Simulations on the Mixing Processes of Electrons and Positrons in a Magnetic Mirror Trap

Kaga, C.

doi:10.1585/pfr.12.1401001

Cited by 5 publications

(1 citation statement)

References 23 publications

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“…A wide variety of plasmas, such as high-ion-energy quasineutral plasma, plasmas with high-energy electrons, nonneutral plasmas, electron-positron plasmas, plasma discharges have been studied in a magnetic mirror field [1][2][3][4][5][6][7][8][9][10]. Most of the early studies on the neutrality plasma in magnetic mirrors focused on axi-symmetric magnetic mirrors [1][2][3][4][5], for example, plasma discharges with a high temperature of bulk electrons in the axially symmetric magnetic mirror [3], low energy electron-positron plasmas [4,5] confined in a compact magnetic mirror. Moreover, there are also some works on the non-neutral plasmas, such as non-neutral electron plasmas [6,7], electron beam [8,9] and proton beam [11], studied by experiments and numerical simulation in a magnetic mirror.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the confinement of high energy non-neutral proton beam in a bent magnetic mirror

Wang¹,

Zhang²,

Zhang³

et al. 2022

Plasma Sci. Technol.

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By using the Particle-In-Cell(PIC) simulation method, we study how the proton beam is confined in a bent magnetic mirror. It is found that the loss rate of the charged particles in a bent mirror is less than that in the axi-symmetric mirror. For a special bent mirror with the deflection angle of the coils $\alpha=45^{\circ}$, it is found that the loss rate reaches maximum value at certain ion number density where the ion electrostatic oscillation frequency is equal to the ion cyclotron frequency. In addition, the loss rate is irrelevant to the direction of the proton beam. Our results may be helpful to devise a mirror. In order to obtain the least loss rate, we may choose a appropriate deflection angle, and have to avoid a certain ion number density at which the ion electrostatic oscillation frequency is equal to the ion cyclotron frequency.

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Section: Introductionmentioning

confidence: 99%

Investigation of the confinement of high energy non-neutral proton beam in a bent magnetic mirror

Wang¹,

Zhang²,

Zhang³

et al. 2022

Plasma Sci. Technol.

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Properties of high-energy electron beams trap with a magnetic mirror field

et al. 2019

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The properties of a high energy short pulse electron beam in a magnetic mirror field are studied numerically by the Particle-in-Cell method. The complex nature of processes studied, and also the need for the calculation of the positions, velocities, and trajectories of billions of particles, required the use of a scalable parallel algorithm. The use of modern supercomputers has allowed us to calculate the plasma dynamics, to determine the electron beam in the magnetic mirror field. Mathematical modeling of non-neutral plasma dynamics at the trap is carried out. The axially integrated radial density profiles, electric field distribution, and phase space distribution of velocity are measured. The axial and radial oscillations of a confined non-neutral plasma are also observed.

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Confinement of non-neutral proton plasma within a bent magnetic mirror field: 3D PIC simulation

Zhang,

Sun,

Chen

et al. 2023

AIP Advances

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We conducted a study on the confinement properties of non-neutral proton plasma in an asymmetric magnetic mirror using the three-dimensional (3D) particle-in-cell simulation method. Our findings indicate a close relationship between the ability of the magnetic mirror to confine protons and the incidence orientation of the proton beam. This relationship can only be accurately assessed through 3D simulation, as opposed to two-dimensional simulation. In addition, we observed that a higher velocity parallel to the magnetic field direction results in a shorter confinement time. The electric field at and near the central point of the mirror exhibits quasi-periodic vibrations, attributed to the electrostatic oscillation of the proton and the cyclotron motion. Furthermore, we discovered a drift motion of the confined proton plasma in the direction of the magnetic field gradient. These findings hold implications for the design of magnetic mirrors capable of effectively confining charged particle beams.

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Simulations on the Mixing Processes of Electrons and Positrons in a Magnetic Mirror Trap

Cited by 5 publications

References 23 publications

Investigation of the confinement of high energy non-neutral proton beam in a bent magnetic mirror

Investigation of the confinement of high energy non-neutral proton beam in a bent magnetic mirror

Properties of high-energy electron beams trap with a magnetic mirror field

Confinement of non-neutral proton plasma within a bent magnetic mirror field: 3D PIC simulation

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