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Latest ITER Newsline

  • Disruption mitigation | Final design review is a major step forward

    The generations of physicists, engineers, technicians and other specialists who have worked in nuclear fusion share a common goal, dedication and responsibility [...]

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  • Image of the week | Like grasping a bowl of cereal

    Contrary to the vast majority of ITER machine components, the modules that form the central solenoid cannot be lifted by way of hooks and attachments. The 110-t [...]

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  • Education | 13th ITER International School announced

    The 13th ITER International School (IIS) will be held from 9 to 13 December in Nagoya hosted by National Institute for Fusion Science (NIFS), Japan. The subject [...]

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  • Open Doors Day | Having fun while discovering ITER

    A public event on Saturday 13 April draws a big crowd. It was a beautiful, summer-like day on Saturday 13 April. Perfect for a journey into ITER. Nearly 800 mem [...]

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  • Fusion world | Increased awareness in a changing landscape

    The world of fusion research is changing fast, and world leaders are taking notice. The large public projects that occupied centre stage for the past decades ar [...]

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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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