Faculty of Physics - University of Bucharest

UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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Conference: Bucharest University Faculty of Physics 2013 Meeting

Section: Optics, Spectroscopy, Plasma and Lasers

Title:

Rotation Temperature Determination in Triple Cathode Discharge (Hollow Cathode)

Authors:

M.Bazavan(1), V.Covlea(1), B.Butoi(1,4), B.Bita(1,3,4), A.Avram(3,5), A.Jipa(1), C.Porosnicu(2), M.Lungu(1,2), I.Gruia(1), M.D. Ionita(2)

Affiliation:

1.Faculty of Physics, University of Bucharest, 405 Atomistilor street, 077125, Magurele, Romania

2.National Institute for Lasers, Plasma and Radiation Physics, Magurele, Romania

3.National Institute for R&D in Microtechnologies, 12A Erou Iancu Nicolae street, 023573, Bucharest, Romania

4.Faculty of Physics, University of Bucharest, Plasma Physics Student`s Group

5.Faculty of Electrical Engineering, University "Politehnica" of Bucharest, 313 Splaiul Independentei,060042, Bucharest, Romania

E-mail

bogdan.butoi@psg.unibuc.ro vanea.covlea@yahoo.com

Keywords:

plasma density; external parameters; breakdown voltages

Abstract:

The main interest in plasma devices building is to increase the plasma density. This parameter insures a good efficiency of plasma utilization. The hollow cathode effect (HCE) is a successful enterprise for the plasma technologies [1,2]. We present in this work the triple cathode geometry discharge with HCE and the external parameters of plasma: breakdown voltages, I-V characteristics. Experiments have been performed in air at pressures in the range 0.05-1 Torr and electrode gap 4-10 cm. By optical emission spectroscopy we determined the rotational and vibrational temperature of molecules which is of great interest in many applications. References 1. I.I.Popescu,D.Ciobotaru - Bazele fizicii plasmei,Ed. Tehnica,Bucuresti,1987 2. A.R.Petre,M.Bazavan,V.Covlea,V.V.CovleaI.I.Oprea,H.Andrei, Rom. Reports Phys.,vol.56,no.2,p295-300,2004