35W FE Pump Diode Operating Current Increase (WP 8154)
This morning I increased the operating currents of the pump diodes for the 35W FE; since this is the 1st adjustment in many months, I also tweaked the pump diode operating temperatures. All adjustments were performed with the ISS OFF. The changes are outlined in the table below:
| Operating Currents (A) | Operating Temperatures (°C) | |||
| Old | New | Old | New | |
| D1 | 47.0 | 47.4 | 26.5 | 26.5 |
| D2 | 47.0 | 47.4 | 22.3 | 22.3 |
| D3 | 44.0 | 44.4 | 26.8 | 26.8 |
| D4 | 44.0 | 44.4 | 26.7 | 26.8 |
The FE is now outputting 32.3W and the ISS is back ON; a screenshot of the PSL Beckhoff FE screen is attached for future reference. This completes LHO WP 8154.
Edit: Forgot to mention that when turning the ISS back ON, I had to adjust the reference signal to account for the increased power out of the PSL. The old value was -2.06V, the new value is -2.08V, and the diffraction percentage is ~2.2%. This change was accepted in SDF.
Weekly Power Watchdog Reset (FAMIS 10705)
The PSL power watchdogs were reset at 16:30 UTC (9:30 PDT). This completes FAMIS 10705.
One Other Item
While doing the above, I noticed that the FSS RefCav TPD had fallen from Ed and I's adjustment from last week; it had fallen from ~4.2V to ~2.9V. Seeing this, I gave the beam alignment a quick tweak. The RefCav TPD is now reading ~3.7V. We will continue to monitor this.
