kumar, D.
    Institute of Physics of the ASCR, ELI-Beamlines, Czech Republic.
    Absolute calibration of imaging plate detectors for electron kinetic energies between 150 keV and 1.75 MeV2017In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 88, no 7Article in journal (Refereed)
    Abstract [en]

    This paper presents the calibration of two different kinds of image plates (IPs) for detecting electrons with kinetic energy in the range of 150 keV-1.75 MeV. The calibration was performed using a Sr-90 beta source. The paper also provides the measured fading response for the IPs in the time range from 12 min to 18 h. Calibration results are compared to Monte Carlo simulations of energy deposited by the electrons in the sensitive layer of the IPs. It was found that within this energy range a linear relation between simulated energy deposited by the electron in the phosphor layer and the measured photo stimulated luminescence in the IP is adequate to model the response of the IP. 

  • 5. Örtegren, Jonas
    et al.
    Wantke, Klaus-Dieter
    Motschmann, Hubert
    An oscillating bubble device for direct measurement of molecular exchange processes at the air-liquid interface in the medium frequency range2003In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 74, no 12, p. 5167-5172Article in journal (Refereed)
    Abstract [en]

    An experiment for the investigation of the exchange dynamics of adsorbed and dissolved surfactantsat the air–water interface is described. The experiment combines two established techniques: themethod of the oscillating bubble generates in a well-defined fashion a nonequilibrium state by aperiodic compression and expansion of the surface layer. The state of the adsorption layer is theninvestigated by surface second harmonic generation ~SHG!. SHG is a second order nonlinear opticaltechnique, which probes only the adsorbed molecules. Contribution of the bulk is widely suppressedand information on the orientational order of the surfactant and the corresponding number densityof the adsorbed species are gained. These data are of utmost importance to assess the establishedmodels of Gibbs adsorption layer. The combination of the nonlinear optical technique with a rapidlyoscillating bubble imposes severe experimental hurdles such as the synchronization of the laserpulses with the state of the bubble or problems arising from a bad signal to noise ratio. Theexperimental setup discussed in this article overcomes these problems and outlines all relevantdesign parameters.

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