Interface Current Integral Transport Methods for the Calculation of Neutral Atom Transport in the Edge Region of Fusion Plasmas

2001 ◽  
Vol 40 (1) ◽  
pp. 66-78 ◽  
Author(s):  
Weston M. Stacey ◽  
John Mandrekas ◽  
Robert Rubilar
Keyword(s):  
Neutral Atom ◽  
Fusion Plasmas ◽  
Edge Region ◽  
Integral Transport

Neutral atom temperature and flow measurements in the edge region of the Alcator C-mod tokamak

2001 ◽  
Vol 8 (4) ◽  
pp. 1253 ◽  
Author(s):  
B. L. Welch ◽  
J. L. Weaver ◽  
H. R. Griem ◽  
W. A. Noonan ◽  
J. Terry ◽  
...  
Keyword(s):  
Neutral Atom ◽  
Edge Region ◽  
Flow Measurements ◽  
Atom Temperature

scholarly journals Application of diffusion theory to neutral atom transport in fusion plasmas

1987 ◽  
Vol 27 (1) ◽  
pp. 117-127 ◽  
Author(s):  
M.Z. Hasan ◽  
R.W. Conn ◽  
G.C. Pomraning
Keyword(s):  
Neutral Atom ◽  
Diffusion Theory ◽  
Fusion Plasmas

scholarly journals Diffraction of radio frequency waves by spatially modulated interfaces in the plasma edge in tokamaks

2019 ◽  
Vol 85 (3) ◽  
Author(s):  
A. D. Papadopoulos ◽  
E. N. Glytsis ◽  
A. K. Ram ◽  
S. I. Valvis ◽  
P. Papagiannis ◽  
...  
Keyword(s):  
Plane Wave ◽  
Radio Frequency ◽  
Density Fluctuations ◽  
Fusion Plasmas ◽  
Plasma Edge ◽  
Edge Region ◽  
Profile Control ◽  
Spatially Periodic ◽  
Magnetized Cold Plasma ◽  
Random Fluctuations

The use of radio frequency (RF) waves in fusion plasmas for heating, for non-inductive current generation, for profile control and for diagnostics has been well established. The RF waves, excited by antenna structures placed near the wall of a fusion device, have to propagate through density fluctuations at the plasma edge. These fluctuations can modify the properties of the RF waves that propagate towards the core of the plasma. A full-wave electromagnetic computational code ScaRF based on the finite difference frequency domain (FDFD) method has been developed to study the effect of density turbulence on RF waves. The anisotropic plasma permittivity used in the scattering studies is that for a magnetized, cold plasma. The code is used to study the propagation of an RF plane wave through a modulated, spatially periodic density interface. Such an interface could arise in the edge region due to magnetohydrodynamic instability or drift waves. The frequency of the plane wave is taken to be in the range of the electron cyclotron frequency. The scattering analysis is applicable to ITER-like plasmas, as well as to plasmas in medium sized tokamaks such as TCV, ASDEX-U and DIII-D. The effect of different density contrasts across the interface and of different spatial modulations are discussed. While ScaRF is used to study a periodic density fluctuation, the code is general enough to include different varieties of density fluctuations in the edge region – such as blobs and filaments, and spatially random fluctuations.

Longitudinal distribution of total ozone content in edge region of antarctic stratospheric vortex

2005 ◽  
Vol 11 (5-6) ◽  
pp. 5-11
Author(s):  
A.V. Grytsai ◽  
◽  
O.M. Evtushevsky ◽  
G.P. Milinevsky ◽  
Z.I. Grytsai ◽  
...  
Keyword(s):  
Total Ozone ◽  
Ozone Content ◽  
Longitudinal Distribution ◽  
Total Ozone Content ◽  
Edge Region

ROI Based Post Image Quality Assessment Technique on Multiple Localized Filtering Method On Kinect HD Sensor Mobile Robot

2018 ◽  
Vol 3 (2) ◽  
pp. 145
Author(s):  
Kholilatul Wardani ◽  
Aditya Kurniawan
Keyword(s):  
Image Quality ◽  
Quality Assessment ◽  
Image Quality Assessment ◽  
Similarity Index ◽  
Assessment Model ◽  
Sensor Data ◽  
Edge Region ◽  
Kinect Sensor ◽  
Image Region ◽  
Filtering Technique

 The ROI (Region of Interest) Image Quality Assessment is an image quality assessment model based on the SSI (Structural Similarity Index) index used in the specific image region desired to be assessed. Output assessmen value used by this image assessment model is 1 which means identical and -1 which means not identical. Assessment model of ROI Quality Assessment in this research is used to measure image quality on Kinect sensor capture result used in Mobile HD Robot after applied Multiple Localized Filtering Technique. The filter is applied to each capture sensor depth result on Kinect, with the aim to eliminate structural noise that occurs in the Kinect sensor. Assessment is done by comparing image quality before filter and after filter applied to certain region. The kinect sensor will be conditioned to capture a square black object measuring 10cm x 10cm perpendicular to a homogeneous background (white with RGB code 255,255,255). The results of kinect sensor data will be taken through EWRF 3022 by visual basic 6.0 program periodically 10 times each session with frequency 1 time per minute. The results of this trial show the same similar index (value 1: identical) in the luminance, contrast, and structural section of the edge region or edge region of the specimen. The value indicates that the Multiple Localized Filtering Technique applied to the noise generated by the Kinect sensor, based on the ROI Image Quality Assessment model has no effect on the image quality generated by the sensor.

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