Abstract

New flowing afterglow apparatus, Cryo-FALP, was built to study ternary Collisional-Radiative Recombination (CRR) of Ar + ions with electrons in He/Ar afterglow plasma at temperatures 40-200 K. The obtained ternary recombination rate coefficient at 57 K is KCRR =( 3±1)×10 �17 cm 6 s �1 . It is the first time that the KCRR was measured below 77 K. The measured temperature dependence KCRR ∼ T (�4.5±0.4) is in a good agreement with theoretical prediction.

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