Status of the new multi-frequency ECRH system for ASDEX Upgrade

D. Wagner; G. Grünwald; F. Leuterer; A. Manini; F. Monaco; M. Münich; H. Schütz; J. Stober; H. Zohm; T. Franke; M. Thumm; G. Gantenbein; R. Heidinger; A. Meier; W. Kasparek; C. Lechte; A. Litvak; G.G. Denisov; A.V. Chirkov; E.M. Tai; L.G. Popov; V.O. Nichiporenko; V.E. Myasnikov; E.A. Solyanova; S.A. Malygin; Fernando Meo; P. Woskov

doi:10.1088/0029-5515/48/5/054006

Status of the new multi-frequency ECRH system for ASDEX Upgrade

D. Wagner, G. Grünwald, F. Leuterer, A. Manini, F. Monaco, M. Münich, H. Schütz, J. Stober, H. Zohm, T. Franke, M. Thumm, G. Gantenbein, R. Heidinger, A. Meier, W. Kasparek, C. Lechte, A. Litvak, G.G. Denisov, A.V. Chirkov, E.M. TaiL.G. Popov, V.O. Nichiporenko, V.E. Myasnikov, E.A. Solyanova, S.A. Malygin, Fernando Meo, P. Woskov

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Currently, a new multi-frequency ECRH system is under construction at the ASDEX Upgrade tokamak experiment. This system employs, for the first time in a fusion device, multi-frequency gyrotrons, step-tunable in the range 105-140 GHz. The first two gyrotrons, working at 105 and 140 GHz, were installed and tested. The matching optics unit includes a set of phase correcting mirrors for each frequency as well as a pair of broadband polarizer mirrors. The transmission line consists of non-evacuated corrugated HE11 waveguides with an inner diameter (113) of 87 mm and has a total length of about 70 m. Transmission losses were deducted from calorimetric measurements both at the beginning and at the end of the transmission line at both frequencies and are in reasonable agreement with theory. Two transmission lines are completed so far and first plasma experiments with the new system have started. The first gyrotron Odissey-1 is currently being equipped with a broadband chemical vapour deposition (CVD) diamond Brewster output window and will become a step-tunable gyrotron with the additional frequencies 117 and 127 GHz. A tunable double-disc CVD-diamond window will be mounted at the torus. The system includes fast steerable launchers at the front end that will allow very localized feedback controlled power deposition in the plasma.

Original language	English
Journal	Nuclear Fusion
Volume	48
Issue number	5
Pages (from-to)	6
ISSN	0029-5515
DOIs	https://doi.org/10.1088/0029-5515/48/5/054006
Publication status	Published - 2008

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Wagner, D., Grünwald, G., Leuterer, F., Manini, A., Monaco, F., Münich, M., Schütz, H., Stober, J., Zohm, H., Franke, T., Thumm, M., Gantenbein, G., Heidinger, R., Meier, A., Kasparek, W., Lechte, C., Litvak, A., Denisov, G. G., Chirkov, A. V., ... Woskov, P. (2008). Status of the new multi-frequency ECRH system for ASDEX Upgrade. Nuclear Fusion, 48(5), 6. https://doi.org/10.1088/0029-5515/48/5/054006

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abstract = "Currently, a new multi-frequency ECRH system is under construction at the ASDEX Upgrade tokamak experiment. This system employs, for the first time in a fusion device, multi-frequency gyrotrons, step-tunable in the range 105-140 GHz. The first two gyrotrons, working at 105 and 140 GHz, were installed and tested. The matching optics unit includes a set of phase correcting mirrors for each frequency as well as a pair of broadband polarizer mirrors. The transmission line consists of non-evacuated corrugated HE11 waveguides with an inner diameter (113) of 87 mm and has a total length of about 70 m. Transmission losses were deducted from calorimetric measurements both at the beginning and at the end of the transmission line at both frequencies and are in reasonable agreement with theory. Two transmission lines are completed so far and first plasma experiments with the new system have started. The first gyrotron Odissey-1 is currently being equipped with a broadband chemical vapour deposition (CVD) diamond Brewster output window and will become a step-tunable gyrotron with the additional frequencies 117 and 127 GHz. A tunable double-disc CVD-diamond window will be mounted at the torus. The system includes fast steerable launchers at the front end that will allow very localized feedback controlled power deposition in the plasma.",

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Wagner, D, Grünwald, G, Leuterer, F, Manini, A, Monaco, F, Münich, M, Schütz, H, Stober, J, Zohm, H, Franke, T, Thumm, M, Gantenbein, G, Heidinger, R, Meier, A, Kasparek, W, Lechte, C, Litvak, A, Denisov, GG, Chirkov, AV, Tai, EM, Popov, LG, Nichiporenko, VO, Myasnikov, VE, Solyanova, EA, Malygin, SA, Meo, F & Woskov, P 2008, 'Status of the new multi-frequency ECRH system for ASDEX Upgrade', Nuclear Fusion, vol. 48, no. 5, pp. 6. https://doi.org/10.1088/0029-5515/48/5/054006

TY - JOUR

T1 - Status of the new multi-frequency ECRH system for ASDEX Upgrade

AU - Wagner, D.

AU - Grünwald, G.

AU - Leuterer, F.

AU - Manini, A.

AU - Monaco, F.

AU - Münich, M.

AU - Schütz, H.

AU - Stober, J.

AU - Zohm, H.

AU - Franke, T.

AU - Thumm, M.

AU - Gantenbein, G.

AU - Heidinger, R.

AU - Meier, A.

AU - Kasparek, W.

AU - Lechte, C.

AU - Litvak, A.

AU - Denisov, G.G.

AU - Chirkov, A.V.

AU - Tai, E.M.

AU - Popov, L.G.

AU - Nichiporenko, V.O.

AU - Myasnikov, V.E.

AU - Solyanova, E.A.

AU - Malygin, S.A.

AU - Meo, Fernando

AU - Woskov, P.

PY - 2008

Y1 - 2008

N2 - Currently, a new multi-frequency ECRH system is under construction at the ASDEX Upgrade tokamak experiment. This system employs, for the first time in a fusion device, multi-frequency gyrotrons, step-tunable in the range 105-140 GHz. The first two gyrotrons, working at 105 and 140 GHz, were installed and tested. The matching optics unit includes a set of phase correcting mirrors for each frequency as well as a pair of broadband polarizer mirrors. The transmission line consists of non-evacuated corrugated HE11 waveguides with an inner diameter (113) of 87 mm and has a total length of about 70 m. Transmission losses were deducted from calorimetric measurements both at the beginning and at the end of the transmission line at both frequencies and are in reasonable agreement with theory. Two transmission lines are completed so far and first plasma experiments with the new system have started. The first gyrotron Odissey-1 is currently being equipped with a broadband chemical vapour deposition (CVD) diamond Brewster output window and will become a step-tunable gyrotron with the additional frequencies 117 and 127 GHz. A tunable double-disc CVD-diamond window will be mounted at the torus. The system includes fast steerable launchers at the front end that will allow very localized feedback controlled power deposition in the plasma.

AB - Currently, a new multi-frequency ECRH system is under construction at the ASDEX Upgrade tokamak experiment. This system employs, for the first time in a fusion device, multi-frequency gyrotrons, step-tunable in the range 105-140 GHz. The first two gyrotrons, working at 105 and 140 GHz, were installed and tested. The matching optics unit includes a set of phase correcting mirrors for each frequency as well as a pair of broadband polarizer mirrors. The transmission line consists of non-evacuated corrugated HE11 waveguides with an inner diameter (113) of 87 mm and has a total length of about 70 m. Transmission losses were deducted from calorimetric measurements both at the beginning and at the end of the transmission line at both frequencies and are in reasonable agreement with theory. Two transmission lines are completed so far and first plasma experiments with the new system have started. The first gyrotron Odissey-1 is currently being equipped with a broadband chemical vapour deposition (CVD) diamond Brewster output window and will become a step-tunable gyrotron with the additional frequencies 117 and 127 GHz. A tunable double-disc CVD-diamond window will be mounted at the torus. The system includes fast steerable launchers at the front end that will allow very localized feedback controlled power deposition in the plasma.

KW - Energiteknologier på vej

U2 - 10.1088/0029-5515/48/5/054006

DO - 10.1088/0029-5515/48/5/054006

M3 - Journal article

SN - 0029-5515

VL - 48

SP - 6

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 5

ER -

Status of the new multi-frequency ECRH system for ASDEX Upgrade

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