Topic
Scintillation
About: Scintillation is a research topic. Over the lifetime, 14022 publications have been published within this topic receiving 187694 citations.
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TL;DR: In this paper, the secondary scintillation yield in the electron avalanches of GEMs and THGEMs operating in gaseous xenon and argon has been determined for different gas pressures.
50 citations
TL;DR: Experimental results on real data show that this approach can considerably improve traditional methods, reaching a detection accuracy of 98%, very close to human-driven manual classification.
Abstract: This paper proposes a methodology for automatic, accurate, and early detection of amplitude ionospheric scintillation events, based on machine learning algorithms, applied on big sets of 50 Hz postcorrelation data provided by a global navigation satellite system receiver. Experimental results on real data show that this approach can considerably improve traditional methods, reaching a detection accuracy of 98%, very close to human-driven manual classification. Moreover, the detection responsiveness is enhanced, enabling early scintillation alerts.
50 citations
TL;DR: In this paper, the electron response curve of NaI:Tl was measured using highly monochromatic synchrotron irradiation ranging from 9-100 keV.
Abstract: Nonproportional response of the scintillation yield of NaI:Tl was measured using highly monochromatic synchrotron irradiation ranging from 9–100 keV. Special attention is paid to the x-ray escape peaks. They provide us additional information about photon response in the range 0.9–12 keV. A rapid variation in the photon response curve is observed near the iodine K-electron binding energy. A dense sampling of data is performed around this energy and that data are used to apply a method, which we call K-dip spectroscopy. This method allows us to derive the electron response curve of NaI:Tl down to energies as low as 30 eV. A comparison of our data with data of others employing different methods is made. Advantages, limitations, and peculiarities of presented techniques and methods are discussed.
50 citations
TL;DR: In this paper, the high-latitude transition or boundary between high and low amplitude fluctuations of satellite radio beacon signals has been examined as a function of time, and the boundary of the scintillation region reaches its lowest latitude (54° geomagnetic north) between 1930 and 2230 local time.
Abstract: The high-latitude transition or boundary between high and low amplitude fluctuations of satellite radio beacon signals has been examined as a function of time. The boundary of the scintillation region reaches its lowest latitude (54° geomagnetic north) between 1930 and 2230 local time. The most northerly boundary latitude of approximately 80° geomagnetic north occurs during the period of 1030–1330 local standard time. General agreement is demonstrated between the observations of Transit 4 at 54 MHz at a subauroral site, Explorer 22 at 40 MHz at three sites, and the main zone of discrete auroral events and precipitation of low-energy particles as shown by Piddington (1965) and Hartz and Brice (1967). High amplitude scintillations poleward of the auroral oval and soft electron precipitation in this latitude range show similar characteristics.
50 citations
50 citations