Spatial non-uniformity in extracted negative ions and incidence of negative ions to the acceleration grids.
Schematic drawing of the JAEA 10 ampere (10 A) negative ion source.
Schematic diagram of spectroscopic measurement in the 10 A source and positions of EEDF calculation in the driver region (Z = 80–100 mm).
Cross-sections of the reactions #1-5 in Table I .
Contour map of the H0 production rate in XY plane of the 10 A source.
Spatial profiles of the calculated H0 production rate from the total EEDF in Fig. 4 (blue circles), the calculated H0 production rate with only the thermal electron component (ε < 25 eV) of the EEDF (green squares), and measured Hα line intensity (red triangles).
Contour map for the reaction rates of (a) the reaction #1 and (b) the reaction #5.
Main reactions taken into account in the analysis.
Rate coefficients of dissociative ionization for each vibrational level.
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