Ion heat transport studies in JET

P. Mantica; C. Angioni; B. Baiocchi; M. Baruzzo; M. N.A. Beurskens; J. P.S. Bizarro; R. V. Budny; P. Buratti; A. Casati; C. Challis; J. Citrin; G. Colyer; F. Crisanti; A. C.A. Figueiredo; L. Frassinetti; C. Giroud; N. Hawkes; J. Hobirk; E. Joffrin; T. Johnson; E. Lerche; P. Migliano; V. Naulin; A. G. Peeters; G. Rewoldt; F. Ryter; A. Salmi; R. Sartori; C. Sozzi; G. Staebler; D. Strintzi; T. Tala; M. Tsalas; D. Van Eester; T. Versloot; P. C. DeVries; J. Weiland

doi:10.1088/0741-3335/53/12/124033

Ion heat transport studies in JET

P. Mantica, C. Angioni, B. Baiocchi, M. Baruzzo, M. N.A. Beurskens, J. P.S. Bizarro, R. V. Budny, P. Buratti, A. Casati, C. Challis, J. Citrin, G. Colyer, F. Crisanti, A. C.A. Figueiredo, L. Frassinetti, C. Giroud, N. Hawkes, J. Hobirk, E. Joffrin, T. JohnsonE. Lerche, P. Migliano, V. Naulin, A. G. Peeters, G. Rewoldt, F. Ryter, A. Salmi, R. Sartori, C. Sozzi, G. Staebler, D. Strintzi, T. Tala, M. Tsalas, D. Van Eester, T. Versloot, P. C. DeVries, J. Weiland

Laboratory for Plasma Physics

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Abstract

Detailed experimental studies of ion heat transport have been carried out in JET exploiting the upgrade of active charge exchange spectroscopy and the availability of multi-frequency ion cyclotron resonance heating with ³He minority. The determination of ion temperature gradient (ITG) threshold and ion stiffness offers unique opportunities for validation of the well-established theory of ITG driven modes. Ion stiffness is observed to decrease strongly in the presence of toroidal rotation when the magnetic shear is sufficiently low. This effect is dominant with respect to the well-known ω _E×B threshold up-shift and plays a major role in enhancing core confinement in hybrid regimes and ion internal transport barriers. The effects of T _e/T _i and s/q on ion threshold are found rather weak in the domain explored. Quasi-linear fluid/gyro-fluid and linear/non-linear gyro-kinetic simulations have been carried out. Whilst threshold predictions show good match with experimental observations, some significant discrepancies are found on the stiffness behaviour.

Original language	English
Article number	124033
Journal	Plasma Physics and Controlled Fusion
Volume	53
Issue number	12
DOIs	https://doi.org/10.1088/0741-3335/53/12/124033
Publication status	Published - Dec 2011

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Mantica, P., Angioni, C., Baiocchi, B., Baruzzo, M., Beurskens, M. N. A., Bizarro, J. P. S., Budny, R. V., Buratti, P., Casati, A., Challis, C., Citrin, J., Colyer, G., Crisanti, F., Figueiredo, A. C. A., Frassinetti, L., Giroud, C., Hawkes, N., Hobirk, J., Joffrin, E., ... Weiland, J. (2011). Ion heat transport studies in JET. Plasma Physics and Controlled Fusion, 53(12), Article 124033. https://doi.org/10.1088/0741-3335/53/12/124033

@article{10691e75da97401a98be4400207e3668,

title = "Ion heat transport studies in JET",

abstract = "Detailed experimental studies of ion heat transport have been carried out in JET exploiting the upgrade of active charge exchange spectroscopy and the availability of multi-frequency ion cyclotron resonance heating with 3He minority. The determination of ion temperature gradient (ITG) threshold and ion stiffness offers unique opportunities for validation of the well-established theory of ITG driven modes. Ion stiffness is observed to decrease strongly in the presence of toroidal rotation when the magnetic shear is sufficiently low. This effect is dominant with respect to the well-known ω E×B threshold up-shift and plays a major role in enhancing core confinement in hybrid regimes and ion internal transport barriers. The effects of T e/T i and s/q on ion threshold are found rather weak in the domain explored. Quasi-linear fluid/gyro-fluid and linear/non-linear gyro-kinetic simulations have been carried out. Whilst threshold predictions show good match with experimental observations, some significant discrepancies are found on the stiffness behaviour.",

author = "P. Mantica and C. Angioni and B. Baiocchi and M. Baruzzo and Beurskens, {M. N.A.} and Bizarro, {J. P.S.} and Budny, {R. V.} and P. Buratti and A. Casati and C. Challis and J. Citrin and G. Colyer and F. Crisanti and Figueiredo, {A. C.A.} and L. Frassinetti and C. Giroud and N. Hawkes and J. Hobirk and E. Joffrin and T. Johnson and E. Lerche and P. Migliano and V. Naulin and Peeters, {A. G.} and G. Rewoldt and F. Ryter and A. Salmi and R. Sartori and C. Sozzi and G. Staebler and D. Strintzi and T. Tala and M. Tsalas and {Van Eester}, D. and T. Versloot and DeVries, {P. C.} and J. Weiland",

year = "2011",

month = dec,

doi = "10.1088/0741-3335/53/12/124033",

language = "English",

volume = "53",

journal = "Plasma Physics and Controlled Fusion",

issn = "0741-3335",

number = "12",

}

Mantica, P, Angioni, C, Baiocchi, B, Baruzzo, M, Beurskens, MNA, Bizarro, JPS, Budny, RV, Buratti, P, Casati, A, Challis, C, Citrin, J, Colyer, G, Crisanti, F, Figueiredo, ACA, Frassinetti, L, Giroud, C, Hawkes, N, Hobirk, J, Joffrin, E, Johnson, T, Lerche, E, Migliano, P, Naulin, V, Peeters, AG, Rewoldt, G, Ryter, F, Salmi, A, Sartori, R, Sozzi, C, Staebler, G, Strintzi, D, Tala, T, Tsalas, M, Van Eester, D, Versloot, T, DeVries, PC & Weiland, J 2011, 'Ion heat transport studies in JET', Plasma Physics and Controlled Fusion, vol. 53, no. 12, 124033. https://doi.org/10.1088/0741-3335/53/12/124033

TY - JOUR

T1 - Ion heat transport studies in JET

AU - Mantica, P.

AU - Angioni, C.

AU - Baiocchi, B.

AU - Baruzzo, M.

AU - Beurskens, M. N.A.

AU - Bizarro, J. P.S.

AU - Budny, R. V.

AU - Buratti, P.

AU - Casati, A.

AU - Challis, C.

AU - Citrin, J.

AU - Colyer, G.

AU - Crisanti, F.

AU - Figueiredo, A. C.A.

AU - Frassinetti, L.

AU - Giroud, C.

AU - Hawkes, N.

AU - Hobirk, J.

AU - Joffrin, E.

AU - Johnson, T.

AU - Lerche, E.

AU - Migliano, P.

AU - Naulin, V.

AU - Peeters, A. G.

AU - Rewoldt, G.

AU - Ryter, F.

AU - Salmi, A.

AU - Sartori, R.

AU - Sozzi, C.

AU - Staebler, G.

AU - Strintzi, D.

AU - Tala, T.

AU - Tsalas, M.

AU - Van Eester, D.

AU - Versloot, T.

AU - DeVries, P. C.

AU - Weiland, J.

PY - 2011/12

Y1 - 2011/12

N2 - Detailed experimental studies of ion heat transport have been carried out in JET exploiting the upgrade of active charge exchange spectroscopy and the availability of multi-frequency ion cyclotron resonance heating with 3He minority. The determination of ion temperature gradient (ITG) threshold and ion stiffness offers unique opportunities for validation of the well-established theory of ITG driven modes. Ion stiffness is observed to decrease strongly in the presence of toroidal rotation when the magnetic shear is sufficiently low. This effect is dominant with respect to the well-known ω E×B threshold up-shift and plays a major role in enhancing core confinement in hybrid regimes and ion internal transport barriers. The effects of T e/T i and s/q on ion threshold are found rather weak in the domain explored. Quasi-linear fluid/gyro-fluid and linear/non-linear gyro-kinetic simulations have been carried out. Whilst threshold predictions show good match with experimental observations, some significant discrepancies are found on the stiffness behaviour.

AB - Detailed experimental studies of ion heat transport have been carried out in JET exploiting the upgrade of active charge exchange spectroscopy and the availability of multi-frequency ion cyclotron resonance heating with 3He minority. The determination of ion temperature gradient (ITG) threshold and ion stiffness offers unique opportunities for validation of the well-established theory of ITG driven modes. Ion stiffness is observed to decrease strongly in the presence of toroidal rotation when the magnetic shear is sufficiently low. This effect is dominant with respect to the well-known ω E×B threshold up-shift and plays a major role in enhancing core confinement in hybrid regimes and ion internal transport barriers. The effects of T e/T i and s/q on ion threshold are found rather weak in the domain explored. Quasi-linear fluid/gyro-fluid and linear/non-linear gyro-kinetic simulations have been carried out. Whilst threshold predictions show good match with experimental observations, some significant discrepancies are found on the stiffness behaviour.

UR - http://www.scopus.com/inward/record.url?scp=83755169509&partnerID=8YFLogxK

U2 - 10.1088/0741-3335/53/12/124033

DO - 10.1088/0741-3335/53/12/124033

M3 - Article

AN - SCOPUS:83755169509

SN - 0741-3335

VL - 53

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 12

M1 - 124033

ER -

Ion heat transport studies in JET

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