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Effect of a strong axial magnetic field in the plasma recombination and extreme ultraviolet emission from a highly-ionized capillary discharge

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5 Author(s)
Marconi, M.C. ; Dept. of Electr. Eng., Colorado State Univ., Fort Collins, CO, USA ; Rocca, J.J. ; Schmerge, John F. ; Villagram, M.
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The effect of an externally applied 70-100-kG axial magnetic field in the temporal evolution of the extreme ultraviolet emission from a 500-μm-diameter highly ionized LiH capillary discharge is studied. In the absence of external magnetic confinement, strong emission from ionic transitions excited by collisional recombinations is observed at the end of the current pulse. The externally applied magnetic field is observed to reduce the intensity of the recombination lines by decreasing the rate of plasma cooling by electron heat conduction to the capillary walls. In contrast, the self-generated magnetic field of the discharge aids to the generation of an initially hot plasma, and allows rapid conduction cooling at the end of the current pulse. The results are discussed in relation to a proposed capillary-discharge-excited extreme ultraviolet recombination laser scheme

Published in:

Quantum Electronics, IEEE Journal of  (Volume:26 ,  Issue: 10 )

Date of Publication:

Oct 1990

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