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Photolysis of water-soluble components inside cloud droplets by ultraviolet/visible radiation may play an important role in atmospheric chemistry. Two earlier studies have suggested that the actinic flux and hence the photolysis frequency within spherical droplets is enhanced relative to that in the surrounding air, but have given different values for this(More)
In this study we examine the performance of 31 global model radiative transfer schemes in cloudfree conditions with prescribed gaseous absorbers and no aerosols (Rayleigh atmosphere), with prescribed scatteringonly aerosols, and with more absorbing aerosols. Results are compared to benchmark results from high-resolution, multiangular line-by-line radiation(More)
We have reproducibly fabricated YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// (YBCO) grain boundary Josephson junctions (GBJs) on SrTiO/sub 3/ and MgO bicrystals as well as by introducing buffer layers between the c-axis oriented YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// film and the SrTiO/sub 3/ bicrystal substrate. For the additional layers non-superconducting(More)
Three-terminal electronic devices based on flux-flow phenomena have attracted considerable interest due to their potential application in the interface between superconducting and semiconducting electronics. We have fabricated Josephson vortex flow transistors based on parallel arrays of YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// (YBCO) bicrystal Grain(More)
Grain boundaries are extensively used as high-quality Josephson junctions in high-Tc superconductors. Their superconducting characteristics can generally be well described by conventional models of strongly coupled Josephson junctions. Here, we report on highly anomalous critical current vs. magnetic field dependencies of grain boundaries in YBa2Cu307-,.(More)
We have studied the spatial homogeneity of the critical current density J/sub c/ and static magnetic flux states in YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// bicrystal grain boundary Josephson junctions (GBJs) using Low Temperature Scanning Electron Microscopy (LTSEM). By LTSEM the J/sub c/ distribution and the static magnetic flux states in the GBJs could be(More)
Low-temperature scanning electron microscopy was used to investigate the interaction of fluxons (Josephson vortices) with a superconducting (Abrikosov) vortex trapped in one of the electrodes of a long quasi-one-dimensional Josephson junction. The Abrikosov vortex penetrated a top superconducting film and spread out in the tunnel barrier area between the(More)