Results 171 to 180 of about 30,961 (212)
Some of the next articles are maybe not open access.
Ion cyclotron emission on the Tokamak Fusion Test Reactor
Review of Scientific Instruments, 1995Preliminary observations of ion cyclotron emission (ICE) have been made in D-T plasmas on the Tokamak Fusion Test Reactor, using an array of seven rf probes located at the top and bottom of the torus. Fusion product line emission has been identified, and appears to originate at the low field equatorial plane, near the radius of the outboard limiter ...
Richard Majeski
exaly +2 more sources
Ion cyclotron emission spectroscopy as an α‐particle monitor
Review of Scientific Instruments, 1988Since 1981, we have proposed and investigated spectral analysis of the harmonics of ion cyclotron emission (ICE) as a means of monitoring the energy content of α particles confined in a magnetic fusion device. A pair of crown probe antennas have been constructed for TFTR to collect ICE spectra and will be installed on that device in the near future ...
K. G. Moses +3 more
exaly +2 more sources
Electron Cyclotron Emission Imaging of Electron Cyclotron Resonance Ion Source Plasmas
2022A new imaging system for Electron Cyclotron Resonance Ion Sources (ECRIS) has been designed and is being built. This K- and Ka-band camera will extract localized measurements of absolute energy and relative number density for ECRIS plasma electrons by imaging their Electron Cyclotron Emission (ECE) spectra, as the frequency, shape, and strength of the ...
Henderson, Lawrence +3 more
openaire +1 more source
Ion cyclotron emission driven by axis-encircling energetic ions
Physics of Plasmas, 2019Due to the large gyro-radius, most of the confined fusion products in modern medium-size tokamaks and beam ions in small tokamaks encircle the magnetic axis during the significant part of the drift orbit. As a result, a specific population of particles arises, which is characterized by strong density peaking due to equilibrium distribution in velocity ...
V. S. Marchenko, S. N. Reznik
openaire +1 more source
On ion cyclotron emission in toroidal plasmas
Nuclear Fusion, 2006A detailed study of ion cyclotron interactions in a toroidal plasma has been carried out in order to elucidate the role of toroidal effects on ion cyclotron emission. It is well known that non-relaxed distribution functions can give rise to excitation of magnetosonic waves by ion cyclotron interactions when the distribution function increases with ...
T Hellsten +4 more
openaire +1 more source
Mode structure measurements of ion cyclotron emission and sub-cyclotron modes on DIII-D
Nuclear Fusion, 2022Abstract We report mode structure measurements of coherent ion cyclotron emission (ICE) and sub-cyclotron modes on DIII-D. Through a dedicated experiment, we aimed to characterize a variety of modes via the upgraded ICE diagnostic in both L- and H-mode plasmas.
G.H. DeGrandchamp +7 more
openaire +1 more source
Sawtooth oscillations in ion cyclotron emission from JET
Nuclear Fusion, 1989During ohmically heated high current deuterium discharges in JET, inverted sawtooth oscillations in the superthermal ion cyclotron emission (ICE) have been detected which cannot be accounted for by fluctuations in the antenna-plasma coupling efficiency.
P. Schild, G.A. Cottrell, R.O. Dendy
openaire +1 more source
Ion Cyclotron Emission from JET D-T Plasmas
Physical Review Letters, 1999Ion cyclotron emission (ICE) excited by collective instability of fusion $\ensuremath{\alpha}$ particles has been observed during deuterium-tritium experiments with radio-frequency heating and neutral beam injection (NBI) in the Joint European Torus. A model based on classical $\ensuremath{\alpha}$-particle confinement is broadly consistent with this ...
K. G. McClements +3 more
openaire +1 more source
Characterization of the fast ions distribution from ion cyclotron emission measurements
AIP Conference Proceedings, 2014The ion cyclotron emission (ICE) is triggered by the free energy from an anisotropic distribution of fast ions in cyclotron resonance with plasma waves. Several theories have been developed in the hope of using the spectrum featured by this emission to extract information on the fast ion population [3], but the strong coupling between the fast ions ...
D'Inca, R., Noterdaeme, J.
openaire +3 more sources