Study of heat and particle flux in the case of gas injection in the D-Module of GAMMA 10/PDX

Md Shahinul Islam; Yousuke Nakashima; Hiroto Matsuura; Kazuya Ichimura; Md Maidul Islam; Keita Shimizu; Kazuma Fukui; Masato Ohuchi; Kunpei Nojiri; Akihiro Terakado; Naomichi Ezumi; Mizuki Sakamoto; Tsuyoshi Imai

doi:10.1585/pfr.11.2402042

Study of heat and particle flux in the case of gas injection in the D-Module of GAMMA 10/PDX

Md Shahinul Islam, Yousuke Nakashima, Hiroto Matsuura, Kazuya Ichimura, Md Maidul Islam, Keita Shimizu, Kazuma Fukui, Masato Ohuchi, Kunpei Nojiri, Akihiro Terakado, Naomichi Ezumi, Mizuki Sakamoto, Tsuyoshi Imai

Power Exhaust and Particle Control

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

This research investigated the radiation cooling mechanism and formation of detached plasma in the case of gas injection in the D-module of GAMMA 10/PDX. In GAMMA 10/PDX, divertor simulation experiments have been started by using a divertor simulation experimental module (D-module). A V-shaped target made of tungsten has been installed in this module. In order to understand the effect of impurity injection into divertor simulation experimental module, we injected H₂ and Ar gases to the D-module and measured the heat flux and ion flux. According to the increase of gas injection, reduction of ion and heat fluxes have been observed. In the Ar injection experiments, H₂ gas has been injected simultaneously to examine the effect of molecular process on detached plasma formation. In this case, both the heat flux and ion flux are drastically reduced. These results indicate radiation cooling and formation of detached plasma due to gas injection. Simultaneous injection of noble gas and hydrogen gas showed the most effective results on detached plasma generation.

Original language	English
Article number	2402042
Journal	Plasma and Fusion Research
Volume	11
Issue number	Specialissue1
DOIs	https://doi.org/10.1585/pfr.11.2402042
State	Published - 2016

Funding

This study was supported by the bidirectional collaboration research program of the University of Tsukuba, Osaka Prefecture University, National Institute for Fusion Science (NIFS12KUGM066, NIFS14KUGM086). The authors would like to thank the members of the GAMMA 10 group.

Keywords

D-module
Detached plasma
Electron temperature (T), Electron density (n)
GAMMA 10/PDX
Heat flux
Ion saturation current (I)

Access to Document

10.1585/pfr.11.2402042

Cite this

Islam, M. S., Nakashima, Y., Matsuura, H., Ichimura, K., Islam, M. M., Shimizu, K., Fukui, K., Ohuchi, M., Nojiri, K., Terakado, A., Ezumi, N., Sakamoto, M., & Imai, T. (2016). Study of heat and particle flux in the case of gas injection in the D-Module of GAMMA 10/PDX. Plasma and Fusion Research, 11(Specialissue1), Article 2402042. https://doi.org/10.1585/pfr.11.2402042

@article{a750a2c2a9c4450a947a4373048b03dc,

title = "Study of heat and particle flux in the case of gas injection in the D-Module of GAMMA 10/PDX",

abstract = "This research investigated the radiation cooling mechanism and formation of detached plasma in the case of gas injection in the D-module of GAMMA 10/PDX. In GAMMA 10/PDX, divertor simulation experiments have been started by using a divertor simulation experimental module (D-module). A V-shaped target made of tungsten has been installed in this module. In order to understand the effect of impurity injection into divertor simulation experimental module, we injected H2 and Ar gases to the D-module and measured the heat flux and ion flux. According to the increase of gas injection, reduction of ion and heat fluxes have been observed. In the Ar injection experiments, H2 gas has been injected simultaneously to examine the effect of molecular process on detached plasma formation. In this case, both the heat flux and ion flux are drastically reduced. These results indicate radiation cooling and formation of detached plasma due to gas injection. Simultaneous injection of noble gas and hydrogen gas showed the most effective results on detached plasma generation.",

keywords = "D-module, Detached plasma, Electron temperature (T), Electron density (n), GAMMA 10/PDX, Heat flux, Ion saturation current (I)",

author = "Islam, \{Md Shahinul\} and Yousuke Nakashima and Hiroto Matsuura and Kazuya Ichimura and Islam, \{Md Maidul\} and Keita Shimizu and Kazuma Fukui and Masato Ohuchi and Kunpei Nojiri and Akihiro Terakado and Naomichi Ezumi and Mizuki Sakamoto and Tsuyoshi Imai",

note = "Publisher Copyright: {\textcopyright} 2016 The Japan Society of Plasma Science and Nuclear Fusion Research.",

year = "2016",

doi = "10.1585/pfr.11.2402042",

language = "English",

volume = "11",

journal = "Plasma and Fusion Research",

issn = "1880-6821",

number = "Specialissue1",

}

TY - JOUR

T1 - Study of heat and particle flux in the case of gas injection in the D-Module of GAMMA 10/PDX

AU - Islam, Md Shahinul

AU - Nakashima, Yousuke

AU - Matsuura, Hiroto

AU - Ichimura, Kazuya

AU - Islam, Md Maidul

AU - Shimizu, Keita

AU - Fukui, Kazuma

AU - Ohuchi, Masato

AU - Nojiri, Kunpei

AU - Terakado, Akihiro

AU - Ezumi, Naomichi

AU - Sakamoto, Mizuki

AU - Imai, Tsuyoshi

PY - 2016

Y1 - 2016

N2 - This research investigated the radiation cooling mechanism and formation of detached plasma in the case of gas injection in the D-module of GAMMA 10/PDX. In GAMMA 10/PDX, divertor simulation experiments have been started by using a divertor simulation experimental module (D-module). A V-shaped target made of tungsten has been installed in this module. In order to understand the effect of impurity injection into divertor simulation experimental module, we injected H2 and Ar gases to the D-module and measured the heat flux and ion flux. According to the increase of gas injection, reduction of ion and heat fluxes have been observed. In the Ar injection experiments, H2 gas has been injected simultaneously to examine the effect of molecular process on detached plasma formation. In this case, both the heat flux and ion flux are drastically reduced. These results indicate radiation cooling and formation of detached plasma due to gas injection. Simultaneous injection of noble gas and hydrogen gas showed the most effective results on detached plasma generation.

AB - This research investigated the radiation cooling mechanism and formation of detached plasma in the case of gas injection in the D-module of GAMMA 10/PDX. In GAMMA 10/PDX, divertor simulation experiments have been started by using a divertor simulation experimental module (D-module). A V-shaped target made of tungsten has been installed in this module. In order to understand the effect of impurity injection into divertor simulation experimental module, we injected H2 and Ar gases to the D-module and measured the heat flux and ion flux. According to the increase of gas injection, reduction of ion and heat fluxes have been observed. In the Ar injection experiments, H2 gas has been injected simultaneously to examine the effect of molecular process on detached plasma formation. In this case, both the heat flux and ion flux are drastically reduced. These results indicate radiation cooling and formation of detached plasma due to gas injection. Simultaneous injection of noble gas and hydrogen gas showed the most effective results on detached plasma generation.

KW - D-module

KW - Detached plasma

KW - Electron temperature (T), Electron density (n)

KW - GAMMA 10/PDX

KW - Heat flux

KW - Ion saturation current (I)

UR - https://www.scopus.com/pages/publications/84969872597

U2 - 10.1585/pfr.11.2402042

DO - 10.1585/pfr.11.2402042

M3 - Article

AN - SCOPUS:84969872597

SN - 1880-6821

VL - 11

JO - Plasma and Fusion Research

JF - Plasma and Fusion Research

IS - Specialissue1

M1 - 2402042

ER -

Study of heat and particle flux in the case of gas injection in the D-Module of GAMMA 10/PDX

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this