PIC Results for I=10mA and comparison with Fluid and Experiment
The figure below shows Ez/Ng vs. NgR for I=10mA:
In each case, R=1.0 cm, height = 20 cm, and gas T = 300 K.
- For NR < 1e16 cm-2, there is
good agreement between the PIC, Fluid and experimental results.
- For NR > 1e16 cm-2, the agreement with experiment is not
as good. A possible reason is the neglect of ionizations from metastables.
- For NR < 1e16 cm-2, the PIC Ez from the anisotropic HBS cross-section set is lower than that of the isotropic L&K cross-section set.
- For NR > 1e16 cm-2, the Ez from the two PIC cases converges.
The Tables below shows some PIC (isotropic L&K XS) output:
(ne0 = electron density on axis,
KE0 = average electron energy on axis,
Phi0 = Potential on axis)
PIC (isotropic L&K XS) Results
|
| NR(cm-2) |
I(ma) |
Ez(V/cm) |
Ez/N(Td) |
ne0(cm-3) |
KE0(eV) |
Phi0(V)
|
| 1e14 |
10 |
1.1 |
1100 |
1.1e9 |
15.4 |
36 |
| 3e14 |
10 |
1.16 |
387 |
2.0e9 |
9.7 |
25 |
| 1e15 |
10 |
1.58 |
158 |
3.8e9 |
7.8 |
20 |
| 3e15 |
10 |
2.23 |
74 |
6.5e9 |
6.9 |
18 |
| 1e16 |
10 |
3.76 |
37.6 |
1.1e10 |
6.2 |
17 |
| 2.88e16 |
10 |
8.20 |
28.4 |
1.2e10 |
5.9 |
17 |
| 5.76e16 |
10 |
14.4 |
25 |
1.3e10 |
5.7 |
19 |