MEASUREMENT OF H- DENSITY IN A PLASMA BY PHOTODETACHMENT M. Bacal, G.W. Hamilton, A.M. Bruneteau, H.J. Doucet et J. Taillet J. Phys. Colloques, 40 C7 (1979) C7-791-C7-792 DOI: 10.1051/jphyscol:19797381