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Title: New understanding of poloidal rotation measurements in a tokamak plasma

Abstract

Significant atomic physics corrections to the measured poloidal velocity using charge exchange spectroscopy have been neglected when interpreting impurity poloidal velocity. In the presence of a magnetic field, the gyro motion of the impurity ion along with the finite lifetime of the observed state results in an additional line shift that scales with ion temperature and magnetic field strength. Effects of collisions on the lifetime of excited states, cascades from higher longer-lived n levels, and charge exchange from excited beam neutrals are calculated to determine necessary corrections to the measured poloidal velocity. The accuracy of computed corrections is tested utilizing symmetric upward and downward views from the TFTR poloidal rotation diagnostic.

Authors:
;
Publication Date:
Research Org.:
Princeton Plasma Physics Lab., Princeton, NJ (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
755072
Report Number(s):
PPPL-3447
TRN: US0002328
DOE Contract Number:  
AC02-76CH03073
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 15 May 2000
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; PLASMA DIAGNOSTICS; TFTR TOKAMAK; PLASMA IMPURITIES; ION TEMPERATURE; CORRECTIONS; SPECTROSCOPY; CHARGE EXCHANGE; ION DRIFT

Citation Formats

R.E. Bell, and E.J. Synakowski. New understanding of poloidal rotation measurements in a tokamak plasma. United States: N. p., 2000. Web. doi:10.2172/755072.
R.E. Bell, & E.J. Synakowski. New understanding of poloidal rotation measurements in a tokamak plasma. United States. doi:10.2172/755072.
R.E. Bell, and E.J. Synakowski. Mon . "New understanding of poloidal rotation measurements in a tokamak plasma". United States. doi:10.2172/755072. https://www.osti.gov/servlets/purl/755072.
@article{osti_755072,
title = {New understanding of poloidal rotation measurements in a tokamak plasma},
author = {R.E. Bell and E.J. Synakowski},
abstractNote = {Significant atomic physics corrections to the measured poloidal velocity using charge exchange spectroscopy have been neglected when interpreting impurity poloidal velocity. In the presence of a magnetic field, the gyro motion of the impurity ion along with the finite lifetime of the observed state results in an additional line shift that scales with ion temperature and magnetic field strength. Effects of collisions on the lifetime of excited states, cascades from higher longer-lived n levels, and charge exchange from excited beam neutrals are calculated to determine necessary corrections to the measured poloidal velocity. The accuracy of computed corrections is tested utilizing symmetric upward and downward views from the TFTR poloidal rotation diagnostic.},
doi = {10.2172/755072},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {5}
}