Essays about: "plasma vågor"

Showing result 1 - 5 of 10 essays containing the words plasma vågor.

  1. 1. Statistics of Electric and Magnetic Fields at the Earth’s Bow Shock

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Tsz-Kiu Wong-Chan; [2023]
    Keywords : MMS; Earth’s bow shock; Collisionless shocks; Correlation study; statistics; Space; Space plasma physics; MMS; Jordens bogchock; Kollisionsfria chocker; Korrelationsstudie; Statistik; Rymd; Rymdplasmafysik;

    Abstract : The interaction between the solar wind and Earth’s magnetic field creates the Earth’s bow shock. It is an ideal region for space probes like MMS, THEMIS or Clusters to study the collisionless shock phenomenon in space plasma. READ MORE

  3. 2. Comparison of RF Heating in ASDEX Upgrade and ITER

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Axel Blennå; Mark Kalldas; [2022]
    Keywords : Fusion; ASDEX Upgrade; ITER; FEMIC; ICRH; eigenmode; beam; wave absorption;

    Abstract : The increased effects of global warming have been a driving force to further research and develop sustainable energy sources, such as fusion. In this study, two different fusion devices are compared in terms of ion cyclotron resonance heating (ICRH)of plasma. The two devices are the tokamaks ASDEX Upgrade and not yet built ITER. READ MORE

  4. 3. Including Finite Larmor Radius Effects on RF Heating of Fusion Plasmas using Weak-Form Contributions in COMSOL

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Jonas Christ; [2022]
    Keywords : plasma; fusion; RF; radio frequency; IBW; FW; ion Bernstein wave; fast wave; simulation; FEM; finite element method; Taylor; Taylor expansion; COMSOL; MATLAB; FLR; finite larmor radius; magnetized plasma; hot plasma; thermal plasma; plasma; fusion; radiofrekvens; simulation; FEM; finita elementmethod; Taylor; Taylorutveckling; COMSOL; MATLAB; FLR; ändliga Larmorradie-effekter;

    Abstract : In a fusion plasma, the ions have to be heated to reach fusion relevant temperatures. One possibility is to launch an electromagnetic wave in the radio frequency band into the plasma. This wave can resonate with the ions at their cyclotron frequency and hence, the method is called ion cyclotron resonance heating. READ MORE

  5. 4. Čerenkov emission of whistler waves by electron holes

    University essay from Uppsala universitet/Institutionen för fysik och astronomi

    Author : Nedjma Ouahioune; [2021]
    Keywords : Čerenkov; Whistler waves; Resonance; Electron holes; Plasma; Physics; Space Physics; Astronomy; Plasma waves; Instabilities; Čerenkov; visslarvågor; elektromagnetiska vågor; resonans; electron holes; plasma fysisk; rymdfysisk; astronomi; plasma vågor; instabilitet;

    Abstract : Electron holes are positively charged nonlinear structures in which trapped electrons are supported by a positive electrostatic potential. These structure are regularly observed in space and laboratory plasmas by means of diverging bipolar electric field signatures. READ MORE

  6. 5. Modeling of RF Heating in the JET Tokamak

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Emil Söderman; Wilhelm Holmberg; [2021]
    Keywords : fusion; tokamak; ICRH; RF heating; JET;

    Abstract : Fusion reactors need methods to couple externalpower to confined plasmas. Ion cyclotron resonance heating(ICRH) is a method to radiate electromagnetic waves to couplepower to the kinetic motion of gyrating ions in a plasma. In thisreport we study ICRH with regard to the dispersive effects ofthe confined plasma in the JET tokamak. READ MORE