Plasma Sensing Using Terahertz Waves

Spectroscopic characterization of laser produced plasmas and investigation of physical plasma parameters Yalcin, Serife; Gökmen, Ali; Faris, Gregory W.; Department of Chemistry (1995)
THz transmission and detection through glow discharge detectors Cinar, K.; Altan, Hakan; Sahin, A. B. (2013-04-30) The capability of low cost glow discharge detectors (GDDs) to detect terahertz (THz) radiation has drawn much attention recently. In order to employ them in applications such as THz imaging these studies have typically focused on the response of the GDD at specific frequencies. To better understand the spectral behavior of glow discharges, we have not only examined the response of the GDD at a specific frequency of 118 GHz, but also we examined the interaction mechanism of GDDs with THz radiation using tera...
Numerical Improvement of Terahertz Time-Domain Spectroscopic Measurements Koseoglu, D.; Berberoglu, H.; Altan, Hakan (2009-11-06) We have developed an algorithm to efficiently eliminate unwanted reflections typically observed in the data obtained by Terahertz time-domain spectroscopic (THz-TDS) methods. The algorithm works by eliminating the reflections from the boundaries. The numerical improvement of the data allows better analysis of the critical parameters obtained by THz-TDS systems.
Terahertz Time-Domain Study of Silver Nanoparticles Synthesized by Laser Ablation in Organic Liquid Koral, Can; ORTAÇ, Bülend; Altan, Hakan (2016-07-01) We report the investigation of laser-synthesized Ag nanoparticles (Ag-NPs) in an organic liquid environment by using terahertz time-domain spectroscopy (THz-TDS) technique. Colloidal Ag-NPs with an average diameter of 10 nm in two-propanol solution through nanosecond pulsed laser ablation were synthesized. THz-TDS measurements were performed on different volumetric concentration of Ag-NPs suspensions placed in 2-mm path length quartz cuvette. Due to the dispersive and highly absorptive nature of the nano li...
Experimental research on in-tube condensation under steady-state and transient conditions Tanrikut, A; Yesin, O (2005-01-01) In this research study, in-tube condensation in the presence of air was investigated experimentally at a heat exchanger of countercurrent type for different operating conditions. The test matrix for the steady-state condition covers the range of pressures P = 1.8 to 5.5 bars, vapor Reynolds numbers Re, = 45 000 to 94 000, and inlet air mass fraction values Xi = 0 to 52%. The effect of air manifests itself by a reduction in the local heat flux and the local heat transfer coefficient. The local heat transfer ...

Citation Formats

H. Altan, “Plasma Sensing Using Terahertz Waves,” 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48368.