H-L transition caused by irregular probe insertion in the JFT-2M tokamak

K. Hanada; M. Hasegawa; K. Shinohara; S. Ohdachi; T. Shoji; Y. Miura; H. Tamai; T. Oikawa; H. Totsuka; E. Ishiyama; N. Shinoda; S. Shiraiwa; H. Saito; Y. Endo; K. Yamagishi; H. Toyama

doi:10.1088/0741-3335/38/8/018

H-L transition caused by irregular probe insertion in the JFT-2M tokamak

K. Hanada
, M. Hasegawa
, K. Shinohara
, S. Ohdachi
, T. Shoji
, Y. Miura
, H. Tamai
, T. Oikawa
, H. Totsuka
, E. Ishiyama
, N. Shinoda
, S. Shiraiwa
, H. Saito
, Y. Endo
, K. Yamagishi
, H. Toyama

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

Abstract

A pair of probe pins whose lengths differ by 5 mm are inserted into the separatrix of H-mode plasmas. When the long pin is biased positively against the short one, the H-L transition takes place and the current through the resistor making a connection between these pins increases for 10 μs and the potential of the pin increases for 100 μs. The energy dissipated by the resistor during the H-L transition is comparable to the energy of the radial electric field in H-mode plasma. When the long pin is biased negatively, the H-L transition also occurs; however, it takes 1 ms to change the potential of the pin and the plasma returns to H-mode after the extraction of the probe.

Original language	American English
Pages (from-to)	1255-1259
Number of pages	5
Journal	Plasma Physics and Controlled Fusion
Volume	38
Issue number	8
DOIs	https://doi.org/10.1088/0741-3335/38/8/018
State	Published - 1996
Externally published	Yes

ASJC Scopus subject areas

Nuclear Energy and Engineering
Condensed Matter Physics

Access to Document

10.1088/0741-3335/38/8/018

Cite this

Hanada, K., Hasegawa, M., Shinohara, K., Ohdachi, S., Shoji, T., Miura, Y., Tamai, H., Oikawa, T., Totsuka, H., Ishiyama, E., Shinoda, N., Shiraiwa, S., Saito, H., Endo, Y., Yamagishi, K., & Toyama, H. (1996). H-L transition caused by irregular probe insertion in the JFT-2M tokamak. Plasma Physics and Controlled Fusion, 38(8), 1255-1259. https://doi.org/10.1088/0741-3335/38/8/018

@article{8ae9dae1f724417faa0d22f1aec08e4c,

title = "H-L transition caused by irregular probe insertion in the JFT-2M tokamak",

abstract = "A pair of probe pins whose lengths differ by 5 mm are inserted into the separatrix of H-mode plasmas. When the long pin is biased positively against the short one, the H-L transition takes place and the current through the resistor making a connection between these pins increases for 10 μs and the potential of the pin increases for 100 μs. The energy dissipated by the resistor during the H-L transition is comparable to the energy of the radial electric field in H-mode plasma. When the long pin is biased negatively, the H-L transition also occurs; however, it takes 1 ms to change the potential of the pin and the plasma returns to H-mode after the extraction of the probe.",

author = "K. Hanada and M. Hasegawa and K. Shinohara and S. Ohdachi and T. Shoji and Y. Miura and H. Tamai and T. Oikawa and H. Totsuka and E. Ishiyama and N. Shinoda and S. Shiraiwa and H. Saito and Y. Endo and K. Yamagishi and H. Toyama",

year = "1996",

doi = "10.1088/0741-3335/38/8/018",

language = "American English",

volume = "38",

pages = "1255--1259",

journal = "Plasma Physics and Controlled Fusion",

issn = "0741-3335",

publisher = "IOP Publishing Ltd.",

number = "8",

}

Hanada, K, Hasegawa, M, Shinohara, K, Ohdachi, S, Shoji, T, Miura, Y, Tamai, H, Oikawa, T, Totsuka, H, Ishiyama, E, Shinoda, N, Shiraiwa, S, Saito, H, Endo, Y, Yamagishi, K & Toyama, H 1996, 'H-L transition caused by irregular probe insertion in the JFT-2M tokamak', Plasma Physics and Controlled Fusion, vol. 38, no. 8, pp. 1255-1259. https://doi.org/10.1088/0741-3335/38/8/018

TY - JOUR

T1 - H-L transition caused by irregular probe insertion in the JFT-2M tokamak

AU - Hanada, K.

AU - Hasegawa, M.

AU - Shinohara, K.

AU - Ohdachi, S.

AU - Shoji, T.

AU - Miura, Y.

AU - Tamai, H.

AU - Oikawa, T.

AU - Totsuka, H.

AU - Ishiyama, E.

AU - Shinoda, N.

AU - Shiraiwa, S.

AU - Saito, H.

AU - Endo, Y.

AU - Yamagishi, K.

AU - Toyama, H.

PY - 1996

Y1 - 1996

N2 - A pair of probe pins whose lengths differ by 5 mm are inserted into the separatrix of H-mode plasmas. When the long pin is biased positively against the short one, the H-L transition takes place and the current through the resistor making a connection between these pins increases for 10 μs and the potential of the pin increases for 100 μs. The energy dissipated by the resistor during the H-L transition is comparable to the energy of the radial electric field in H-mode plasma. When the long pin is biased negatively, the H-L transition also occurs; however, it takes 1 ms to change the potential of the pin and the plasma returns to H-mode after the extraction of the probe.

AB - A pair of probe pins whose lengths differ by 5 mm are inserted into the separatrix of H-mode plasmas. When the long pin is biased positively against the short one, the H-L transition takes place and the current through the resistor making a connection between these pins increases for 10 μs and the potential of the pin increases for 100 μs. The energy dissipated by the resistor during the H-L transition is comparable to the energy of the radial electric field in H-mode plasma. When the long pin is biased negatively, the H-L transition also occurs; however, it takes 1 ms to change the potential of the pin and the plasma returns to H-mode after the extraction of the probe.

UR - https://www.scopus.com/pages/publications/0030204479

UR - https://www.scopus.com/pages/publications/0030204479#tab=citedBy

U2 - 10.1088/0741-3335/38/8/018

DO - 10.1088/0741-3335/38/8/018

M3 - Article

SN - 0741-3335

VL - 38

SP - 1255

EP - 1259

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 8

ER -

H-L transition caused by irregular probe insertion in the JFT-2M tokamak

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this