Impact of the Upstream Plasma Parameters on the Spectroscopic Measurement in the GAMMA 10/PDX Divertor Simulation Experiments

Yokodo, Takayuki; Nakashima, Y.; Hatayama, A.; Iijima, Takahiro; Islam, Md. Shahinul; Yoshimoto, Tsubasa; Ichimura, Kazuya; Lee, Guanyi; Yamashita, Soichiro; Terakado, A.; Nojiri, Kunpei; Yoshikawa, Masayuki; Kohagura, J.; Ezumi, N.; Sakamoto, M.; Imai, T.

doi:10.1585/pfr.13.3402032

Cited by 1 publication

(2 citation statements)

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“…As seen from Figs. 3 and 4 (b), the Ar impurity ions are transported to the core region and this tendency is reasonably matches with experimental results [11,12]. The neutral Ar impurity particles do not exist in the plug/barrier-cell, because almost all the Ar particles are ionized, when passing through the position under the coil (z∼10 m) where the plasma density and temperature are high.…”

Section: Results Of the Ar Impurity Transportsupporting

confidence: 82%

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Analysis of Ar Impurity Transport in the Large Tandem Mirror Device GAMMA 10/PDX Plasmas

Takechi

Tatsumi

Islam

et al. 2019

Plasma and Fusion Research

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The purpose of this study is to understand the Ar impurity transport process in the GAMMA 10/PDX. In the present study, the initial simulation using LINDA code and IMPGYRO code has been done to establish the basis of further understanding of the Ar impurity transport. The validity of the simulation model has been discussed by comparisons with those by the theoretical estimations of the friction force and the thermal force. The simulation results show that the Ar impurities with Z = 1 are transported towards the core region, since the thermal force dominates over the friction force under the present calculation conditions. The tendency does not contradict the experimental results and is reasonably explained by the theoretical prediction, i.e., the force balance between the thermal force and the friction force. The robust basis for further model validation and understanding of the Ar transport in the GAMMA 10/PDX has been established.

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Section: Results Of the Ar Impurity Transportsupporting

confidence: 82%

“…Regarding the Ar impurity ions with Z = 1, the spatial profiles of Ar density and velocity are reasonably explained by the force balance between the thermal force and the friction force along the magnetic field line. Their tendencies do not contradict experiments [11,12] as well.…”

Section: Summary and Future Plansupporting

confidence: 62%