Observations of core ion cyclotron emission on ASDEX Upgrade tokamak

Research output: Contribution to journalConference article – Annual report year: 2018Researchpeer-review

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Observations of core ion cyclotron emission on ASDEX Upgrade tokamak. / Ochoukov, R.; Bobkov, V.; Chapman, B.; Dendy, R.; Dunne, M.; Faugel, H.; García-Muñoz, M.; Geiger, B.; Hennequin, P.; McClements, K.G.; Moseev, D.; Nielsen, S.; Rasmussen, A.N.; Schneider, P.; Weiland, M.; Noterdaeme, J.-M.

In: Review of Scientific Instruments, Vol. 89, No. 10, 10J101, 2018.

Research output: Contribution to journalConference article – Annual report year: 2018Researchpeer-review

Harvard

Ochoukov, R, Bobkov, V, Chapman, B, Dendy, R, Dunne, M, Faugel, H, García-Muñoz, M, Geiger, B, Hennequin, P, McClements, KG, Moseev, D, Nielsen, S, Rasmussen, AN, Schneider, P, Weiland, M & Noterdaeme, J-M 2018, 'Observations of core ion cyclotron emission on ASDEX Upgrade tokamak', Review of Scientific Instruments, vol. 89, no. 10, 10J101. https://doi.org/10.1063/1.5035180

APA

Ochoukov, R., Bobkov, V., Chapman, B., Dendy, R., Dunne, M., Faugel, H., ... Noterdaeme, J-M. (2018). Observations of core ion cyclotron emission on ASDEX Upgrade tokamak. Review of Scientific Instruments, 89(10), [10J101]. https://doi.org/10.1063/1.5035180

CBE

Ochoukov R, Bobkov V, Chapman B, Dendy R, Dunne M, Faugel H, García-Muñoz M, Geiger B, Hennequin P, McClements KG, Moseev D, Nielsen S, Rasmussen AN, Schneider P, Weiland M, Noterdaeme J-M. 2018. Observations of core ion cyclotron emission on ASDEX Upgrade tokamak. Review of Scientific Instruments. 89(10). https://doi.org/10.1063/1.5035180

MLA

Vancouver

Ochoukov R, Bobkov V, Chapman B, Dendy R, Dunne M, Faugel H et al. Observations of core ion cyclotron emission on ASDEX Upgrade tokamak. Review of Scientific Instruments. 2018;89(10). 10J101. https://doi.org/10.1063/1.5035180

Author

Ochoukov, R. ; Bobkov, V. ; Chapman, B. ; Dendy, R. ; Dunne, M. ; Faugel, H. ; García-Muñoz, M. ; Geiger, B. ; Hennequin, P. ; McClements, K.G. ; Moseev, D. ; Nielsen, S. ; Rasmussen, A.N. ; Schneider, P. ; Weiland, M. ; Noterdaeme, J.-M. / Observations of core ion cyclotron emission on ASDEX Upgrade tokamak. In: Review of Scientific Instruments. 2018 ; Vol. 89, No. 10.

Bibtex

@inproceedings{d340cc3a3d3d4cf18492992ca6eeae8d,
title = "Observations of core ion cyclotron emission on ASDEX Upgrade tokamak",
abstract = "The B-dot probe diagnostic suite on the ASDEX Upgrade tokamak has recently been upgraded with a new 125 MHz, 14 bit resolution digitizer to study ion cyclotron emission (ICE). While classic edge emission from the low field side plasma is often observed, we also measure waves originating from the core with fast fusion protons or beam injected deuterons being a possible emission driver. Comparing the measured frequency values with ion cyclotron harmonics present in the plasma places the origin of this emission on the magnetic axis, with the fundamental hydrogen/second deuterium cyclotron harmonic matching the observed values. The actual values range from ∼27 MHz at the on-axis toroidal field BT = -1.79 T to ∼40 MHz at BT = -2.62 T. When the magnetic axis position evolves during this emission, the measured frequency values track the changes in the estimated on-axis cyclotron frequency values. Core ICE is usually a transient event lasting ∼100 ms during the neutral beam startup phase. However, in some cases, core emission occurs in steady-state plasmas and lasts for longer than 1 s. These observations suggest an attractive possibility of using a non-perturbing ICE-based diagnostic to passively monitor fusion alpha particles at the location of their birth in the plasma core, in deuterium-tritium burning devices such as ITER and DEMO.",
author = "R. Ochoukov and V. Bobkov and B. Chapman and R. Dendy and M. Dunne and H. Faugel and M. Garc{\'i}a-Mu{\~n}oz and B. Geiger and P. Hennequin and K.G. McClements and D. Moseev and S. Nielsen and A.N. Rasmussen and P. Schneider and M. Weiland and J.-M. Noterdaeme",
year = "2018",
doi = "10.1063/1.5035180",
language = "English",
volume = "89",
journal = "Review of Scientific Instruments",
issn = "0034-6748",
publisher = "American Institute of Physics",
number = "10",

}

RIS

TY - GEN

T1 - Observations of core ion cyclotron emission on ASDEX Upgrade tokamak

AU - Ochoukov, R.

AU - Bobkov, V.

AU - Chapman, B.

AU - Dendy, R.

AU - Dunne, M.

AU - Faugel, H.

AU - García-Muñoz, M.

AU - Geiger, B.

AU - Hennequin, P.

AU - McClements, K.G.

AU - Moseev, D.

AU - Nielsen, S.

AU - Rasmussen, A.N.

AU - Schneider, P.

AU - Weiland, M.

AU - Noterdaeme, J.-M.

PY - 2018

Y1 - 2018

N2 - The B-dot probe diagnostic suite on the ASDEX Upgrade tokamak has recently been upgraded with a new 125 MHz, 14 bit resolution digitizer to study ion cyclotron emission (ICE). While classic edge emission from the low field side plasma is often observed, we also measure waves originating from the core with fast fusion protons or beam injected deuterons being a possible emission driver. Comparing the measured frequency values with ion cyclotron harmonics present in the plasma places the origin of this emission on the magnetic axis, with the fundamental hydrogen/second deuterium cyclotron harmonic matching the observed values. The actual values range from ∼27 MHz at the on-axis toroidal field BT = -1.79 T to ∼40 MHz at BT = -2.62 T. When the magnetic axis position evolves during this emission, the measured frequency values track the changes in the estimated on-axis cyclotron frequency values. Core ICE is usually a transient event lasting ∼100 ms during the neutral beam startup phase. However, in some cases, core emission occurs in steady-state plasmas and lasts for longer than 1 s. These observations suggest an attractive possibility of using a non-perturbing ICE-based diagnostic to passively monitor fusion alpha particles at the location of their birth in the plasma core, in deuterium-tritium burning devices such as ITER and DEMO.

AB - The B-dot probe diagnostic suite on the ASDEX Upgrade tokamak has recently been upgraded with a new 125 MHz, 14 bit resolution digitizer to study ion cyclotron emission (ICE). While classic edge emission from the low field side plasma is often observed, we also measure waves originating from the core with fast fusion protons or beam injected deuterons being a possible emission driver. Comparing the measured frequency values with ion cyclotron harmonics present in the plasma places the origin of this emission on the magnetic axis, with the fundamental hydrogen/second deuterium cyclotron harmonic matching the observed values. The actual values range from ∼27 MHz at the on-axis toroidal field BT = -1.79 T to ∼40 MHz at BT = -2.62 T. When the magnetic axis position evolves during this emission, the measured frequency values track the changes in the estimated on-axis cyclotron frequency values. Core ICE is usually a transient event lasting ∼100 ms during the neutral beam startup phase. However, in some cases, core emission occurs in steady-state plasmas and lasts for longer than 1 s. These observations suggest an attractive possibility of using a non-perturbing ICE-based diagnostic to passively monitor fusion alpha particles at the location of their birth in the plasma core, in deuterium-tritium burning devices such as ITER and DEMO.

U2 - 10.1063/1.5035180

DO - 10.1063/1.5035180

M3 - Conference article

VL - 89

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

SN - 0034-6748

IS - 10

M1 - 10J101

ER -