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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Magnetospheric Multiscale Observations of ULF Waves and Correlated Low-Energy Ion Monoenergetic Acceleration
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Magnetospheric Multiscale Observations of ULF Waves and Correlated Low-Energy Ion Monoenergetic Acceleration

机译:ULF磁性层的多尺度观测低能离子单色的海浪和相关加速度

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Low-energy ions of ionospheric origin with energies below 10s of electron volt dominate most of the volume and mass of the terrestrial magnetosphere. However, sunlit spacecraft often become positively charged to several 10s of volts, which prevents low-energy ions from reaching the particle detectors on the spacecraft. Magnetospheric Multiscale spacecraft (MMS) observations show that ultralow-frequency (ULF) waves drive low-energy ions to drift in the E × B direction with a drift velocity equal to V_(E × B), and low-energy ions were accelerated to sufficient total energy to be measured by the MMS/Fast Plasma Investigation Dual Ion Spectrometers. The maximum low-energy ion energy flux peak seen in MMS1's dual ion spectrometer measurements agreed well with the theoretical calculation of H~+ ion E × B drift energy. The density of ions in the energy range below minimum energy threshold was between 1 and 3 cm~(-3) in the magnetosphere subsolar region in this event.
机译:低能离子的电离层起源电子伏特占据了大部分的能量低于10年代地球的体积和质量磁气圈。成为带正电荷数10年代伏,防止低能离子达到的粒子探测器宇宙飞船。(MMS)观察表明,超低频(ULF)波驱动的低能离子漂移E×B方向漂移速度等于V_ (E×B)和低能离子加速足够的总能量来衡量的MMS /快速双离子等离子体调查光谱仪。流量峰值出现在MMS1的双重离子谱仪测量与理论吻合良好计算H ~ +离子能量E×B漂移。离子能量密度低于最低范围能量阈值介于1和3厘米~ (3)磁气圈的热带的地区这一事件。

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