2024/06/24
I turned off 3 TMPs at both sides of PR2 (#2, #11) and PR2 side of PR3 (#10).
I turned on the ion pump at the PR3 side of PR2 (#2).
These figures are shown data of PR2 and PR3 OpLevs from 6/24 9 JST to 17 JST.
I do not know the exact time of the work, so I compare the morning and evening glitch distributions.
PR2 pit and yaw glitches around 2 Hz are decreasing due to this work.
PR3 pit and yaw glitches around 10 Hz are also decreasing but still remaining at lower frequency.
There was no change for OpLev SUM.
Washimi, Uchiyama
We turned off 5 TMPs and started the operation of 3 ion pumps in the center area.
The stopped TMPs are between SRm and SR3 (#14), SR2 and SR3 (#4), BS and SR2 (#12), GVbsx and BS (#3), and GVbsy and BS (#13).
The operated ion pumps are #14, #3, and #13.
I gave up the operation of ion pump #4 because the vacuum pressure shown in the ion pump controller did not decrease around 2*10^-4Pa.
Because the temps in the corner station is decreasing, I changed the target temp of the precision cooler for the PSL room from 23.00 to 23.01 around 18:30 to try to keep the max imc output power.
vacuum level change
Yasui, Ueda, Kimura, Uchiyama
We stopped 2 TMPs and started the operation of 3 ion pumps.
2 TMPs are between MCF and MCE (#1) and IFI and IMMT (#9).
3 ion pumps are #1, #9 and between SR2 and SR3 (#4).
Uchiyama
When I stopped TMP at IMC, I forgot to stop the dry pump.
I stopped the dry pump today.