Sökning: "Thomas johnson"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden Thomas johnson.

  1. 1. Fast wave heating of cyclotron resonant ions in tokamaks

    Författare :Thomas Johnson; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; Fusion plasma; tokamak; RF heating; fast wave heating; fast wave current drive; ion cyclotron resonance; ICRH; ICRF; ICCD; RF induced rotation; RF induced transport; RF induced pinch; RF pinch; finite orbit width; fast wave current drive; self-consi; Engineering physics; Teknisk fysik;

    Sammanfattning : .... LÄS MER

  2. 2. Numerical solution of quasilinear kinetic diffusion equations in toroidal plasmas

    Författare :Lars Josef Höök; Torbjörn Hellsten; Thomas Johnson; Jukka Heikkinen; KTH; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : One of the main challenges for the realization of a working fusion power plant is an increased detailed understanding of kinetic phenomena in toroidal plasmas. The tokamak is a toroidal, magnetically confined plasma device and is currently the main line towards a power plant. LÄS MER

  3. 3. Variance reduction methods for numerical solution of plasma kinetic diffusion

    Författare :Lars Josef Höök; Torbjörn Hellsten; Thomas Johnson; Lars-Göran Ericsson; KTH; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; variance reduction; Monte Carlo; quasi-Monte Carlo; kinetic diffusion; stochastic differential equation;

    Sammanfattning : Performing detailed simulations of plasma kinetic diffusion is a challenging task and currently requires the largest computational facilities in the world. The reason for this is that, the physics in a confined heated plasma occur on a broad range of temporal and spatial scales. LÄS MER

  4. 4. En dyster parentes – opiatregeln i svensk LARO-behandling 2010–2016

    Författare :Bodil Monwell; Arne Gerdner; Björn Johnson; Per Bülow; Thomas Clausen; Högskolan i Jönköping; []
    Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; opiates; opioids; opioid maintenance treatment; methadone; buprenorphine; regulation; National Board of Health and Welfare; opiater; opioider; opioidberoende; buprenorfin; metadon; läkemedelsassisterad behandling; föreskrift; Socialstyrelsen;

    Sammanfattning : Opioids are well documented to arouse euphoria, relieve pain, and to have a high dependency potential. Opioid dependence is a serious chronic condition with a high risk of extensive worsened health, relapse and premature death.Opioid maintenance treatment (OMT) is well researched and has strong scientific support. LÄS MER

  5. 5. The dynamics of Alfvén eigenmodes excited by energetic ions in toroidal plasmas

    Författare :Emmi Tholerus; Thomas Johnson; Torbjörn Hellsten; Duarte Borba; KTH; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Fusion plasma physics; Tokamak; Wave–particle interactions; Toroidal Alfvén eigenmodes; Bump-on-tail instabilities; Magnetohydrodynamics; Nonlinear dynamics; Quasilinear dynamics; Hamiltonian mechanics; Monte Carlo method; ICRH; FWCD; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : The future fusion power plants that are based on magnetic confinement will deal with plasmas that inevitably contain energetic (non-thermal) particles. These particles come, for instance, from fusion reactions or from external heating of the plasma. LÄS MER