Reduced ionization coefficients in low-current dc discharge in freons of a new generation

• Published in: The European physical journal. D, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2024-02, Vol.78 (2), Article 14
• Main Authors: Marjanović, Jelena, Marić, Dragana, Petrović, Zoran Lj
• Format: Article
• Language: English
• Subjects: Applications of Nonlinear Dynamics and Chaos Theory; Atomic; Electric fields; Electron and Positron Interactions and Their Applications-a tribute to Professor Michael Brunger; Emission; Freons; Gas density; Ionization coefficients; Low pressure; Molecular; Optical and Plasma Physics; Physical Chemistry; Physics; Physics and Astronomy; Quantum Information Technology; Quantum Physics; Regular Article - Plasma Physics; Spectroscopy/Spectrometry; Spintronics; Tetrafluoroethane; Townsend discharge
• ISSN: 1434-6060; 1434-6079
• DOI: 10.1140/epjd/s10053-024-00808-8

In this paper we present results for reduced ionization coefficients ( α / N, N —gas density) obtained from the breakdown voltage and emission profile measurements in low-pressure dc discharges in two freons: 1,1,1,2-tetrafluoroethane (R134a) with the chemical formula CH2F–CF3 and 2,3,3,3-tetrafluoropropene (HFO1234yf) with the chemical formula CH2=CFCF3. Our results for α / N are determined from the axial emission profiles in low-current Townsend discharge and lay in the intervals of reduced electric fields E / N ( E —electric field, N —gas density), from 2.7 to 5.9 kTd for R134a and from 5 to 23 kTd for HFO1234yf. We also provide a comparison of our experimental results with those from the available literature. Graphical abstract