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Latest ITER Newsline

  • Fusion world | Innovative approaches and how ITER can help

    More than 30 private fusion companies from around the world attended ITER's inaugural Private Sector Fusion Workshop in May 2024. Four of them participated in a [...]

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  • Robert Aymar (1936-2024) | A vision turned into reality

    Robert Aymar, who played a key role in the development of fusion research in France and worldwide, and who headed the ITER project for 10 years (1993-2003) befo [...]

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  • The ITER community | United in a common goal

    Gathered on the ITER platform for a group photo (the first one since 2019, in pre-Covid times) the crowd looks impressive. Although several hundred strong, it r [...]

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  • Vacuum vessel | Europe completes first of five sectors

    The ITER assembly teams are gearing up to receive a 440-tonne machine component shipped from Italy—sector #5, the first of five vacuum vessel sectors expected f [...]

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  • SOFT 2024 | Dublin conference highlights progress and outstanding challenges

    Nestled in the residential suburb of Glasnevin, Dublin City University is a fairly young academic institution. When it opened its doors in 1980 it had just 200 [...]

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Of Interest

See archived entries

ITER NEWSLINE -

Taking the electrons' temperature

In ITER, scientists will use over 50 diagnostic systems to accurately "read" the plasma and furnish information that is important to its control, evaluation and optimization. All seven ITER Domestic Agencies are involved in the development and procurement of these systems, some of which will have to be installed and operational at the time of the project's First Plasma in 2025.

Unboxed, installed, tested and ready for experiments: the prototype Fourier Transform Spectrometer at the ITER India lab. (Click to view larger version...)
Unboxed, installed, tested and ready for experiments: the prototype Fourier Transform Spectrometer at the ITER India lab.
As part of its contributions to ITER diagnostics, the Indian Domestic Agency will be supplying several sub-systems of electron cyclotron emission (ECE) diagnostic systems, designed to measure local electron temperature with high spatial and temporal resolution. One of these—a Fourier Transform Spectrometer—will be used in particular to measure the power loss from the ITER plasma due to ECE radiation and to study the non-thermal electrons in the plasma.

R&D and experimental activities are currently underway at a dedicated ITER India laboratory in Gandhinagar (western India). A prototype of the fast-scanning Fourier Transform Spectrometer (FTS), based on requirements specified by ITER India, was manufactured by Blue Sky Spectroscopy Inc., Canada. This prototype has been installed at the ITER India laboratory where post-installation acceptance tests have been carried out and found satisfactory.

Based on a polarizing Michelson interferometer (70-1000 GHz), this fast-scanning Fourier Transform Spectrometer also consists of a cryo-cooled, dual-channel Tera-Hertz radiation measurement detector system. Experiments will be carried out to test attenuation in transmission line components; the results obtained will be instrumental in providing input for the design of an ultra-wideband (70-1000 GHz) transmission line for the ITER ECE diagnostic system.

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