Gyromagnetic autoresonance plasma bunches in a magnetic mirror

Andreev, V. V.; Chuprov, D. V.; Ilgisonis, V. I.; Novitsky, A. A.; Umnov, A. M.

doi:10.1063/1.4986009

Cited by 16 publications

(2 citation statements)

References 15 publications

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“…The unit operates in a pulse-periodic mode with a variable duty of GA-cycle. More detailed information about experimental setup and diagnostic methods can be founded from [3], [4].…”

Section: Methodsmentioning

confidence: 99%

The features of the characteristic electromagnetic plasma bunches oscillations in the long magnetic mirror

Novitskiy

Новицкий²,

Chuprov

et al. 2019

Discrete and Continuous Models

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The aim of this work was to study the spectrum of LF and HF oscillations generated by plasma bunches created and confined in the volume of a microwave cavity immersed in the magnetic field of a mirror trap. The registration of electrostatic oscillations in the plasma was carried out using two flat electrodes mounted diametrically opposite in the central part of the cavity close to its wall. This diagnostic showed the presence of low-frequency oscillations with frequencies of 130 kHz and 450 kHz. The oscillation spectrum in the microwave range was recorded at the minimum of the magnetic trap using a real-time spectrometer and a loosely coupled loop antenna. The registration of the spectra in the 40 MHz band revealed a regular change in the frequency of the fundamental oscillation mode of the cavity and the presence of two harmonics of the synchrotron radiation of the plasma bunch at frequencies of 2.25 GHz and 4.52 GHz, respectively. According to the obtained data, the parameters of the formed bunch (density, shape, volume, energy spectra of plasma components) can be restored.

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“…The unit operates in a pulse-periodic mode with a variable duty of GA-cycle. More detailed information about experimental setup and diagnostic methods can be founded from [3], [4].…”

Section: Methodsmentioning

confidence: 99%

The features of the characteristic electromagnetic plasma bunches oscillations in the long magnetic mirror

Novitskiy

Новицкий²,

Chuprov

et al. 2019

Discrete and Continuous Models

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“…Our work on synchronization in HRT systems has been performed as part of an ongoing autoresonance plasma experiments in Plasma physics laboratory of RUDN [11], [12]. To organize the operation of the synchronization system, a single time reference point is selected, and the characteristic stages of each of the processes are separated from this beginning by an adjustable amount of delay.…”

Section: Introductionmentioning

confidence: 99%

Modeling and design of an re-configurable isolated remote for plasma experiments with hard-real-time synchronization

Andreev

Chuprov

2021

Discrete and Continuous Models

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The purpose of this paper is to present the design and implementation of a reconfigurable remote control for performing plasma experiments with Hard-Real-Time (HRT) synchronization under jitter less than 1 microsecond. An additional requirement for a multichannel synchronization system is the use of high-speed optical converters to provide galvanic isolation between powerful modules of the setup and remote control in order to exclude any possibility of disruption of the physical experiment control system. Modeling and development of the software part of the maser remote control panel was performed in the LabVIEW application development environment with Real Time and FPGA modules. The hardware part of the control panel is implemented on a real-time controller working in conjunction with the Xilinx FPGA module. To ensure the optical isolation of synchronization signals, boards of electron-optical converters based on LED lasers with fiber-optic terminals were developed and manufactured. The control program is implemented in a two-module architecture with a HOST application and an FPGA application that exchange data over a 1000BASE-T Ethernet network.

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Autoresonance phenomenon in a long mirror

2021

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The paper describes an implementation of a long mirror-based variant of cyclotron autoresonance which permits a local temporary change in the mirror`s induction and provides a mode for filling the trap with primary plasma, and for the generation of plasma bunches with an energetic electron component and their accumulation within a single cavity. The approach does not require injection of external particles into the acceleration zone as particles can be generated directly within the mirror using specialized conditions of electron cyclotron resonance (ECR) as part of the operational mode. A detailed study of the spectral-angular distribution of Bremsstrahlung in various operational modes has been undertaken. The results of this study permit the optimal value of the time sequence between the leading edge of the pulsed magnetic field and the microwave pulse to be determined, which ensures the optimal mode of electron trapping in the cyclotron autoresonance mode. Bremsstrahlung radiation recorded in the transverse direction has a significantly higher intensity of photons and energy compared to the longitudinal direction during the acceleration and subsequent confinement mode of plasma bunches. The observed changes in the intensity and spectral distribution of the Bremsstrahlung, which depend on the values of the operating parameters for acceleration, afford the possibility to define the dependence of the number of initial plasma particles trapped by cyclotron autoresonance for the different operating modes. The results will improve our understanding of the processes taking place at various stages of the operational modes. In general, such studies are important for gaining an improved understanding of the mechanisms of generation and confinement of hot electron plasma bunches with an energetic electron component for autoresonant interaction in a long mirror.

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Gyromagnetic autoresonance plasma bunches in a magnetic mirror

Cited by 16 publications

References 15 publications

The features of the characteristic electromagnetic plasma bunches oscillations in the long magnetic mirror

The features of the characteristic electromagnetic plasma bunches oscillations in the long magnetic mirror

Modeling and design of an re-configurable isolated remote for plasma experiments with hard-real-time synchronization

Autoresonance phenomenon in a long mirror

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