Job shadowing (Year 10, Year 11 students) See https://www.math.univ-paris-diderot.fr/diffusion/index
Key figures
Key figures
189 people work at LJLL
86 permanent staff
80 researchers and permanent lecturers
6 engineers, technicians and administrative staff
103 non-permanent staff
74 Phd students
15 post-doc and ATER
14 emeritus scholars and external collaborators
January 2022
Stability and interaction with walls for magnetic fusion plasmas
Upcoming seminars (See events in the agenda)
Tuesday 21 January 2021 at 11am : Claude Bardos (Université de Paris)
Quasilinear Approximation of the Vlasov Equation
Summary
The object of this talk is to report on a joint ongoing program with Nicolas Besse Prof. Observatoire de la Cote d’Azur et Université de Nice.
The quasi linear approximation for solutions of the Vlasov equation is a very popular tool in Plasma Physic cf. [1] which proposes, for the quantity :
q ( ∫f (x, v, t)dx) , (1)
the solution of a parabolic, linear or non linear evolution equation
∂_t q(t, v) − ∇_v (D(q, t ; v)∇_v q) = 0 . (2)
Since the Vlasov equation is a hamiltonian reversible dynamic while (2) is not reversible whenever D(q, t, v) ≠ 0 the problem is subtle. Hence I will do the following things :
1. Give some sufficient conditions, in particular in relation with Landau damping that will imply that D(q, t, v) ≃ 0 .
2. Building on contributions of [3] and coworkers show the validity of the approximation (2) for large time and for a family of convenient randomized solutions.
3. In the spirit of a Chapman Enskog approximation formalize the very classical physicist approach for a short time approximation under analyticity assumptions.
References
[1] Plasma Physic in the 20th century as told by players. Guest editors.:P. Diamond, U. Frisch and Y. Pomeau. Vol 43 , 4-5, December 2018.
[2] N.A. Krall, A.W. Trivelpiece Principles of plasma physics, McGraw-Hill, 1973.
[3] F. Poupaud, A. Vasseur, Classical and quantum transport in random media, J. Math. Pures Appl. 82 711–748 (2003).
Location
Seminar room 15-16, 3rd floor, room 309
Laboratoire Jacques Louis Lions
Sorbonne Université
4 place jussieu, 75252 Paris FRANCE
You can get easy access to the place with the lift of tower 16, situated on the left when arriving on the campus.map
Motivations
The working group meets on Tuesday at 11:00 a.m. (in principle). All topics concerning mathematical, numerical or physical modelling of magnetic fusion plasmas are possible, with a preference for stability issues and the interaction of the plasma with the edges.
In this section
- 2018-GdT ITER - G.-H. Cottet
2018-GdT ITER - F. Casas
2018-GdT ITER - N. Besse
2018-GdT ITER - C. Cheverry
2018-GdT ITER - M. Badsi
2018-GdT ITER - S. Colombi
- 2016-GdT ITER - P.-Q. Elias
2016-GdT ITER - F. Hindenlang
2016-GdT ITER - L.M. Imbert-Gérard
2016-GdT ITER - Soutenance de thèse de Mehdi Badsi
2016-GdT ITER - A. Monmayrant
2016-GdT ITER - N. Crouseilles
- 2015-GdT ITER - S. Kobayashi
2015-GdT ITER - R. Duclous
2015-GdT ITER - M. Herda
2015-GdT ITER - J. Barre
2015-GdT ITER - P. Henri
2015-GdT ITER - M. Campos-Pinto
- 2014-GdT ITER - ANR Chrome
2014-GdT ITER - E. Franck
2014-GdT ITER - G. Faure
2014-GdT ITER - T. Boulmezaoud
2014-GdT ITER - P. Helluy
2014-GdT ITER - G.Manfredi
2014-GdT ITER - M. Lutz
- 2013-GdT ITER - B.Després
2013-GdT ITER - E. Spence
2013-GdT ITER - B. Nkonga
2013-GdT ITER - M. Badsi
2013-GdT ITER - S. Labrunie & O. Lafitte
2013-GdT ITER - A. Parsania
2013-GdT ITER - E. Franck
2013-GdT ITER - R. Sentis
2013-GdT ITER - D. Doyen
2013-GdT ITER - R. Hiptmair
2013-GdT ITER - F. Filbet
2013-GdT ITER - I. Bouya
2013-GdT ITER - S. Brull
- 2012-GdT ITER - B. Després
2012-GdT ITER journée CHROME sur les PMLs
2012-GdT ITER - C. Bardos
2012-GdT ITER - T. Goudon
2012-GdT ITER - L.M. Imbert-Gérard
2012-GdT ITER - S. Hirstoaga
2012-GdT ITER - N. Crouseille
2012-GdT ITER - B. Després
2012-GdT ITER - A. Ratnani