Neutron emission spectroscopy results for internal transport barrier and mode conversion ion cyclotron resonance heating experiments at JET

L. Giacomelli; A. Hjalmarsson; J. Källne; C. Hellesen; M. Tardocchi; G. Gorini; D. Van Eester; E. Lerche; T. Johnson; V. Kiptily; S. Conroy; E. Andersson Sund́n; G. Ericsson; M. Gatu Johnson; H. Sjöstrand; M. Weiszflog

doi:10.1063/1.2965009

Neutron emission spectroscopy results for internal transport barrier and mode conversion ion cyclotron resonance heating experiments at JET

L. Giacomelli, A. Hjalmarsson, J. Källne, C. Hellesen, M. Tardocchi, G. Gorini, D. Van Eester, E. Lerche, T. Johnson, V. Kiptily, S. Conroy, E. Andersson Sund́n, G. Ericsson, M. Gatu Johnson, H. Sjöstrand, M. Weiszflog

Laboratory for Plasma Physics

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Abstract

The effect of ion cyclotron resonance heating (ICRH) on (H3 e) D plasmas at JET was studied with the time of flight optimized rate (TOFOR) spectrometer dedicated to 2.5 MeV dd neutron measurements. In internal transport barrier (ITB) plasma experiments with large H3 e concentrations (X (H3 e) >15%) an increase in neutron yield was observed after the ITB disappeared but with the auxiliary neutral beam injection and ICRH power still applied. The analysis of the TOFOR data revealed the formation of a high energy (fast) D population in this regime. The results were compared to other mode conversion experiments with similar X (H3 e) but slightly different heating conditions. In this study we report on the high energy neutron tails originating from the fast D ions and their correlation with X (H3 e) and discuss the light it can shed on ICRH-plasma power coupling mechanisms.

Original language	English
Article number	10E514
Journal	Review of Scientific Instruments
Volume	79
Issue number	10
DOIs	https://doi.org/10.1063/1.2965009
Publication status	Published - 2008

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Giacomelli, L., Hjalmarsson, A., Källne, J., Hellesen, C., Tardocchi, M., Gorini, G., Van Eester, D., Lerche, E., Johnson, T., Kiptily, V., Conroy, S., Sund́n, E. A., Ericsson, G., Johnson, M. G., Sjöstrand, H., & Weiszflog, M. (2008). Neutron emission spectroscopy results for internal transport barrier and mode conversion ion cyclotron resonance heating experiments at JET. Review of Scientific Instruments, 79(10), Article 10E514. https://doi.org/10.1063/1.2965009

@article{61828dbbc0ab4505ae019ebff56d7535,

title = "Neutron emission spectroscopy results for internal transport barrier and mode conversion ion cyclotron resonance heating experiments at JET",

abstract = "The effect of ion cyclotron resonance heating (ICRH) on (H3 e) D plasmas at JET was studied with the time of flight optimized rate (TOFOR) spectrometer dedicated to 2.5 MeV dd neutron measurements. In internal transport barrier (ITB) plasma experiments with large H3 e concentrations (X (H3 e) >15%) an increase in neutron yield was observed after the ITB disappeared but with the auxiliary neutral beam injection and ICRH power still applied. The analysis of the TOFOR data revealed the formation of a high energy (fast) D population in this regime. The results were compared to other mode conversion experiments with similar X (H3 e) but slightly different heating conditions. In this study we report on the high energy neutron tails originating from the fast D ions and their correlation with X (H3 e) and discuss the light it can shed on ICRH-plasma power coupling mechanisms.",

author = "L. Giacomelli and A. Hjalmarsson and J. K{\"a}llne and C. Hellesen and M. Tardocchi and G. Gorini and {Van Eester}, D. and E. Lerche and T. Johnson and V. Kiptily and S. Conroy and Sun{\'d}n, {E. Andersson} and G. Ericsson and Johnson, {M. Gatu} and H. Sj{\"o}strand and M. Weiszflog",

note = "Funding Information: This work was performed under the auspices of the European Fusion Development Agreement with financial support from the Swedish Research Council and EURATOM. The views and opinions expressed herein do not necessarily reflect these of the European Commission.",

year = "2008",

doi = "10.1063/1.2965009",

language = "English",

volume = "79",

journal = "Review of Scientific Instruments",

issn = "0034-6748",

number = "10",

}

Giacomelli, L, Hjalmarsson, A, Källne, J, Hellesen, C, Tardocchi, M, Gorini, G, Van Eester, D , Lerche, E, Johnson, T, Kiptily, V, Conroy, S, Sund́n, EA, Ericsson, G, Johnson, MG, Sjöstrand, H & Weiszflog, M 2008, 'Neutron emission spectroscopy results for internal transport barrier and mode conversion ion cyclotron resonance heating experiments at JET', Review of Scientific Instruments, vol. 79, no. 10, 10E514. https://doi.org/10.1063/1.2965009

TY - JOUR

T1 - Neutron emission spectroscopy results for internal transport barrier and mode conversion ion cyclotron resonance heating experiments at JET

AU - Giacomelli, L.

AU - Hjalmarsson, A.

AU - Källne, J.

AU - Hellesen, C.

AU - Tardocchi, M.

AU - Gorini, G.

AU - Van Eester, D.

AU - Lerche, E.

AU - Johnson, T.

AU - Kiptily, V.

AU - Conroy, S.

AU - Sund́n, E. Andersson

AU - Ericsson, G.

AU - Johnson, M. Gatu

AU - Sjöstrand, H.

AU - Weiszflog, M.

N1 - Funding Information: This work was performed under the auspices of the European Fusion Development Agreement with financial support from the Swedish Research Council and EURATOM. The views and opinions expressed herein do not necessarily reflect these of the European Commission.

PY - 2008

Y1 - 2008

N2 - The effect of ion cyclotron resonance heating (ICRH) on (H3 e) D plasmas at JET was studied with the time of flight optimized rate (TOFOR) spectrometer dedicated to 2.5 MeV dd neutron measurements. In internal transport barrier (ITB) plasma experiments with large H3 e concentrations (X (H3 e) >15%) an increase in neutron yield was observed after the ITB disappeared but with the auxiliary neutral beam injection and ICRH power still applied. The analysis of the TOFOR data revealed the formation of a high energy (fast) D population in this regime. The results were compared to other mode conversion experiments with similar X (H3 e) but slightly different heating conditions. In this study we report on the high energy neutron tails originating from the fast D ions and their correlation with X (H3 e) and discuss the light it can shed on ICRH-plasma power coupling mechanisms.

AB - The effect of ion cyclotron resonance heating (ICRH) on (H3 e) D plasmas at JET was studied with the time of flight optimized rate (TOFOR) spectrometer dedicated to 2.5 MeV dd neutron measurements. In internal transport barrier (ITB) plasma experiments with large H3 e concentrations (X (H3 e) >15%) an increase in neutron yield was observed after the ITB disappeared but with the auxiliary neutral beam injection and ICRH power still applied. The analysis of the TOFOR data revealed the formation of a high energy (fast) D population in this regime. The results were compared to other mode conversion experiments with similar X (H3 e) but slightly different heating conditions. In this study we report on the high energy neutron tails originating from the fast D ions and their correlation with X (H3 e) and discuss the light it can shed on ICRH-plasma power coupling mechanisms.

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U2 - 10.1063/1.2965009

DO - 10.1063/1.2965009

M3 - Article

AN - SCOPUS:55349135206

SN - 0034-6748

VL - 79

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 10

M1 - 10E514

ER -

Neutron emission spectroscopy results for internal transport barrier and mode conversion ion cyclotron resonance heating experiments at JET

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