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

[21] Collective Thomson scattering diagnostic at Wendelstein 7-X [J].

Moseev, D. ;

Stejner, M. ;

Stange, T. ;

Abramovic, I. ;

Laqua, H. P. ;

Marsen, S. ;

Schneider, N. ;

Braune, H. ;

Hoefel, U. ;

Kasparek, W. ;

Korsholm, S. B. ;

Lechte, C. ;

Leipold, F. ;

Nielsen, S. K. ;

Salewski, M. ;

Rasmussen, J. ;

Weissgerber, M. ;

Wolf, R. C. .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2019, 90 (01)

[22] Temporal evolution of confined fast-ion velocity distributions measured by collective Thomson scattering in TEXTOR [J].

Nielsen, S. K. ;

Bindslev, H. ;

Porte, L. ;

Hoekzema, J. A. ;

Korsholm, S. B. ;

Leipold, F. ;

Meo, F. ;

Michelsen, P. K. ;

Michelsen, S. ;

Oosterbeek, J. W. ;

Tsakadze, E. L. ;

Van Wassenhove, G. ;

Westerhof, E. ;

Woskov, P. .

PHYSICAL REVIEW E, 2008, 77 (01)

[23] Spectrum response and analysis of 77 GHz band collective Thomson scattering diagnostic for bulk and fast ions in LHD plasmas [J].

Nishiura, M. ;

Kubo, S. ;

Tanaka, K. ;

Seki, R. ;

Ogasawara, S. ;

Shimozuma, T. ;

Okada, K. ;

Kobayashi, S. ;

Mutoh, T. ;

Kawahata, K. ;

Watari, T. ;

Saito, T. ;

Tatematsu, Y. ;

Korsholm, S. B. ;

Salewski, M. .

NUCLEAR FUSION, 2014, 54 (02)

[24] Michelson Interferometer design in ECW heated plasmas and initial results [J].

Oosterbeek, J. W. ;

Chaudhary, N. ;

Hirsch, M. ;

Beurskens, M. N. A. ;

Hotel, U. ;

Card, A. ;

Marquardt, M. ;

Marsen, S. ;

Stern, M. ;

Wolf, R. C. .

FUSION ENGINEERING AND DESIGN, 2019, 146 :959-962

[25] Assessment of ECH stray radiation levels at the W7-X Michelson Interferometer and Profile Reflectometer [J].

Oosterbeek, Johan W. ;

Chaudhary, Neha ;

Hirsch, Matthias ;

Hoefel, Udo ;

Wolf, Robert C. .

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

[26]

Ponomarenko S, 2022, 2022 IEEE 2ND UKRAINIAN MICROWAVE WEEK, UKRMW, P242, DOI [10.1109/UKRMW58013.2022.10037162, 10.1109/UkrMW58013.2022.10037162]

[27] Consistency between real and synthetic fast-ion measurements at ASDEX Upgrade [J].

Rasmussen, J. ;

Nielsen, S. K. ;

Stejner, M. ;

Geiger, B. ;

Salewski, M. ;

Jacobsen, A. S. ;

Korsholm, S. B. ;

Leipold, F. ;

Michelsen, P. K. ;

Moseev, D. ;

Schubert, M. ;

Stober, J. ;

Tardini, G. ;

Wagner, D. .

PLASMA PHYSICS AND CONTROLLED FUSION, 2015, 57 (07)

[28] Alpha-particle velocity-space diagnostic in ITER [J].

Salewski, M. ;

Nocente, M. ;

Madsen, B. ;

Abramovic, I ;

Fitzgerald, M. ;

Gorini, G. ;

Hansen, P. C. ;

Heidbrink, W. W. ;

Jacobsen, A. S. ;

Jensen, T. ;

Kiptily, V. G. ;

Klinkby, E. B. ;

Korsholm, S. B. ;

Kurki-Suonio, T. ;

Larsen, A. W. ;

Leipold, F. ;

Moseev, D. ;

Nielsen, S. K. ;

Pinches, S. D. ;

Rasmussen, J. ;

Rebai, M. ;

Schneider, M. ;

Shevelev, A. ;

Sipila, S. ;

Stejner, M. ;

Tardocchi, M. .

NUCLEAR FUSION, 2018, 58 (09)

[29] Comparison of fast ion collective Thomson scattering measurements at ASDEX Upgrade with numerical simulations [J].

Salewski, M. ;

Meo, F. ;

Stejner, M. ;

Asunta, O. ;

Bindslev, H. ;

Furtula, V. ;

Korsholm, S. B. ;

Kurki-Suonio, T. ;

Leipold, F. ;

Leuterer, F. ;

Michelsen, P. K. ;

Moseev, D. ;

Nielsen, S. K. ;

Stober, J. ;

Tardini, G. ;

Wagner, D. ;

Woskov, P. .

NUCLEAR FUSION, 2010, 50 (03)

[30] ELECTRON DENSITY FLUCTUATIONS IN A PLASMA [J].

SALPETER, EE .

PHYSICAL REVIEW, 1960, 120 (05) :1528-1535

← 1 2 3 4 →