Search for dissertations about: "resistive wall instabilities"

Showing result 1 - 5 of 9 swedish dissertations containing the words resistive wall instabilities.

  2. 1. Tearing mode and resistive-wall mode dynamics in the reversed field pinch

    Author : Jenny-Ann Malmberg; KTH; []
    Keywords : Nuclear fusion; Reversed field pinch; Resistive instabilities; Wall locked modes; Tearing modes; Resistive shell modes; Field errors; EXTRAP-T2; EXTRAP-T2R; TPE-RX;

    Abstract : .... READ MORE

  4. 2. Experimental studies of tearing mode and resistive wall mode dynamics in the reversed field pinch configuration

    Author : Jenny-Ann Malmberg; KTH; []
    Keywords : Nuclear fusion; reversed field pinch; resistive wall instabilities; wall locked modes; tearing modes; resistive shell modes; field errors; Extrap T2; Extrap T2R; TPE-RX;

    Abstract : It is relatively straightforward to establish equilibrium inmagnetically confined plasmas, but the plasma is frequentlysucceptible to a variety of instabilities that are driven bythe free energy in the magnetic field or in the pressuregradient. These unstable modes exhibit effects that affect theparticle, momentum and heat confinement properties of theconfiguration. READ MORE

  5. 3. Stabilisation of resistive-wall modes in fusion plasmas

    Author : Demetrio Gregoratto; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; electromagnetic feedback control; Tokamak; resistive-wall mode; reversed field pinch; MHD;

    Abstract : For the success of thermonuclear fusion by magnetic confinement it is important to improve on the stability limits imposed by large-scale magnetohydrodynamics (MHD) instabilities. This thesis focuses on the stabilisation of the "resistive-wall mode" (RWM), an instability which affects high-pressure tokamaks but also Reversed Field Pinches (RFP). READ MORE

  6. 4. Resistive Wall Mode Stability and Control in the Reversed Field Pinch

    Author : Dmitriy Yadikin; Per Brunsell; Mikhail Gryaznevich; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Resistive wall modes; RWM; active control; feedback; MHD modes; Reversed-Field pinch; RFP; intelligent shell; mode control; Electrophysics; Elektrofysik;

    Abstract : Control of MHD instabilities using a conducting wall together with external magnetic fields is an important route to improved performance and reliability in fusion devices. Active control of MHD modes is of interest for both the Advanced Tokamak and the Reversed Field Pinch (RFP) configurations. READ MORE

  7. 5. Impedance and Instabilities in the MAX IV 3 GeV Ring

    Author : Galina Skripka; Lunds universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Collective effects; geometric impedance; resistive wall impedance; wakefields; particle tracking; harmonic cavity;

    Abstract : To ensure the beam with an ultralow emittance and high current the possible effects deteriorating the beam stability must be investigated. When ultrarelativistic particles travel in the vacuum chamber they induce electromagnetic fields which can act back on them and the following particles. READ MORE