Development of the 174 GHz collective Thomson scattering diagnostics at Wendelstein 7-X

被引：8

作者：

Ponomarenko, S. ^{[1
]}

Moseev, D. ^{[1
]}

Stange, T. ^{[1
]}

Krier, L. ^{[1
,2
]}

Stordiau, P. ^{[3
]}

Braune, H. ^{[1
]}

Gantenbein, G. ^{[2
]}

Jelonnek, J. ^{[2
]}

Kuleshov, A. ^{[4
]}

Laqua, H. P. ^{[1
]}

Lechte, C. ^{[5
]}

Marsen, S. ^{[1
]}

Nielsen, S. K. ^{[6
]}

Oosterbeek, J. W. ^{[1
]}

Plaum, B. ^{[5
]}

Ragona, R. ^{[6
]}

Rasmussen, J. ^{[6
]}

Ruess, T. ^{[2
]}

Salewski, M. ^{[6
]}

Thumm, M. ^{[2
]}

Zimmermann, J. ^{[1
]}

机构：

[1] Max Planck Inst Plasma Phys, D-17491 Greifswald, Germany

[2] Karlsruhe Inst Technol, IHM, D-76131 Karlsruhe, Germany

[3] Eindhoven Univ Technol, NL-5612 AZ Eindhoven, Netherlands

[4] O Ya Usikov Inst Radiophys & Elect, NASU, UA-61085 Kharkiv, Ukraine

[5] Univ Stuttgart, IGVP, D-70569 Stuttgart, Germany

[6] Tech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2024年 / 95卷 / 01期

关键词：

MICHELSON INTERFEROMETER; W7-X; FLUCTUATIONS; OPERATION; ECRH;

D O I：

10.1063/5.0174444

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

In this paper, we present the design and commissioning results of the upgraded collective Thomson scattering diagnostic at the Wendelstein 7-X stellarator. The diagnostic has a new radiometer designed to operate between the second and third harmonics of the electron cyclotron emission from the plasma at 171-177 GHz, where the emission background has a minimum and is of order 10-100 eV. It allows us to receive the scattered electromagnetic field with a significantly improved signal-to-noise ratio and extends the set of possible scattering geometries compared to the case of the original instrument operated at 140 GHz. The elements of the diagnostic are a narrowband notch filter and a frequency stabilized probing gyrotron that will allow measuring scattered radiation spectra very close to the probing frequency. Here, we characterize the microwave components applied to the radiometer and demonstrate the performance of the complete system that was achieved during the latest experimental campaign, OP2.1.

引用

页数：11

共 36 条

[1] Forward modeling of collective Thomson scattering for Wendelstein 7-X plasmas: Electrostatic approximation [J].

Abramovic, I. ;

Pavone, A. ;

Moseev, D. ;

Cardozo, N. J. Lopes ;

Salewski, M. ;

Laqua, H. P. ;

Stejner, M. ;

Stange, T. ;

Marsen, S. ;

Nielsen, S. K. ;

Jensen, T. ;

Kasparek, W. ;

Wolf, R. C. ;

Ali, A. ;

Alonso, A. ;

Baldzuhn, J. ;

Beidler, C. ;

Beurskens, M. ;

Biedermann, C. ;

Bosch, H. -S. ;

Bozhenkov, S. ;

Brakel, R. ;

Dinklage, A. ;

Feng, Y. ;

Fuchert, G. ;

Geiger, J. ;

Grulke, O. ;

Helander, P. ;

Hirsch, M. ;

Hoefel, U. ;

Jakubowski, M. ;

Knauer, J. ;

Kocsis, G. ;

Koenig, R. ;

Kornejew, P. ;

Kraemer-Flecken, A. ;

Krychowiak, M. ;

Landreman, M. ;

Langenberg, A. ;

Laqua, H. P. ;

Lazerson, S. ;

Maassberg, H. ;

Marsen, S. ;

Marushchenko, M. ;

Moseev, D. ;

Niemann, H. ;

Pablant, N. ;

Pasch, E. ;

Rahbarnia, K. ;

Schlisio, G. .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2019, 90 (02)

[2]

Bahl I., 2011, Handbook of RF and Microwave Power Amplifiers, P357

[3] A quantitative study of scattering from electromagnetic fluctuations in plasmas [J].

Bindslev, H .

JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS, 1996, 58 (8-9) :983-989

[4] Investigation of higher harmonics of electron cyclotron emission using Fourier transform spectroscopy in Wendelstein 7-X [J].

Chaudhary, N. ;

Oosterbeek, J. W. ;

Hirsch, M. ;

Hoefel, U. ;

Wolf, R. C. .

JOURNAL OF INSTRUMENTATION, 2020, 15 (09)

[5] Electron temperature profile from optically grey X3-mode of electron cyclotron emission at Wendelstein 7-X using Bayesian analysis [J].

Chaudhary, Neha ;

Hirsch, Matthias ;

Hoefel, Udo ;

Oosterbeek, Johan W. ;

Marushchenko, Nikolai B. ;

Wolf, Robert C. .

PLASMA PHYSICS AND CONTROLLED FUSION, 2022, 64 (05)

[6] PLASMA IMPURITIES AND COOLING [J].

DRAWIN, HW .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1978, 37 (02) :125-163

[7] Electron cyclotron heating for W7-X: Physics and technology [J].

Erckmann, V. ;

Brand, P. ;

Braune, H. ;

Dammertz, G. ;

Gantenbein, G. ;

Kasparek, W. ;

Laqua, H. P. ;

Maassberg, H. ;

Marushchenko, N. B. ;

Michel, G. ;

Thumm, M. ;

Turkin, Y. ;

Weissgerber, M. ;

Weller, A. .

FUSION SCIENCE AND TECHNOLOGY, 2007, 52 (02) :291-312

[8] ECRH FOR W7-X: TRANSMISSION LOSSES OF HIGH-POWER 140-GHz WAVE BEAMS [J].

Erckmann, V. ;

Kasparek, W. ;

Gantenbein, G. ;

Hollmann, F. ;

Jonitz, L. ;

Noke, F. ;

Purps, F. ;

Weissgerber, M. .

FUSION SCIENCE AND TECHNOLOGY, 2009, 55 (01) :16-22

[9] Design and performance of the collective Thomson scattering receiver at ASDEX Upgrade [J].

Furtula, V. ;

Salewski, M. ;

Leipold, F. ;

Michelsen, P. K. ;

Korsholm, S. B. ;

Meo, F. ;

Moseev, D. ;

Nielsen, S. K. ;

Stejner, M. ;

Johansen, T. .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2012, 83 (01)

[10] ECE Diagnostic for the initial Operation of Wendelstein 7-X [J].

Hirsch, Matthias ;

Hoefel, Udo ;

Oosterbeek, Johan Willem ;

Chaudhary, Neha ;

Geiger, Joachim ;

Hartfuss, Hans-Juergen ;

Kasparek, Walter ;

Marushchenko, Nikolai ;

van Milligen, Boudewijn ;

Plaum, Burkhard ;

Stange, Torsten ;

Svensson, Jakob ;

Tsuchiya, Hayato ;

Wagner, Dietmar ;

McWeir, Gavin ;

Wolf, Robert .

20TH JOINT WORKSHOP ON ELECTRON CYCLOTRON EMISSION AND ELECTRON CYCLOTRON RESONANCE HEATING (EC20), 2019, 203

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