Summary of the 2nd International Workshop on Gas-Dynamic Trap based Fusion Neutron Source (GDT-FNS)

Kotelnikov, I. A.; Chen, Zhibin; Bagryansky, P. A.; Sudnikov, A. V.; Zeng, Qiusun; Yakovlev, D. V.; Fang, Wang; Ivanov, A. A.; Wu, Yican

doi:10.1088/1741-4326/ab81ab

Cited by 8 publications

(5 citation statements)

References 19 publications

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“…Initially, this case was highlighted among many others in Ref. [55] in order to compare the stability of anisotropic plasma, which is formed under transverse NBI, with the stability of isotropic plasma. In the A1 model, the R = M variant corresponds to the minimum anisotropy.…”

Section: Combined Mhd Stabilizationmentioning

confidence: 99%

“…This work was initiated in the framework of ALIANCE collaboration [55,[58][59][60][61][62] Special thanks to Alexey Beklemishev for discussing the conditions for the applicability of the LoDestro equation, Victor Ilgisonis for discussing the firehose instability threshold, Alexander Milshtein for discussing the properties of second-order ordinary differential equations with…”

Section: Acknowledgmentsmentioning

confidence: 99%

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Wall stabilization of the rigid ballooning m = 1 mode in a long-thin mirror trap

Kotelnikov¹,

Prikhodko²,

Yakovlev³

et al. 2022

Nucl. Fusion

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The prospect of stabilization of the $m=1$ ``rigid'' ballooning mode in an open axially symmetric long-thin trap with the help of a conducting lateral wall surrounding a column of isotropic plasma is studied. It was found that for effective wall stabilization, the beta parameter $\beta$ must exceed some critical value $\beta_{\text{crit}}$. The dependence of $\beta_{\text{crit}}$ on the mirror ratio, radial pressure profile, axial profile of the vacuum magnetic field, and the width of vacuum gap between plasma and lateral wall was studied. Minimal critical beta at the level of $70\%$ is achieved at zero vacuum gap, although stability zone at $\beta \to 1$ exists even at extremely wide vacuum gap. It is shown that when a conducting lateral wall is combined with conducting end plates simulating attachment of the end MHD stabilizers to the central cell of an open trap, there are two critical beta values and two stability zones that can merge, making stable the entire range of allowable beta values $0<\beta<1$.

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Section: Combined Mhd Stabilizationmentioning

confidence: 99%

Section: Acknowledgmentsmentioning

confidence: 99%

Wall stabilization of the rigid ballooning m = 1 mode in a long-thin mirror trap

Kotelnikov¹,

Prikhodko²,

Yakovlev³

et al. 2022

Nucl. Fusion

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“…This work has been done in the framework of ALIANCE collaboration [22][23][24][25][26][27] The authors are grateful to Dmitri Yakovlev for advice on the form of presenting calculation results and the choice of terms.…”

Section: Acknowledgmentsmentioning

confidence: 99%

Influence of the shape of a conducting chamber on the stability of rigid ballooning modes in a mirror trap

Zeng,

Kotelnikov

2024

Plasma Phys. Control. Fusion

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MHD stabilization of flute and ballooning modes in an axisymmetric mirror trap is studied under the assumption of a strong Finite Larmor Radius effect that suppresses all perturbations with azimuthal numbers m ≥ 2 and makes the m = 1 mode ‘rigid’. The rigid mode can be effectively suppressed using a perfectly conducting lateral wall without any additional means of stabilization or combined with end MHD anchors. Numerical calculations were carried out for an anisotropic plasma produced in the course of neutral beam injection into the minimum of the magnetic field at the right angle to the trap axis. The stabilizing effect of the conducting shell made of a straightened cylinder is compared with a proportional chamber, which, on an enlarged scale, repeats the shape of the plasma column. It is confirmed that for convincing wall stabilization of the rigid modes, the plasma beta (β, the ratio of the plasma pressure to the magnetic field pressure) must exceed some critical value βcr2. When the conducting lateral wall is combined with conducting end plates imitating MHD end anchors, there are two critical betas and, respectively, two stability zones β < βcr1 and β > βcr2 that can merge, making the entire range 0< β <1 of betas allowable for stable plasma confinement. The dependence of the critical betas on the plasma anisotropy, mirror ratio, width of the vacuum gap between the plasma column and the lateral wall, radial pressure profile, and axial magnetic field profile is examined.

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“…The 3rd GDT-FNS workshop covered the most recent theoretical, experimental and engineering activity related to GDT-based neutron sources and their applications. Recent experimental data featured results from GDT, KMAX and GAMMA-10 mirror machines, which included both new and continuing studies that were reported in the 2nd GDT-FNS workshop [7]. The 3rd GDT-FNS workshop presented an update to the ALIANCE project, which included a refined roadmap, neutron simulations and a conceptualized proposal of a new experimental machine.…”

Section: Highlights Of Presentationsmentioning

confidence: 99%

“…The International Workshop on Gas-dynamic Trap-based Fusion Neutron Source (GDT-FNS) was jointly initiated by HFIPS and BINP aiming to further promote the development of the fusion volumetric neutron source in particular the GDT concept, with the first and second workshop held in Hefei (Nov. 2018) and Novosibirsk (Nov. 2019), respectively [7]. Due to the pandemic situation, the third GDT-FNS workshop, planned to be organized in 2020, was held through the hybrid mode on 13-14 September 2021 in Hefei, China, jointly organized by HFIPS and BINP, the same as the previous two workshops.…”

Section: Introductionmentioning

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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Summary of the 2nd International Workshop on Gas-Dynamic Trap based Fusion Neutron Source (GDT-FNS)

Cited by 8 publications

References 19 publications

Wall stabilization of the rigid ballooning m = 1 mode in a long-thin mirror trap

Wall stabilization of the rigid ballooning m = 1 mode in a long-thin mirror trap

Influence of the shape of a conducting chamber on the stability of rigid ballooning modes in a mirror trap

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

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