Real-time diamagnetic flux measurements on ASDEX Upgrade

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dc.contributor.author Giannone, L.
dc.contributor.author Geiger, B.
dc.contributor.author Bilato, R.
dc.contributor.author Maraschek, M.
dc.contributor.author Odstrčil, T.
dc.contributor.author Fischer, R.
dc.contributor.author Fuchs, J. C.
dc.contributor.author McCarthy, Patrick J.
dc.contributor.author Mertens, V.
dc.contributor.author Schuhbeck, K. H.
dc.date.accessioned 2017-05-15T11:05:44Z
dc.date.available 2017-05-15T11:05:44Z
dc.date.issued 2016-05-24
dc.identifier.citation Giannone, 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:10.1063/1.4950858 en
dc.identifier.volume 87 en
dc.identifier.startpage 1 en
dc.identifier.endpage 8 en
dc.identifier.issn 0034-6748
dc.identifier.uri http://hdl.handle.net/10468/3962
dc.identifier.doi 10.1063/1.4950858
dc.description.abstract Real-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.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher AIP Publishing en
dc.rights © 2017, the Authors. Reproduced with the permission of AIP Publishing from Review of Scientific Instruments 87, 053509; doi: 10.1063/1.4950858 en
dc.subject Diamagnetic flux en
dc.subject Measurement en
dc.subject Plasma en
dc.title Real-time diamagnetic flux measurements on ASDEX Upgrade en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Patrick J. McCarthy, Physics, University College Cork, Cork, Ireland. T: +353-21-490-3000 E: pjm@ucc.ie en
dc.internal.availability Full text available en
dc.check.info Access to this article is restricted until 12 months after publication by request of the publisher. en
dc.check.date 2017-05-24
dc.description.version Published Version en
dc.contributor.funder H2020 Euratom en
dc.description.status Peer reviewed en
dc.identifier.journaltitle AIP Review of Scientific Instruments en
dc.internal.IRISemailaddress pjm@ucc.ie en
dc.identifier.articleid 053509
dc.relation.project info: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/EUROfusion en


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