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Papers by Erekle Tsakadze

Fusion Engineering and Design, 2007

At the TEXTOR tokamak a 140 GHz, 800 kW, 10 s gyrotron is employed for studies on ECW heating and... more At the TEXTOR tokamak a 140 GHz, 800 kW, 10 s gyrotron is employed for studies on ECW heating and ECCD. A key program is the suppression of tearing modes, which is aided by the unique facility at TEXTOR to program magnetic structures during a discharge (DED). A scheme is under development which aims to detect the perturbations on the electron cyclotron emission caused by these instabilities via the same line of sight as is used by the ECRH beam, and to use this information for feedback control of the instability. A brief overview of TEXTOR and relevant island parameters is given as well as a description of the upgraded ECRH system. This is followed by a description of the design of the transmission line coupler and receiver for island detection which constitutes the main topic of the paper. The final section sketches the feedback controller that processes the receiver signals, and controls the moveable launcher and the gyrotron power.

Proceedings of the 14th …, 2006

Fusion Science and Technology, 2005

The diagnostic system of TEXTOR comprises about 50 individual diagnostic devices. Since the start... more The diagnostic system of TEXTOR comprises about 50 individual diagnostic devices. Since the start of the Trilateral Euregio Cluster collaboration, part of the emphasis in the experimental program has shifted toward the study of physics processes in the plasma core. To aid these studies several new and advanced core diagnostics have been implemented, whereas a number of other core diagnostics have been upgraded to higher resolution, more channels, and better accuracy. In this paper a brief overview is given of the present set of plasma core diagnostics at TEXTOR.

F.Meo H.Bindslev, J.A.Hoekzema , S.B.Korsholm, F.Leuterer , P.K.Michelsen, S.Michelsen, S.K.Niels... more F.Meo H.Bindslev, J.A.Hoekzema , S.B.Korsholm, F.Leuterer , P.K.Michelsen, S.Michelsen, S.K.Nielsen, E.L.Tsakadze , E.Westerhof , P.Woskov, and the ECRH teams at FOM-Institute for Plasma Physics and Max-Planck-Institut für Plasmaphysik 1. Association EURATOM-Risø National Laboratory, DK-4000 Roskilde, Denmark 2. MIT Plasma Science and Fusion Center, Cambridge, MA 0213,USA 3. Association EURATOM-Forschungszentrum Jülich GmbH, Institut für Plasmaphysik, Trilateral Euregio Cluster, D-52428 Jülich, Germany 4. Max-Planck-Institut für Plasmaphysik, EURATOM Association, Garching, Germany 5. FOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, Trilateral Euregio Cluster, The Netherlands, www.rijnh.nl

S. B. Korsholm , H. Bindslev, J. Egedal, J. A. Hoekzema, F. Leuterer, F. Meo, P. K. Michelsen, E.... more S. B. Korsholm , H. Bindslev, J. Egedal, J. A. Hoekzema, F. Leuterer, F. Meo, P. K. Michelsen, E. L. Tsakadze, and P. Woskov Association EURATOM-Riso National Laboratory, DK-4000 Roskilde, Denmark MIT Plasma Science and Fusion Center, Cambridge, MA 02139, Massachusetts, USA Association EURATOM-Forschungszentrum Julich GmbH, Institut fur Plasmaphysik, D-52428 Julich, Germany Max-Planck-Institut fur Plasmaphysik, EURATOM Association, D-85748 Garching, Germany

Fusion Engineering and Design, 2007

At the TEXTOR tokamak a 140 GHz, 800 kW, 10 s gyrotron is employed for studies on ECW heating and... more At the TEXTOR tokamak a 140 GHz, 800 kW, 10 s gyrotron is employed for studies on ECW heating and ECCD. A key program is the suppression of tearing modes, which is aided by the unique facility at TEXTOR to program magnetic structures during a discharge (DED). A scheme is under development which aims to detect the perturbations on the electron cyclotron emission caused by these instabilities via the same line of sight as is used by the ECRH beam, and to use this information for feedback control of the instability. A brief overview of TEXTOR and relevant island parameters is given as well as a description of the upgraded ECRH system. This is followed by a description of the design of the transmission line coupler and receiver for island detection which constitutes the main topic of the paper. The final section sketches the feedback controller that processes the receiver signals, and controls the moveable launcher and the gyrotron power.

Proceedings of the 14th …, 2006

Fusion Science and Technology, 2005

The diagnostic system of TEXTOR comprises about 50 individual diagnostic devices. Since the start... more The diagnostic system of TEXTOR comprises about 50 individual diagnostic devices. Since the start of the Trilateral Euregio Cluster collaboration, part of the emphasis in the experimental program has shifted toward the study of physics processes in the plasma core. To aid these studies several new and advanced core diagnostics have been implemented, whereas a number of other core diagnostics have been upgraded to higher resolution, more channels, and better accuracy. In this paper a brief overview is given of the present set of plasma core diagnostics at TEXTOR.

F.Meo H.Bindslev, J.A.Hoekzema , S.B.Korsholm, F.Leuterer , P.K.Michelsen, S.Michelsen, S.K.Niels... more F.Meo H.Bindslev, J.A.Hoekzema , S.B.Korsholm, F.Leuterer , P.K.Michelsen, S.Michelsen, S.K.Nielsen, E.L.Tsakadze , E.Westerhof , P.Woskov, and the ECRH teams at FOM-Institute for Plasma Physics and Max-Planck-Institut für Plasmaphysik 1. Association EURATOM-Risø National Laboratory, DK-4000 Roskilde, Denmark 2. MIT Plasma Science and Fusion Center, Cambridge, MA 0213,USA 3. Association EURATOM-Forschungszentrum Jülich GmbH, Institut für Plasmaphysik, Trilateral Euregio Cluster, D-52428 Jülich, Germany 4. Max-Planck-Institut für Plasmaphysik, EURATOM Association, Garching, Germany 5. FOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, Trilateral Euregio Cluster, The Netherlands, www.rijnh.nl

S. B. Korsholm , H. Bindslev, J. Egedal, J. A. Hoekzema, F. Leuterer, F. Meo, P. K. Michelsen, E.... more S. B. Korsholm , H. Bindslev, J. Egedal, J. A. Hoekzema, F. Leuterer, F. Meo, P. K. Michelsen, E. L. Tsakadze, and P. Woskov Association EURATOM-Riso National Laboratory, DK-4000 Roskilde, Denmark MIT Plasma Science and Fusion Center, Cambridge, MA 02139, Massachusetts, USA Association EURATOM-Forschungszentrum Julich GmbH, Institut fur Plasmaphysik, D-52428 Julich, Germany Max-Planck-Institut fur Plasmaphysik, EURATOM Association, D-85748 Garching, Germany