Plasma rotation driven by rotating magnetic fields

Ren, Baoming; Zhang, Jiadong; Yang, Zhida; Zhu, Guangyan; Zhou, Haiyang; Zheng, Jian; Sun, Xuan

doi:10.1088/1361-6587/abdcdd

Cited by 6 publications

(9 citation statements)

References 33 publications

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“…A better result could be achieved if the initiate plasma in KMAX can be better, for instance, better ionization or less neutrals. In a separate experiment, the RMF was relocated to the central cell, and it was found that the RMF can rotate the plasma and create a shear flow [38]. The triple probe measurements reveals that the plasma density profile becomes more peaked, indicating a change in the radial transport.…”

Section: Simulations and Experimentsmentioning

confidence: 96%

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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Section: Simulations and Experimentsmentioning

confidence: 96%

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 KMAX θ-pinch FRC is an FRC experiment with θ-pinch coils installed inside the central cell of a tandem mirror device named KMAX (Keda Mirror with AXisymmetry) [12,13]. As depicted in figure 1(a), KMAX is at present a 10.4 m long axisymmetric tandem mirror device primarily comprising one central cell and two end cells, which are 5.2 m and 2.2 m in length, respectively [14]. The diameters of the central vessel and the mirror throat are 1.2 m and 0.3 m, respectively.…”

Section: Kmax θ-Pinch Frcmentioning

confidence: 99%

Experimental study of single-translated field-reversed configuration in KMAX

Liao¹,

Hu²,

Li³

et al. 2022

Plasma Sci. Technol.

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For the collisional merging field reversed configurations (FRCs), it is desired to have both FRCs to be tuned approximately same, as well as to optimize each FRC to have high temperature, and high translation speed so as to retain most of the equilibrium flux after traveling a distance to the middle plane for merging. The present study reports the experimental study of a single-translated FRC (field-reversed configuration) in the KMAX-FRC device with various diagnostics, including a triple probe, a bolometer, several magnetic probe arrays, and a novel 2D internal magnetic probe array. According to the measurements conducted in the present study, a maximum toroidal magnetic field equal to ~1/3 of the external magnetic field inside the FRC separatrix radius is observed, and the typical parameters of a single-translated FRC near the device’s mid-plane are n e ~ 2-4×1019 m-3, T e ~ 8 eV, T i ~ 5 eV , R s ~ 0.2 m , l s ~ 0.6 m, and Φ p(RR) ~ 0.2 mWb . The 2D magnetic topology measurement revealed, for the first time, the time evolution of the overall internal magnetic fields of a single-translated FRC, and an optimized operation regime is given in the paper.

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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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Plasma rotation driven by rotating magnetic fields

Cited by 6 publications

References 33 publications

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

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

Experimental study of single-translated field-reversed configuration in KMAX

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

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