Evaluation of the Faraday angle by numerical methods and comparison with the Tore Supra and JET polarimeter electronics
On the Tore Supra tokamak, a far infrared polarimeter diagnostic has been routinely used for diagnosing the current density by measuring the Faraday rotation angle. A high precision of measurement is needed to correctly reconstruct the current profile. To reach this precision, electronics used to co...
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| Veröffentlicht in: | Review of scientific instruments 2011-04, Vol.82 (4), p.043502-043502-8 |
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| container_end_page | 043502-8 |
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| container_issue | 4 |
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| container_title | Review of scientific instruments |
| container_volume | 82 |
| creator | Brault, C. Gil, C. Boboc, A. Spuig, P. |
| description | On the Tore Supra tokamak, a far infrared polarimeter diagnostic has been routinely used for diagnosing the current density by measuring the Faraday rotation angle. A high precision of measurement is needed to correctly reconstruct the current profile. To reach this precision, electronics used to compute the phase and the amplitude of the detected signals must have a good resilience to the noise in the measurement. In this article, the analogue card's response to the noise coming from the detectors and their impact on the Faraday angle measurements are analyzed, and we present numerical methods to calculate the phase and the amplitude. These validations have been done using real signals acquired by Tore Supra and JET experiments. These methods have been developed to be used in real-time in the future numerical cards that will replace the Tore Supra present analogue ones |
| doi_str_mv | 10.1063/1.3570621 |
| format | Article |
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| identifier | ISSN: 0034-6748 |
| ispartof | Review of scientific instruments, 2011-04, Vol.82 (4), p.043502-043502-8 |
| issn | 0034-6748 1089-7623 |
| language | eng |
| recordid | cdi_osti_scitechconnect_22062297 |
| source | AIP Journals Complete; AIP Digital Archive; Alma/SFX Local Collection |
| subjects | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY ACCURACY BACKGROUND NOISE COMPARATIVE EVALUATIONS CURRENT DENSITY FARADAY EFFECT INFRARED RADIATION INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY JET TOKAMAK NUMERICAL ANALYSIS POLARIMETERS SIGNALS TORE SUPRA TOKAMAK VALIDATION |
| title | Evaluation of the Faraday angle by numerical methods and comparison with the Tore Supra and JET polarimeter electronics |
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