Power absorption, plasma parameters and wave structure in inductive RF plasma source with low value external magnetic field

A plasma gun for forming a plasma stream in the open magnetic mirror trap with additional helicoidal field SMOLA is described. The plasma gun is an axisymmetric system with a planar circular hot cathode based on lanthanum hexaboride and a hollow copper anode. The two planar coils are located around the plasma source and create a magnetic field of up to 200 mT. The magnetic field forms the magnetron configuration of the discharge and provides a radial electric insulation. The source typically operates with a discharge current of up to 350 A in hydrogen. Plasma parameters in the SMOLA device are Ti ~ 5 eV, Te ~ 5–40 eV and ni ~ (0.1–1) × 1019 m−3. Helium plasma can also be created. The plasma properties depend on the whole group of initial technical parameters: the cathode temperature, the feeding gas flow, the anode-cathode supply voltage and the magnitude of the cathode magnetic insulation.

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Effect of an External Magnetic Field on the Absorption Efficiency of the RF Power in a Spatially Bounded Inductive Plasma Source

Plasma Physics Reports ◽

10.1134/s1063780x18090088 ◽

2018 ◽

Vol 44 (9) ◽

pp. 878-881

Author(s):

P. A. Nekliudova ◽

E. A. Kralkina ◽

K. V. Vavilin ◽

I. I. Zadiriyev ◽

A. M. Nikonov

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Plasma Source ◽

Absorption Efficiency ◽

Rf Power

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Structure of RF fields in a twin-chamber radio-frequency inductive plasma source placed in a weak external magnetic field

Vacuum ◽

10.1016/j.vacuum.2020.109634 ◽

2020 ◽

Vol 181 ◽

pp. 109634

Author(s):

A.K. Petrov ◽

E.A. Kralkina ◽

A.M. Nikonov ◽

K.V. Vavilin ◽

I.I. Zadiriev

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Radio Frequency ◽

Plasma Source

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Ordinary electromagnetic mode instability

Journal of Plasma Physics ◽

10.1017/s002237780002609x ◽

1975 ◽

Vol 13 (2) ◽

pp. 335-348 ◽

Cited By ~ 6

Author(s):

Chio-Zong Cheng

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Velocity Distribution ◽

Growth Rates ◽

Cyclotron Frequency ◽

Single Species ◽

Dispersion Characteristics ◽

Mode Instability ◽

Plasma Parameters ◽

Electromagnetic Mode

The instability of the ordinary electromagnetic mode, propagating perpendicular to an external magnetic field, is studied for a single-species plasma with ring velocity distribution. The marginal instability boundaries for both the purely growing mode and the propagating growing modes are calculated from the instability criteria. The dispersion characteristics for various sets of plasma parameters are also given. The frequency bands of the propagating growing modes are centered at about (η +½)ωc, where η = 1, 2,…, and the typical growth rates are of the order of the cyclotron frequency and enhanced by increasing fluβ1.

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HIGH-CURRENT RELATIVISTIC ELECTRON BEAM FOCUSING IN PLASMA

10.46813/2021-134-030 ◽

2021 ◽

pp. 30-34

Author(s):

О.V. Manuilenko ◽

A.V. Pashchenko ◽

V.G. Svichensky ◽

B.V. Zajtsev

Keyword(s):

Magnetic Field ◽

Electron Beam ◽

External Magnetic Field ◽

Relativistic Electron ◽

Relativistic Electron Beam ◽

Beam Current ◽

High Current ◽

Plasma Parameters ◽

Beam Focusing ◽

Envelope Equation

The analysis of the envelope equation for high-current relativistic electron beam propagation in plasma in an external uniform magnetic field is presented. The envelope equation is obtained in a Hamiltonian form with an effective potential, which depends from electron beam and plasma parameters, and external magnetic field. Hamiltonian aproach allows fully analyze the behavior of the beam envelope as a function of the beam current, beam energy, plasma density and conductivity, as well as on the external magnetic field and the initial beam angular momentum.

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Plasma Parameters in the Reactor with Simultaneous Magnetron Discharge and Inductive Radio-Frequency Discharge in the Presence of External Magnetic Field

Journal of Communications Technology and Electronics ◽

10.1134/s1064226918040010 ◽

2018 ◽

Vol 63 (4) ◽

pp. 374-380 ◽

Cited By ~ 1

Author(s):

A. F. Aleksandrov ◽

K. V. Vavilin ◽

E. A. Kral’kina ◽

P. A. Neklyudova ◽

A. M. Nikonov ◽

...

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Radio Frequency ◽

Plasma Parameters ◽

Magnetron Discharge ◽

Radio Frequency Discharge

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Physical processes in a low-power inductive plasma source in the presence of a weak magnetic field

Applied Physics ◽

10.51368/1996-0948-2021-5-38-43 ◽

2021 ◽

pp. 38-43

Author(s):

Phedor Ivandikov ◽

Ilya Zadiriev ◽

Elena Kralkina

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Magnetic Fields ◽

Low Power ◽

Weak Magnetic Field ◽

Discharge Plasma ◽

Plasma Source ◽

Axial Component ◽

Physical Processes ◽

Power Coupling

Research into the influence of a weak external magnetic field (<150 G) on the efficiency of power coupling to plasma and on the structure of axial RF fields in plasma is presented. Power coupling to the discharge plasma as well as the structure of the axial component of RF magnetic fields are shown to depend on the external magnetic field’s magnitude in a nonmonotous manner.

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Equilibrium configurations of Vlasov plasmas carrying a current component along an external magnetic field

Journal of Plasma Physics ◽

10.1017/s0022377800006772 ◽

1972 ◽

Vol 7 (3) ◽

pp. 445-459 ◽

Cited By ~ 14

Author(s):

J. R. Kan

Keyword(s):

Magnetic Field ◽

Free Energy ◽

External Magnetic Field ◽

Constant Field ◽

Current Component ◽

Equilibrium Solutions ◽

Plasma Parameters ◽

Equilibrium Configurations ◽

Field Aligned Current ◽

A Current

A class of equilibrium configurations of Vlasov plasmas carrying a current component along an external magnetic field is presented. The present slab model contains the diamagnetic current jy, and the field-aligned current jz for arbitrary βc (= particle pressure/magnetic pressure of the applied constant field). For fixed βc and field-aligned current, our model admits a family of equilibrium solutions in which the diamagnetic currents range from zero to a maximum value. The amount of diamagnetic current flowing in a machine depends on the width of the machine, the field-aligned current and other plasma parameters. The Helmholtz free energy of the system is calculated under the constraints that the total number of particles and the field-aligned current are conserved. The least unstable equilibrium configuration in a machine is obtained by minimizing the free energy under the stated constraints among all equilibria whose plasma widths do not exceed the width of the machine.

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