camilla.compton@LIGO.ORG - posted 10:20, Friday 13 October 2023 (73437)
Looking at last weeks Ring Heater Tests
Last weeks ring heater tests are listed below. Note that everything was reverted after each ~3 hour test.
Current nominal settings are ITMX 0.44W, ITMY 0W, ETMs both 1.0W.
| Date | Test (W/segment) | Effect | Kappa_C | Circulating Power | Range |
| Fri 29 Sept 73093 | ETMX +0.1W, ETMY -0.1W | Range and squeezing got worse. | Up 0.3% | Down 1kW | Down 3Mpc |
| Wed 4 Oct 73272 | ITM RHs +0.1W, ETM RHs -0.1W | High frequency noise increased. | No Change | Up 1kW | Down 5Mpc |
| Thurs 5 Oct 73289 | ETM RHs +0.1W | 52Hz noise in DARM shows an increase (does fluctuate). High frequency noise slightly decreased. Might try more in this direction. Remade DARM plot, attached. | Down 0.3% | Down 3kW | No Change |
| Fri 6 Oct 73308 | ITM RHs +0.05W | High frequency noise increased. | Down 0.2% | Down 1kW | Down 4Mpc |
Images attached to this report
