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Optical emission spectroscopy of atmospheric pressure plasma jets in various background gases (CROSBI ID 637361)

Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija

Popović, Dean ; Bišćan, Marijan ; Beuc, Robert ; Milošević, Slobodan Optical emission spectroscopy of atmospheric pressure plasma jets in various background gases // Bioplasmas and Plasmas with Liguids, Book of abstracts / Colombo, Vittorio ; Gherardi, Matteo (ur.). Bolonja: Università di Bologna, 2015. str. 76-76

Podaci o odgovornosti

Popović, Dean ; Bišćan, Marijan ; Beuc, Robert ; Milošević, Slobodan

engleski

Optical emission spectroscopy of atmospheric pressure plasma jets in various background gases

Atmospheric pressure plasma jets (APPJs) are developed for various applications in plasma medicine, biotechnologies and for materials modifications [1]. Various designs of plasma sources and choice of operational parameters are used to tailor plasma content suitable for specific application. We use optical emission spectroscopy in order to characterize APPJs operating under normal atmospheric pressure and under-pressure in different background gases. The APPJ electrode was a copper wire with a diameter of 0.1 mm inserted in a 50 mm long and 1.5 mm outer diameter borosilicate glass capillary tube [2]. Power source was the same as in ref. [3], AC at 25 kHz at about 2.5 kV. This capillary plasma source was inserted into a glass tube of 11.5 cm diameter and 150 cm length. In order to maintain under- pressure conditions, the tube was connected to a rotary vacuum pump and vacuum gauge while the gas (for example helium, purity 99.996%) input flow was controlled with mass flow controller in the range of several L/min. The experimental setup allows various diagnostics to be applied: imaging, spatially resolved optical emission spectroscopy, determination of voltage-current curves and E-M probe measurements, versus total pressure and mass flow in the tube. For optical emission spectroscopy we use miniature fibre spectrometer Avantes Sensline with nominal spectral resolution 0.3 nm. We describe different regimes of the APPJ behaviour depending on the total pressure and mass flow, in terms of the jet lengths, and discuss jet operating mode transitions from atmospheric pressure conditions towards vacuum conditions. This work has been supported by Croatian Science Foundation under project #2753.

Atmospheric pressure plasma jets ; optical emission spectroscopy

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Podaci o prilogu

76-76.

2015.

objavljeno

Podaci o matičnoj publikaciji

Bioplasmas and Plasmas with Liguids, Book of abstracts

Colombo, Vittorio ; Gherardi, Matteo

Bolonja: Università di Bologna

Podaci o skupu

Bioplasmas and Plasmas with Liguids

poster

13.09.2015-16.09.2015

Bertinoro, Italija

Povezanost rada

Fizika