R. Velotta et al., DIRECT MEASUREMENT OF MACROSCOPIC ELECTRIC-FIELDS PRODUCED BY COLLECTIVE EFFECTS IN ELECTRON-IMPACT EXPERIMENTS, Physical review. A, 54(3), 1996, pp. 2482-2485
The macroscopic electric field resulting from the space charge produce
d in electron-impact experiments has been characterized by using secon
dary electrons of well-defined energy (e.g., Auger or autoionizing ele
ctrons) as a probe. It is shown that the measurement of the kinetic-en
ergy shifts suffered by secondary electrons is a suitable tool for the
analysis of the self-generated electric field in a low-density plasma
.