Diagnostics of MHD instability in the Globus-M spherical tokamak

Патров, М. И.; Bender, S.E.; Gusev, V. K.; Kravtsov, D. E.; Mironov, I. A.; Petrov, Yu. V.; Sushkov, A. V.

doi:10.1134/s1063780x07020018

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Pos(ecpd2015)1751

Mirnov Coils1

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Cited by 3 publications

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“…The coils were tuned to measure themagnetic field fluctuations within a frequency band of up to 100 kHz. This poloidal Mirnov coil array was used to order to determine the poloidal number of the GAM perturbation through a reduced analysis of recorded signals [9]. The frequency of the perturbation was determined from the Fourier spectrum of the probe signal (Fig.…”

Section: Pos(ecpd2015)175mentioning

confidence: 99%

Multi-Diagnostic Approach To Geodezic Acoustic Mode Study

Yashin¹

2016

Proceedings of 1st EPS Conference on Plasma Diagnostics — PoS(ECPD2015)

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Section: Pos(ecpd2015)175mentioning

confidence: 99%

Multi-Diagnostic Approach To Geodezic Acoustic Mode Study

Yashin¹

2016

Proceedings of 1st EPS Conference on Plasma Diagnostics — PoS(ECPD2015)

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“…The coils were tuned to measure the magnetic field fluctuations within a frequency band of up to 100 kHz. This poloidal Mirnov coil array was used in order to determine the poloidal number of the GAM perturbation through a reduced analysis of the recorded signals [14]. The frequency of the perturbation is determined from the Fourier spectrum of the probe signal (figure 2 -B MP ).…”

Section: Mirnov Coilsmentioning

confidence: 99%

Multi-diagnostic approach to geodesic acoustic mode study

et al. 2015

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Multi-diagnostic approach developed for the GAM research in the spherical tokamak Globus M is described. Doppler backscattering (DBS) method as the tool for the GAM study, together with the diagnostics of plasma density and magnetic field GAM oscillations, were simultaneously used in experiments. The version of the DBS diagnostics with two cut-offs positioned at different poloidal angles of the minor cross-section was employed in Globus-M. For the GAM plasma density oscillation study, the D α emission was observed at different angles to restore the spatial mode structure of the GAM plasma density oscillations. At the same time, the array of Mirnov coils was used for the GAM-like magnetic oscillation study, and that made it possible to restore the magnetic field perturbation spatial structure. The coherent and cross-bicoherence analyzes were employed to identify the interaction between the GAM velocity oscillation and plasma turbulent fluctuations.

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