Local Radiative Cooling of Edge Plasmas by Intense Neutral Gas Puffing

A. K. Prinja; STEWART J. ZWEBEN

doi:dx.doi.org/10.13182/FST87-A25075

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Home / Publications / Journals / Fusion Science and Technology / Volume 12 / Number 3

Local Radiative Cooling of Edge Plasmas by Intense Neutral Gas Puffing

A. K. Prinja, STEWART J. ZWEBEN

Fusion Science and Technology / Volume 12 / Number 3 / November 1987 / Pages 428-436

Technical Paper / Plasma Engineering / dx.doi.org/10.13182/FST87-A25075

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It is proposed that the overheating of tokamak limiters can be controlled by introducing a strong local source of neutral H₂ directly at that limiter to convert the incident particle energy into isotropic radiation. The neutral influx rate required to substantially reduce the heat flux to the limiter is calculated as a function of the incident plasma parameters using a simplified one-dimensional fluid model Application of this scheme to large tokamaks is discussed.