Jump to main content
Jump to site search

Issue 1, 2010
Previous Article Next Article

A three phase rotating field microwave plasma design for a low-flow helium plasma generation

Author affiliations

Abstract

A new 2.45 GHz frequency powered helium plasma source with rotating microwave field generated within the three electrodes has been developed. A stable symmetrical low-flow helium discharge is formed at atmospheric pressure with a minimum field strength at the axis. Thus, a triangle shaped ring plasma is obtained with a channel at the center through which the sample is introduced using a laminar dual-flow injector. The helium plasma operates at a microwave input power of 30–150 W and total gas flow of 200–1500 ml min−1 and it is self-igniting. The preliminary investigation of the plasma fundamental parameters provides a He excitation temperature up to 4000 K, rotational temperature (OH) up to 3100 K and electron number density up to 7.5 × 1014 cm−3. To demonstrate the plasma robustness, both the tolerance for water loading and the excitation and ionisation capability for hydride-forming elements as well as for ionic chlorine are presented. The detection limits for As, Sb and Hg obtained by continuous hydride generation without hydrogen separation were 12, 10 and 9 ng ml−1, respectively.

Graphical abstract: A three phase rotating field microwave plasma design for a low-flow helium plasma generation

Back to tab navigation

Publication details

The article was received on 04 Mar 2009, accepted on 22 Sep 2009 and first published on 14 Oct 2009


Article type: Paper
DOI: 10.1039/B904428K
Citation: J. Anal. At. Spectrom., 2010,25, 44-47
  •   Request permissions

    A three phase rotating field microwave plasma design for a low-flow helium plasma generation

    K. Jankowski, A. P. Ramsza, E. Reszke and M. Strzelec, J. Anal. At. Spectrom., 2010, 25, 44
    DOI: 10.1039/B904428K

Search articles by author

Spotlight

Advertisements