EMISSION CURRENT DEPENDENCE IN THE TIME AND ANGLE NOISE SPECTRA OF GALLIUM LIQUID METAL ION SOURCES D.L. BARR, W.L. BROWN et D.J. THOMSON J. Phys. Colloques, 49 C6 (1988) C6-177-C6-182 DOI: 10.1051/jphyscol:1988630