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4,474 m³/s(大型ポンプ 89 台分)で、端の圧力は 1e-04 Pa まで下がる"},{"driver":"熱の捨て方","value":"放射だけ・周り 4 K","decision":"放射器 323 m²。同じ場所で D-T なら 2,482 m²"},{"driver":"燃料(手に入るもの)","value":"D-³He(重水素+ヘリウム3)","decision":"中性子 1.5 MW → 内側の遮蔽 0.32 m → 中央のコイル半径 1.22 m。端の直接発電器 半径 2.13 m"},{"driver":"遮蔽の材料","value":"なし(運ぶしかない)","decision":"人のいる方向だけを守る影の盾 1.2 m"},{"driver":"重力","value":"なし","decision":"脚が要らない。支柱は電磁力だけを受ける"},{"driver":"近くの人","value":"いない","decision":"柵は要らない(0.5 mT になるのは 28 m)"}],"cad":{"parts":173,"failed":[],"status":1,"unit":"mm"},"layout":{"z_axis":0,"r_reach":2.2297689729449575,"half_len":8.613076033205493,"y_reach":4.405549777191885,"truss":[6.405549777191885,60],"shadow_R":3.1224134334873517,"shadow_t":1.1989700043360187},"changes":[{"what":"真空容器","earth":"28 mm の殻","here":"なし","why":"外がすでに真空(1e-12 Pa)。端を宇宙へ開くと、排気の速さは大型ポンプ 89 台分になる"},{"what":"断熱容器","earth":"41 mm の殻","here":"なし(多層断熱材だけ)","why":"コイルのまわりの断熱は、外の真空がしてくれる"},{"what":"燃料","earth":"D-T(重水素+三重水素)","here":"D-³He(重水素+ヘリウム3)","why":"放射でしか熱を捨てられず、遮蔽の材料も運ぶしかない。中性子の少ない D-³He を選ぶ"},{"what":"遮蔽と増殖層","earth":"遮蔽 0.54 m+増殖層 0.25 m","here":"遮蔽 0.32 m","why":"中性子が 1.5 MW(地上は 24 MW)。三重水素を増やす層が要らない"},{"what":"コイル","earth":"中央の半径 1.75 m・端 8.3 MA","here":"中央の半径 1.22 m・端 6.3 MA","why":"遮蔽が薄いぶん、コイルをプラズマに近づけられる。コイル同士の力は 5.5 → 2.9 MN"},{"what":"端","earth":"閉じた端の部屋・発電器 直径 2.0 m・ポンプ 10 台","here":"開いた端・発電器 直径 4.3 m+放熱フィン 16 枚","why":"端へ出てくる荷電粒子のエネルギーが 28 MW(地上は 6 MW)。発電器の大きさは受けられる熱の流れで決まる。熱は電極から直接宇宙へ捨てる"},{"what":"炉の長さ","earth":"11.9 m","here":"17.2 m","why":"端の発電器とフィンの大きさで決まる"},{"what":"熱の捨て方","earth":"冷却塔 2 区画","here":"放射器 323 m²","why":"熱は放射でしか捨てられない。同じ場所で D-T なら 2,482 m²"},{"what":"外への遮蔽","earth":"コンクリートの建屋 2.4 m","here":"影の盾 1.2 m(人の方向だけ)","why":"地面も砂もない。人のいる方向だけを守る"},{"what":"漏れ磁場の柵","earth":"半径 37 m","here":"なし","why":"近くに人がいない"},{"what":"重さ","earth":"216 kN(電磁力の 1/26)","here":"0(脚なし)","why":"芯の支えを決めるのは電磁力。重力の差は芯の形をほとんど変えない"}],"headline_ja":"芯は月と同じ。地面も砂もないので、人のいる方向だけを 1.2 m の影の盾で守り、60 m のトラスの先に居住区を置く。脚はいらない。放射器 153 m² をトラスに沿って広げ、発電器の熱 170 m² 分はフィンから捨てる。"}