Isotope effects on transport in LHD
نویسندگان
چکیده
Abstract Isotope effects are one of the most important issues for predicting future reactor operations. Large helical device (LHD) is presently working largest stellarator/helical using super conducting coils. In LHD, deuterium experiments started in 2017. Extensive studies regarding isotope on transport have been carried out. this paper, results effect LHD reported. The systematic were performed adjusting operational parameters and nondimensional parameters. L mode like normal confinement plasma, where internal edge barriers not formed, scaling global energy time ( ? E ) with shows positive mass dependence M 0.27 ; effective ion mass) electron cyclotron heating plasma no 0.0 neutral beam injection plasma. non-negative anti-gyro-Bohm scaling. role turbulence was also found by measurements gyrokinetic simulation. Better accessibility to barrier (ITB) (D) than hydrogen (H). Gyro kinetic non-linear simulation reduced heat flux due larger generation zonal flow Peaked carbon density profile plays a prominent reducing ITB This evident only ions. New findings mixing non-mixing states D H particle transports state, diffusivities higher profiles almost identical. diffusivity much lower diffusivity. Deuterium clearly different. Different structures suggesting different modes play role.
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ژورنال
عنوان ژورنال: Plasma Physics and Controlled Fusion
سال: 2021
ISSN: ['1361-6587', '0741-3335']
DOI: https://doi.org/10.1088/1361-6587/abffb6