Transfer of a cold atmospheric pressure plasma jet through a long flexible plastic tube

Autor(es)

Kostov, Konstantin G. ^[1] ; Machida, Munemasa ^[2] ; Prysiazhnyi, Vadym ^[1] ; Honda, Roberto Y. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista UNESP, BR-12516410 Guaratingueta, SP - Brazil

^[2] Univ Estadual Campinas UNICAMP, Inst Fis IFGW, BR-13083859 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: PLASMA SOURCES SCIENCE & TECHNOLOGY; v. 24, n. 2 APR 2015.
• Citações Web of Science: 19

Resumo

This work proposes an experimental configuration for the generation of a cold atmospheric pressure plasma jet at the downstream end of a long flexible plastic tube. The device consists of a cylindrical dielectric chamber where an insulated metal rod that serves as high-voltage electrode is inserted. The chamber is connected to a long (up to 4 m) commercial flexible plastic tube, equipped with a thin floating Cu wire. The wire penetrates a few mm inside the discharge chamber, passes freely (with no special support) along the plastic tube and terminates a few millimeters before the tube end. The system is flushed with Ar and the dielectric barrier discharge (DBD) is ignited inside the dielectric chamber by a low frequency ac power supply. The gas flow is guided by the plastic tube while the metal wire, when in contact with the plasma inside the DBD reactor, acquires plasma potential. There is no discharge inside the plastic tube, however an Ar plasma jet can be extracted from the downstream tube end. The jet obtained by this method is cold enough to be put in direct contact with human skin without an electric shock. Therefore, by using this approach an Ar plasma jet can be generated at the tip of a long plastic tube far from the high-voltage discharge region, which provides the safe operation conditions and device flexibility required for medical treatment. (AU)

• Processo FAPESP: 13/06732-3 - Aplicação de jato de plasma frio em pressão atmosférica no tratamento de materiais e esterilização
• Beneficiário: Vadym Prysiazhnyi
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado