As Elenna states in alog 70497, changing TCS settings for the IFO to be stable at 60W should only be a reduction of ETM ring heaters down to 1.0W/segment.
We've not historically had locking issues while changing the ETM ring heaters. I expect the bulk of the heating change should happen in the first ~3-4 hours (65113) and then we'll have a slow transient as the TM cools over the following 24 hours. Suggest a 4am ring heater reduction will leave us in a mostly steady state by 8am .
We will want to watch the violins while this change is happening as ring heater changes do effect the violin damping settings, alog 67176. Tagging SUS.
|
Power In
|
Ring Heater /segment |
CO2X
@25W |
CO2Y
@25W |
Notes
|
|||
|
IX
|
IY
|
EX
|
EY
|
||||
| 75W Current 70078 |
0.44
|
0.0
|
1.2
|
1.2
|
1.7
|
1.7
|
Start of O4 settings
|
| 60W Old Stable 68491 |
0.44
|
0.0
|
1.0
|
1.0
|
1.7
|
1.7
|
Used @60W from 2023/03/3 |
