Magnetic structure Magnetic fields 18 Solar wind 16 Astrophysics 10 Flux ropes 10 Magnetic flux 10 Sun: magnetic fields 10 Boundary layer flow 8 Coronal mass ejection 8 In-situ observations 8 Interplanetary spacecraft 8 Magnetic clouds 8 Magnetic flux ropes 8 Magnetohydrodynamics 8 Solar energy 8 Sun 8 Sun: coronal mass ejections (CMEs) 8 Cylindrical symmetry 6 Magnetic configuration 6 Sun: coronal mass ejection 6 Activity cycles 4 Arbitrary cross section 4 Arrival time 4 Aspect ratio 4 Boundary pressure 4 Boundary shapes 4 Cylindrical flux ropes 4 Cylindrical models 4 Dynamical evolution 4 Electron beams 4