Today is the last day of this set of Supernanogan Development. The source ran at 16KV overnight, in anticipation of 16O2+ delivery later today. I expected more bias sparking, but it appears that it sparked off only once. So I will condition at a higher bias later today. Meanwhile, the operators reported touching up the tune with the magnet and the RF. Perhaps we are seeing some temperature effect on the source, so I will be looking at effects of RF on 16O7+ for the next while.
Effects of RF Parameters on 16O7+ Intensity
| RF SP (GHz) |
Amplitude SP (dB) |
Power (W) |
FC6 (nA) |
Comments |
| 15.4726 |
11.10 |
25 |
0.83 |
Starting values optimized |
| 15.4306 |
11.10 |
27 |
1.9 |
RF tolerance feels wider |
| 15.3624 |
10.8 |
19 |
0.85 |
|
| 14.3579 |
10.8 |
40 |
0.85 |
|
| 15.846 |
11 |
22 |
0 .75 |
|
| 15.477 |
10.6 |
32 |
1.75 |
Narrow |
| 15.4290 |
11 |
24 |
2.85 |
Tuner adjustment lost all gains so far |
| 15.4330 |
10.8 |
27 |
2.85 |
Seems resilient enough |
| 15.438 |
11 |
35 |
2.5 |
15.433 - 15.443 range. This is the keeper. |
Below is a stripchart of the beam (in blue; turquise is RF power) for the last three hours, of which the last 150 minutes are at the present settings. Pretty good, I'd say. I double-checked the range on the RF, and it's exactly the same as the start. Excellent. To round things out, here is a last emittance scan of 16O7+ before we move to 16O2+. |