Projekt

Numerical investigation of parallel transport for different particle species

Udbyder

Vejleder

Sted

København og omegn

In fusion experiments, the scrape-off layer (SOL) function as a transit region, where hot plasma ejected from the edge and core region is transported along the magnetic field lines to the walls. This ejection happens primarily on the outboard midplane of the plasma column in form of hot plasma filaments with a finite parallel length. As these filaments enter the SOL they expand parallel with a velocity comparable to the local sound speed.

The thermal velocity of the individual species is given as; Vt=sqrt(T/m). We notice that electron will have a much large thermal velocity than the ions due to its smaller mass. The faster electrons will thus leave the filaments, leaving behind a positive charge density of ions.  An outwardly directed electric field will thus be generated slowing the electrons and speeding up the ions. If only one ion species is considered the combined ambipolar velocity will thus be; VA =sqrt((Te+3Ti)/mi).

However, difference ion species, like isotopes of hydrogens as well as heavier ions, have different thermal velocities, again due to the difference in masses. The fast electron will here still escape the filaments setting up a positive charge density of ions but now this electrical field will act differently on the difference ion species.

In this project, the students will create a 1-D particle code, and simulate the temporal dynamics of a large number of both electrons and ions, including different ion species. Each particle act under the influence of a combined electrical field created by all particles. Based on realistic parameters from the ASDEX fusion reactor and for a wide combination of different ions, the parallel distribution of the different species should then be determined. 

Forudsætninger

Knowledge of numerical solutions of coupled ordinary as well as partial differential equations.Some knowledge of continuum dynamics, plasma physics, and complex dynamics will be beneficial.

Søg i opslag
Kontakt

Virksomhed/organisation

DTU Fysik

Navn

Anders Henry Nielsen

Stilling

Seniorforsker

Mail

ahnie@fysik.dtu.dk

Vejleder-info

Bachelor i Fysik og Nanoteknologi

Vejleder

Anders Henry Nielsen

Medvejledere

Jens Juul Rasmussen, Matthias Wiesenberger

ECTS-point

15 - 35

Type

Bachelorprojekt, Kandidatspeciale

Kandidatuddannelsen i Fysik og Nanoteknologi

Vejleder

Anders Henry Nielsen

Medvejledere

Jens Juul Rasmussen, Matthias Wiesenberger

ECTS-point

15 - 35

Type

Bachelorprojekt, Kandidatspeciale

OM DTU

DTU er et teknisk eliteuniversitet med international rækkevidde og standard. Vores mission er at udvikle og nyttiggøre naturvidenskab og teknisk videnskab til gavn for samfundet. 10.000 studerende uddanner sig her til fremtiden, og 5.700 medarbejdere har hver dag fokus på uddannelse, forskning, myndighedsrådgivning og innovation, som bidrager til øget vækst og velfærd.

Find os her

Anker Engelunds Vej 1
Bygning 101A
2800 Kgs. Lyngby


45 25 25 25

dtu@dtu.dk

CVR-nr. 30 06 09 46

Liste over EAN Numre

Job på DTU

Se alle jobs
 

loading..