Abstract

Several modifications of the direct current plasma jet have resulted in significantly enhanced analysis capabilities. Reducing the electrode angle, decreasing the aerosol chimney size, and operating in a diffuse mode with helium have provided improved stability, sensitivity, freedom from interferences, and detection limits. While the actual mechanism of the helium enhancement is not clear, no direct evidence was found which supports participation in the excitation step. Rather, improved desolvation, vaporization and possibly sample introduction result from the thermal conductivity of helium being much greater than that of argon.

Vacuum Ultraviolet Plasma Arc Radiation Source for the 300–1000-A Wavelength Region

M. E. Levy and R. E. Huffman
Appl. Opt. 9(1) 41-47 (1970)

Improved gas-jet based extreme ultraviolet, soft X-ray laser plasma source

Jonathan Holburg, Matthias Müller, and Klaus Mann
Opt. Express 29(5) 6620-6628 (2021)

Flow characterization of a diamond-depositing dc arcjet by laser-induced fluorescence

Wolfgang Juchmann, Jorge Luque, and Jay B. Jeffries
Appl. Opt. 39(21) 3704-3711 (2000)

Supersonic cooling of rare-gas excimers excited in dc discharges

P. Dubé, T. Efthimiopoulos, M. J. Kiik, and B. P. Stoicheff
Opt. Lett. 16(23) 1887-1889 (1991)

Improved emission uniformity from a liquid-jet laser-plasma extreme-ultraviolet source

Björn A. M. Hansson, Sofia Mosesson, and Hans M. Hertz
Appl. Opt. 43(29) 5452-5457 (2004)