Study of charged particle motion in fields of different configurations for developing the concept of plasma separation of spent nuclear fuel

Smirnov, V. P.; Samokhin, A. A.; Vorona, N. A.; Gavrikov, A. V.

doi:10.1134/s1063780x13050103

Cited by 71 publications

(31 citation statements)

References 9 publications

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“…The plasma beam generated by the plasma source attained an azimuthal velocity while passing through the whirler channel, which only contained the radial magnetic fieldB r . In the focusing device, which contained the radial electric field E r as well as a weak axial magnetic field B z , ions were focused and targeted to different positions according to the charge-to-mass ratio and were collected by the respective collectors [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Spatial charge and compensation method in a whirler

Wang¹,

Jiang²,

Yuming³

et al. 2017

Plasma Sci. Technol.

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Based on particle-in-cell simulation, we studied the motions of ions and electrons. The results have shown that electrons are bounded by a magnetic field and only a small number of electrons can pass through the whirler channel. The plasma becomes non-neutral when it is emitted from the whirler, and the spatial charge leads to a beam divergence, which is unfavorable for mass separation. In order to compensate the spatial charge, a cathode is designed to transmit electrons and the quasi-neutral plasma beam. Experiment results have demonstrated that the auxiliary cathode can obviously improve the compensation degree of the spatial charge.

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Section: Introductionmentioning

confidence: 99%

Spatial charge and compensation method in a whirler

Wang¹,

Jiang²,

Yuming³

et al. 2017

Plasma Sci. Technol.

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“…Plasma separation method, proposed in [1] for spent nuclear fuel and radioactive wastes reprocessing, can to work in practice at about 1 m typical size of plasma volume, 0.1 − 0.2 T magnetic induction and about 1 electrical potential. The presence of buffer plasma with magnetized electrons allows creation conditions for compensation of space charge [2] and reproduction of necessary electric field profile providing efficient spatial separation of ion flows.…”

Section: Introductionmentioning

confidence: 99%

RF plasma generation in the chamber with the conducting walls

et al. 2017

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This work is devoted to study of inductively coupled RF discharge within a metal chamber with a diameter of about 1 m and a length of about 2 m in argon gas (RF frequency is 5.28 MHz). The spatial distributions of electron temperature and density depending on the magnetic induction (from 0 to 0.2 T), plasma-forming gas pressure (0.1 − 10 mTorr) and RF power absorbed in the plasma are presented. For fixed gas pressure (6 mTorr) electron temperature decrease with increasing of magnetic field was found.

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“…However, the lack of values of ion energies prevents further development of this technology. Calculations [4,5] show that separation of heavy and light ion groups becomes possible with ion energy about one electron-Volt.…”

Section: Introductionmentioning

confidence: 99%

Plasma jet characteristics in vacuum arc with diffused cathode spot

Амиров¹,

Vorona²,

Gavrikov³

et al. 2017

J. Phys.: Conf. Ser.

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Abstract. Diffused vacuum arc, which is characterized by the absence of microparticles in cathode erosion products and by the irregular voltage oscillations, is considered to be a perspective plasma source for plasma reprocessing technology of spent nuclear fuel (SNF). The development of this technology requires data on ions energy in plasma jet. In this work parameters of plasma jet in diffused vacuum arc with a gadolinium cathode were studied by a retarding field analyzer, Langmuir and condensation probes. Gadolinium is regarded as a substance simulating SNF plasma. Ion energy spectrum was studied at arc currents of 30-75 A and voltages of 4-15 V at the distance of 20 cm above the arc anode. Dependencies of spectrum widths and most possible ion energies on arc voltages were obtained. The measured electron temperature was 2 eV, the maximum ion energy reached 70 eV. Experimental data were used to calculate adiabatic plasma expansion through the anode outlet.

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Study of charged particle motion in fields of different configurations for developing the concept of plasma separation of spent nuclear fuel

Cited by 71 publications

References 9 publications

Spatial charge and compensation method in a whirler

Spatial charge and compensation method in a whirler

RF plasma generation in the chamber with the conducting walls

Plasma jet characteristics in vacuum arc with diffused cathode spot

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