Synthetic Mirnov diagnostic for the validation of experimental observations
A synthetic Mirnov diagnostic has been developed to investigate the capabilities and limitations of an arrangement of Mirnov coils in terms of a mode analysis. Eight test cases have been developed, with different coil arrangements and magnetic field configurations. Three of those cases are experimen...
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| Veröffentlicht in: | Review of scientific instruments 2024-02, Vol.95 (2) |
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| creator | Büschel, C. Kleiber, R. Könies, A. Drevlak, M. Borchardt, M. Rahbarnia, K. Thomsen, H. Vaz Mendes, S. Brandt, C. Knauer, J. Brunner, K. J. |
| description | A synthetic Mirnov diagnostic has been developed to investigate the capabilities and limitations of an arrangement of Mirnov coils in terms of a mode analysis. Eight test cases have been developed, with different coil arrangements and magnetic field configurations. Three of those cases are experimental configurations of the stellarator Wendelstein 7-X. It is observed that, for a high triangularity of the flux surfaces, the arrangement of the coils plays a significant role in the exact determination of the poloidal mode number. For the mode analysis, torus and magnetic coordinates have been used. In most cases, the reconstruction of the poloidal mode number of a prescribed mode was found to be more accurate in magnetic coordinates. As an application, the signal of an Alfvén eigenmode, which has been calculated with a three-dimensional magnetohydrodynamics code, is compared to experimental observations at Wendelstein 7-X. For the chosen example, the calculated and measured mode spectra agree very well and additional information on the toroidal mode number and localization of the mode has been inferred. |
| doi_str_mv | 10.1063/5.0190619 |
| format | Article |
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As an application, the signal of an Alfvén eigenmode, which has been calculated with a three-dimensional magnetohydrodynamics code, is compared to experimental observations at Wendelstein 7-X. For the chosen example, the calculated and measured mode spectra agree very well and additional information on the toroidal mode number and localization of the mode has been inferred.</description><identifier>ISSN: 0034-6748</identifier><identifier>EISSN: 1089-7623</identifier><identifier>DOI: 10.1063/5.0190619</identifier><identifier>PMID: 38391285</identifier><identifier>CODEN: RSINAK</identifier><language>eng</language><publisher>United States: American Institute of Physics</publisher><subject>Coils ; Magnetic field configurations ; Magnetohydrodynamics ; Mathematical analysis ; Toruses</subject><ispartof>Review of scientific instruments, 2024-02, Vol.95 (2)</ispartof><rights>Author(s)</rights><rights>2024 Author(s). 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J.</creatorcontrib><creatorcontrib>Wendelstein 7-X Team</creatorcontrib><title>Synthetic Mirnov diagnostic for the validation of experimental observations</title><title>Review of scientific instruments</title><addtitle>Rev Sci Instrum</addtitle><description>A synthetic Mirnov diagnostic has been developed to investigate the capabilities and limitations of an arrangement of Mirnov coils in terms of a mode analysis. Eight test cases have been developed, with different coil arrangements and magnetic field configurations. Three of those cases are experimental configurations of the stellarator Wendelstein 7-X. It is observed that, for a high triangularity of the flux surfaces, the arrangement of the coils plays a significant role in the exact determination of the poloidal mode number. For the mode analysis, torus and magnetic coordinates have been used. In most cases, the reconstruction of the poloidal mode number of a prescribed mode was found to be more accurate in magnetic coordinates. As an application, the signal of an Alfvén eigenmode, which has been calculated with a three-dimensional magnetohydrodynamics code, is compared to experimental observations at Wendelstein 7-X. For the chosen example, the calculated and measured mode spectra agree very well and additional information on the toroidal mode number and localization of the mode has been inferred.</description><subject>Coils</subject><subject>Magnetic field configurations</subject><subject>Magnetohydrodynamics</subject><subject>Mathematical analysis</subject><subject>Toruses</subject><issn>0034-6748</issn><issn>1089-7623</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><recordid>eNp9kMtOwzAQRS0EoqWw4AdQJFYgpYzj9xJV5SGKWABry3YcSNXGxU4r-vekD1gym5HmHt2ZuQidYxhi4OSGDQEr4FgdoD4GqXLBC3KI-gCE5lxQ2UMnKU2hK4bxMeoRSRQuJOujp9d10376tnbZcx2bsMrK2nw0IW0mVYhZJ2YrM6tL09ahyUKV-e-Fj_XcN62ZZcEmH1dbLZ2io8rMkj_b9wF6vxu_jR7yycv94-h2kjvCoM2lslJWBQhDLcGWC4YNEYzSsmKcWy99hW1BQSjKZOmc9QS8dwo74FSRkgzQ5c53EcPX0qdWT8MyNt1KXSgCShScQUdd7SgXQ0rRV3rRXW3iWmPQm9g00_vYOvZi77i0c1_-kb85dcD1Dkiubrff_uP2A5PudIc</recordid><startdate>20240201</startdate><enddate>20240201</enddate><creator>Büschel, C.</creator><creator>Kleiber, R.</creator><creator>Könies, A.</creator><creator>Drevlak, M.</creator><creator>Borchardt, M.</creator><creator>Rahbarnia, K.</creator><creator>Thomsen, H.</creator><creator>Vaz Mendes, S.</creator><creator>Brandt, C.</creator><creator>Knauer, J.</creator><creator>Brunner, K. 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| subjects | Coils Magnetic field configurations Magnetohydrodynamics Mathematical analysis Toruses |
| title | Synthetic Mirnov diagnostic for the validation of experimental observations |
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