Thermoluminescence study of the trapped charge at an alumina surface electrode in different dielectric barrier discharge regimes

P F Ambrico (1) , M Ambrico (1) , A Colaianni (2, 3) , L Schiavulli (3, 4) , G Dilecce (1) , S de Benedictis (1)

1 Consiglio Nazionale delle Ricerche
2 Dipartimento di Geologia e Geofisica
3 INFN, sezione di Bari - Istituto Nazionale di Fisica Nucleare, sezione di Bari
4 Dipartimento Interateneo di Fisica

52.25.-b {Plasma properties} PACS 52.25.Mq {Dielectric properties} PACS 51.50.+v {Electrical properties} PACS 78.60.Kn {Thermoluminescence} PACS 72.20.Jv {Charge carriers: generation, recombination, lifetime, and trapping} Abstract. In the present study charge trapping effect in alumina dielectric surfaces has been deeply investigated by means of a dedicated dielectric barrier discharge apparatus under different discharge regime and gas mixtures. These work further validates our previous findings in the case of air discharges under filamentary regime. The long lasting charge trapping has been evidenced by ex-situ thermoluminescence characterizations of alumina dielectric barrier plates exposed to plasma. The density of trapped surface charges was found to be higher in the glow discharge with respect to pseudoglow and filamentary regimes and for all regimes a minimum trap activation temperature was of 390 K and trap energy less than or around 1 eV. This implies that in the case of glow discharges a higher reservoir of electrons is present. Also, the effect was found to persist for several days after running the discharge.

Mots clés: Physical Sciences

P F Ambrico, M Ambrico, A Colaianni, L Schiavulli, G Dilecce, et al.. Thermoluminescence study of the trapped charge at an alumina surface electrode in different dielectric barrier discharge regimes. Journal of Physics D: Applied Physics, 2010, 43 (32), pp.325201. ⟨10.1088/0022-3727/43/32/325201⟩. ⟨hal-00569669⟩