TJ-II:Impurity transport

The transport of impurities has been studied at TJ-II. ^[1] ^[2]

CCD image of ethylene injection from the limiter in H_α light. A silhouette of the limiter shape is seen at the bottom. In the enlarged image, the glow from three embedded Langmuir probes is visible

Impurity injection methods

Laser ablation ^[3] ^[4]
Injection via the limiter ^[5] ^[6]

Analysis methods

Bolometric tomography ^[7] ^[8]

References

↑ K.J. McCarthy et al, Impurity behaviour during externally induced radial electric fields in the TJ-II stellarator, Proc. 14^th International Stellarator Workshop (Greifswald, 2003) P.We14
↑ K.J. McCarthy et al, Comparison of Impurity Transport in Different Magnetic Configurations, Proc. 17^th ITC / 16^th ISHW (Toki, 2007) I-18
↑ B. Zurro et al, Study of impurity transport injected by laser ablation in the TJ-II, Proc. 29^th EPS Conf. Plasma Phys. (Montreux, 2002) ECA Vol. 26B, P5.025
↑ B. Zurro et al, Transport Analysis of Impurities Injected by Laser Ablation in the TJ-II Stellarator, Proc. 30^th EPS Conf. Plasma Phys. (St. Petersburg, 2003) ECA Vol. 27A, P-2.79
↑ I. García-Cortés et al, Fuelling efficiency of hydrocarbons in TJ-II plasmas, J. Nucl. Mat. 337-339 (2005) 441-445
↑ F.L. Tabarés et al, Injection of hydrogen and ethylene at the plasma edge of TJ-II: A comparative study, Proc. 32^nd EPS Conference on Plasma Phys. (Tarragona, 2005), ECA Vol. 29C, P-4.008
↑ B. Zurro et al, Impurity transport and confinement in the TJ-II Stellarator, Proc. 20^th Fusion Energy Conf. (Villamoura, 2004) EX/P6-32
↑ B. Zurro et al, Method to deduce local impurity transport quantities from the evolution of tomographically reconstructed bolometer signals during tracer injection at TJ-II, Rev. Sci. Instrum. 75 (2004) 4231

[1] K.J. McCarthy et al, Impurity behaviour during externally induced radial electric fields in the TJ-II stellarator, Proc. 14^th International Stellarator Workshop (Greifswald, 2003) P.We14

[2] K.J. McCarthy et al, Comparison of Impurity Transport in Different Magnetic Configurations, Proc. 17^th ITC / 16^th ISHW (Toki, 2007) I-18

[3] B. Zurro et al, Study of impurity transport injected by laser ablation in the TJ-II, Proc. 29^th EPS Conf. Plasma Phys. (Montreux, 2002) ECA Vol. 26B, P5.025

[4] B. Zurro et al, Transport Analysis of Impurities Injected by Laser Ablation in the TJ-II Stellarator, Proc. 30^th EPS Conf. Plasma Phys. (St. Petersburg, 2003) ECA Vol. 27A, P-2.79

[5] I. García-Cortés et al, Fuelling efficiency of hydrocarbons in TJ-II plasmas, J. Nucl. Mat. 337-339 (2005) 441-445

[6] F.L. Tabarés et al, Injection of hydrogen and ethylene at the plasma edge of TJ-II: A comparative study, Proc. 32^nd EPS Conference on Plasma Phys. (Tarragona, 2005), ECA Vol. 29C, P-4.008

[7] B. Zurro et al, Impurity transport and confinement in the TJ-II Stellarator, Proc. 20^th Fusion Energy Conf. (Villamoura, 2004) EX/P6-32

[8] B. Zurro et al, Method to deduce local impurity transport quantities from the evolution of tomographically reconstructed bolometer signals during tracer injection at TJ-II, Rev. Sci. Instrum. 75 (2004) 4231

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