Real-time diamagnetic flux measurements on ASDEX Upgrade

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dc.contributor.authorGiannone, L.
dc.contributor.authorGeiger, B.
dc.contributor.authorBilato, R.
dc.contributor.authorMaraschek, M.
dc.contributor.authorOdstrčil, T.
dc.contributor.authorFischer, R.
dc.contributor.authorFuchs, J. C.
dc.contributor.authorMcCarthy, Patrick J.
dc.contributor.authorMertens, V.
dc.contributor.authorSchuhbeck, K. H.
dc.contributor.funderH2020 Euratomen
dc.date.accessioned2017-05-15T11:05:44Z
dc.date.available2017-05-15T11:05:44Z
dc.date.issued2016-05-24
dc.description.abstractReal-time diamagnetic flux measurements are now available on ASDEX Upgrade. In contrast to the majority of diamagnetic flux measurements on other tokamaks, no analog summation of signals is necessary for measuring the change in toroidal flux or for removing contributions arising from unwanted coupling to the plasma and poloidal field coil currents. To achieve the highest possible sensitivity, the diamagnetic measurement and compensation coil integrators are triggered shortly before plasma initiation when the toroidal field coil current is close to its maximum. In this way, the integration time can be chosen to measure only the small changes in flux due to the presence of plasma. Two identical plasma discharges with positive and negative magnetic field have shown that the alignment error with respect to the plasma current is negligible. The measured diamagnetic flux is compared to that predicted by TRANSP simulations. The poloidal beta inferred from the diamagnetic flux measurement is compared to the values calculated from magnetic equilibrium reconstruction codes. The diamagnetic flux measurement and TRANSP simulation can be used together to estimate the coupled power in discharges with dominant ion cyclotron resonance heating.en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid053509
dc.identifier.citationGiannone, L., Geiger, B., Bilato, R., Maraschek, M., Odstrčil, T., Fischer, R., Fuchs, J. C., McCarthy, P. J., Mertens, V. and Schuhbeck, K.H. (2016) ‘Real-time diamagnetic flux measurements on ASDEX Upgrade’, Review of Scientific Instruments, 87, 053509 (8pp). doi:10.1063/1.4950858en
dc.identifier.doi10.1063/1.4950858
dc.identifier.endpage8en
dc.identifier.issn0034-6748
dc.identifier.journaltitleAIP Review of Scientific Instrumentsen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/3962
dc.identifier.volume87en
dc.language.isoenen
dc.publisherAIP Publishingen
dc.relation.projectinfo:eu-repo/grantAgreement/EC/H2020::COFUND-EJP/633053/EU/Implementation of activities described in the Roadmap to Fusion during Horizon 2020 through a Joint programme of the members of the EUROfusion consortium/EUROfusionen
dc.rights© 2017, the Authors. Reproduced with the permission of AIP Publishing from Review of Scientific Instruments 87, 053509; doi: 10.1063/1.4950858en
dc.subjectDiamagnetic fluxen
dc.subjectMeasurementen
dc.subjectPlasmaen
dc.titleReal-time diamagnetic flux measurements on ASDEX Upgradeen
dc.typeArticle (peer-reviewed)en
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