Raum: Seminarraum D3

Observation of Hydrogen Isotope Exchange in Permeation Experiments

Wall Forum
[mehr]

Deuterium Permeation through Tungsten Near Room Temperature Investigated Using a Getter Layer

Wall Forum
Knowledge about deuterium retention and diffusion in tungsten is important for the design of future fusion reactors. A large number of experiments have been carried out to study the retention of deuterium in tungsten after plasma exposure near room temperature, which is dominated by trapping of deuterium near material defects. The results are usually modeled using diffusion data extrapolated from much higher temperatures, since the dynamic effects of deuterium diffusion in tungsten are difficult to measure near room temperature, due to the very low solubility of deuterium in tungsten. It is thus important to test the validity of this extrapolation and the model used by measuring and modeling of the diffusion dynamics near room temperature. In this talk, a method based on deuterium plasma loading on one side and accumulation of permeating deuterium in a getter layer on the other side of the sample, is presented. The amount of deuterium in the getter is analyzed after the plasma exposure using nuclear reaction analysis. By exposing samples to the plasma for different times, information about the temporal evolution of the deuterium permeation flux and thus the dynamic effects mentioned above can be gained. [mehr]

Scientific Talks - Presentations Skills for Non-Native English Speakers

HEPP Seminar
  • Beginn: 31.08.2016 09:00
  • Ende: 01.09.2016 17:00
  • Vortragende(r): Barbara Hey
  • Barbara Hey ist seit 1999 Trainerin und Beraterin des Zentrums für Europäische Wirtschaftsforschung. Ihre Tätigkeitsschwerpunkte umfassen die Themen Präsentation, Moderation und Kommunikation. Barbara Hey trainiert, coacht und berät Wissenschaftlerinnen und Wissenschaftler sowie Führungskräfte aus der Wirtschaft. Ihr Buch „Präsentieren in Wissenschaft und Forschung“ erschien im Februar 2011.
  • Ort: Garching
  • Raum: Seminarraum D3
  • Gastgeber: HEPP
  • Kontakt: hepp@ipp.mpg.de
Giving a presentation puts you on public display. In many ways your research reputation will be enhanced or diminished. Thus, effective communication of scientific knowledge is an essential component of any career in science. Increasingly, the ability to present one’s research in English is becoming ever more important for scientists of all disciplines. Talks at a conference or an internal seminar must convince the audience that the work presented is important, valid, and that it matters to them. Preparing and giving effective talks requires a content that is worth the attention of the audience, a sound knowledge of English and excellent presentations skills. [mehr]

Deuterium migration in erbium oxide coating for tritium permeation barrier

Wall Forum
A ten-year study on erbium oxide coating in collaboration with IPP is reviewed. Hydrogen isotope diffusion, solution, and permeation behaviors have been elucidated through experimental and computational approaches. Recent progress will be also introduced in the presentation. [mehr]

Deuterium implantation into Y2O3-doped and pure tungsten: A comparison of blistering and deuterium retention

Wall Forum
The blistering and near-surface deuterium retention of Y2O3-doped W and two different pure W grades were studied after exposure to deuterium (D) plasma at elevated temperatures (370, 450 and 570 K) in PlaQ. The research shows blistering and deuterium retention were strongly dependent on the implantation temperature. In addition, blistering was sensitively influenced by the used tungsten grade, although the total amount of retained D measured by nuclear reaction analysis was comparable. Among the three different investigated tungsten grades, Y2O3-doped W exhibited the lowest degree of surface modification despite a comparable total D retention. [mehr]

Design of a laboratory scale device for centrifugal infiltration of cylindrical tungsten fibre preforms with copper

Wall Forum
Within the present work, a device for manufacturing tungsten fiber reinforced copper metal matrix composite pipes by means of centrifugal infiltration has been designed and tested. Such composite pipes are of direct interest with regard to application as advanced heat sinks in highly loaded plasma facing components due to their high thermal conductivity and considerable material strength. Particularly, the approach for the design, analytical calculations, FEM simulations and the detailed design using CAD is presented. [mehr]

Physics model of the ToF-RBS detector and its current status

Wall Forum
[mehr]

Estimation of X-mode reflectometry first fringe frequency using neural networks

Edge Physics Forum
[mehr]

Korrektur von IR-Thermographiedaten mit IR-Volumenemission

Edge Physics Forum
Für den sicheren Betrieb einer Fusionsanlage ist es unerlässlich die Abfuhr der erzeugten Wärme zu kontrollieren und zu charakterisieren. Infrarot Thermographie wird zur Bestimmung der Oberflächentemperatur der Wand und der damit verbundenen Wärmeflüsse benutzt. Dabei wird die Planck Strahlung der Oberfläche mit Sichtlinien durch das Plasma gemessen. Besonders in für zukünftige Reaktoren vorhergesehenen Operationsbereichen mit erhöhter Randdichte wird die Temperaturbestimmung durch vom Plasma emittierte Bremsstrahlung in ASDEX Upgrade erschwert.Diese Bachelorarbeit zeigt, dass anhand der vorhandener Daten eine nachträgliche Korrektur der infrarot Thermographiedaten möglich ist und charakterisiert diese.Dazu werden die Temperaturdaten gefiltert und der Wärmefluss mithilfe des THEODOR Codes neu berechnet.Unterschiedliche Filtermöglichkeiten werden anhand des resultierenden Wärmeflussses charakterisiert. [mehr]

First results on the use of tungsten heavy alloys in the divertor of ASDEX Upgrade

Rehearsal for an invited talk at the ICFRM conference (Aomori, Japan) 2017. [mehr]

On the phase velocity in between weak and strong plasma edge turbulence

Edge Physics Forum
[mehr]

Top launch reflectometer access on AUG

Edge Physics Forum
An introduction the proposed new AUG "top-launch" reflectometer antenna access (upper divertor) - its design, its constraints, and what we hope to try and measure. [mehr]

AAPPS-DPP2018 rehearsal II

ASDEX Upgrade Seminar
[mehr]

Electric currents in the SOL: Role for parallel heat transport and target heat fluxes

Edge Physics Forum
[mehr]

Investigation of Irregular Current Jumps in Hot Cathode Linear Ionization Pressure Gauges in Magnetic Fields

Edge Physics Forum
[mehr]

Investigation of the Structure of the Electron Temperature Profile around the Separatrix with the Thermal Helium Beam Diagnostic at ASDEX Upgrade

Edge Physics Forum
[mehr]
Web-Ansicht
Seite Drucken
Im neuen Fenster öffnen
Geschätzte DIN-A4 Seiten-Breite
Zur Redakteursansicht