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

Author

Marconi, Mario C. ; Rocca, Jorge J. ; Schmerge, John F. ; Villagram, M. ; Lehmann, Frank J.

Author_Institution

Dept. of Electr. Eng., Colorado State Univ., Fort Collins, CO, USA

Volume

26

Issue

10

fYear

1990

fDate

10/1/1990 12:00:00 AM

Firstpage

1809

Lastpage

1814

Abstract

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

Keywords

discharges (electric); ion lasers; ion recombination; magnetic field effects; plasma collision processes; plasma transport processes; 70 to 100 kG; LiH; XUV laser emission; capillary walls; collisional recombinations; current pulse; discharge magnetic field; electron heat conduction; highly ionized LiH capillary discharge; highly-ionized capillary discharge; hot plasma; ionic transitions; plasma cooling; plasma recombination; rapid conduction cooling; recombination line intensity; strong axial magnetic field; temporal evolution; Cooling; Electrons; Laser excitation; Plasma density; Plasma temperature; Plasma waves; Plasma x-ray sources; Spontaneous emission; Ultraviolet sources; X-ray lasers;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.60905

Filename

60905