Dynamical programming based turbulence velocimetry for fast visible imaging of tokamak plasma

Santanu Banerjee, H. Zushi, N. Nishino, K. Mishra, T. Onchi, A. Kuzmin, Y. Nagashima, K. Hanada, K. Nakamura, H. Idei, M. Hasegawa, A. Fujisawa

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

An orthogonal dynamic programming (ODP) based particle image velocimetry (PIV) technique is developed to measure the time resolved flow field of the fluctuating structures at the plasma edge and scrape off layer (SOL) of tokamaks. This non-intrusive technique can provide two dimensional velocity fields at high spatial and temporal resolution from a fast framing image sequence and hence can provide better insights into plasma flow as compared to conventional probe measurements. Applicability of the technique is tested with simulated image pairs. Finally, it is applied to tangential fast visible images of QUEST plasma to estimate the SOL flow in inboard poloidal null-natural divertor configuration. This technique is also applied to investigate the intricate features of the core of the run-away dominated phase following the injection of a large amount of neutrals in the target Ohmic plasma. Development of the ODP-PIV code and its applicability on actual plasma images is reported.

Original languageEnglish
Article number033505
JournalReview of Scientific Instruments
Volume86
Issue number3
DOIs
Publication statusPublished - Mar 1 2015

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programming
Velocity measurement
Turbulence
turbulence
Plasmas
Imaging techniques
dynamic programming
particle image velocimetry
Dynamic programming
Plasma flow
magnetohydrodynamic flow
temporal resolution
Flow fields
flow distribution
velocity distribution
spatial resolution
injection
probes
high resolution
estimates

All Science Journal Classification (ASJC) codes

  • Instrumentation

Cite this

Dynamical programming based turbulence velocimetry for fast visible imaging of tokamak plasma. / Banerjee, Santanu; Zushi, H.; Nishino, N.; Mishra, K.; Onchi, T.; Kuzmin, A.; Nagashima, Y.; Hanada, K.; Nakamura, K.; Idei, H.; Hasegawa, M.; Fujisawa, A.

In: Review of Scientific Instruments, Vol. 86, No. 3, 033505, 01.03.2015.

Research output: Contribution to journalArticle

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