Comparison of bounce-averaged quasilinear theory with charge exchange measurements during minority fundamental and majority second harmonic ICRF heating in PLT

1985 ◽  
Author(s):  
G. W. Hammett ◽  
P. L. Colestock ◽  
G. Gammel ◽  
R. J. Goldston ◽  
J. C. Hosea ◽  
...  
Keyword(s):  
Charge Exchange ◽  
Second Harmonic ◽  
Quasilinear Theory ◽  
Icrf Heating

A more general model equation of nonlinear Rayleigh waves and their quasilinear solutions

2016 ◽  
Vol 30 (08) ◽  
pp. 1650096 ◽  
Author(s):  
Shuzeng Zhang ◽  
Xiongbing Li ◽  
Hyunjo Jeong
Keyword(s):  
Rayleigh Waves ◽  
General Equation ◽  
Wave Motion ◽  
Numerical Solutions ◽  
Second Harmonic ◽  
Approximate Equation ◽  
Finite Amplitude ◽  
Sound Beam ◽  
Quasilinear Theory ◽  
Sound Beams

A more general two-dimensional wave motion equation with consideration of attenuation and nonlinearity is proposed to describe propagating nonlinear Rayleigh waves of finite amplitude. Based on the quasilinear theory, the numerical solutions for the sound beams of fundamental and second harmonic waves are constructed with Green’s function method. Compared with solutions from the parabolic approximate equation, results from the general equation have more accuracy in both the near distance of the propagation direction and the far distance of the transverse direction, as quasiplane waves are used and non-paraxial Green’s functions are obtained. It is more effective to obtain the nonlinear Rayleigh sound beam distributions accurately with the proposed general equation and solutions. Brief consideration is given to the measurement of nonlinear parameter using nonlinear Rayleigh waves.

Second harmonic ICRF heating experiments in Tore Supra

2009 ◽  
Author(s):  
R. J. Dumont ◽  
V. Basiuk ◽  
L.-G. Eriksson ◽  
Volodymyr Bobkov ◽  
Jean-Marie Noterdaeme ◽  
...  
Keyword(s):  
Second Harmonic ◽  
Icrf Heating

Experimental study on beam acceleration with combined NBI heating and second-harmonic ICRF heating in JT-60

1991 ◽  
Vol 31 (1) ◽  
pp. 83-92 ◽  
Author(s):  
H. Kimura ◽  
T. Fujii ◽  
K. Tobita ◽  
M. Yamagiwa ◽  
K. Hamamatsu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Second Harmonic ◽  
Icrf Heating

Characteristics of ICRF heating near the second harmonic

1983 ◽  
Vol 23 (12) ◽  
pp. 1613-1623 ◽  
Author(s):  
S.C. Chiu ◽  
T.K. Mau
Keyword(s):  
Second Harmonic ◽  
Icrf Heating

Analysis of charge-exchange spectra during ICRF heating in the JFT-2 tokamak

1984 ◽  
Vol 24 (2) ◽  
pp. 211-218 ◽  
Author(s):  
Y. Miura ◽  
H. Matsumoto ◽  
H. Kimura ◽  
K. Odajima ◽  
M. Mori ◽  
...  
Keyword(s):  
Charge Exchange ◽  
Icrf Heating

First H+ Charge-Exchange Images in the Stim.

1976 ◽  
Vol 34 ◽  
pp. 504-505
Author(s):  
Wm. H. Escovitz ◽  
T. R. Fox ◽  
R. Levi-Setti
Keyword(s):  
Charge Exchange ◽  
Neutral Component ◽  
Channel Electron Multiplier ◽  
Electron Multiplier ◽  
Neutral Particles ◽  
Charged Beam ◽  
Scanning Transmission ◽  
Contrast Mechanism ◽  
Ion Microscopy ◽  
Beam Component

Charge exchange, the neutralization of ions by electron capture as the ions traverse matter, is a well-known phenomenon of atomic physics which is relevant to ion microscopy. In conventional transmission ion microscopes, the neutral component of the beam after it emerges from the specimen cannot be focused. The scanning transmission ion microscope (STIM) enables the detection of this signal to make images. Experiments with a low-resolution 55 kV STIM indicate that the charge-exchange signal provides a new contrast mechanism to detect extremely small amounts of matter. In an early version of charge-exchange detection (fig. 1), a permanent magnet installed between the specimen and the detector (a channel electron multiplier) sweeps the charged beam component away from the detector and allows only the neutrals to reach it. When the magnet is removed, both charged and neutral particles reach the detector.

Giant increase of the second harmonic radiation's absorption during optical poling of oxide glass

2003 ◽  
Vol 50 (8) ◽  
pp. 1237-1244 ◽  
Author(s):  
M. K. Balakirev ◽  
V. A. Smirnov ◽  
L. I. Vostrikova ◽  
I. V. Kityk ◽  
J. Kasperczyk ◽  
...  
Keyword(s):  
Second Harmonic ◽  
Oxide Glass
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