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2505. Characterization of the Magnetic Anisotropy of Hard Magnetic Nanoparticles by Singular Point Detection TechniqueC. De Julian Fernandez, D. Mishra, R. Cabassi, F. Bolzoni, M. Petrecca, M. Albino, M Saura-Muzquiz, Petra Jenuš, A. Quesada, M Christensen, T Schliesch, B Belec, C Sangregorio, F Albertini, 2020, objavljeni povzetek znanstvenega prispevka na konferenci Ključne besede: nanomagnetism
Objavljeno v RUNG: 15.09.2020; Ogledov: 2614; Prenosov: 0
Gradivo ima več datotek! Več... |
2506. Performance of microAethalometers: Real-world Field Intercomparisons from Multiple Mobile Measurement Campaigns in Different Atmospheric EnvironmentsHoney Alas, Thomas Mueller, Kay Weinhold, Sascha Pfeifer, Kristina Glojek, Asta Gregorič, Griša Močnik, Luka Drinovec, Francesca Costabile, Martina Ristorini, A. Wiedensohler, 2020, izvirni znanstveni članek Opis: Small aethalometers are frequently used to measure equivalent black carbon (eBC) mass concentrations in the context of personal exposure and air pollution mapping through mobile measurements (MM). The most widely used is the microAethalometer (AE51). Its performance in the laboratory and field is well documented, however, there is not sufficient data in the context of its performance in different environments. In this investigation, we present the characterization of the performance of the AE51 through field unit-to-unit intercomparisons (IC), and against a reference absorption photometer from three MM campaigns conducted in drastically different environments. Five IC parameters were considered: i) study area, ii) location of IC, iii) time of day, iv) duration of IC, and v) correction for the filter-loading effect. We can conclude that it is crucial where and how long the IC have been performed in terms of the correlation between the mobile and reference instruments. Better correlations (R2 > 0.8, slope = 0.8) are achieved for IC performed in rural, and background areas for more than 10 minutes. In locations with more homogenous atmosphere, the correction of the loading effect improved the correlation between the mobile and reference instruments. In addition, a newer microAethalometer model (MA200) was characterized in the field under extreme cold conditions and correlated against another MA200 (R2 > 0.8, slope ≈ 1.0), AE51(R2 > 0.9, slope ≈ 0.9), and a stationary Aethalometer (AE33) across all wavelengths (R2 > 0.8, slope ≈ 0.7). For MA200, the loading effect was more pronounced, especially at the lower wavelengths, hence the correction of the loading effect is essential to improve the correlation against the AE33. The MA200 and AE51 proved to be robust and dependable portable instruments for MM applications. Real-world quality assurance of these instruments should be performed through field IC against reference instruments with longer durations in areas of slowly changing eBC concentration.
Ključne besede: Portable instruments, Mobile monitoring, Black carbon, Instrument intercomparisons
Objavljeno v RUNG: 15.09.2020; Ogledov: 2684; Prenosov: 184
 Celotno besedilo (3,54 MB) |
2507. Photo-thermal interferometerLuka Drinovec, Griša Močnik, 2020, patent Opis: A photo-thermal interferometer for measuring the light absorption of an aerosol or gas comprises a first laser source emitting a laser beam and a beam splitter adapted to divide the laser beam into a probe beam and a reference beam. The interferometer further comprises first optical elements which are adapted to direct the probe beam such that it passes through the aerosol and interferes with the reference beam thereafter thereby causing interference patterns. A detector detects the interference patterns. The interferometer further comprises a second laser source configured to emit a pump beam for transferring energy to the aerosol. Second optical elements are adapted to direct the pump beam such that it overlaps with the probe beam at least partially in the aerosol or gas. At least one of the second optical elements modifying the pump beam is an axicon.
Ključne besede: aerosol, absorption, black carbon
Objavljeno v RUNG: 15.09.2020; Ogledov: 2960; Prenosov: 0
Gradivo ima več datotek! Več... |
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2510. Studies on the response of a water-Cherenkov detector of the Pierre Auger Observatory to atmospheric muons using an RPC hodoscopeA. Aab, Andrej Filipčič, Gašper Kukec Mezek, Samo Stanič, Marta Trini, Serguei Vorobiov, Danilo Zavrtanik, Marko Zavrtanik, Lukas Zehrer, 2020, izvirni znanstveni članek Ključne besede: ultra-high energy cosmic rays, extensive air showers, Pierre Auger Observatory, water Cherenkov detectors, detector calibration, hodoscope-based calibration
Objavljeno v RUNG: 11.09.2020; Ogledov: 3188; Prenosov: 108
Celotno besedilo (1,39 MB) |
