Kiyoshi Itami

TL;DR: In this paper, the authors describe the requirements for high reliability in the systems (diagnostics) that provide the measurements in the ITER environment, which is similar to those made on the present-day large tokamaks while the specification of the measurements will be more stringent.

TL;DR: In this article, the power handling by large radiative power loss has been studied in long pulse ELMy H-mode discharges on JT-60U (τd = 30-35 s).

TL;DR: In this paper, the vacuum ultraviolet spectra of highly charged tungsten ions in plasmas at electron temperatures of 8 keV and 14 keV were observed and the emission lines in a wavelength range of 2.6-3.2 nm for the plasma at 8 kV were identified to be the 3p3/2-3d5/2 transitions of W47 +−W54 +.

TL;DR: In a series of experiments in 2000 and 2008, helium wall conditioning discharges by ECRF heating (ECH) were extensively studied in JT-60U with BT = 3.6 T and PECRF = 2.5 MW as discussed by the authors.

TL;DR: In this paper, the spatial resolution and accuracy of the edge Thomson scattering system in ITER (ITER ETS) were discussed and the impact of fast sampling relative to current integration was also investigated.