Identity physics experiment on internal transport barriers in JT-60U and JET

P. C. De Vries; Y. Sakamoto; X. Litaudon; M. N. A. Beurskens; M. Brix; K. Crombe; T. Fujita; C. Giroud; N. C. Hawkes; N. Hayashi; E. Joffrin; P. Mantica; G. Matsunaga; N. Oyama; V. Parail; A. Salmi; K. Shinohara; D. Strintzi; T. Suzuki; M. Takechi; H. Takenaga; Tuomas Tala; M. Tsalas; H. Urano; I. Voitsekhovitch; M. Yoshida; JT-60 Team; JET-EFDA contributors

doi:10.1088/0741-3335/51/12/124050

Identity physics experiment on internal transport barriers in JT-60U and JET

P. C. De Vries, Y. Sakamoto, X. Litaudon, M. N. A. Beurskens, M. Brix, K. Crombe, T. Fujita, C. Giroud, N. C. Hawkes, N. Hayashi, E. Joffrin, P. Mantica, G. Matsunaga, N. Oyama, V. Parail, A. Salmi, K. Shinohara, D. Strintzi, T. Suzuki, M. TakechiH. Takenaga, Tuomas Tala, M. Tsalas, H. Urano, I. Voitsekhovitch, M. Yoshida, JT-60 Team, JET-EFDA contributors

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Abstract

A series of experiments have been carried out in 2008 at JT-60U and JET to find common characteristics and explain differences between internal transport barriers (ITBs). The identity experiments succeeded in matching the profiles of most dimensionless parameters at the time ITBs were triggered. Thereafter the q-profile development deviated due to differences in non-inductive current density profile, affecting the ITB. Furthermore, the ITBs in JET were more strongly influenced by the H-mode pedestal or edge localized modes. It was found to be difficult to match the plasma rotation characteristics in both devices. However, the wide range of Mach numbers obtained in these experiments shows that the rotation has little effect on the triggering of ITBs in plasmas with reversed magnetic shear. On the other hand the toroidal rotation and more specifically the rotational shear had an impact on the subsequent growth and allowed the formation of strong ITBs.

Original language	English
Journal	Plasma Physics and Controlled Fusion
Volume	51
Issue number	12
DOIs	https://doi.org/10.1088/0741-3335/51/12/124050
Publication status	Published - 2009
MoE publication type	A1 Journal article-refereed

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De Vries, P. C., Sakamoto, Y., Litaudon, X., Beurskens, M. N. A., Brix, M., Crombe, K., Fujita, T., Giroud, C., Hawkes, N. C., Hayashi, N., Joffrin, E., Mantica, P., Matsunaga, G., Oyama, N., Parail, V., Salmi, A., Shinohara, K., Strintzi, D., Suzuki, T., ... JET-EFDA contributors (2009). Identity physics experiment on internal transport barriers in JT-60U and JET. Plasma Physics and Controlled Fusion, 51(12). https://doi.org/10.1088/0741-3335/51/12/124050

@article{d9798aef3eb44a6cbb2fb679e2df752f,

title = "Identity physics experiment on internal transport barriers in JT-60U and JET",

abstract = "A series of experiments have been carried out in 2008 at JT-60U and JET to find common characteristics and explain differences between internal transport barriers (ITBs). The identity experiments succeeded in matching the profiles of most dimensionless parameters at the time ITBs were triggered. Thereafter the q-profile development deviated due to differences in non-inductive current density profile, affecting the ITB. Furthermore, the ITBs in JET were more strongly influenced by the H-mode pedestal or edge localized modes. It was found to be difficult to match the plasma rotation characteristics in both devices. However, the wide range of Mach numbers obtained in these experiments shows that the rotation has little effect on the triggering of ITBs in plasmas with reversed magnetic shear. On the other hand the toroidal rotation and more specifically the rotational shear had an impact on the subsequent growth and allowed the formation of strong ITBs.",

author = "{De Vries}, {P. C.} and Y. Sakamoto and X. Litaudon and Beurskens, {M. N. A.} and M. Brix and K. Crombe and T. Fujita and C. Giroud and Hawkes, {N. C.} and N. Hayashi and E. Joffrin and P. Mantica and G. Matsunaga and N. Oyama and V. Parail and A. Salmi and K. Shinohara and D. Strintzi and T. Suzuki and M. Takechi and H. Takenaga and Tuomas Tala and M. Tsalas and H. Urano and I. Voitsekhovitch and M. Yoshida and {JT-60 Team} and {JET-EFDA contributors}",

year = "2009",

doi = "10.1088/0741-3335/51/12/124050",

language = "English",

volume = "51",

journal = "Plasma Physics and Controlled Fusion",

issn = "0741-3335",

publisher = "Institute of Physics IOP",

number = "12",

}

De Vries, PC, Sakamoto, Y, Litaudon, X, Beurskens, MNA, Brix, M, Crombe, K, Fujita, T, Giroud, C, Hawkes, NC, Hayashi, N, Joffrin, E, Mantica, P, Matsunaga, G, Oyama, N, Parail, V, Salmi, A, Shinohara, K, Strintzi, D, Suzuki, T, Takechi, M, Takenaga, H, Tala, T, Tsalas, M, Urano, H, Voitsekhovitch, I, Yoshida, M, JT-60 Team & JET-EFDA contributors 2009, 'Identity physics experiment on internal transport barriers in JT-60U and JET', Plasma Physics and Controlled Fusion, vol. 51, no. 12. https://doi.org/10.1088/0741-3335/51/12/124050

TY - JOUR

T1 - Identity physics experiment on internal transport barriers in JT-60U and JET

AU - De Vries, P. C.

AU - Sakamoto, Y.

AU - Litaudon, X.

AU - Beurskens, M. N. A.

AU - Brix, M.

AU - Crombe, K.

AU - Fujita, T.

AU - Giroud, C.

AU - Hawkes, N. C.

AU - Hayashi, N.

AU - Joffrin, E.

AU - Mantica, P.

AU - Matsunaga, G.

AU - Oyama, N.

AU - Parail, V.

AU - Salmi, A.

AU - Shinohara, K.

AU - Strintzi, D.

AU - Suzuki, T.

AU - Takechi, M.

AU - Takenaga, H.

AU - Tala, Tuomas

AU - Tsalas, M.

AU - Urano, H.

AU - Voitsekhovitch, I.

AU - Yoshida, M.

AU - JT-60 Team

AU - JET-EFDA contributors

PY - 2009

Y1 - 2009

N2 - A series of experiments have been carried out in 2008 at JT-60U and JET to find common characteristics and explain differences between internal transport barriers (ITBs). The identity experiments succeeded in matching the profiles of most dimensionless parameters at the time ITBs were triggered. Thereafter the q-profile development deviated due to differences in non-inductive current density profile, affecting the ITB. Furthermore, the ITBs in JET were more strongly influenced by the H-mode pedestal or edge localized modes. It was found to be difficult to match the plasma rotation characteristics in both devices. However, the wide range of Mach numbers obtained in these experiments shows that the rotation has little effect on the triggering of ITBs in plasmas with reversed magnetic shear. On the other hand the toroidal rotation and more specifically the rotational shear had an impact on the subsequent growth and allowed the formation of strong ITBs.

AB - A series of experiments have been carried out in 2008 at JT-60U and JET to find common characteristics and explain differences between internal transport barriers (ITBs). The identity experiments succeeded in matching the profiles of most dimensionless parameters at the time ITBs were triggered. Thereafter the q-profile development deviated due to differences in non-inductive current density profile, affecting the ITB. Furthermore, the ITBs in JET were more strongly influenced by the H-mode pedestal or edge localized modes. It was found to be difficult to match the plasma rotation characteristics in both devices. However, the wide range of Mach numbers obtained in these experiments shows that the rotation has little effect on the triggering of ITBs in plasmas with reversed magnetic shear. On the other hand the toroidal rotation and more specifically the rotational shear had an impact on the subsequent growth and allowed the formation of strong ITBs.

U2 - 10.1088/0741-3335/51/12/124050

DO - 10.1088/0741-3335/51/12/124050

M3 - Article

VL - 51

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

SN - 0741-3335

IS - 12

ER -

Identity physics experiment on internal transport barriers in JT-60U and JET

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