EGU2020-4720, updated on 12 Jun 2020
https://doi.org/10.5194/egusphere-egu2020-4720
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

The Proton and Alpha Sensor (PAS) of Solar Orbiter Mission: design, operation, scientific return simulation, and first flight results

Philippe Louarn1, andrei fedorov, Christopher Owen, and the SWA/PAS team*
Philippe Louarn et al.
  • 1IRAP, CNRS, Toulouse University, Toulouse, France (philippe.louarn@irap.omp.eu)
  • *A full list of authors appears at the end of the abstract

Solar Orbiter is an ESA/NASA mission that will provide an unprecedented opportunity to discover the fundamental connections between the rapidly varying solar atmosphere and the solar wind. The Solar Wind Analyzer (SWA) plasma package shall provide comprehensive in-situ measurements of the solar wind. In particular, the Proton-Alpha Sensor (PAS) will determine the properties of the dominant solar wind ion population through the measurement of the 3D distribution function, density, bulk velocity, temperature, and heat fluxes, at temporal cadences ranging form 4 s to ~0.1 s. The closest approach of Solar Orbiter to the Sun is 0.28 AU. At this distance the solar wind Vow, solar UV, and solar infrared fluxes increase by a factor 13 compared to near-Earth space. The PAS instrument will provide high cadence 3D distribution function measurements (up to 13 per second) all the way from closest approach to 1 AU. This paper give a basic information about PAS design, and describes the PAS measurement scheme adopted for varying solar wind conditions and our approach to the fast sampling of 3D distribution functions. We also provide a simulations of the expected scientific return. If possible, a first glance of PAS commissioning results will be presented.

SWA/PAS team:

C. J. Owen, R. Bruno, S. Livi, P. Louarn, K. Al Janabi, F. Allegrini, C. Amoros, R. Baruah, A. Barthe, M.Berthomier, S. Bordon, C. Brockley-Blatt, C. Brysbaert, G. Capuano, M. Collier, R. DeMarco, A. Fedorov, J.Ford, V. Fortunato, I. Fratter, A. Galvin, B. Hancock, D. Heirtzler, D. Kataria, L. Kistler, S.T. Lepri, G.Lewis, C. Loe_er, W. Marty, R. Mathon, A. Mayall, G. Mele, K. Ogasawara, M. Orlandi, A. Pacros, E.Penou, S. Persyn, M. Petiot, M. Phillips, L. Pˇrech, J.M. Raines, M. Reden, A. Rouillard, A. Rousseau, J.Rubiella, H. Seran, A. Spencer, J.W. Thomas, J. Trevino, D. Verscharen; , A. Alapide, L. Amoruso, N.André, C. Anekallu, V. Arciuli, K.L. Arnett, R. Ascolese, C. Bancroft, P. Bland, M. Brysch, R. Calvanese,M. Castronuovo, I. Cˇ ermák, D. Chornay, S. Clemens, J. Coker, G. Collinson, R. D’Amicis, I. Dandouras, R.Darnley, D. Davies*, G. Davison, A. De Los Santos, P. Devoto, G. Dirks, E. Edlund, A. Fazakerley, M. Ferris,C. Frost, G. Fruit, C. Garat, V. Génot, W. Gibson*, J.A. Gilbert, V. de Giosa, S. Gradone, M. Hailey, T.Horbury, T. Hunt, C. Jacquey, M. Johnson, B. Lavraud, A. Lawrenson, F. Leblanc, W. Lockhart, M.Maksimovic, A. Malpus, F. Marcucci, C. Mazelle, F. Monti, S. Myers, T. Nguyen, J. Rodriguez-Pacheco, I.Phillips, M. Popecki; , K. Rees, S.A. Rogacki, K. Ruane, D. Rust, M. Salatti, J.A. Sauvaud, M.O. Stakhiv,J. Stange, T. Stubbs, T. Taylor, J.-D. Techer, G. Terrier, R. Thibodeaux, C. Urdiales, A. Varsani, A. P. Walsh,G. Watson, P. Wheeler, G. Willis, R. F. Wimmer-Schweingruber, B. Winter, J. Yardley, and I. Zouganelis

How to cite: Louarn, P., fedorov, A., and Owen, C. and the SWA/PAS team: The Proton and Alpha Sensor (PAS) of Solar Orbiter Mission: design, operation, scientific return simulation, and first flight results, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-4720, https://doi.org/10.5194/egusphere-egu2020-4720, 2020

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