Implementation of the new multichannel X-mode edge density profile reflectometer for the ICRF antenna on ASDEX Upgrade

D.E. Aguiam, A. Silva, V. Bobkov, P.J. Carvalho, P.F. Carvalho, R. Cavazzana, G.D. Conway, O. D'Arcangelo, L. Fattorini, H. Faugel, A. Fernandes, H. F�nfgelder, B. Gon�alves, L. Guimarais, G. De Masi, L. Meneses, J.M. Noterdaeme, R.C. Pereira, G. Rocchi, J.M. SantosA.A. Tuccillo, O. Tudisco

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Abstract

A new multichannel frequency modulated continuous-wave reflectometry diagnostic has been successfully installed and commissioned on ASDEX Upgrade to measure the plasma edge electron density profile evolution in front of the Ion Cyclotron Range of Frequencies (ICRF) antenna. The design of the new three-strap ICRF antenna integrates ten pairs (sending and receiving) of microwave reflectometry antennas. The multichannel reflectometer can use three of these to measure the edge electron density profiles up to 2 � 1019m-3, at different poloidal locations, allowing the direct study of the local plasma layers in front of the ICRF antenna. ICRF power coupling, operational effects, and poloidal variations of the plasma density profile can be consistently studied for the first time. In this work the diagnostic hardware architecture is described and the obtained density profile measurements were used to track outer radial plasma position and plasma shape.
Original languageEnglish
Article number11E722
Pages (from-to)-
JournalReview of Scientific Instruments
Volume87
Issue number11
DOIs
Publication statusPublished - 1 Nov 2016
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Instrumentation

Cite this

Aguiam, D. E., Silva, A., Bobkov, V., Carvalho, P. J., Carvalho, P. F., Cavazzana, R., Conway, G. D., D'Arcangelo, O., Fattorini, L., Faugel, H., Fernandes, A., F�nfgelder, H., Gon�alves, B., Guimarais, L., De Masi, G., Meneses, L., Noterdaeme, J. M., Pereira, R. C., Rocchi, G., ... Tudisco, O. (2016). Implementation of the new multichannel X-mode edge density profile reflectometer for the ICRF antenna on ASDEX Upgrade. Review of Scientific Instruments, 87(11), -. [11E722]. https://doi.org/10.1063/1.4961558