Fast-wave ion-cyclotron heating in the Princeton Large Torus

Abstract

Recent experimental results for ICRF heating in PLT are presented. For the two-ion regime in D-H or 3 3 D-He plasmas minority H and He ions are found to absorb the rf power and transfer it to the deuterons and electrons in accordance with Fokker-Planck theory.

Performance study of the TFTR diagnostic neutral beam for active charge exchange measurements

“…Horizontal CENA signal viewing the self-doped slowing-down distribution of the tangential hy drogen DNB in the region of the beam energy;, 80 keV (top). Plasma con ditions: T e (Cn = 1^(0) = 1 keV, n e (0) = 8 x 10 13 cm" 3 , and a = 85 cm. The bottom plot shows the signal enhance ment ratio due to doping of the DNB ion spectra on its own neutral dis tribution.…”

Analysis of a calculation model for a pulsed DF–CO2chemical laser

“…For an input plane of polarization set at 45° with respect to the toroidal field, the output ellipticity is maximum [2][3][4]. Experimentally, the changes in the ellipticity can be measured by letting the output radiation pass through a fixed analyser parallel to or crossed with the input polarization.…”

“…The change of polarization of electromagnetic radiation propagating in a plasma can be used to measure both electron density and magnetic fields [1][2][3][4].…”

“…in view of a multi-channel system. Furthermore, it was shown [2,3] that in tokamak geometry the linear bi-refringence (Cotton-Mouton effect) is only n e -and B;p-dependent, where B T is the known toroidal magnetic field. To achieve the maximum effect, the test wave has to be carefully aligned perpendicular to the toroidal field, with the input plane of polarization at 45° with respect to B T .…”

“…Radio-frequency (RF) heating in the ion cyclotron range of frequencies (ICRF) has been successfully used in tokamak plasmas [1][2][3]. Some of these experiments have taken advantage of the linear mode conversion regime appearing in a two-ion-species plasma [4].…”