Nuclear Fushion | |
The constraint of plasma power balance on runaway avoidance | |
article | |
Christopher J. McDevitt1  Xian-Zhu Tang2  Christopher J. Fontes2  Prashant Sharma2  Hyun-Kyung Chung3  | |
[1] Nuclear Engineering Program, University of Florida;Los Alamos National Laboratory;Korea Institute of Fusion Energy | |
关键词: runaway electrons; disruption mitigation; tokamak; disruptions; | |
DOI : 10.1088/1741-4326/acae38 | |
来源: Institute of Physics Publishing Ltd. | |
【 摘 要 】
In a post-thermal-quench plasma, mitigated or unmitigated, the plasma power balance is mostly between collisional or Ohmic heating and plasma radiative cooling. In a plasma of atomic mixture {n_alpha}withαlabeling the atomic species, the power balance sets the plasma temperature, ion charge state distribution {n_alpha^i}withithe charge number, and through the electron temperature T_mathrm{e}and ion charge state distribution {n_alpha^i},the parallel electric field E_parallel.Since the threshold electric field for runaway avalanche growth E_mathrm{av}is also set by the atomic mixture, ion charge state distribution and its derived quantity, the electron density n_mathrm{e},the plasma power balance between Ohmic heating and radiative cooling imposes a stringent constraint on the plasma regime for avoiding and minimizing runaways when a fusion-grade tokamak plasma is rapidly terminated.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO202307170000540ZK.pdf | 2071KB | download |