Temperature and impurity transport studies of heated tokamak plasmas by means of a collisional-radiative model of x-ray emission fromMo30+toMo39+

2000 ◽  
Vol 61 (5) ◽  
pp. 5701-5709 ◽  
Author(s):  
D. Pacella ◽  
K. B. Fournier ◽  
M. Zerbini ◽  
M. Finkenthal ◽  
M. Mattioli ◽  
...  
Keyword(s):  
Tokamak Plasmas ◽  
X Ray ◽  
Transport Studies ◽  
Impurity Transport ◽  
Collisional Radiative Model ◽  
Radiative Model

scholarly journals Theoretical Modeling of High-Resolution X-ray Spectra Emitted by Tungsten and Molybdenum Ions from Tokamak Plasmas

2020 ◽  
Vol 39 (5) ◽  
pp. 194-201
Author(s):  
Ł. Syrocki ◽  
K. Słabkowska ◽  
E. Węder ◽  
M. Polasik ◽  
J. Rzadkiewicz
Keyword(s):  
High Temperature ◽  
High Resolution ◽  
Detailed Analysis ◽  
Electron Density ◽  
Wavelength Range ◽  
Tokamak Plasmas ◽  
Temperature Plasma ◽  
X Ray ◽  
Collisional Radiative Model ◽  
Radiative Model

AbstractIn order to allow the advanced interpretation of the X-ray spectra registered by the high-resolution crystal KX1 spectrometer on the JET with an ITER-like wall, especially to determine how the relative emission contributions of tungsten and molybdenum ions change during a JET discharge, the X-ray spectra have been carefully modeled over a narrow wavelength range. The simulations have been done in the framework of Collisional–Radiative model implemented in Flexible Atomic Code for an electron density (ne = 2.5 × 1019 m−3), and electron temperatures between Te = 3.0 keV and Te = 4.5 keV, typical for JET. Moreover, performed detailed analysis in the framework of the proposed procedure can be useful in determining temperature of a high temperature plasma generated in tokamaks.

Diagnostics of Gold Laser Plasmas

1988 ◽  
Vol 102 ◽  
pp. 357-360
Author(s):  
J.C. Gauthier ◽  
J.P. Geindre ◽  
P. Monier ◽  
C. Chenais-Popovics ◽  
N. Tragin ◽  
...  
Keyword(s):  
Experimental Results ◽  
Pure Gold ◽  
Electronic Temperature ◽  
X Ray ◽  
Laser Plasmas ◽  
Collisional Radiative Model ◽  
Radiative Model

AbstractIn order to achieve a nickel-like X ray laser scheme we need a tool to determine the parameters which characterise the high-Z plasma. The aim of this work is to study gold laser plasmas and to compare experimental results to a collisional-radiative model which describes nickel-like ions. The electronic temperature and density are measured by the emission of an aluminium tracer. They are compared to the predictions of the nickel-like model for pure gold. The results show that the density and temperature can be estimated in a pure gold plasma.

Time Dependent Collisional-Radiative Model for Scrape-Off Layer Impurity Turbulent Transport Studies

2014 ◽  
Vol 54 (4-6) ◽  
pp. 580-584 ◽  
Author(s):  
F. Guzmán ◽  
Y. Marandet ◽  
D. Moulton ◽  
R. Futtersack ◽  
Ph. Ghendrih ◽  
...  
Keyword(s):  
Turbulent Transport ◽  
Time Dependent ◽  
Transport Studies ◽  
Collisional Radiative Model ◽  
Radiative Model

scholarly journals Impurity transport studies at Wendelstein 7-X by means of x-ray imaging spectrometer measurements

2018 ◽  
Vol 61 (1) ◽  
pp. 014030 ◽  
Author(s):  
A Langenberg ◽  
F Warmer ◽  
G Fuchert ◽  
O Marchuk ◽  
A Dinklage ◽  
...  
Keyword(s):  
Imaging Spectrometer ◽  
X Ray ◽  
Transport Studies ◽  
Impurity Transport ◽  
X Ray Imaging

scholarly journals Simulation of dense aluminum plasma under intense X-rays

2021 ◽  
pp. 1-15
Author(s):  
Dmitrii Andreevich Kim ◽  
Ilia Yurievich Vichev ◽  
Anna Dmitrievna Solomyannaya ◽  
Alexander Sergeevich Grushin
Keyword(s):  
Emission Spectrum ◽  
Free Electron ◽  
Free Electron Laser ◽  
Aluminum Film ◽  
X Rays ◽  
Main Attention ◽  
X Ray ◽  
Aluminum Plasma ◽  
Collisional Radiative Model ◽  
Radiative Model

The THERMOS code was used to calculate the properties of dense photoionized aluminum plasma. The case is based on an experiment carried out at the LCLS, where an aluminum film was irradiated with intense X-ray radiation with a photon energy of 1650 eV using a free-electron laser. The evolution of the aluminum plasma was considered, the populations of states and the emission spectrum were calculated. The main attention was paid to the study of the effects associated with nonstationarity and ionization potentials depression due to high density using collisional-radiative model.

X-ray Ross filter method for impurity transport studies on DIII-D (abstract)

2001 ◽  
Vol 72 (1) ◽  
pp. 1192-1192 ◽  
Author(s):  
I. N. Bogatu ◽  
J. S. Kim ◽  
D. H. Egdell ◽  
R. T. Snider ◽  
N. H. Brooks ◽  
...  
Keyword(s):  
Filter Method ◽  
X Ray ◽  
Transport Studies ◽  
Impurity Transport

scholarly journals Optimization study of a photoionization experiment of a laser-produced He-like plasma by an X-ray source

1992 ◽  
Vol 10 (4) ◽  
pp. 793-799 ◽  
Author(s):  
C. A. Back ◽  
P. Renaudin ◽  
C. Chenais-Popovics ◽  
J. C. Gauthier
Keyword(s):  
Ground State ◽  
Optimal Temperature ◽  
Hydrodynamic Models ◽  
Optimum Time ◽  
X Ray ◽  
Band Emission ◽  
Optimization Study ◽  
Aluminum Plasma ◽  
Collisional Radiative Model ◽  
Radiative Model

A study of the effects of photoionization of a laser-produced plasma has been carried out by modeling the fluorescence of resonance lines due to cascades. The photoionization source is the X-ray M-band emission of a laser-produced high-Z plasma and it perturbs a ground state He-like aluminum plasma. Simulations have been performed to study the conditions necessary to maximize the fluorescence and guide future experiments. A collisional-radiative model is used to determine the optimal temperature and density of the pumped plasma, while hydrodynamic models are used to produce realistic plasma gradients and explore the optimum time delay of the photopumping.

scholarly journals Time-Resolved Spectra in the 5–330 Å Region Emitted from the PLT and TFTR Tokamak Plasmas

1984 ◽  
Vol 86 ◽  
pp. 171-174
Author(s):  
J.L. Schwob ◽  
A.W. Wouters ◽  
S. Suckewer ◽  
F.P. Boody ◽  
M. Finkenthal
Keyword(s):  
Particle Transport ◽  
Spectral Lines ◽  
Tokamak Plasmas ◽  
Time Resolved ◽  
X Ray ◽  
Radiation Losses ◽  
Transport Studies ◽  
Resonance Transitions ◽  
Metallic Impurities ◽  
Multichannel Spectrometer

The analysis of impurity radiation from Tokamak plasmas is one of the most important diagnostics, allowing the measurement of the impurity concentrations, radiation losses and particle transport studies. This study requires simultaneous time-resolved observation of spectral lines from many ionization states for each element. The most intense and important lines are the He and H-like resonance transitions of Oxygen and Carbon and Δn = 0, 1 transitions of highly ionized metallic impurities. These emmissions have been recorded on PLT and TFTR tokamaks by means of a soft X-ray multichannel spectrometer (SOXMOS).

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