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| themis:history [2024/12/16 16:06] – etienne | themis:history [2024/12/16 16:23] (current) – etienne |
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| High-precision spectropolarimeters were designed to analyze the polarization states of light across different wavelengths, providing detailed information about magnetic fields. In THEMIS design, three first light instruments have been developed: | High-precision spectropolarimeters were designed to analyze the polarization states of light across different wavelengths, providing detailed information about magnetic fields. In THEMIS design, three first light instruments have been developed: |
| * **a spectrograph, MTR**: XXXX | * **a spectrograph, MTR**: XXXX |
| * **a spectro-imager, IPM**: the Italian Panoramic Monochromator ([[https://aas.aanda.org/articles/aas/abs/1998/06/ds6554/ds6554.html| Cavallini, A&A, 1998]]) performed solar bidimensional spectroscopy. On a square field $33''\times 33''$, this instrument allowed to obtain monochromatic images of the solar surface with high spectral resolution (R > 256 000 at 5500 Å), preserving all the spatial resolution delivered by the telescope (~0.2''). | * **a spectro-imager, IPM**: the Italian Panoramic Monochromator ([[https://aas.aanda.org/articles/aas/abs/1998/06/ds6554/ds6554.html| Cavallini, A&A, 1998]]) performed solar bidimensional spectroscopy. On a square field $33''\times 33''$, this instrument allowed to obtain monochromatic images of the solar surface with high spectral resolution (R > 256 000 at 5500 Å), preserving all the spatial resolution delivered by the telescope (~0.2''). IPM consisted of a Fabry-Perot interferometer, used in telecentric mounting, in series with a Universal Birefringent Filter, used as an order sorter. |
| * **an imaging spectrometer, MSDP**: XXXX | * **an imaging spectrometer, MSDP**: XXXX |
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| * France: The Institut National des Sciences de l'Univers (INSU), part of CNRS, took the lead in coordinating the project. | * France: The Institut National des Sciences de l'Univers (INSU), part of CNRS, took the lead in coordinating the project. |
| * Italy: The Instituto Nazionale di Astrofisica (INAF), part of CNR contributed significant expertise in solar physics and instrumentation. | * Italy: The Instituto Nazionale di Astrofisica (INAF), part of CNR contributed significant expertise in solar physics and instrumentation. |
| * Spain: The Spanish National Research Council (CSIC) and other Spanish institutions, in particular the Instituto de Astrofísica de Canarias (IAC) provides the site and logistical support. provided support, particularly in site selection and infrastructure development. | * Spain: Consejo Superior de Investigaciones Científicas(CSIC) and other Spanish institutions, in particular the Instituto de Astrofísica de Canarias (IAC) provides the site and logistical support. provided support, particularly in site selection and infrastructure development. |
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| An agreement was signed between the French CNRS and the Italian CNR. The construction cost of 87.5 million francs was covered with 80% financed by the CNRS and 20% by the CNR. The same funding distribution applies to the operation of the instrument. Observation time is allocated as follows: 60% for the French, 15% for the Italians, 20% for the Spanish, and 5% for "international time." A Franco-Italian steering committee then determined the general policies for the telescope's operation and development. | An agreement was signed between the French CNRS and the Italian CNR. The construction cost of 87.5 million francs was covered with 80% financed by the CNRS and 20% by the CNR. The same funding distribution applies to the operation of the instrument. Observation time is allocated as follows: 60% for the French, 15% for the Italians, 20% for the Spanish, and 5% for "international time." A Franco-Italian steering committee then determined the general policies for the telescope's operation and development. |
