Spectroscopic investigations of corona discharge in high pressure helium at 300 KN. Bonifaci, Z. L. Li, A. Denat, V. M. Atrazhev and V. A. ShakhatovEur. Phys. J. Appl. Phys., 55 1 (2011) 13809DOI: https://doi.org/10.1051/epjap/2011100492