Evidence for the production of Ar2∗−_2^{*-} metastable negative molecular ions in two-phase argon detectors for dark matter searches

The recent studies of electroluminescence (EL) properties in two-phase argon detectors for dark matter searches have revealed the presence of unusual delayed pulses in the EL signal in the form of two slow components with time constants of about 5 and 50 $\mu$s. These components were shown to be present in the charge signal itself, which clearly indicates that drifting electrons are temporarily trapped on two states of metastable negative argon ions which have never been observed before. In this work, using the pressure dependence of the ratio of slow component contributions measured in experiment, it is shown that these states are those of two types of metastable negative molecular ions, $\mathrm{Ar}_2^{*-}(b \ ^4\Sigma_u^-)$ and $\mathrm{Ar}_2^{*-}(a \ ^4\Sigma_g^+)$ for the higher and lower energy level respectively.Comment: 4 pages, 2 figure

Possible use of television broadcasting signals for wind meas- urements by the meteor radiolocation method -main theoretical as- pects and results of first experiments

Summary The possibility of using terrestrial television (TV) broadcast signals (TVBS) as sounding signals for mesosphere-lower thermosphere (MLT) wind measurements by the radio meteor method is investigated. Such approach allows to use external TV transmitters as sounding signal sources and consequently to reduce costs of measurements. It is shown that meteor trails in the area above the receiver should be selected to eliminate MLT wind measurement ambiguity. Results of experimental observations are presented. Validation of the results has been performed using datasets from the Thermosphere-IonosphereMesosphere Energetics and Dynamics (TIMED) satellite and a SKiYMET meteor radar (Collm Observatory, Germany). It is shown that the obtained experimental results and TIMED mean winds are correlated with a correlation coefficient of 0.58 (significance level 0.95 according to a t-test). The measurements show for the first time that terrestrial television broadcast signals can be used for MLT wind measurements and that the developed technique may be used for MLT wind monitoring on the base of the existing terrestrial TV broadcasting network. Zusammenfassung Es wird untersucht, inwieweit terrestrischer Fernsehsignale zur Sondierung des Windes in der Mesosphäre und unteren Thermosphäre genutzt werden können. Ein solcher Ansatz erlaubt es, externe Sender als Quelle zu verwenden und damit Kosten zu sparen. Es wird gezeigt, dass Meteorsignale im Raum über dem Empfänger genutzt werden können, welches die Uneindeutigkeit der Windsignale verringert. Ergebnisse eines Experiments werden gezeigt und anhand von TIMED-Satellitendaten und VHF-Radarmessungen validiert. Die Messungen zeigen zum ersten Mal die Möglichkeit einer Windmessung in der unteren Thermosphäre auf der Basis terrestrischer Fernsehsignale

Poder do Estado na sociedade moderna: os problemas de compreensão e investigação

The article analyzes the problems associated with the understanding of state power, as well as theoretical and methodological innovations and research tools used in the study of this political and legal phenomenon. The authors analyze various directions of the legal, political and sociocultural definition of state power, identify and discuss various dimensions and levels in the conceptualization of the latter. In the context of the paper, the government is as a complex political and legal phenomenon, considered as a specific type of general system of public authority, which is implemented by various political subjects, which have a rigid link to the socio-cultural and territorial space.El artículo analiza los problemas asociados con la comprensión del poder estatal, así como las innovaciones teóricas y metodológicas y las herramientas de investigación utilizadas en el estudio de este fenómeno político y legal. Los autores analizan varias direcciones de la definición legal, política y sociocultural del poder estatal, identifican y discuten varias dimensiones y niveles en la conceptualización de este último. En el contexto del documento, el gobierno es como un fenómeno político y legal complejo, considerado como un tipo específico de sistema general de autoridad pública, que es implementado por varios sujetos políticos, que tienen un vínculo rígido con el contexto sociocultural y territorial. espacio.O artigo analisa os problemas associados à compreensão do poder do Estado, bem como as inovações teóricas e metodológicas e ferramentas de pesquisa utilizadas no estudo desse fenômeno político e jurídico. Os autores analisam várias direções da definição jurídica, política e sociocultural do poder do Estado, identificam e discutem várias dimensões e níveis na conceituação do último. No contexto do trabalho, o governo é um fenômeno político e jurídico complexo, considerado como um tipo específico de sistema geral de autoridade pública, que é implementado por vários sujeitos políticos, que têm um vínculo rígido com as relações socioculturais e territoriais. espaço