A5023492590- Astro and Planetary Science
- Planetary Science and Exploration
- Magnetic confinement fusion research
- Fusion materials and technologies
- Laser-Plasma Interactions and Diagnostics
- Space Exploration and Technology
- Isotope Analysis in Ecology
- Ionosphere and magnetosphere dynamics
- Plasma Diagnostics and Applications
- Atmospheric Ozone and Climate
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Solar and Space Plasma Dynamics
- Nuclear reactor physics and engineering
- Atomic and Molecular Physics
- Spacecraft and Cryogenic Technologies
- Gas Dynamics and Kinetic Theory
- Stellar, planetary, and galactic studies
- Muon and positron interactions and applications
- Astrophysics and Star Formation Studies
- Laser-induced spectroscopy and plasma
- Scientific Research and Discoveries
- Mass Spectrometry Techniques and Applications
- Geomagnetism and Paleomagnetism Studies
- Radiative Heat Transfer Studies
Max Planck Institute for Plasma Physics - Greifswald
2015-2022
Max Planck Institute for Plasma Physics
2014-2021
Max Planck Society
2014-2021
Universität Greifswald
2015-2019
Forschungszentrum Jülich
2019
Australian National University
2016
Oak Ridge National Laboratory
2016
Physikalisch-Technische Bundesanstalt
2016
University of Opole
2016
CEA Cadarache
2016
The Cassini‐Huygens probe gas chromatograph mass spectrometer (GCMS) determined the composition of Titan atmosphere from ∼140 km altitude to surface. After landing, it returned data gases evaporated Height profiles molecular nitrogen (N 2 ), methane (CH 4 and hydrogen (H ) were determined. Traces detected on surface evaporating methane, ethane (C H 6 acetylene cyanogen N carbon dioxide (CO ). showed evidence that precipitation occurred recently. mole fraction was (1.48 ± 0.09) × 10 −2 in...
The Galileo probe mass spectrometer determined the composition of Jovian atmosphere for species with masses between 2 and 150 amu from 0.5 to 21.1 bars. This paper presents results analysis some constituents detected: H2, He, Ne, Ar, Kr, Xe, CH4, NH3, H2O, H2S, C2 C3 nonmethane hydrocarbons, possibly PH3 Cl. 4He/H2 in was measured be 0.157 +/- 0.030. 13C/C12 found 0.0108 0.0005, D/H 3He/4He were measured. Ne depleted, < or = 0.13 times solar, Ar 1.7 Kr 5 Xe solar. CH4 has a constant mixing...
Direct measurements of neutral CO 2 , O, CO, N He, and densities from the Pioneer Venus Orbiter Neutral Mass Spectrometer are described in terms a spherical harmonic representation (latitude local time coordinates) exospheric temperature number at 150 km, using modified Bates profiles. The temperatures determined altitude variations atomic oxygen. A global average 228°K is derived with first variation 57%. profiles extended downward to 100 km by empirical formulas provide transition through...
The neutral gas composition and density in the thermosphere of Venus is being measured with a quadrupole mass spectrometer on Pioneer orbiter. Data are obtained near periapsis once per day approximately 150–250 km above surface. principal gases CO 2 , CO, N O, N, He. Atomic oxygen major constituent 155 dayside also nightside up to 180 when helium becomes constituent. average values remain nearly constant during night, but an abrupt change occurs across terminator from high value low value....
We present Cassini Ion and Neutral Mass Spectrometer (INMS) measurements of ion densities on the nightside Titan from April 16, 2005, show that a substantial ionosphere exists complex chemistry is operating there. The total ionospheric measured both by INMS Radio Plasma Wave (RPWS) experiments suggest precipitation magnetosphere into atmosphere electrons with energies ranging 25 eV up to about 2 keV taking place. absence composition has been major obstacle understanding ionosphere. Seven...
After completing the main construction phase of Wendelstein 7-X (W7-X) and successfully commissioning device, first plasma operation started at end 2015. Integral start-up using electron cyclotron resonance heating (ECRH) an extensive set diagnostics have been completed, allowing initial physics studies during operational campaign. Both in helium hydrogen, breakdown was easily achieved. Gaining experience with vessel conditioning, discharge lengths could be extended gradually. Eventually,...
Four rocket-borne ejectable instruments, called ‘thermosphere probes,’ launched into the thermosphere above Wallops Island, Virginia, have measured concentration and temperature of molecular nitrogen electrons under various atmospheric conditions during period approaching solar minimum. A fixed-tuned omegatron mass spectrometer mounted within an orificed chamber was employed for N2 measurements. The gas derived from scale height, in some cases directly by a velocity scan technique....
Wendelstein 7-X is a highly optimized stellarator that went into operation in 2015. With 30 cubic meter volume, superconducting coil system operating at 2.5 T, and steady-state heating capability of eventually up to 10 MW, it was built demonstrate the benefits stellarators parameters approaching those fusion power plant. We report here on first results with test divertor installed, during second phase, which performed half 2017. Operation divertor, addition several new fueling systems,...
The Galileo Probe Mass Spectrometer provided the first data on noble gas mixing and isotope ratios in Jovian atmosphere. These measurements comparison with solar values constrain models of Jupiter's formation. Significant refinements to initially reported abundances argon, krypton, xenon have been enabled through post‐encounter laboratory calibrations using a refurbished engineering unit mass spectrometer nearly identical flight unit. relative hydrogen for are respectively 2.5±0.5, 2.7±0.5,...
The determination of the temperature neutral gas at location satellite is based on measurement velocity distribution molecular nitrogen. Measurement thermal‐velocity component in presence free‐stream will be obtained through application velocity‐scan technique and, independently, use a baffle technique. A 3‐cm diameter spherical sampling chamber with 0.5‐cm precisely‐knife‐edged orifice located equator to permit free diffusion atmosphere gases between interior and atmosphere. connected...
Using the neutral atmosphere temperature instrument on AE‐E in circular orbit at 275 km and inclination 19°, we have measured kinetic of N 2 throughout many orbits, providing for first time direct situ measurements diurnal variation. In particular observed that near midnight increases substantially, sometimes to values greater than afternoon maximum. Increases are about one‐half made showing feature be a persistent one. The meridional component (N ) wind is simultaneously by correlates well...