Author details

Mikhail Tokar

E Energies of ions and atoms

18 Plasma Science and Technology - Basic Fundamentals and Modern Applications

<sup>0</sup> Fα½ Þ u du

h Distance from duct opening to the mirror

γ h; r<sup>0</sup> ð Þ ; E Flux density of cx atoms onto the mirror

cx Charge exchange rate coefficients

ion Ionization rate coefficients

m Mass of atoms

n Plasma density

dis Molecule dissociation rate coefficient

hsp Mirror erosion rate in nm per full-power year

Γ h; r<sup>0</sup> ð Þ Outflow density of sputtered mirror particles

nm, bs,fc, cx Densities of different neutral species—desorbed

Rcxð Þ x; r; E The generation rate of cx atoms in the energy range

s Cosine of the cx atom incidence angle with respect to the duct axis

cx cx atom source density contributions due to charge

σel Cross section for elastic collisions between cx atoms

Sfc, cx Source densities of fc and cx atom species

νm, <sup>a</sup> Decay frequencies for molecules and atoms

r Distance from the opening axis

Te,i Electron and ion temperatures

r<sup>0</sup> The opening radius

molecules, backscattered atoms, Franck-Condon, and charge exchanged atoms, respectively

E, E þ dE within an infinitesimally thin plasma toroid of the width dr, thickness dx, the radius r, and situated at the distance x from the wall

exchange of primary neutral species and cx atoms

and molecules of hydrogen isotopes

<sup>F</sup>αð Þ� <sup>u</sup> <sup>1</sup>

k a,m

km

k a,m

S<sup>0</sup>,<sup>1</sup>

Ux, <sup>y</sup> � <sup>Ð</sup> x, <sup>y</sup>

<sup>0</sup> νadz

<sup>λ</sup>ð Þ¼ <sup>x</sup>; <sup>E</sup> Ux<sup>=</sup> ffiffiffiffiffiffiffiffiffiffiffiffi

2E=m p

<sup>u</sup> exp �u<sup>2</sup> � <sup>α</sup>

u � �, I<sup>α</sup> � <sup>Ð</sup> <sup>∞</sup>

Address all correspondence to: m.tokar@fz-juelich.de

Institute for Energy and Climate Research – Plasma Physics (IEK-4), FZJ, Jülich, Germany
