The helium (He) non-thermal atmospheric pressure plasma jet (APPJ) source was
configured, and the He spectra were measured by applying AC power to the source. A He …

Helium atoms in electronically excited states are produced in atmospheric pressure parallel
plate DBD helium plasma. Pressure broadening coefficients of several helium lines and of O …

Constructive elastic microwave scattering, or, historically, coherent microwave scattering
(CMS), refers to the inference of small plasma object characteristics via in-phase …

Saturated absorption spectroscopy is a powerful technique that provides valuable
information about gas-phase atomic targets, including not only the precise positions of …

In a recent publication [J. Quant. Spectrosc. Radiat. Transfer, 2019 230, 48], Zafar et al. have
reported on the use of Doppler-free spectroscopy of helium 414 nm line for the …

We present a single-shot terahertz time-domain spectroscopy (THz-TDS) diagnostic to probe
the refractive index of plasmas relevant to electric propulsion devices. This diagnostic …

In this work, we develop a chirped terahertz time-domain spectroscopy diagnostic to probe
the non-equilibrium state of chemically reacting plasmas. The diagnostic is capable of …

The Cooperative Research and Development Agreement (CRADA) between Oak Ridge
National Laboratory (ORNL) and TAE Technologies (TAE) focused on a feasibility study of …

Abstract Intermediate pressure plasmas (1− 100 Torr) are an area of growing academic and
industrial interest for a number of different applications. Accurate measurement of plasma …

Helium (He) low temperature plasma with an electron density higher than 10 11 cm− 3 was
produced using an inductively coupled plasma source, and the electron density of this …