▁will ▁become ▁the ▁largest ▁magnetic ▁conf in ement ▁pl asma ▁physics ▁experiment ▁in ▁use ▁with ▁a ▁pl asma ▁volume ▁of ▁ 8 4 0 ▁cub ic ▁meters , ▁sur pass ing ▁the ▁J oint ▁European ▁Tor us ▁by ▁almost ▁a ▁factor ▁of ▁ 1 0 . ▁ ▁The ▁goal ▁of ▁I TER ▁is ▁to ▁demonstrate ▁the ▁scientific ▁and ▁techn ological ▁feas ibility ▁of ▁fusion ▁energy ▁for ▁peace ful ▁use . ▁It ▁is ▁the ▁largest ▁of ▁more ▁than ▁ 1 0 0 ▁fusion ▁react ors ▁built ▁since ▁the ▁ 1 9 5 0 s . ▁I TER ' s ▁planned ▁successor , ▁DE MO , ▁is ▁expected ▁to ▁be ▁the ▁first ▁fusion ▁re actor ▁to ▁produce ▁electric ity ▁in ▁an ▁experimental ▁environment . ▁ ▁DE MO ' s ▁anticip ated ▁success ▁is ▁expected ▁to ▁lead ▁to ▁full - scale ▁electric ity - produ cing ▁fusion ▁power ▁stations ▁and ▁future ▁commercial ▁react ors . ▁ ▁Background ▁ ▁F usion ▁power ▁has ▁the ▁potential ▁to ▁provide ▁sufficient ▁energy ▁to ▁satisfy ▁mount ing ▁demand , ▁and ▁to ▁do ▁so ▁sust ain ably , ▁with ▁a ▁relatively ▁small ▁impact ▁on ▁the ▁environment . ▁ ▁N uc lear ▁fusion ▁has ▁many ▁potential ▁attra ctions . ▁First ly , ▁its ▁hydro gen ▁is ot ope ▁fu els ▁are ▁relatively ▁abund ant ▁– ▁one ▁of ▁the ▁necessary ▁is ot op es , ▁de uter ium , ▁can ▁be ▁extracted ▁from ▁se aw ater , ▁while ▁the ▁other ▁fuel , ▁tr it ium , ▁would ▁be ▁b red ▁from ▁a ▁l ith