Impurity ion temperature and toroidal rotation velocity in JET from high‐resolution x‐ray and XUV spectroscopy

1988 ◽  
Vol 64 (7) ◽  
pp. 3345-3352 ◽  
Author(s):  
M. Mattioli ◽  
J. Ramette ◽  
B. Saoutic ◽  
B. Denne ◽  
E. Källne ◽  
...  
Keyword(s):  
High Resolution ◽  
Rotation Velocity ◽  
Ion Temperature ◽  
X Ray ◽  
Toroidal Rotation ◽  
Xuv Spectroscopy ◽  
Impurity Ion

scholarly journals Poloidal Rotation and Edge Ion Temperature Measurements Using Spectroscopy Diagnostic on Aditya-U Tokamak

Atoms ◽  
2019 ◽  
Vol 7 (3) ◽  
pp. 93
Author(s):  
Gaurav Shukla ◽  
Malay B. Chowdhuri ◽  
Kajal Shah ◽  
Nandini Yadava ◽  
Ranjana Manchanda ◽  
...  
Keyword(s):  
High Resolution ◽  
Line Emission ◽  
Rotation Velocity ◽  
Spectral Lines ◽  
Tokamak Plasma ◽  
Vacuum Vessel ◽  
Ion Temperature ◽  
Minor Radius ◽  
Impurity Ion ◽  
Poloidal Rotation

The impurity ion poloidal rotation and ion temperature from the Aditya-U tokamak plasma have been measured using a high-resolution spectroscopic diagnostic. It comprises of a high resolution, 1 m, f/8.7, Czerny-Turner configuration spectrometer along with charge coupled device (CCD) detector. The system monitors the spectral line emission of C2+ impurity ions at 464.74 nm from the top port of the Aditya-U vacuum vessel with the lines of sight covering the plasma minor radius from r = 11.55 cm to 21.55 cm. The impurity ion poloidal rotation velocity and temperature have been estimated using the Doppler shift and Doppler broadening of the spectral lines respectively. The maximum poloidal rotation at a radial location of 21.55 cm in the edge of the plasma during the plasma current flat top was observed to be ~4 km/s for the analyzed discharges and the ion temperatures measured in the edge were in the range of 32–40 eV.

High Resolution X-Ray Spectroscopy at Jet

1988 ◽  
Vol 102 ◽  
pp. 283-291
Author(s):  
R. Giannella
Keyword(s):  
High Resolution ◽  
Rotation Velocity ◽  
Jet Physics ◽  
Main Task ◽  
Ion Temperature ◽  
Operational Parameters ◽  
X Ray ◽  
Operational Capabilities ◽  
The One ◽  
And Shifts

AbstractA high resolution X-ray crystal spectrometer was installed at JET in 1986. The main task of this instrument, designed and built by the ENEA Frascati Laboratory in collaboration with JET, is the measurement of the ion temperature and rotation velocity from Doppler broadenings and shifts. Stringent operation requirements considerably conditioned its versatility as a survey instrument or a tool for fundamental research. The unique conditions of the JET plasmas, however, allowed to observe in high resolution and identify lines from the highest ionization stages (B-like to H-like) of nickel in the vicinity of the resonance transitions of the one- and two-electron systems of this element. These spectra and their relevance to the study of JET physics are briefly presented. The comparison with atomic physics theoretical computations of He-like and H-like ions spectra observed at JET is also shortly presented. The most intense among these lines could regularly be monitored with adequate time resolution as to allow the production of an extensive data base. The experimental spectra are simulated by integrating the theoretical ones along the spectrograph line of sight across the plasma. Ion temperature as well as rotation velocity measurements in ohmic plasmas and additionally heated ones are discussed and their relationship with other physical quantities and operational parameters are shortly reviewed. Details of the spectrometer design, its lay-out on the JET site and its operational capabilities are also given.

Characteristic peaked profiles of ion temperature and toroidal rotation velocity in JT-60 hot ion modes

1993 ◽  
Vol 33 (2) ◽  
pp. 251-261 ◽  
Author(s):  
Y Koide ◽  
S Ishida ◽  
A Sakasai ◽  
H Shirai ◽  
T Hirayama ◽  
...  
Keyword(s):  
Rotation Velocity ◽  
Ion Temperature ◽  
Toroidal Rotation

High-resolution XUV spectroscopy of x-ray laser plasmas

1992 ◽  
Author(s):  
Jeffrey A. Koch ◽  
Phillip J. Batson ◽  
Michael R. Carter ◽  
Karen L. Chapman ◽  
Luiz B. Da Silva ◽  
...  
Keyword(s):  
High Resolution ◽  
X Ray ◽  
Laser Plasmas ◽  
Xuv Spectroscopy

scholarly journals High-resolution spectroscopy diagnostics for measuring impurity ion temperature and velocity on the COMPASS tokamak

2015 ◽  
Vol 96-97 ◽  
pp. 1006-1011 ◽  
Author(s):  
Vladimir Weinzettl ◽  
Gaurav Shukla ◽  
Joydeep Ghosh ◽  
Radek Melich ◽  
Radomir Panek ◽  
...  
Keyword(s):  
High Resolution ◽  
High Resolution Spectroscopy ◽  
Ion Temperature ◽  
Impurity Ion

scholarly journals Development of a spatially resolving x-ray crystal spectrometer for measurement of ion-temperature (Ti) and rotation-velocity (v) profiles in ITER

2010 ◽  
Vol 81 (10) ◽  
pp. 10E322 ◽  
Author(s):  
K. W. Hill ◽  
M. Bitter ◽  
L. Delgado-Aparicio ◽  
D. Johnson ◽  
R. Feder ◽  
...  
Keyword(s):  
Rotation Velocity ◽  
Ion Temperature ◽  
Crystal Spectrometer ◽  
X Ray
Sign in / Sign up

Export Citation Format

Share Document