Suppression of plasma instabilities by the feedback method

Arsenin, V. V.; Chuyanov, V.A.

doi:10.1070/pu1977v020n09abeh005461

Cited by 16 publications

(10 citation statements)

References 4 publications

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“…5,6 Attempts to control the dynamical states ͑and thus indirectly the related transport͒ have been reported since the early 1970s. [7][8][9][10][11] However, promising results have been obtained only in specific configurations so far. In order to improve the efficiency of control schemes it is of importance to gain a better understanding of the underlying instability mechanisms and their spatiotemporal dynamics.…”

Section: Introductionmentioning

confidence: 89%

Drift waves in a high-density cylindrical helicon discharge

et al. 2005

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Section: Introductionmentioning

confidence: 89%

Drift waves in a high-density cylindrical helicon discharge

et al. 2005

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“…Instead, an interpretation was given based on feedback between the electrodes controlled by external circuits. 14,15 Later work by Read 16 on transit time oscillators belongs to the same category. Devices based on Read's proposal have been commercially available for quite some time.…”

Section: Figmentioning

confidence: 99%

Plasma oscillations and terahertz instability in field-effect transistors with Corbino geometry

Sydoruk

Syms

Solymár

2010

Applied Physics Letters

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Propagating between the contacts of a field-effect transistor ͑FET͒, plasma waves in its channel can become unstable and lead to generation of terahertz radiation. While previous studies of this instability concentrated on rectangular FETs, alternative geometries present fresh opportunities. We studied theoretically plasma oscillations in a gated FET with Corbino geometry where, in contrast with the rectangular FET, the oscillations become unstable at symmetric boundary conditions. Moreover, their lowest eigenfrequency is almost twice as high as that in the rectangular FET at comparable instability increments. These advantages make the Corbino FET promising for practical realizations of terahertz oscillators.

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“…The key issue in magnetic confinement of hot plasmas is coping with the various instabilities, which disrupt the shape of the plasma and increase the plasma thermal energy and particles losses. Active feedback stabilization using non-axisymmetric magnetic actuators have been proposed for mirror machine [1][2][3][4] but was never realized. In tokamaks and other toroidal machines, magnetic feedback have been used for many years.…”

Section: Introductionmentioning

confidence: 99%

Microseconds-scale magnetic actuators system for plasma feedback stabilization

2016

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Many magnetic confinement machines use active feedback stabilization with magnetic actuators. We present a novel magnetic actuators system with a response time much faster than previous ones, making it capable of coping with the fast plasma instabilities. The system achieved a response time of 3 µs with maximal current of 500 A in a coil with inductance of 5.2 µH. The system is based on commercial solid-state switches and FPGA state machine, making it easily scalable to higher currents or higher inductivity.

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Suppression of plasma instabilities by the feedback method

Cited by 16 publications

References 4 publications

Drift waves in a high-density cylindrical helicon discharge

Drift waves in a high-density cylindrical helicon discharge

Plasma oscillations and terahertz instability in field-effect transistors with Corbino geometry

Microseconds-scale magnetic actuators system for plasma feedback stabilization

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