H0 temperature and density measurements in a penning surface‐plasma H− ion source. II.

We recently reported the H0 density and temperature in the 4X source (a Penning SPS) as a function of the H2 gas flow and the discharge current, as well as a measurement of the H2 (v=1) vibrational state density. In this paper, we report the H0 density and temperature in the 4X source as a function of magnetic field for the same source geometry of the previous report and as a function of H2 gas flow and discharge current for a smaller discharge chamber. When the smaller discharge chamber is used, the plasma column H0 density increases from 7×1014 cm−3 to 8×1014 cm−3 and the plasma column H0 temperature increases from 1.5 to 1.9 eV.