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. The 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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