Formation of field-reversed configuration using an in-vessel odd-parity rotating magnetic field antenna in a linear device

Shi, Peiyun; Ren, Baoming; Zheng, Jian; Sun, Xuan

doi:10.1063/1.5047475

Cited by 9 publications

(7 citation statements)

References 27 publications

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“…Previously, it has been reported that FRCs were formed using RMF current drive [26,27]. Note that, in this experiment, the RMF is used to create azimuthal rotating fluid, instead of forming FRC.…”

Section: Experiments Setupmentioning

confidence: 94%

“…Hence, a set of new RMF antennas has been installed in the mid-plane of the central cell along with four independently controlled power sources connected to the antenna to create an RMF. Similar to the method we reported earlier [26], the frequency has been tuned at 88 kHz with maximum currents of 1.6 kA, corresponding to 17.6 Gauss on the axis of the device.…”

Section: Experiments Setupmentioning

confidence: 99%

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Plasma rotation driven by rotating magnetic fields

Ren

Zhang

Yang

et al. 2021

Plasma Phys. Control. Fusion

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We report a novel method to control plasma rotation speed, namely, using the rotating magnetic field (RMF), which is a mature technique to form field reversed configuration, to drive the electron rotation and then the ion rotation via electron–ion collisions in a magnetic mirror plasma. It can be observed that the plasma starts rotating if the RMF strength exceeds a threshold value, corresponding to which the value of the magnetization parameter becomes larger than the value of the penetration parameter. The flow speed achieved in this experiment is approximately 0.14 Mach. The rotation is found to start from outside to inside with the propagating time almost equal to the penetration time of the RMFs. Also, a clear sheared flow is observed to have developed in the region of core plasma. It has been further identified that the electron–ion friction is the dominant force to drive the ion spinning up. The rotation speed is primarily determined by the RMF strength, instead of background magnetic field strength, which may offer a method to study the effect of rotation on the confinement in different magnetic field strengths while keeping the rotation profile intact.

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Section: Experiments Setupmentioning

confidence: 94%

Section: Experiments Setupmentioning

confidence: 99%

Plasma rotation driven by rotating magnetic fields

Ren

Zhang

Yang

et al. 2021

Plasma Phys. Control. Fusion

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“…A novel method for improving the mirror's axial confinement based on the rotating magnetic field (RMF) scheme has been tested on the KMAX [36]. The idea is to use the RMF to form a closed magnetic field structure [37], that is field reversed configuration (FRC), in the plug cell and the continuing operation of RMF can capture the particles, which will stave off the axial loss from the central cell. A preliminary result shows that there is ∼40% improvement in the confinement.…”

Section: Simulations and Experimentsmentioning

confidence: 99%

Summary of the 3rd International Workshop on Gas-Dynamic Trap based Fusion Neutron Source (GDT-FNS)

Chen¹,

Bagryansky²,

Zeng³

et al. 2022

Nucl. Fusion

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The 3rd International Workshop on Gas-Dynamic Trap based Fusion Neutron Source (GDT-FNS) was held through the hybrid mode on 13-14 September 2021 in Hefei, China, jointly organized by the Hefei Institutes of Physical Science (HFIPS), Chinese Academy of Sciences (CAS), and the Budker Institute of Nuclear Physics (BINP), Russian Academy of Sciences (RAS). It followed the 1st GDT-FNS Workshop held in November 2018 in Hefei, China, and the 2nd taking place in November 2019 in Novosibirsk, Russian Federation. With the financial support from CAS and China Association for Science and Technology (CAST), this workshop was attended by more than 80 participants representing 20 institutes and universities from 7 countries, with oral presentations were broadcast via the Zoom conferencing system. 22 presentations were made with topics covering design and key technologies, simulation and experiments, steady-state operation, status of ALIANCE project, multi applications of neutron sources, and other concepts (Tokamaks, Mirrors, FRC, Plasma Focus, etc.). The workshop consensus was made including the establishment of ALIANCE International Working Group. The next GDT-FNS workshop is planned to be held in May 2022 in Novosibirsk.

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“…The experiments were conducted on KMAX-FRC [25]. KMAX θ-pinch FRC is an FRC experiment with θ-pinch coils installed inside the central cell of an axisymmetric tandem mirror device named KMAX [26][27][28]. As depicted in figure 1(a), KMAX has a total length of ∼11 m, which is primarily comprised of one central cell, two side cells, and two end chambers.…”

Section: Keda Mirror With Axisymmetry (Kmax)-frcmentioning

confidence: 99%

The dynamic axial compression of FRC with high-speed translated θ-pinch plasma

Liao¹,

Li²,

Hu³

et al. 2022

Plasma Phys. Control. Fusion

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A novel FRC axial compression experiment with high-speed translated θ-pinch plasma was conducted in the KMAX device. The translated north FRC was decelerated and compressed by an oncoming θ-pinch plasmastream, and the dynamic process was revealed by a 2D magnetic probe array. The FRC separatrix length is compressed to one-third of the initial value while the radius expands by ~57%, resulting in the an ~ 16% increase in the electron temperature and ~26% in the density, which matches the calculation from an adiabatic compression model. The good agreement is explained by the fast compression and particle supplementation owing to the compression with plasma. The results reported in this work may contribute to the understanding of electron heating in collision-merged FRC and provide a new compression method for the magneto-inertial fusion concept.

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Formation of field-reversed configuration using an in-vessel odd-parity rotating magnetic field antenna in a linear device

Cited by 9 publications

References 27 publications

Plasma rotation driven by rotating magnetic fields

Plasma rotation driven by rotating magnetic fields

Summary of the 3rd International Workshop on Gas-Dynamic Trap based Fusion Neutron Source (GDT-FNS)

The dynamic axial compression of FRC with high-speed translated θ-pinch plasma

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