Publications by authors named "Ryoma Yanai"
Article Synopsis
- The Large Helical Device experiments revealed that heat pulses travel quickly and non-diffusively, with speed increasing as the pulse duration decreases.
- There is a simultaneous movement of temperature gradients and turbulence, occurring over milliseconds, which fits the avalanche model's predictions.
- These findings suggest that tighter, localized pulses lead to more instability in plasma, highlighting important considerations for maintaining steady-state conditions in future fusion reactors.
A collective Thomson scattering (CTS) diagnostic with a ±3 GHz band around a 77 GHz gyrotron probe beam was developed to measure the velocity distribution of bulk and fast ions in high-temperature plasmas. We propose a new in situ calibration method for a CTS diagnostic system combined with a raytracing code. The method is applied in two situations for electron cyclotron emission in plasmas and in a CTS diagnostic with a modulated probe beam.
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