Magnetic Tilt Effect on Externally Driven Electromagnetic Ion Cyclotron (EMIC) Waves
- Princeton Plasma Physics Laboratory Princeton University Princeton NJ USA
- Andrews University Berrien Springs MI USA
Abstract We examine coupling of fluctuations in the solar wind with electromagnetic ion cyclotron (EMIC) waves in the magnetosphere using an advanced full‐wave simulation code, Petra‐M. Dipole tilt dramatically affects the coupling process. While very little wave power can reach the inner magnetosphere without tilt effects, a tilted dipole field dramatically increases the efficiency of the coupling process. Solar wind fluctuations incident at high magnetic latitude effectively reaches the ground along the field line and mode‐convert to linearly polarized field‐aligned propagating waves at the Alfvén and IIH resonances. Therefore, solar wind compressions efficiently drive linearly polarized EMIC waves when the dipole angle is tilted toward or away from the Sun‐Earth direction.
- Research Organization:
- Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR). Scientific Discovery through Advanced Computing (SciDAC); National Science Foundation (NSF); National Aeronautics and Space Administration (NASA)
- Grant/Contract Number:
- AC02‐09CH11466; AC02-09CH11466; AT1030200; AGS1602855; 80HQTR18T0066; 80HQTR19T0076; NNX17AI50G; NNX16AQ87G; 80NSSC19K0270; 80NSSC19K0843; 80NSSC18K0835; 80NSSC20K0355; 80NSSC20K0704; 80NSSC18K1578; 80NSSC21K1678; 80NSSC22K0515; AGS1832207; AGS2131013
- OSTI ID:
- 1961248
- Alternate ID(s):
- OSTI ID: 1957519; OSTI ID: 1983391
- Journal Information:
- Geophysical Research Letters, Journal Name: Geophysical Research Letters Vol. 50 Journal Issue: 6; ISSN 0094-8276
- Publisher:
- American Geophysical Union (AGU)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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