JT-60升级的初步结果

[Proceedings] The 14th IEEE/NPSS Symposium Fusion Engineering Pub Date : 1991-09-30 DOI:10.1109/FUSION.1991.218711

T. Kimura

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引用次数: 0

摘要

报告了JT-60 (JAERI托卡马克-60)升级的初步实验结果，以及JT-60的重建和未来升级计划的概述。JT-60机器的改造在1991年3月底成功完成。在4个月的短运行周期内，实现了4毫安稳定NB(中性束)加热放电，放电持续时间为15秒，平顶持续时间约为1秒。当I/sub P/=4 MA, B/sub t/=4 t, NBI(中性束注入)功率为20 MW时，储能达到5.1 MJ。在I/sub P/=3 MA, B/sub t/=4 t, n/sub e/=2*10/sup 19/ m/sup -3/条件下，氢氧氘放电的总能量约束时间为0.9 s。在I/sub /=4 MA的15-20 mw铌加热氘等离子体中实现了0.25 s的能量约束时间。约束时间与ITER89幂律的l模标度下的约束时间吻合较好。通过注入低靶密度约为0.5*10/sup 19/ m/sup -3/的NB氘，获得了T/sub i/(0) > 20 keV的高离子温度模式放电，其中最大中子产率为1.3*10/sup 16/ n/s，能量约束时间约为国际热核实验堆功率律标度的2.5倍。

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Initial results from the JT-60 upgrade

The initial experimental results in the JT-60 (JAERI Tokamak-60) upgrade are reported along with an overview of reconstruction of JT-60 and future plans for the upgrade. Reconstruction of the JT-60 machine was successfully completed at the end of March 1991. 4-MA stable NB (neutral beam)-heated discharges with a discharge duration of 15 s and a flat-top duration of approximately 1 s have been achieved in a short operational period of 4 months. The stored energy has reached 5.1 MJ with I/sub P/=4 MA, B/sub t/=4 T, and NBI (neutral-beam injection) power of 20 MW. The global energy confinement time of 0.9 s has been achieved in deuterium OH discharges with I/sub P/=3 MA, B/sub t/=4 T, and n/sub e/=2*10/sup 19/ m/sup -3/. The energy confinement time of 0.25 s has been achieved in 15-20-MW NB-heated deuterium plasmas with I/sub p/=4 MA. The confinement time is in good agreement with that in the L-mode scaling of the ITER89 power law. The discharges of high ion temperature mode with T/sub i/(0) over 20 keV have been obtained by injecting deuterium NB with low target density of approximately 0.5*10/sup 19/ m/sup -3/, where the maximum neutron yield is 1.3*10/sup 16/ n/s and the energy confinement time is about 2.5 times as large as that of the International Thermonuclear Experimental Reactor power law scaling.<>

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[Proceedings] The 14th IEEE/NPSS Symposium Fusion Engineering

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