Identification of S VIII through S XIV emission lines between 17.5 and 50 nm in a magnetically confined plasma
Abstract
43 spectral emission lines from F-like to Li-like sulphur ions have been identified in the wavelength range from 17.5 to 50 nm in spectra obtained following tracer injection into plasmas created in a magnetically confined plasma device, the stellarator TJ-II. Plasmas created and maintained in this heliac device with electron cyclotron resonance heating achieve central electron temperatures and densities up to 1.5 keV and 8 × 1018 m–3, respectively. Tracer injections were performed with ≤6 × 1016 atoms of sulphur contained within ~300 μm diameter polystyrene capsules, termed tracer encapsulated solid pellets, using a gas propulsion system to achieve velocities between 250 and 450 m s–1. Once ablation of the exterior polystyrene shell by plasma particles is completed, the sulphur is deposited in the plasma core where it is ionized up to S+13 and transported about the plasma. In order to aid line identification, which is made using a number of atomic line emission databases, spectra are collected before and after injection using a 1 m focal length normal incidence spectrometer equipped with a CCD camera. Furthermore, this work is motivated by the need to clearly identify sulphur emission lines in the vacuum ultraviolet range of magnetically confined plasmas, asmore »
- Authors:
-
- CIEMAT, Madrid (Spain)
- National Institute for Fusion Science, Toki (Japan)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE
- Contributing Org.:
- The TJ-II Team
- OSTI Identifier:
- 1465047
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physica Scripta
- Additional Journal Information:
- Journal Volume: 93; Journal Issue: 3; Journal ID: ISSN 0031-8949
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; plasma; sulphur; vacuum ultraviolet; stellarator
Citation Formats
McCarthy, Kieran J., Tamura, N., Combs, Stephen Kirk, Garcia, R., Hernandez Sanchez, J., Navarro, M., Panadero, N., Pastor, I., and Soleto, A. Identification of S VIII through S XIV emission lines between 17.5 and 50 nm in a magnetically confined plasma. United States: N. p., 2018.
Web. doi:10.1088/1402-4896/aaa22c.
McCarthy, Kieran J., Tamura, N., Combs, Stephen Kirk, Garcia, R., Hernandez Sanchez, J., Navarro, M., Panadero, N., Pastor, I., & Soleto, A. Identification of S VIII through S XIV emission lines between 17.5 and 50 nm in a magnetically confined plasma. United States. https://doi.org/10.1088/1402-4896/aaa22c
McCarthy, Kieran J., Tamura, N., Combs, Stephen Kirk, Garcia, R., Hernandez Sanchez, J., Navarro, M., Panadero, N., Pastor, I., and Soleto, A. Mon .
"Identification of S VIII through S XIV emission lines between 17.5 and 50 nm in a magnetically confined plasma". United States. https://doi.org/10.1088/1402-4896/aaa22c. https://www.osti.gov/servlets/purl/1465047.
@article{osti_1465047,
title = {Identification of S VIII through S XIV emission lines between 17.5 and 50 nm in a magnetically confined plasma},
author = {McCarthy, Kieran J. and Tamura, N. and Combs, Stephen Kirk and Garcia, R. and Hernandez Sanchez, J. and Navarro, M. and Panadero, N. and Pastor, I. and Soleto, A.},
abstractNote = {43 spectral emission lines from F-like to Li-like sulphur ions have been identified in the wavelength range from 17.5 to 50 nm in spectra obtained following tracer injection into plasmas created in a magnetically confined plasma device, the stellarator TJ-II. Plasmas created and maintained in this heliac device with electron cyclotron resonance heating achieve central electron temperatures and densities up to 1.5 keV and 8 × 1018 m–3, respectively. Tracer injections were performed with ≤6 × 1016 atoms of sulphur contained within ~300 μm diameter polystyrene capsules, termed tracer encapsulated solid pellets, using a gas propulsion system to achieve velocities between 250 and 450 m s–1. Once ablation of the exterior polystyrene shell by plasma particles is completed, the sulphur is deposited in the plasma core where it is ionized up to S+13 and transported about the plasma. In order to aid line identification, which is made using a number of atomic line emission databases, spectra are collected before and after injection using a 1 m focal length normal incidence spectrometer equipped with a CCD camera. Furthermore, this work is motivated by the need to clearly identify sulphur emission lines in the vacuum ultraviolet range of magnetically confined plasmas, as sulphur x-ray emission lines are regularly observed in both tokamak and stellarator plasmas.},
doi = {10.1088/1402-4896/aaa22c},
journal = {Physica Scripta},
number = 3,
volume = 93,
place = {United States},
year = {Mon Jan 29 00:00:00 EST 2018},
month = {Mon Jan 29 00:00:00 EST 2018}
}
Web of Science
Figures / Tables:
Works referenced in this record:
Spectroscopy
journal, February 2006
- Pospieszczyk, A.
- Fusion Science and Technology, Vol. 49, Issue 2T
On impurity handling in high performance stellarator/heliotron plasmas
journal, April 2009
- Burhenn, R.; Feng, Y.; Ida, K.
- Nuclear Fusion, Vol. 49, Issue 6
Impurity injection experiments on the Alcator C tokamak
journal, December 1982
- Marmar, E. S.; Rice, J. E.; Terry, J. L.
- Nuclear Fusion, Vol. 22, Issue 12
Studying the impurity charge and main ion mass dependence of impurity confinement in ECR-heated TJ-II stellarator
journal, November 2014
- Zurro, B.; Hollmann, E. M.; Baciero, A.
- Plasma Physics and Controlled Fusion, Vol. 56, Issue 12
Impurity Seeding with Dust Injection in Tokamak Edge Plasmas
journal, June 2012
- Smirnov, R. D.; Krasheninnikov, S. I.; Pigarov, A. Yu.
- Contributions to Plasma Physics, Vol. 52, Issue 5-6
Tracer-encapsulated solid pellet injection system
journal, February 2012
- Sudo, Shigeru; Tamura, Naoki
- Review of Scientific Instruments, Vol. 83, Issue 2
Near-infrared spectroscopy for divertor plasma diagnosis and control in DIII-D tokamak
journal, November 2014
- Soukhanovskii, V. A.; McLean, A. G.; Allen, S. L.
- Review of Scientific Instruments, Vol. 85, Issue 11
Observation of Visible and Near-UV M1 Transitions from Highly Charged Kr, Mo and Xe Ions in LHD and its Prospect to Impurity Spectroscopy for D-T Burning Plasmas
journal, January 2007
- Katai, Ryuji; Morita, Shigeru; Goto, Motoshi
- Plasma and Fusion Research, Vol. 2
VUV spectral line emission measurements in the TCABR tokamak
journal, January 2009
- Machida, M.; Daltrini, A. M.; Severo, J. H. F.
- Brazilian Journal of Physics, Vol. 39, Issue 2
High Resolution X-Ray Spectroscopy for Diagnostics of Single Tokamak Discharges
journal, January 1983
- Källne, E.; Källne, J.
- Physica Scripta, Vol. T3
X-ray emission from He-like charge states produced in tokamak plasmas
journal, March 1983
- Källne, E.; Källne, J.; Pradhan, A. K.
- Physical Review A, Vol. 27, Issue 3
The Rydberg series of helium-like Cl, Ar and S and their high- n satellites in tokamak plasmas
journal, May 1999
- Rice, J. E.; Fournier, K. B.; Safronova, U. I.
- New Journal of Physics, Vol. 1
Commissioning and first operation of the pulse-height analysis diagnostic on Wendelstein 7-X stellarator
journal, November 2017
- Krawczyk, Natalia; Biedermann, Christoph; Czarnecka, Agata
- Fusion Engineering and Design, Vol. 123
High temperature outgassing tests on materials used in the DIII-D tokamak
journal, July 2006
- Holtrop, K. L.; Hansink, M. J.
- Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, Vol. 24, Issue 4
Overview of the plasma-surface interaction on limiter surfaces in the startup campaign of Wendelstein 7-X
journal, October 2017
- Winters, V. R.; Brezinsek, S.; Effenberg, F.
- Physica Scripta, Vol. T170
Transport, stability and plasma control studies in the TJ-II stellarator
journal, July 2015
- Sánchez, J.; Alegre, D.; Alonso, A.
- Nuclear Fusion, Vol. 55, Issue 10
Tracer-Encapsulated Solid Pellet (TESPEL) injection system for the TJ-II stellarator
journal, September 2016
- Tamura, N.; McCarthy, K. J.; Hayashi, H.
- Review of Scientific Instruments, Vol. 87, Issue 11
Review: Pellet injection experiments and modelling
journal, July 2007
- Pégourié, B.
- Plasma Physics and Controlled Fusion, Vol. 49, Issue 8
Production and acceleration of tracer encapsulated solid pellets for particle transport diagnostics
journal, September 1998
- Khlopenkov, K. V.; Sudo, S.
- Review of Scientific Instruments, Vol. 69, Issue 9
Results of an experiment relating apparent Doppler ion temperatures with non-thermal velocities in hot-fusion plasmas
journal, July 2003
- McCarthy, K. J.; Zurro, B.; Balbín, R.
- Europhysics Letters (EPL), Vol. 63, Issue 1
The spectrometer of the high-resolution multiposition Thomson scattering diagnostic for TJ-II
journal, July 2003
- Herranz, J.; Castejón, F.; Pastor, I.
- Fusion Engineering and Design, Vol. 65, Issue 4
Plasma fuelling with cryogenic pellets in the stellarator TJ-II
journal, April 2017
- McCarthy, K. J.; Panadero, N.; Velasco, J. L.
- Nuclear Fusion, Vol. 57, Issue 5
Incompressibility of impurity flows in low density TJ-II plasmas and comparison with neoclassical theory
journal, January 2013
- Arévalo, J.; Alonso, J. A.; McCarthy, K. J.
- Nuclear Fusion, Vol. 53, Issue 2
The detection of fast oxygen ions in neutral beam-heated plasmas of the TJ-II stellarator using spectroscopy methods
journal, July 2010
- McCarthy, Kieran J.; Tribaldos, V.; Arévalo, J.
- Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 43, Issue 14
Argon impurity transport studies at Wendelstein 7-X using x-ray imaging spectrometer measurements
journal, June 2017
- Langenberg, A.; Pablant, N. A.; Marchuk, O.
- Nuclear Fusion, Vol. 57, Issue 8
Works referencing / citing this record:
Plasma termination by excess pellet fueling and impurity injection in TJ-II, the Large Helical Device and Wendelstein 7-X
journal, May 2019
- Dinklage, A.; McCarthy, K. J.; Suzuki, C.
- Nuclear Fusion, Vol. 59, Issue 7
Overview of recent TJ-II stellarator results
journal, July 2019
- Ascasíbar, E.; Alba, D.; Alegre, D.
- Nuclear Fusion, Vol. 59, Issue 11
Overview of recent TJ-II stellarator results
text, January 2019
- Ascasíbar, Enrique; Alba, D.; Alegre, Daniel
- ETH Zurich
Figures / Tables found in this record: