553 research outputs found
Observation of pick-up ions in the solar wind: Evidence for the source of the anomalous cosmic ray component?
Singly ionized energetic helium has been observed in the solar wind by using the time of flight spectrometer SULEICA on the AMPTE/IRM satellite between September and December, 1984. The energy density spectrum shows a sharp cut off which is strongly correlated with the four fold solar wind bulk energy. The absolute flux of the He(+)ions of about 10000 ion/sq cm.s is present independent of the IPL magnetic field orientation. The most likely source is the neutral helium of the interstellar wind which is ionized by solar UV radiation. It is suggested that these particles represent the source of the anomalous cosmic ray component
Structure and lateral electron hopping in Osmium-tris-4,7-diphenylphenanthrolin perchlorate monolayers at the air/water interface.
Determining the ionization rates of interstellar neutral species using direct-sampling observations of their direct and indirect beams
A good understanding of the ionization rates of neutral species in the
heliosphere is important for studies of the heliosphere and planetary
atmospheres. So far, the intensities of the ionization reactions have been
studied based on observations of the contributing phenomena, such as the solar
spectral flux in the EUV band and the flux of the solar wind protons, alpha
particles, and electrons. The results strongly depend on absolute calibration
of these measurements, which, especially for the EUV measurements, is
challenging. Here, we propose a novel method of determining the ionization rate
of neutral species based on direct sampling of interstellar neutral gas from
two locations in space distant to each other. In particular, we suggest
performing observations from the vicinity of Earth's orbit and using ratios of
fluxes of ISN He for the direct and indirect orbits of interstellar atoms. We
identify the most favorable conditions and observations geometries, suitable
for implementation on the forthcoming NASA mission Interstellar Mapping and
Acceleration Probe.Comment: Accepted for ApJ
Reversible trilayer formation in the air-water interface from a mixed monolayer containing a cationic lipid and an anionic porphyrin
Particle acceleration and transport in the tail and at the front side of the magnetosphere, task 1 and 2
The work under this grant involved studies of: (1) the acceleration and heating of ions in the course of magnetospheric substorms and the spatial distributions of the ion populations in the magnetotail; and (2) the comparison in in-situ acceleration at the bow shock and the leakage of energetic particles from the magnetosphere as source of energetic ions upstream of the Earth's bow shock
Use of UV-vis Reflection Spectroscopy for Determining the Organization of Viologen and Viologen Tetracyanoquinodimethanide Monolayers.
Use of UV-vis Reflection Spectroscopy for Determining the Organization of Viologen and Viologen Tetracyanoquinodimethanide Monolayers.
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