| 摘 要： | 1.IntroductionAlthoughmosthotplasmasarealmostcompletelyionized,thereare,nevertheless,neutra1atomsthatarecontinuallybeingformedintheplasma.Theseneutralsarisefromtheatomsandmoleculesbeingreleasedfromthewallofvacuumvessel.Recombi-nationofelectronsandionsintheplasmacanalsoformneutrals,buttheyareoflessimportantexceptatveryhighplasmadensitiesandatthecenteroflargeplasma.Someneutralssufferfromthereso-nantchargeexchangewiththeprimaryionandbe-comethefastneutrals.Thehigh-energyatomcanescapefromtheplasma…
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