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Lithium-argon discharges in a multicusp-ECR microwave resonant cavity

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2 Author(s)
C. B. Brooks ; Dept. of Nucl. Eng., Michigan Univ., Ann Arbor, MI, USA ; M. L. Brake

Argon and lithium-argon discharges have been created in a multicusp-ECR microwave resonant cavity. A double Langmuir probe has been used to determine discharge characteristics, indicating ion densities of 1010-1011 cm-3 and electron temperatures of about 3 eV with operating pressures of 4-20 mtorr and input powers of 100-250 W. Lithium is introduced to the system in the form of lithium chloride or lithium carbonate which is then heated by a background argon discharge allowing dissociation of lithium. The dissociation is evidenced by the observation of strong Li-I lines in the discharge using optical emission spectroscopy. LiCl was found to give a strong Li-I optical signal for about 15 min run time whereas Li 2CO3 gave lower intensity lines, but for about 60 min run time

Published in:

IEEE Transactions on Plasma Science  (Volume:23 ,  Issue: 6 )