Stability and variations of plasma parameters in the L-2M stellarator during excitation of the induction current in the regime of ECR plasma heating

2008 ◽  
Vol 34 (12) ◽  
pp. 979-990 ◽  
Author(s):  
D. K. Akulina ◽  
G. M. Batanov ◽  
M. S. Berezhetskiĭ ◽  
D. G. Vasil’kov ◽  
I. Yu. Vafin ◽  
...  
Keyword(s):  
Plasma Heating ◽  
Plasma Parameters ◽  
Ecr Plasma ◽  
Induction Current

Measurements of Microwave Power Absorbed during ECR Plasma Heating at the L-2M Stellarator

2019 ◽  
Vol 45 (11) ◽  
pp. 1059-1065
Author(s):  
S. E. Grebenshchikov ◽  
N. K. Kharchev ◽  
D. G. Vasilkov
Keyword(s):  
Microwave Power ◽  
Plasma Heating ◽  
Ecr Plasma

Electron Cyclotron Resonance Heating of Plasma in the Gas Dynamic Trap

2014 ◽  
Vol 9 (2) ◽  
pp. 13-21
Author(s):  
Aleksandr Solomakhin ◽  
Petr Bagryansky ◽  
Yuriy Kovalenko ◽  
Valeriy Savkin ◽  
Dmitriy Yakovlev
Keyword(s):  
Cyclotron Resonance ◽  
Electron Cyclotron Resonance ◽  
Plasma Heating ◽  
Electron Cyclotron ◽  
Electron Cyclotron Resonance Heating ◽  
Total Power ◽  
Plasma Parameters ◽  
Experimental Conditions ◽  
Microwave Beam ◽  
Gas Dynamic

Electron cyclotron resonance plasma heating (ECRH) system has been recently installed on the gas dynamic trap (GDT) magnetic mirror. Two microwave beams are injected into the plasma at an angle of 36° with respect to the machine axis in a form of extraordinary (X) waves which are subsequently absorbed in the first harmonic cyclotron resonance. Each microwave beam is generated by a Buran-A type 450 kW/54.5 GHz gyrotron. The article reports on the first microwave injection experiments with limited total power of 300 kW. Adjustment of experimental conditions and magnetic field reconfiguration resulted in an increased diamagnetic signal, electron temperature and other plasma parameters

scholarly journals On the Spatial Uniformity of the Degree of Ionization in a Helium ECR Plasma Produced under a Simple Cusp Field

Atoms ◽  
2019 ◽  
Vol 7 (2) ◽  
pp. 49
Author(s):  
Akira Ueda ◽  
Taiichi Shikama ◽  
Yohei Iida ◽  
Masahiro Hasuo
Keyword(s):  
Electron Cyclotron Resonance ◽  
Large Degree ◽  
Potential Candidate ◽  
Plasma Parameters ◽  
Degree Of Ionization ◽  
Line Intensities ◽  
Ecr Plasma ◽  
Spatial Uniformity ◽  
Collisional Radiative Model ◽  
Deposition Processes

Production of a plasma that has a large degree of ionization (DOI), volume, and spatial and temporal uniformities is a challenge for the improvement of the performance of plasma-based vapor deposition processes. As a potential candidate for the discharge, we investigate plasma parameters arising in helium electron cyclotron resonance (ECR) discharges due to a simple cusp field. Two-dimensional distributions of helium atom emission-line intensities were measured using spectroscopy with multiple viewing chords and then de-convoluted by Abel inversion. The local plasma parameters, including the atomic density, were evaluated using collisional-radiative model analysis. The DOI calculated from the electron and atomic densities reached up to 35% and, in most of the region inside the ECR surface, it was more than 10%.

A Scanning SXR Spectrometer Used in Experiments on ECR Plasma Heating at the L-2M Stellarator

2018 ◽  
Vol 61 (6) ◽  
pp. 842-848 ◽  
Author(s):  
A. I. Meshcheryakov ◽  
I. Yu. Vafin ◽  
I. A. Grishina
Keyword(s):  
Plasma Heating ◽  
Ecr Plasma

Characteristics of the plasma parameters in the fabrication of microcrystalline silicon thin films using 915 MHz ECR plasma

2006 ◽  
Vol 506-507 ◽  
pp. 485-488 ◽  
Author(s):  
Doan Ha Thang ◽  
K. Sasaki ◽  
H. Muta ◽  
N. Itagaki ◽  
Y. Kawai
Keyword(s):  
Thin Films ◽  
Microcrystalline Silicon ◽  
Plasma Parameters ◽  
Ecr Plasma ◽  
Silicon Thin Films

Characterization of the palladium plasma produced by nanosecond pulsed 532 nm and 1064 nm wavelength lasers

Laser Physics ◽  
2021 ◽  
Vol 32 (2) ◽  
pp. 026002
Author(s):  
M Asif ◽  
U Amin ◽  
Z U Rehman ◽  
R Ali ◽  
H Qayyum
Keyword(s):  
Kinetic Energy ◽  
Electron Temperature ◽  
Electron Density ◽  
Laser Plasma ◽  
Laser Fluence ◽  
Plasma Heating ◽  
Total Charge ◽  
Plasma Parameters ◽  
Wide Range ◽  
532 Nm

Abstract Palladium plasma produced by nanosecond pulsed 532 nm and 1064 nm wavelengths lasers is studied with the help of planer Langmuir probe. The experiment is conducted over a wide range of the laser fluence (1.6–40 J cm−2). The measured time of flight ions distributions are used to infer total charge, kinetic energy of the palladium ions and plasma parameters. Our results indicate that the ion charge produced by both laser wavelengths is an increasing function of the laser fluence. Initially, the ion charge produced by 1064 nm is lower than 532 nm, but it increases at much faster rate with the rise of laser fluence as the inverse bremsstrahlung plasma heating prevails at higher plasma densities. The most probable kinetic energy of the Pd ions produced by 1064 nm wavelength is also lower than that of 532 nm. The time varying plasma electron temperature and electron density are derived from the current–voltage plots of the two plasmas. For both wavelengths, the electron temperature and electron density rapidly climb to a maximum value and then gradually decline with time. However, in case of the 532 nm, the electron temperature and electron density remain consistently high throughout the laser plasma. The results are compared the available literature and discussed by considering surface reflectivity, ablation rate of the Pd target and laser plasma heating. The results presented in this work will provide more insight into the process of laser ablation and can be useful for the development of laser-plasma ion sources.

Characteristics of plasma parameters in N2/Ar ECR plasma for nitridation

2005 ◽  
Vol 200 (1-4) ◽  
pp. 850-854 ◽  
Author(s):  
Hiroshi Muta ◽  
Doan Ha Thang ◽  
Yoshinobu Kawai
Keyword(s):  
Plasma Parameters ◽  
Ecr Plasma
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