Space- and time-resolved study of impurities by visible spectroscopy in the high-density regime of JIPP T-II tokamak plasma
- 1 February 1980
- journal article
- letter
- Published by IOP Publishing in Nuclear Fusion
- Vol. 20 (2) , 209-212
- https://doi.org/10.1088/0029-5515/20/2/010
Abstract
Time-resolved spatial profiles of Zeff in JIPP T-II tokamak plasmas have been determined from the measurement of bremsstrahlung in the visible spectral region. The effective ion charge Zeff increases at the plasma centre and decreases at the plasma periphery in the high-electron-density regime. The emissions from low ionization states of light impurities increase notably in the region of lower electron temperatures in this regime. As a result, impurities accumulate in the plasma centre in the high-density regime. The results obtained with respect to the plasma periphery support the interpretation of the behaviour of the impurities, which is based on VUV spectroscopic studies.Keywords
This publication has 4 references indexed in Scilit:
- Line radiation in the visible and in the ultraviolet in TFR tokamak plasmasNuclear Fusion, 1975
- Thermal X-ray spectra and impurities in the ST TokamakNuclear Fusion, 1975
- Electron Radiative Transitions in a Coulomb Field.The Astrophysical Journal Supplement Series, 1961
- Kontinuierliche SpektrenPublished by Springer Nature ,1957