http://swrc.ontoware.org/ontology#Article
Efficiency improvement by application of horizontal magnetic fields for second- and fundamental harmonic EC wall conditioning in JT-60U
en
福本 正勝
仲野 友英
伊丹 潔
諫山 明彦
鈴木 隆博
久保 博孝
By application of a horizontal magnetic field, BH , with 0.3% against a toroidal magnetic field, BT , electron cyclotron wall conditioning (ECWC) plasmas produced by 2nd-harmonic X-mode (X2-mode) EC waves expand radially toward the inner wall, which is to be cleaned for plasma start-up, but BH shrinks the plasma vertically. Excessive BH , BH / BT > 1.1%, produces vertically limited pan-cake shaped plasmas, leading to a reduction of D2 removal efficiency. Efficiency of D2 removal by fundamental harmonic X-mode (X1- mode) ECWC is higher than that by X2-mode one at BH / BT ∼0.3%. The amount of D2 gas removed by the X1-mode ECWC for 1 s is one order of magnitude lower than that by Taylor discharge cleaning (TDC) for 7 min × 2 times after the plasma disruption with similar stored energies (3 MJ). The X1-mode ECWC successfully produces the following tokamak plasma.
Nuclear Materials and Energy
12
725-732
2017-04
2352-1791
10.1016/j.nme.2017.03.036
https://ac.els-cdn.com/S2352179116301375/1-s2.0-S2352179116301375-main.pdf?_tid=8b03b6a2-10af-11e8-9d9d-00000aacb35e&acdnat=1518520865_91a3d6c05fe4ffd4a55b0b99a582602b