Sökning: "JET tokamak"

Visar resultat 11 - 15 av 37 avhandlingar innehållade orden JET tokamak.

1. 11. Experimental studies of materials migration in magnetic confinement fusion devices : Novel methods for measurement of macro particle migration, transport of atomic impurities and characterization of exposed surfaces

   Författare :Igor Bykov; Henric Bergsåker; Matej Mayer; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fusion; tokamak; RFP; divertor; limiter; SOL; transport; migration; surface analysis; IBA; ion micro beam; beryllium; tritium; Physics; Fysik;

   Sammanfattning : During several decades of research and development in the field of Magnetically Confined Fusion (MCF) the preferred selection of materials for Plasma Facing Components (PFC) has changed repeatedly. Without doubt, endurance of the first wall will decide research availability and lifespan of the first International Thermonuclear Research Reactor (ITER). LÄS MER

3. 12. The role of magnetic perturbations in runaway electron and sawtooth dynamics

   Författare :Gergely Papp; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; magnetic perturbation; fusion plasma physics; runaway mitigation; sawtooth oscillation; tokamak; runaway electrons;

   Sammanfattning : As the world's fusion energy program is increasingly focused towards burning plasma experiments, it is important to address the remaining theoretical issues. In this thesis we focus on the effect of magnetic perturbations on the radial plasma transport. LÄS MER

4. 13. Simulation of runaway electron generation during plasma shutdown by impurity injection

   Författare :Tamás Fehér; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; disruption mitigation; fusion plasma physics; impurity injection; runaway electron; tokamak;

   Sammanfattning : Disruptions are dangerous instabilities in tokamaks that should be avoided or mitigated. One possible disruption mitigation method is to inject impurities into the plasma to shut it down in a controlled way. Runaway Electrons (REs) can be generated after the plasma is cooled down bythe impurities and these electrons can damage the tokamak. LÄS MER

5. 14. Bayesian Inference for Microwave Diagnostics at Joint European Torus

   Författare :Stefan Schmuck; Per Brunsell; Thomas Jonsson; Jakob Svensson; Laurie Porte; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ECE; Bayesian; Fourier transform; spectroscopy; joint inference; length-scale; Gaussian process; microwave diagnostic; JET; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : The major goal of this thesis is to perform Bayesian inference jointly for electron kinetic profiles, a toroidal magnetic field correction, diagnostic sensitivities, and wall reflection properties given noisy measurements of four microwave diagnostics at the tokamak JET. Besides the measurements, this kind of inference considers prior knowledge, like profile length-scales, to update objectively the information about the physics parameters. LÄS MER

7. 15. The development of a spectrometer for 14 MeV neutrons from fusion

   Författare :Dan Aronsson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; neutron spectrometer; plasma diagnostics; time-of-flight spectrometer; associated particle spectrometer; Neutron detection; proton detection; fusion reactor instrumentation; JET tokamak; proton recoil detector;

   Sammanfattning : .... LÄS MER