Overview

• Researchers report the HRNS is nearly complete and designed to measure neutron counts and energies across ITER’s full power range, tolerating fluxes up to hundreds of millions per square centimetre per second.
• The spectrometer will sit behind a thick concrete wall with a small line-of-sight aperture to sample neutrons originating near the plasma center.
• The architecture splits into four spectrometers: TPR with nearly 100 silicon detectors, NDD using diamond detectors, and two time-of-flight systems, FTOF and BTOF.
• Measurements will determine the deuterium–tritium ratio, ion temperature, and combustion quality for control and optimization, with researchers warning that losing this capability would hamper ITER research and future reactor safety.
• The design is a joint effort by IFJ PAN in Kraków, Uppsala University, and Milan’s plasma institute in close cooperation with the ITER Organization.