2021
DOI: 10.3390/app11198975
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Review of Advanced Implementation of Doppler Backscattering Method in Globus-M

Abstract: Doppler backscattering (DBS) is a microwave diagnostics method typically used to study the plasma rotation velocity. Apart from conventional techniques, more advanced forms of DBS implementation were suggested on Globus-M. More specifically the study of a variety of oscillating processes was performed using DBS. In this review we present a detailed description of all of the methods and techniques employed in Globus-M alongside results obtained using DBS in all the years up until the shutdown of the tokamak. Th… Show more

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Cited by 16 publications
(5 citation statements)
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“…Here, k ⊥ is the wavenumber of turbulent fluctuations perpendicular to the magnetic field, and ρ i is the ion gyroradius. Consequently, it is a widely used diagnostic for both tokamaks and stellarators [8][9][10][11][12][13][14][15][16][17][18][19][20]. Moreover, since DBS is a microwave diagnostic, it is one of the few diagnostics capable of surviving the neutron fluxes generated by burning plasmas of future fusion reactors [21,22].…”
Section: Introductionmentioning
confidence: 99%
“…Here, k ⊥ is the wavenumber of turbulent fluctuations perpendicular to the magnetic field, and ρ i is the ion gyroradius. Consequently, it is a widely used diagnostic for both tokamaks and stellarators [8][9][10][11][12][13][14][15][16][17][18][19][20]. Moreover, since DBS is a microwave diagnostic, it is one of the few diagnostics capable of surviving the neutron fluxes generated by burning plasmas of future fusion reactors [21,22].…”
Section: Introductionmentioning
confidence: 99%
“…This method has been used on a variety of tokamaks and has garnered results regarding the rotation velocity and radial electric field of the plasma [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. On Globus-M, this diagnostic has also been successfully utilized but only for the study of plasma oscillatory processes, not to investigate the transition to H-mode [ 20 ]. Moreover, a multitude of other phenomena was discovered and fruitfully studied, such as geodesic acoustic modes (GAMs), limit-cycle oscillations (LCOs), Alfven eigenmodes (AEs), filaments, and others [ 21 , 22 , 23 , 24 ].…”
Section: Doppler Backscatteringmentioning
confidence: 99%
“…On Globus-M2 the DBS method is used to gather data on the poloidal rotation velocity of the density fluctuations in the tokamak which is used to estimate the radial electric field. Moreover, different oscillatory processes and a multitude of other phenomena were studies using DBS [38]. These include Alfven eigenmodes [39], neoclassical tearing modes [40], quasi-coherent fluctuations (QCFs) [41], limitcycle oscillations [42] and geodesic acoustic modes [43].…”
Section: Dbs On Globus-m2mentioning
confidence: 99%