Alle Veranstaltungen im Kalender

Februar 2018
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Top launch reflectometer access on AUG

von 15:30 bis 16:30 Uhr

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D-retention in tungsten irradiated by different ions

!!! Moved again, now to 21.02., 13:30 (before EUROfusion meeting) !!!

von 13:30 bis 14:30 Uhr

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Seminare und Vorträge 2018

Übersicht über alle zukünftigen IPP-Seminare, -Kolloquien und Vorträge

Wall Forum

Understanding the fundamental mechanisms behind H embrittlement: An ab initio guided multiscale approach

  • !!! Unusual date: Tuesday morning !!!
  • Datum: 27.02.2018
  • Uhrzeit: 10:30 - 11:30
  • Vortragender: Prof. J. Neugebauer
  • Max-Planck-Institut für Eisenforschung, Max-Planck-Str. 1, 40237 Düsseldorf, Germany
  • Ort: Garching
  • Raum: Seminarraum D3
  • Gastgeber: IPP

The mechanical integrity of many structural materials is affected by the presence of hydrogen. Even minute amounts of a few ppm may give rise to fracture and embrittlement. From a modeling point of view, the descriptionof the impact of H on mechanical properties is challenging since hydrogen is known to interact with almost all microstructural and point defects. Thus, a quantitative description of how H impacts and interacts with the various defects requires to model large length and time scales while also having to take into account atomistic effects. In the talk it will be shown how by combining ab initio calculations with thermodynamic concepts the relevant mechanisms at atomic scale can be identified. Based on these insights atomistically informed mesoscale/macroscale concepts are constructed that allow to model H embrittlement on the length and time scales relevant for experiment. [mehr]

ASDEX Upgrade Seminar

TOK Seminar

ASDEX Upgrade seminar: ASDEX Upgrade Seminar

DPG rehearsals, talk II

[mehr]

ASDEX Upgrade seminar: ASDEX Upgrade Seminar

TOK Seminar

DPG talks rehearsal

[mehr]

DPG rehearsals PWI

Rehearsals of PWI-related student contributions to the DPG spring conference. Talks (20 min + 15 min discussion each) and Posters. [mehr]

TOK Seminar

Edge Physics Forum

Assessment of the strength of kinetic effects of parallel electron transport in the SOL and divertor of JET high radiative H-mode plasmas using EDGE2D-EIRENE and KIPP codes

KInetic code for Plasma Periphery (KIPP) was used to assess the importance of kinetic effects of parallel electron transport in the SOL and divertor of JET high radiative H-mode inter-ELM plasma conditions with the ITER-like wall and strong nitrogen (N2) injection. Plasma parameter profiles along B from one of the EDGE2D-EIRENE simulation cases were used as an input for KIPP, which in turn calculated electron distribution functions, fe, parallel power fluxes, electron-ion thermoforces, Debye sheath potential drops and electron sheath transmission factors at divertor targets. For heat fluxes in the main SOL, KIPP results showed deviations from classical (e.g. Braginskii) fluxes by factors typically ~ 1.5, with the flux limiting upstream and flux enhancement near entrances to the divertor. Inside the divertor, closer to the separatrix, very large heat flux enhancement factors, up to 10 or even higher, indicative of a strong non-local heat transport, were found at the outer target, with fe exhibiting bump-on-tail features at high energies. Under such extreme conditions, however, contributions of conductive fluxes to total power fluxes were strongly reduced, with convective fluxes becoming comparable, or even exceeding, the conductive fluxes. Electron-ion thermoforce, on the other hand, which is known to be determined mostly by thermal and sub-thermal electrons, was found to be in a good agreement with Braginskii formulas, including the Zeff dependence. Overall, KIPP results indicate, at least for plasma conditions used in this modelling, a sizable, but not dominant effect of kinetics on parallel electron transport. [mehr]

HEPP Seminar

HEPP Workshop Good Scientific Practice (for PhD students)

Der Kurs „Gute wissenschaftliche Praxis“ bietet eine Einführung in forschungsethisches Fachwissen, in die Bedeutung von Werten und Haltungen von Forschenden und in die notwendigen Fertigkeiten im Umgang mit konfliktbehafteten Situationen in der Forschungspraxis. Die Teilnehmenden erwerben Kenntnisse über die Regeln guter wissenschaftlicher Praxis und beschäftigen sich mit den Kompetenzen zum Treffen verantwortlicher Entscheidungen im Forschungsalltag. [mehr]

Seminar

Good Scientific Practice for Scientists and Supervisors - Protecting Scientific Integrity

The major objective of the course “Good Scientific Practice - Protecting Scientific Integrity” is an introduction to the basic rules and values of the responsible conduct of research, according to local, national and international regulations and guidelines.The course is directed at all scientists who would like to refresh their knowledge about good scientific practice for their own work or the supervision of PhD and master students. [mehr]

Institutskolloquium

The future of the energy - a systems view

Based on scenario and energy systems modeling, the talk provides a perspecitve on the requirements and challenges for the future energy system and the role of energy sources such as nuclear, bio, solar and wind and the growth and development of energy carriers such as electricity, hydrogen and hydro-carbons. The talk provides a first principles perspective on resource costs, sustainability and reliability and highlights the trade-offs that different energy resources provide. The central role of energy technology research and innovation is highlighted. [mehr]

 
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