Evaluation of core beta effects on pedestal MHD stability in ITER and consequences for energy confinement

W. Oosterbeek; T. Weyens; A. Loarte; G.T.A. Huijsmans; F.J. Artola; A. Polevoi; S.H. Kim

Evaluation of core beta effects on pedestal MHD stability in ITER and consequences for energy confinement

W. Oosterbeek, T. Weyens, A. Loarte, G.T.A. Huijsmans, F.J. Artola, A. Polevoi, S.H. Kim

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

1 Citation (Scopus)

83 Downloads (Pure)

Abstract

The maximum stable pedestal pressure has been shown to increase with core pressure and in combination with profile stiffness this can lead to a positive feedback mechanism. However, the effect is shown to saturate for high β in ASDEX-Upgrade [1]. This paper investigates whether this effect appears in ITER scenarios, using ideal MHD numerical codes HELENA and MISHKA for different ITER scenarios from inductive 7.5-15 MA plasmas to steady-state scenarios at 10 MA. No pedestal pressure saturation is found for inductive scenarios; on the contrary for the 10MA steady-state scenario the pedestal pressure is the same for a wide range of total β and is limited by low n kink-peeling modes. Finally, a comparison of the achievable pressure for various levels of core profile stiffness is made with the IPB98(y,2) scaling law.

Original language	English
Title of host publication	45th EPS Conference on Plasma Physics, EPS 2018
Editors	C. Michaut, J. Berndt, M. Mantsinen, S. Coda, G. Lapenta, S. Weber
Publisher	European Physical Society (EPS)
Pages	733-736
Number of pages	4
ISBN (Electronic)	9781510868441
Publication status	Published - 1 Jul 2018
Event	45th European Physical Society Conference on Plasma Physics (EPS 2018) - Prague, Czech Republic Duration: 2 Jul 2018 → 6 Jul 2018 https://eps2018.eli-beams.eu/en/

Conference

Conference	45th European Physical Society Conference on Plasma Physics (EPS 2018)
Abbreviated title	EPS 2018
Country/Territory	Czech Republic
City	Prague
Period	2/07/18 → 6/07/18
Internet address	https://eps2018.eli-beams.eu/en/

Access to Document

Authors versionFinal author version , 701 KB

Cite this

Oosterbeek, W., Weyens, T., Loarte, A., Huijsmans, G. T. A., Artola, F. J., Polevoi, A., & Kim, S. H. (2018). Evaluation of core beta effects on pedestal MHD stability in ITER and consequences for energy confinement. In C. Michaut, J. Berndt, M. Mantsinen, S. Coda, G. Lapenta, & S. Weber (Eds.), 45th EPS Conference on Plasma Physics, EPS 2018 (pp. 733-736). European Physical Society (EPS).

@inproceedings{74bf575ed57344588261e9a1c1d47232,

title = "Evaluation of core beta effects on pedestal MHD stability in ITER and consequences for energy confinement",

abstract = "The maximum stable pedestal pressure has been shown to increase with core pressure and in combination with profile stiffness this can lead to a positive feedback mechanism. However, the effect is shown to saturate for high β in ASDEX-Upgrade [1]. This paper investigates whether this effect appears in ITER scenarios, using ideal MHD numerical codes HELENA and MISHKA for different ITER scenarios from inductive 7.5-15 MA plasmas to steady-state scenarios at 10 MA. No pedestal pressure saturation is found for inductive scenarios; on the contrary for the 10MA steady-state scenario the pedestal pressure is the same for a wide range of total β and is limited by low n kink-peeling modes. Finally, a comparison of the achievable pressure for various levels of core profile stiffness is made with the IPB98(y,2) scaling law.",

author = "W. Oosterbeek and T. Weyens and A. Loarte and G.T.A. Huijsmans and F.J. Artola and A. Polevoi and S.H. Kim",

year = "2018",

month = jul,

day = "1",

language = "English",

pages = "733--736",

editor = "C. Michaut and J. Berndt and M. Mantsinen and S. Coda and G. Lapenta and S. Weber",

booktitle = "45th EPS Conference on Plasma Physics, EPS 2018",

publisher = "European Physical Society (EPS)",

note = "45th European Physical Society Conference on Plasma Physics (EPS 2018), EPS 2018 ; Conference date: 02-07-2018 Through 06-07-2018",

url = "https://eps2018.eli-beams.eu/en/",

}

Oosterbeek, W, Weyens, T, Loarte, A, Huijsmans, GTA, Artola, FJ, Polevoi, A & Kim, SH 2018, Evaluation of core beta effects on pedestal MHD stability in ITER and consequences for energy confinement. in C Michaut, J Berndt, M Mantsinen, S Coda, G Lapenta & S Weber (eds), 45th EPS Conference on Plasma Physics, EPS 2018. European Physical Society (EPS), pp. 733-736, 45th European Physical Society Conference on Plasma Physics (EPS 2018), Prague, Czech Republic, 2/07/18.

Evaluation of core beta effects on pedestal MHD stability in ITER and consequences for energy confinement. / Oosterbeek, W.; Weyens, T.; Loarte, A. et al.
45th EPS Conference on Plasma Physics, EPS 2018. ed. / C. Michaut; J. Berndt; M. Mantsinen; S. Coda; G. Lapenta; S. Weber. European Physical Society (EPS), 2018. p. 733-736.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - Evaluation of core beta effects on pedestal MHD stability in ITER and consequences for energy confinement

AU - Oosterbeek, W.

AU - Weyens, T.

AU - Loarte, A.

AU - Huijsmans, G.T.A.

AU - Artola, F.J.

AU - Polevoi, A.

AU - Kim, S.H.

PY - 2018/7/1

Y1 - 2018/7/1

N2 - The maximum stable pedestal pressure has been shown to increase with core pressure and in combination with profile stiffness this can lead to a positive feedback mechanism. However, the effect is shown to saturate for high β in ASDEX-Upgrade [1]. This paper investigates whether this effect appears in ITER scenarios, using ideal MHD numerical codes HELENA and MISHKA for different ITER scenarios from inductive 7.5-15 MA plasmas to steady-state scenarios at 10 MA. No pedestal pressure saturation is found for inductive scenarios; on the contrary for the 10MA steady-state scenario the pedestal pressure is the same for a wide range of total β and is limited by low n kink-peeling modes. Finally, a comparison of the achievable pressure for various levels of core profile stiffness is made with the IPB98(y,2) scaling law.

AB - The maximum stable pedestal pressure has been shown to increase with core pressure and in combination with profile stiffness this can lead to a positive feedback mechanism. However, the effect is shown to saturate for high β in ASDEX-Upgrade [1]. This paper investigates whether this effect appears in ITER scenarios, using ideal MHD numerical codes HELENA and MISHKA for different ITER scenarios from inductive 7.5-15 MA plasmas to steady-state scenarios at 10 MA. No pedestal pressure saturation is found for inductive scenarios; on the contrary for the 10MA steady-state scenario the pedestal pressure is the same for a wide range of total β and is limited by low n kink-peeling modes. Finally, a comparison of the achievable pressure for various levels of core profile stiffness is made with the IPB98(y,2) scaling law.

UR - http://www.scopus.com/inward/record.url?scp=85057148563&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:85057148563

SP - 733

EP - 736

BT - 45th EPS Conference on Plasma Physics, EPS 2018

A2 - Michaut, C.

A2 - Berndt, J.

A2 - Mantsinen, M.

A2 - Coda, S.

A2 - Lapenta, G.

A2 - Weber, S.

PB - European Physical Society (EPS)

T2 - 45th European Physical Society Conference on Plasma Physics (EPS 2018)

Y2 - 2 July 2018 through 6 July 2018

ER -

Evaluation of core beta effects on pedestal MHD stability in ITER and consequences for energy confinement

Abstract

Conference

Access to Document

Other files and links

Fingerprint

Cite this