Deuterium temperature, drift velocity, and density measurements in non-Maxwellian plasmas at ASDEX Upgrade

Abstract

 Users may download and print one copy of any publication from the public portal for the purpose of private study or research.  You may not further distribute the material or use it for any profit-making activity or commercial gain  You may freely distribute the URL identifying the publication in the public portal If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.

Progress in modelling fast-ion D-alpha spectra and neutral particle analyzer fluxes using FIDASIM

“…where S is the diagnostic signal, F is the fast-ion distribution function, and X are the chosen phase-space coordinates. The most commonly used and provided by FIDASIM are velocity-space weight functions F (E, p), where E and p are the fast-ion energy and pitch [13]. In addition, more complete orbit weight functions have e.g.…”

Bi-Maxwellian, slowing-down, and ring velocity distributions of fast ions in magnetized plasmas

“…NBI can also heat preferentially in parallel or perpendicular directions. In such cases we can think of a parallel temperature T and a perpendicular temperature T ⊥ in a bi-Maxwellian velocity distribution function [13,[21][22][23][24][25]. The very large perpendicular temperature obtained by ICRF heating is sometimes called the tail temperature.…”

“…But since the bi-Maxwellian is a 2D function, the energy spectrum and the speed distribution do not appear to be directly useful. However, the 1D projection of the bi-Maxwellian is important to understand diagnostics relying on the Doppler shift [25]. The 1D projection of the isotropic Maxwellian was given in section III based on the isotropy of the function.…”

“…Nevertheless, the integrals in equation (33) can be solved analytically for axisymmetric bi-Maxwellians, i.e. bi-Maxwellians without perpendicular drift [25]. Any perpendicular drift can be handled by Galilean transformations.…”

“…Any perpendicular drift can be handled by Galilean transformations. After the Galilean transformations and integration, we find that an arbitrarily drifting bi-Maxwellian has an intuitive 1D projection [25]:…”