Nils Janitzek

Internal Research Fellow in the Solar Orbiter Group at ESAC

 

Main Research Fields

I am investigating kinetic processes of heliospheric ion populations using in-situ particle measurements over a wide energy range from solar wind to solar energetic particles.

During my PhD, I studied nonthermal signatures of heavy ion velocity distributions in the undisturbed solar wind that provide unique information on solar wind acceleration, heating, transport and thermalization.

My current work at ESA aims to improve our understanding of ion acceleration at heliospheric shocks driven by coronal mass ejections (CMEs) and corotating interaction regions (CIRs). The upcoming Solar Orbiter mission will make high-resolution observations of heavy ions in the inner heliosphere by approachng the Sun as close as 0.3 AU. At such small distances we expect to observe the shock acceleration of solar wind and suprathermal ions “at work”, so that one can effectively relate the local shock properties to the kinetic signatures of the accelerated particle populations. These studies will provide us with deeper insights into ion shock acceleration throughout the universe but also aim to enable a better estimate of the space weather impact of CIR and CME related shocks, potentially allowing more accurate forecasts at Earth.

 


Keywords

Space Plasma In-Situ Measurements
Solar Wind
Solar Energetic Particles
Space Weather

Ongoing collaborations

- Lars Berger, Robert Wimmer-Schweingruber, University of Kiel, Kiel, Germany

- Raúl Gómez-Herrero, Javier Rodriguez-Pacheco, University of Alcalá, Alcalá de Henares, Spain

- Zdenek Nemecek, Jana Safrankova, Charles University, Prague, Chech Republik

Publications

Refereed papers:

Nemecek, Z., Durovcova, T., Safrankova, J., Matteini, L., Stansby, D., Janitzek,
N. P., Berger, L., Wimmer-Schweingruber, R. F. What is the solar wind frame
of reference?, (accepted for Astronomy&Astrophysics, 2020)

Janitzek, N. P., Berger, L., Taut, A., Bochsler, P., Klecker, B., and Wimmer-
Schweingruber, R. F., 2016, High time-resolution measurements of solar wind
heavy ions with SOHO/CELIAS/CTOF, AIP Conference Proceedings 1720,
040006 (2016); DOI: 10.1063/1.4943817

Strugarek, A., Janitzek, N. P., Lee, A., et. al., 2015, A space weather mission
concept: observatories of the solar corona and active regions (OSCAR), J.
Space Weather Space Clim., 5, A4 (2015); DOI: 10.1051/swcs/2015003

 

Papers in preparation (to be refereed):

Janitzek, N. P., Berger, L., Taut, A., Bochsler, P., Klecker, B., and Wimmer-
Schweingruber, R. F., Systematic measurements of solar wind heavy ion differential
streaming with SOHO/CELIAS, (to be submitted to Astronomy & Astrophysics in early 2020),

Janitzek, N. P., Berger, L., Wimmer-Schweingruber, R. F., Heavy ion kinetic
temperatures mesured at 1 AU with SOHO/CELIAS, to be submitted to Astronomy & Astrophysics in spring 2020)

Project/mission at ESA

Solar Orbiter