P. Helander

Publications456
h-index45
Citations7,721
Highly Influential Citations212
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Collisional transport in magnetized plasmas
1. Introduction 2. Kinetic and fluid descriptions of a plasma 3. The collision operator 4. Plasma fluid equations 5. Transport of a cylindrical plasma 6. Particle motion 7. Toroidal plasma 8.…
Theory of plasma confinement in non-axisymmetric magnetic fields.
  • P. Helander
  • Physics
    Reports on progress in physics. Physical Society
  • 21 July 2014
TLDR
The mathematical apparatus to describe stellarator plasmas is developed from first principles and basic elements underlying confinement optimization are introduced.
Chapter 3: MHD stability, operational limits and disruptions
Progress in the area of MHD stability and disruptions, since the publication of the 1999 ITER Physics Basis document (1999 Nucl. Fusion 39 2137-2664), is reviewed. Recent theoretical and experimental…
A simple avalanche model as an analogue for magnetospheric activity
The power law dependence of the power spectrum of auroral indices, and in‐situ magnetic field observations in the earth's geotail, may be evidence that the coupled solar wind‐magnetospheric system…
First measurement of elastic, inelastic and total cross-section at $$\sqrt{s}=13$$s=13 TeV by TOTEM and overview of cross-section data at LHC energies
The TOTEM collaboration has measured the proton–proton total cross section at $$\sqrt{s}=13~\hbox {TeV}$$s=13TeV with a luminosity-independent method. Using dedicated $$\beta ^{*}=90~\hbox…
Damping of relativistic electron beams by synchrotron radiation
Relativistic electrons emit synchrotron radiation due to their gyro- and guiding-center motions in a curved magnetic field. In this article, the kinetic theory of relativistic electron beams is…
Runaway acceleration during magnetic reconnection in tokamaks
In this paper, the basic theory of runaway electron production is reviewed and recent progress is discussed. The mechanisms of primary and secondary generation of runaway electrons are described and…
Runaway electrons and the evolution of the plasma current in tokamak disruptions
After the thermal quench of a tokamak disruption, the plasma current decays and is partly replaced by runaway electrons. A quantitative theory of this process is presented, where the evolution of the…
Stellarator and tokamak plasmas: a comparison
An overview is given of physics differences between stellarators and tokamaks, including magnetohydrodynamic equilibrium, stability, fast-ion physics, plasma rotation, neoclassical and turbulent…
Properties of a new quasi-axisymmetric configuration
A novel, compact, quasi-axisymmetric configuration is presented which exhibits low fast-particle losses and is stable to ideal MHD instabilities. The design has fast-particle loss rates below 8\% for…
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