S. D. Shuvalov

University of Colorado Boulder | CUB · Laboratory for Atmospheric and Space Physics (LASP)

Heavy cold ions at Mars are gravitationally bound to the planet unless some process provides energy to them. Observations show that cold (<20 eV) and dense (∼>1 cm⁻³) O⁺/O2⁺ ions with bulk velocities equal to energies ∼1 keV can reach deep into the nightside Martian magnetosheath. These ions are co‐located with a change of the sign of the sunward c...

Previous observation of a single hot flow anomaly (HFA) at Earth by MMS mission reported solar wind protons effective acceleration inside these structures to nearly 1 MeV under certain conditions via first-order Fermi acceleration process. Current study focuses on the analysis of a single HFA registered at Mars by MAVEN spacecraft. The event is cha...

According to various orientation of the interplanetary magnetic field (IMF), the planetary shock can be either quasi‐parallel or quasi‐perpendicular. Under quasi‐parallel conditions a significant number of solar wind suprathermal particles are reflected from the shock and drift along IMF, forming an extended and highly turbulent region called the f...

In front of the bow shock with a quasi-parallel configuration of the interplanetary magnetic field, there exists a region called a foreshock, in which many nonstationary processes take place, the largest of which are collectively named “foreshock transients.” The size of these formations can reach tens of Earth radii, which significantly influences...

Measurements of ion velocity distributions are one of basic goals of space plasma studies. There is variety of ion and electron spectrometers (see, for example, Wüest et al., 2007; Young et al., 2007; Zurbuchen and Gershman, 2016; Vaisberg et al., 2016). The most commonly used ion spectrometer is the top-hat analyzer (Carlson et al., 1983) consisti...

In front of the bow shock with a quasi-parallel configuration of the interplanetary magnetic field, there exists a region called a foreshock, in which many nonstationary processes take place, the largest of which are collectively named “foreshock transients.” The size of these formations can reach tens of Earth radii, which significantly influences...

In this study we present the observation of Mercury’s inner southern magnetosphere and surrounding regions, never previously explored, as detected by the two ion sensors of the instrument package: ‘Search for Exospheric Refilling and Emitted Natural Abundances’ (SERENA), named ‘Planetary Ion CAMera’ (PICAM) and ‘Miniaturized Ion Precipitation Analy...

This article presents the results of development and testing of a simple and compact ion energy-mass analyzer. PICA (Plasma Ion Compact Analyzer) is designed as a solution for solar wind measurements, polar proton precipitation monitoring and as a miniature solution for various space plasma experiments. We introduce general ideas that lead to the d...

Current sheets (CSs) are widespread objects in space plasma capable of storing and, then, explosively releasing the accumulated magnetic energy. In planetary magnetotails the cross-tail CS plays an important role in the global dynamics of the tail and in the transformation of the magnetic energy into the kinetic and thermal energies of the ambient...

Analysis of Mars Atmosphere and Volatile Evolution (MAVEN)/Supra‐Thermal And Thermal Ion Composition observations in the Martian upper atmosphere, bounded at higher altitudes by the shocked solar wind, shows that the draping of interplanetary magnetic field penetrates down to low altitudes (∼200−250 km) and governs dynamics of the ionosphere. The u...

The objective of this White Paper submitted to ESA's Voyage 2050 call is to get a more holistic knowledge of the dynamics of the Martian plasma system from its surface up to the undisturbed solar wind outside of the induced magnetosphere. This can only be achieved with coordinated multi-point observations with high temporal resolution as they have...

The comprehensive suite of scientific instruments with high temporal resolution measurements on the Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft allowed studies of the structure and properties of the dayside magnetosphere of Mars. The dayside plasma envelope was found on first Mars orbiters (Vaisberg et al., 1976, Gringauz et al., 1976...

A Correction to this paper has been published: https://doi.org/10.1007/s11214-021-00809-8

The ESA-JAXA BepiColombo mission to Mercury will provide simultaneous measurements from two spacecraft, offering an unprecedented opportunity to investigate magnetospheric and exospheric particle dynamics at Mercury as well as their interactions with solar wind, solar radiation, and interplanetary dust. The particle instrument suite SERENA (Search...

This study is based on measurements of the energy-mass analyzer Suprathermal and Thermal Ion Composition instrument (STATIC, McFadden et al., 2015) and magnetometer (MAG, Connerney et al., 2015) on the NASA Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft (Jakosky et al., 2015). 48 passes of MAVEN at SZA < 70° in the northern hemisphere on...

The work is dedicated to solving the problem of miniaturization of plasma instruments, in particular, the development of a miniature ion analyzer for small spacecraft. The described instrument can be used as part of a prognostic and diagnostic complex designed to monitor the conditions in the solar wind and detect critical events. The target parame...

Dayside magnetosphere of Mars is a thin layer with usually increased magnetic field and heated planetary ions between the magnetosheath and the ionosphere. The Mars Atmosphere and Volatile Evolution Mission (MAVEN) spacecraft provided, for the first time, high temporal and spatial resolution measurements enabling to study the structure of this regi...

White Paper in response to the ESA's Voyage-2050 Call

The objective of this White Paper submitted to ESA's Voyage 2050 call is to get a more holistic knowledge of the dynamics of the Martian plasma system from its surface up to the undisturbed solar wind outside of the induced magnetosphere. This can only be achieved with coordinated multi-point observations with high temporal resolution as they have...

We present a statistical study of propagation characteristics of Hot Flow Anomalies (HFAs) at Mars based on 19 manually selected events registered by the NASA Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft. Based on the number of registered events during the observed time interval we conclude that HFAs are common foreshock transients at...

Measurements of Ion velocity distributions are one of basic goals of space plasma studies. There is variety of ion and electron spectrometers (e.g. Wuest et al, 2007, Young et al., 2007, Zurbuchen and Gershman, 2016, Vaisberg et al, 2016). The most frequently used ion spectrometer is top-hat analyzer (Carlson et al., 1983) consisting of toroidal el...

The characteristics of a hardware–software facility for laboratory adjustments and calibrations of plasma energy–mass spectrometers, which are created within the framework of Russian and international space missions, are presented. The principle of operation of the ARIES-L instrument is described and the results of functional tests of instruments t...

Plain Language Summary We investigate the structure of cross‐tail current sheets (CSs) in the Martian magnetotail. The CSs play a crucial role in the conversion of magnetic energy into kinetic and thermal energy of plasma particles via magnetic reconnection. Signatures of magnetic reconnection were reported in the Martian magnetotail, but the mecha...

We analyzed 44 passes of the MAVEN spacecraft through the magnetosphere, arranged by the angle between electric field vector and the projection of spacecraft position radius vector in the YZ plane in MSE coordinate system (${\theta}$ E ). All passes were divided into 3 angular sectors near 0{\deg}, 90{\deg} and 180{\deg} ${\theta}$ E angles in orde...

Numerous studies of the current sheets (CS) in the Earth's magnetotail showed that quasi-adiabatic ion dynamics plays an important role in the formation of complicated multilayered current structures. In order to check whether the similar mechanisms operate in the Martian magnetotail, we analyzed 80 CS crossings using MAVEN measurements on the nigh...

Simultaneous operation of two Mars satellites, equipped with instruments for the study of the plasma environment close to Mars, the European satellite Mars Express and American satellite MAVEN, allows one to investigate the influence of the interplanetary environment on the Martian magnetosphere and atmospheric losses, induced by the solar wind, fo...

During the last 15 years, the Current Sheets (CSs) have been intensively studied in the tail of the terrestrial magnetosphere, where protons are the dominated ion component. On the contrary, in the Martian magnetotail heavy ions (O⁺ and⁺0) usually dominate while the abundance of protons can be negligible. Hence it is interesting to study the spatia...

MAVEN spacecraft provides new opportunities for analysis of Martian environment and physical process in near-Mars space. One of interesting regions of near-Mars space is the Martian magnetosphere that is formed from mass-loaded magnetic flux tubes. There is quite detailed knowledge of the night-side magnetosphere of Mars, however the number of publ...

Increasing the temporal resolution and instant coverage of velocity space of space plasma measurements is one of the key issues for experimentalists. Today the top-hat plasma analyzer appears to be the favorite solution due to its relative simplicity and the possibility to extend its application by adding a mass-analysis section and an electrostati...

We analyze an event in front of the bow shock observed by Cluster spacecraft on 22.02.2006. This event has many attributes of Hot Flow Anomaly at early stage of development including strong upstream beam and disturbed magnetic profile with increased magnetic field at one or two sides as observed by 4 Cluster spacecraft. The angle between the magnet...