Basel Universität

Laurent Marot

Postdoc
PhD in Physics
office 3.01a
tel +41 (0)61 207 3720 (office)



laurent

Research interest

Electron Spectroscopy for Chemical Analysis (ESCA)
Fusion: Plasma-wall interaction studies related to fusion reactor materials

In a fusion reactor, and especially in the International Thermonuclear Experimental Reactor (ITER),
knowledge of the plasma parameters is of highest interest to control and understand the
performances of such a device. In today's tokamaks, the plasma is viewed through optical windows
or fibre optics for many diagnostics. However, the high level of radiation expected in ITER will
render this conventional approach impossible.
Metallic mirrors will be used either as plasma-facing components or as light transmitter through a
labyrinth, and therefore the first mirror (FM) will be one of the most critical elements of ITER
diagnostics systems. It must survive in an extreme environment (intense UV and X-rays radiation
as well as particle fluxes due to charge exchange neutrals) and has to maintain a good optical
performance.
In Basel research is focused on the investigation of the erosion and deposition mechanisms
affecting the optical reflectivity of potential materials for first mirrors of ITER both by active
collaborations with groups from different Tokamak sites and by simulation in laboratory
experiments.

Another part is the preparation of metallic coated mirrors by magnetron sputtering or
evaporation, to obtain nanometric crystallites films, like rhodium or molybdenum, with
a high reflectivity.

The last topic is to study the interaction of the first wall (tungsten) of fusion reactor
with several plasma especially for DEMO (DEMOnstration Power Plant).

Publications

Latest Papers (show all)

Nanostructuring of an alkali halide surface by low temperature plasma exposure
A. Hinaut, B. Eren, R. Steiner, S. Freund, R. Jöhr, Th. Glatzel, L. Marot, E. Meyer and S. Kawai
Physical Chemistry Chemical Physics, (2017), pdf.
Surface chemistry of rare-earth oxide surfaces at ambient conditions: reactions with water and hydrocarbons
Elcin Kuelah, Laurent Marot, Roland Steiner, Andriy Romanyuk, Thomas A Jung, Aneliia Waeckerlin, Ernst Meyer
Scientific Reports, 7, (2017), 43369, pdf.
In situ cleaning of diagnostic first mirrors: an experimental comparison between plasma and laser cleaning in ITER-relevant conditions
A Maffini, L Moser, L Marot, R Steiner, D Dellasega, A Uccello, E Meyer, M Passoni
Nuclear Fusion, 57, (4), (2017), 046014, pdf.
Plasma impact on diagnostic mirrors in JET
Alvaro Garcia-Carrasco, P Petersson, M Rubel, A Widdowson, E Fortuna-Zalesna, S Jachmich, M Brix, L Marot, JET Contributors
Nuclear Materials and Energy, (2017), pdf.

Latest Talks (show all)

Caracterisation ncAFM de defauts atomiques crees par plasma a basse temperature sur la surface de KBr(001)
A. Hinaut , B. Eren, S. Freund, R. Joehr, R. Steiner, Th. Glatzel, L. Marot, E. Meyer, S. Kawai
Forum des microscopies a sonde locale, 2017-03-20, Montpellier, (France).
Atomic scale defects on KBr(001) created by low temperature plasma and investigated by ncAFM
A. Hinaut , B. Eren, S. Freund, R. Joehr, R. Steiner, Th. Glatzel, L. Marot, E. Meyer, S. Kawai
SAOG, 2017-01-27, Fribourg, (Switzerland).
Chain-like structure elements in Ni40Ta60 metallic glasses observed by scanning tunneling microscopy
R. Pawlak , L. Marot, A. Sadeghi, S. Kawai, T. Glatzel, P. Reimann, S. Goedecker, H.-J. Güntherodt, E. Meyer
eMRS, 2014-07-15, Warsow, (Poland).
Chain-like structure elements in Ni40Ta60 metallic glasses observed by scanning tunneling microscopy
R. Pawlak , L. Marot, A. Sadeghi, S. Kawai, T. Glatzel, P. Reimann, S. Goedecker, H.-J. Güntherodt, E. Meyer
NanoManipulation Workshop, 2014-06-18, Mulhouse, (France).