Progress of Preparation for ITER Divertor Thermocouple in JADA

Divertor interferometer diagnostic for ITER

In the harsh environment of the divertor region in ITER, plasmas spanning a huge density range from 1019 to 1022 m−3 are anticipated making measurement of the electron density particularly challenging. For any reasonable wavelength choice, the total phase measured by a conventional two-color interferometer system is always 2 and therefore subject to fringe counting errors. This problem can be r...

Divertor Requirements and Performance in ITER

Status of the Engineering Design of the ITER Divertor

In this paper we present the main features of the ITER Divertor final dlesign from an engineering point of view and describe the present choices regarding layout, geometry and material selection. The assessment of the detailed design shows that the divertor is able to withstand the thermal and electromagnetic loading conditions foreseen for ITER, and that the estimated lifetime of the Plasma Fa...

Materials research under ITER-like divertor conditions at FOM Rijnhuizen

At FOM Rijnhuizen, linear plasma generators are used to investigate plasma-material interactions under high-density (610 m!3), low-temperature (65 eV) plasma bombardment. Research into carbon-based materials has been focused on chemical erosion by hydrogen plasmas. Results from plasma exposure to high-flux (>10 H/m s) and low-temperature hydrogen plasma indicate silicon carbide has a lower rela...

High energy, high current accelerator development for ITER NBI at JADA

At JAEA as the JApan Domestic Agency (JADA) for ITER, a MAMuG (multi-aperture multi-grid) accelerator has been developed for the ITER neutral beam injector (NBI). Beam parameters achieved by the MAMuG accelerator were increased to 0.32 A H at the ion current density of 140 A/m, from the 0.2 A reported at Chengdu, and 796 keV at the beam energy, which was almost the power supply limit (0.5 A) of...