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22-27 October 2018
Mahatma Mandir Conference Centre
Asia/Kolkata timezone

Overview of the First Deuterium Experiment in LHD

23 Oct 2018, 14:25
Mahatma Mandir Conference Centre

Mahatma Mandir Conference Centre

Gandhinagar (nearest Airport: Ahmedabad), India
Overview OV - Overviews OV/4 Overview Magnetic Fusion


Dr Tomohiro Morisaki (National Institute for Fusion Science)


In the first deuterium (D) experiment, LHD established one of the most important milestones towards the realization of the helical fusion reactor, ion temperature Ti of ~ 10 keV. This is the highest record among stellarator/heliotron devices. Clear reduction of the ion thermal diffusivity in both core and edge regions in D discharge from hydrogen (H) was identified, indicating the effect of the isotope mass. This experimental result was supported by the initial results from gyrokinetic simulations including multi-species of ion. By measuring the neutron flux from D plasma, energetic particle (EP) behavior trapped in the helical ripple could directly be estimated, which is quite important for heliotron devices, because demonstration of the EP confinement is essential to realize the burning condition. Precise measurement of the tritium exhaust demonstrated the tritium mass balance including the evacuation system.
Country or International Organization Japan
Paper Number OV/4-2

Primary author

Dr Tomohiro Morisaki (National Institute for Fusion Science)

Presentation Materials