Gyrokinetic simulations of electrostatic microturbulence in ADITYA-U tokamak

Singh, Tajinder; Sharma, Deepti; Macwan, Tanmay; Sharma, Sarveshwar; Ghosh, Joydeep; Sen, Abhijit; Lin, Zhihong; Kuley, Animesh

doi:10.1088/1741-4326/acc344

Gyrokinetic simulations of electrostatic microturbulence in ADITYA-U tokamak

Journal Article · Fri Mar 24 00:00:00 EDT 2023 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/acc344· OSTI ID:2424682

^[1]; Sharma, Deepti ^[2]; ^[2]; ^[3]; ^[3]; ^[3]; ^[4]; ^[1]

Indian Institute of Science, Bangalore (India)
Institute for Plasma Research, Bhat, Gandhinagar (India)
Institute for Plasma Research, Bhat, Gandhinagar (India); Homi Bhabha National Institute, Anushaktinagar, Mumbai, Maharashtra (India)
University of California, Irvine, CA (United States)

Global gyrokinetic simulations of the electrostatic microturbulence driven by the pressure gradients of thermal ions and electrons are carried out for the ADITYA-U tokamak geometry using its experimental plasma profiles and with collisional effects. The dominant instability is trapped electron mode (TEM) based on the linear eigenmode structure and its propagation in the electron diamagnetic direction. Collisional effects suppress turbulence and transport to a certain extent. Zonal flow is not playing a critical role in the TEM saturation, which is dominated by the inverse cascade. The frequency spectrum of the electrostatic fluctuations is in broad agreement with the experimentally recorded spectrum in the ADITYA-U, with a bandwidth ranging from ~0 to 50 kHz.

View Accepted Manuscript (DOE)

Research Organization:: University of California, Irvine, CA (United States)

Sponsoring Organization:: Board of Research in Nuclear Sciences (BRNS); National Supercomputing Mission (NSM); Science and Engineering Research Board EMEQ program (SERB); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR). Scientific Discovery through Advanced Computing (SciDAC)

OSTI ID:: 2424682

Journal Information:: Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 5 Vol. 63; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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