Effect of residual atmospheric pressure on the development of electrostatic discharges at the surface of protective glasses of solar cells
- Authors: Khasanshin R.H.1, Novikov L.S.2, Korovin S.B.3
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Affiliations:
- Kompozit Joint Stock Company
- Skobeltsyn Institute of Nuclear Physics
- Prokhorov General Physics Institute
- Issue: Vol 10, No 5 (2016)
- Pages: 1001-1010
- Section: Article
- URL: https://journals.rcsi.science/1027-4510/article/view/189786
- DOI: https://doi.org/10.1134/S102745101605030X
- ID: 189786
Cite item
Abstract
Electrostatic discharges obtained upon the irradiation of K-208 glass with 40-keV electrons at a flux density φ of 1010 to 2 × 1011 cm–2 s–1 are studied. The residual pressure pv in the vacuum chamber is varied from 5 × 10–5 to 5 × 10–3 Pa. Structural changes in the sample surfaces are studied by atomic-force microscopy. Depending on the pressure level, two types of discharges are observed in experiments at 3 × 1010 ≤ φ ≤ 1.2 × 1011 cm–2 s–1: a microprojection at the glass–ionized-residual-atmosphere surface and a discharge which develops along the irradiated surface. It is found that at 5 × 10–5 ≤ pv ≤ 3 × 10–4 Pa and 8 × 1010 ≤ φ ≤ 1011 cm–2 s–1, discharges of the first type appear at the beginning of exposure; that is, an increase in microprojections is observed. Further, surface discharges propagate through these microprojections. At 10–3 ≤ pv ≤ 5 × 10–3 Pa and 1010 ≤ φ ≤ 5 × 1010 cm–2 s–1, on the contrary, discharges of the second type are realized at the beginning. These discharges result in the appearance of channels with inhomogeneities on the glass, at which subsequently discharges of the first type occur. It is determined by calculations that in the region adjacent to the exposed glass surface, secondary electrons accelerated in a field of charge accumulated in the glass make the main contribution to the ionization of gases.
About the authors
R. H. Khasanshin
Kompozit Joint Stock Company
Author for correspondence.
Email: rhkhas@mail.ru
Russian Federation, Korolev, Moscow oblast, 141070
L. S. Novikov
Skobeltsyn Institute of Nuclear Physics
Email: rhkhas@mail.ru
Russian Federation, Moscow, 119991
S. B. Korovin
Prokhorov General Physics Institute
Email: rhkhas@mail.ru
Russian Federation, Moscow, 119991