A Study of Charge-Exchange Neutrals from a Rotating Plasma

L. W. Jørgensen, Alfred Hegaard Sillesen

    Research output: Contribution to journalJournal articleResearch


    Measurements of charge-exchange neutrals leaving a rotating plasma (a puffatron device) are reported. Neutrals are observed only during the breakdown phase (2-3 mu s) indicating that the created plasma is fully ionized. Several energy spectra of the neutrals for different plasma parameters are obtained. These spectra are grossly explained using a single-particle orbit model of the plasma ions. Assuming a Maxwellian distribution for the spread in the ion Larmor energy for the central part of the measured energy spectra, it is possible to determine the ion energy during the breakdown phase. Neutral particle measurements at different distances from the puffatron midplane show ionization velocities parallel with the magnetic field of about 2*104 ms-1 and plasma expansion velocities of about 5-6*104 ms-1 corresponding to an electron temperature of about 25 eV.
    Original languageEnglish
    JournalPlasma Physics and Controlled Fusion
    Issue number7
    Pages (from-to)771-784
    Publication statusPublished - 1980


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