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; Volker 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, Volker 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

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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 ωE×B threshold up-shift and plays a major role in enhancing core confinement in hybrid regimes and ion internal transport barriers. The effects of Te/Ti 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
Journal	Plasma Physics and Controlled Fusion
Volume	53
Issue number	12
Pages (from-to)	124033
ISSN	0741-3335
DOIs	https://doi.org/10.1088/0741-3335/53/12/124033
Publication status	Published - 2011

Keywords

Fusion energy

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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), 124033. https://doi.org/10.1088/0741-3335/53/12/124033

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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 ωE×B threshold up-shift and plays a major role in enhancing core confinement in hybrid regimes and ion internal transport barriers. The effects of Te/Ti 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.",

keywords = "Fusion energy, Fusionsenergiforskning",

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 Volker 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",

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

language = "English",

volume = "53",

pages = "124033",

journal = "Plasma Physics and Controlled Fusion",

issn = "0741-3335",

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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, pp. 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, Volker

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

Y1 - 2011

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 ωE×B threshold up-shift and plays a major role in enhancing core confinement in hybrid regimes and ion internal transport barriers. The effects of Te/Ti 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 ωE×B threshold up-shift and plays a major role in enhancing core confinement in hybrid regimes and ion internal transport barriers. The effects of Te/Ti 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.

KW - Fusion energy

KW - Fusionsenergiforskning

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

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

M3 - Journal article

SN - 0741-3335

VL - 53

SP - 124033

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 12

ER -

Ion heat transport studies in JET

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