Cold Ionospheric Ions in the Magnetosphere
نویسندگان
چکیده
Cold (eV) ions of ionospheric origin are a major source magnetospheric plasma. These dominate the number density for most volume magnetosphere, time. This affects large-scale physics, including plasma temperature and pressure (and thus instability thresholds) Alfvén velocity energy transport with waves magnetic reconnection rate). also small-scale kinetic wave generation Hall physics reconnection. Ions escaping from ionosphere represent significant fraction mass outflow planet Earth.
منابع مشابه
Magnetosphere sawtooth oscillations induced by ionospheric outflow.
The sawtooth mode of convection of Earth's magnetosphere is a 2- to 4-hour planetary-scale oscillation powered by the solar wind-magnetosphere-ionosphere (SW-M-I) interaction. Using global simulations of geospace, we have shown that ionospheric O(+) outflows can generate sawtooth oscillations. As the outflowing ions fill the inner magnetosphere, their pressure distends the nightside magnetic fi...
متن کاملCold Ions in Space
— Accurate optical frequency standards employ single trapped and laser cooled ions, we review recent experiments. Optical frequencies can be measured with fractional uncertainties of only a few parts in 10 demonstrating the most accurate clocks available today. Demonstrated quantum information techniques help to further improve on determining residual systematic errors. Additionally, entangleme...
متن کاملSAMPEX Measurements of Heavy Ions Trapped in the Magnetosphere
New observations of >15 MeV/nuc trapped heavy ions with Z 2 2 have been made by the SAMPEX spacecraft in low polar orbit. The composition of these ions, which are located primarily around L = 2, is dominated by He, N, 0, and Ne. The N, 0, and Ne ions are apparently trapped "anomalous cosmic rays," while the origin of the trapped He flux is presently uncertain. These ions can affect the rate of ...
متن کاملIonospheric origin of magnetospheric O+ ions
Flows of thermal atomic oxygen (0 +) ions are deduced from topside ionospheric plasma density profiles. The mean flux within most of the polar cap is of the order of lO 12 m -2 s-l, a figure which is consistent with both theoretical and experimental estimates of the light ion at . polar wind eater altitudes Larger flows (up to 6 x lOl•m-2s-1) are observed n ar the poleward edge of the night-sid...
متن کاملThe influence of anisotropic F region ion velocity distributions on ionospheric ion outflows into the magnetosphere
The contribution to the fieldionospheric F region and sources of the heavy ions aligned ionospheric ion momentum equation, due to which are accelerated to several electron volts at coupling between pressure anisotropy and the greater altitudes and subsequently flow from the inhomogeneous geomagnetic field, is investigated. ionosphere into the magnetosphere. In order to We term this contribution...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Geophysical monograph
سال: 2021
ISSN: ['0065-8448', '2328-8779']
DOI: https://doi.org/10.1002/9781119815624.ch15