high-electron-density plasmas
Plasma scale-length effects on electron energy spectra in high-irradiance laser plasmas
... Refraction of probing rays along the target surface depends on the electron density gra- dient. Consider a slab of plasma with two rays passing through a distance dz apart. The optical path length ...
23
Behavior of CIII to CVI Emissions during the Recombining Phase of LHD Plasmas
... carbon density is 3 % of the electron ...relatively high-density and high-temperature plasmas in edge ergodic layer in ...with electron density, whereas these are ...
6
Dense GeV electron–positron pairs generated by lasers in near-critical-density plasmas
... NCD plasmas; second, the dense g photons emitted from one NCD plasma collide with the focused counter-propagating laser in the other to initiate the multiple-photon BW ...positron density is as high ...
8
Microinstabilities in high power electron cyclotron heating of plasmas
... Davidson et al (1989) also consider intense beams, but with a much different profile from a Gaussian. They consider the O mode and a tophat profile (not a physically realistic profile as the infinite derivative dE|;/dz ...
211
Numerical Study of Spectral Line Shapes in High-Density He Plasmas
... the electron temperature and density of a plasma, the spectral line intensity ratio of appropriate tran- sitions can be employed with the experimental ratio be- ing compared with a value calculated using a ...
5
Transport analysis of high radiation and high density plasmas in the ASDEX Upgrade tokamak
... The radial radiation distribution of the electromagnetic radiated power is an essential component of the power balance in tokamaks. It will be even more important in fusion reactors where a non-negligible fraction of the ...
9
Temporal and Spatial Variations in Electron Density and Blackbody Temperature in the Initial Phase of a Laser Ablation BN Plasma
... rarefied plasmas, ...plasma density, the continuum component shown in ...a high density, whereas the line emissions may be from the peripheral region that has a rarefied ...
5
Development of the Heating Scenarios to Achieve High-Ion Temperature Plasma in the Large Helical Device
... Although high- energy tangential negative-NBI heating has greatly contributed to extending the plasma parameter regime in LHD, the ion temperature does not increase because the electron heating is dominant ...
9
Plasma scale-length effects on electron energy spectra in high-irradiance laser plasmas
... necessary high laser contrast (>10 11 ) associated with the high ...enable high power laser irradiance onto essentially unperturbed solid target surfaces ...of high-energy electrons, ions, ...
10
Plasma scale-length effects on electron energy spectra in high-irradiance laser plasmas
... Refraction of probing rays along the target surface depends on the electron density gra- dient. Consider a slab of plasma with two rays passing through a distance dz apart. The optical path length ...
22
Collisional transport of trace impurity ions and the role of the radial electric field in spherical tokamak plasmas
... finement in spherical tokamaks, an advanced tokamak design which offers a more compact device than the conventional tokamak, see figure 1.2. In particular we pri- marily focus on the Mega Amp` ere Spherical Tokamak ...
140
A Computational Study of the Decomposition of Carbon Tetrafluoride in Wet Argon under Electron Beam Irradiation
... [Ar ∗ ]. (14) The second term on the right hand side of Eq. (12) corre- sponds to another decomposition reaction, such as electron impact, which is not effective in e-beam generated plas- mas. Therefore, the ...
7
Axisymmetric Eigenmodes of Spheroidal Pure Electron Plasmas
... pure electron plasmas have been studied experi- ...equilibrium density distribution, with the exception of a low-density distribution surrounding the ...
5
The development of electrical plasma diagnostics for HiPIMS discharges
... At low pressures (below 0.53 Pa), a noticeable delay time in the waveform of the HiPIMS discharge current was observed. The delay time, becoming on the same order of time as the HiPIMS pulse width, was found to limit the ...
145
Mass selection in laser-plasma ion accelerator on nanostructured surfaces
... the electron density but more importantly it decreases the pre-plasma electron temperature 25 ...cold electron temperature is expected to scale linearly with the laser intensity 26 ...and ...
9
The effect of high-energy electron beam on drawn and undrawn high density polyethylene fibers
... H DPE monofilaments were obtained using different extruders and drawn by post-extruder equipments. After solidification, drawn and undrawn monofilaments (draw ratio 7:1) were irradiated with 10 MeV electron beams ...
11
Assessment of Plasma Performance in a Magnetic Configuration with Reduced Poloidal Coils for a Helical DEMO Reactor FFHR-d1
... it tends to become saturated at high-beta. This saturation is presumably reflecting the degradation of NB heating ef- ficiency due to the increase of direct loss of fast ions sup- plied by NB injection [12] and/or ...
5
Density Regimes of Complete Detachment and Serpens Mode in LHD
... reduction in the divertor flux is observed at all the mea- sured divertor tiles. However, this complete detachment is transient. It has been shown that complete detachment is observed when the minor radius of the ...
8
Fabrication of 0 346 THz BWO for Plasma Diagnostics
... There are many researches on the UV LIGA for the higher frequencies vacuum devices [13, 14, 15, 16, and 17]. In this paper, the UV-LIGA process starts with the preparation of 4 in diameter oxygen-free copper wafers. The ...
8
ECRH on ASDEX Upgrade - System Status, Feed-Back Control, Plasma Physics Results -
... [17], density profile from interferometry [18], ray-tracing for all ECRH-beams and a correlation analysis of the 60 new fast ECE channels with the n=2 component (for (3,2)-NTMs) or the n=1, m=2 component of the ...
8