I adjusted the height of GAS filters in Type-A towers under the cooling. The setpoints of F1 GAS were changed so that the MN Vertical Oplevs can be zero. The F1 GASs in IX, IY, and EY were offloaded with the FRs to avoid saturation. The F0 and F2 in IX were offloaded too.

I adjusted the height of GAS filters in Type-A towers under the cooling. The setpoints of F1 GAS were changed so that the MN Vertical Oplevs can be zero. The F1 GASs in IX, IY, and EY were offloaded with the FRs to avoid saturation.

I adjusted the height of GAS filters in Type-A towers under the cooling. The setpoints of F1/F2 GAS were changed so that the MN Vertical Oplevs can be zero. The F1/F2 GASs in IX, IY, and EY were offloaded with the FRs to avoid saturation.

EY MNV oplev was touched already as reported in 26232. After touching it, is it ok to use it for the height reference?

I changed ETMX BF GAS setpoint to adjust the ETMX height with respect to the MNV OpLev.
Setpoint was changed from 1630 to 1520 (fig1: before change, fig2: after change).

I adjusted the height of GAS filters in Type-A towers under the cooling. The setpoints of F1/F2 GAS were changed so that the MN Vertical Oplevs can be zero. The F1/F2 GASs in IY and EY were offloaded with the FRs to avoid saturation.

I summarized the adjustment of the height of GAS filters in Type-A towers under cooling. The plots show the sum of changed setpoints.

I adjusted the height of ETMX. The setpoint of F1 GAS was changed from 910 to 1170 so that the MN Vertical Oplev can be zero.

I adjusted the height of ETMX. The setpoint of F1 GAS was changed from 1170 to 2100 so that the MN Vertical Oplevs can be zero. The F1/BF GASs were offloaded with the FRs.

I adjusted the height of ETMX. The setpoint of F1 GAS was changed from 2100 to 2470 so that the MN Vertical Oplevs can be zero.

Ushiba-san adjusted the height of ETMX (klog). The setpoint of F1 GAS was changed from 2470 to 2600.

I adjusted the height of ETMX. The setpoint of F1 GAS was changed from 2600 to 2800 so that the MN Vertical Oplevs can be zero.

I adjusted the height of GAS filters in Type-A towers. The setpoints of F1/F2 GAS were changed so that the MN Vertical Oplevs can be zero for IX and -0.5 for EX.

I adjusted the height of ETMX. The setpoint of F1 GAS was changed from 2400 to 1900 so that the MN Vertical Oplev can be -0.5. The F1 GAS was offloaded with the FR to avoid saturation.

I didn't see the plan for the ETMX height adjustment on Teamup. When did you work on it?

Now, the shutter was closed to care for the laser hazard of the OMC work. I can't take the TCam image to measure the height change before and after the height adjustment.

Sorry for my miscommunication. The drift speed of the ETMX was large and the MN V Oplev was closing out of range, so I adjusted the height around 10 am today.

I will make small corrections again tomorrow morning before the Tcam session.

I see the situation.

I talked with Yokozawa-san. We will give up taking TCam images for ETMX before your adjustment work tomorrow early morning. After the height adjustment work, Yokozawa-san will take TCam images. In the current plan, it will start at 7 AM. If there is any trouble, please let Yokozawa-san know.

I adjusted the height of ETMX. The setpoint of F1 GAS was changed from 1900 to 1820 so that the MN Vertical Oplev can be -0.5.

I adjusted the height of ETMX. The setpoint of F1 GAS was changed from 1820 to 1400 so that the MN Vertical Oplev can be -0.5. The F1 GAS was offloaded with the FR to avoid saturation.

I adjusted the height of ETMY. The setpoints of F1/F2/F3 GASs were changed so that the MN Vertical Oplevs can be zero. The FR could not work.

I corrected the setpoints of F2 and BF to avoid the saturation of F2.

Sorry for my miss heater settings. I reduced the heater power at EYC1F.

I adjusted the height of ETMY. The setpoints of F2/F3 GASs were changed so that the MN Vertical Oplevs can be zero.

By the way, the FRs (stepper motors) for GAS and IP in EY are not working now maybe due to BIO/RelaySW trouble.

I adjusted the height of ETMY. The setpoints of F2/F3 GASs were changed so that the MN Vertical Oplevs can be zero.

I adjusted the height of ETMX. The setpoint of F3 GAS was changed from -3478 to -3700 so that the MN Vertical Oplev can be zero.

I adjusted the height of ETMY. The setpoints of F1/F2 GASs were changed so that the MN Vertical Oplevs can be zero. The F1/F2/F3 GASs were offloaded with the FR to avoid saturation.

I adjusted the height of ETMY. The setpoints of F1/F2 GASs were changed so that the MN Vertical Oplevs can be zero. The F1 GAS was offloaded with the FR to avoid saturation.

I adjusted the height of ETMY. The setpoint of F1 GAS was changed from -2130 to -2480 so that the MN Vertical Oplevs can be zero. The F1 GAS was offloaded with the FR to avoid saturation.

I adjusted the height of ETMY. The setpoint of F1 GAS was changed from -2480 to -2870 so that the MN Vertical Oplevs can be zero. The F1 GAS was offloaded with the FR to avoid saturation.

I adjusted the height of ETMY. The setpoint of F1 GAS was changed from -2870 to -3350 so that the MN Vertical Oplevs can be zero. The F1 GAS was offloaded with the FR to avoid saturation.

I adjusted the height of ETMY. The setpoint of F3 GAS was changed from 1943 to 1713 so that the MN Vertical Oplevs can be zero.

I summarized the height adjustment of ETMY under cooling from Dec. 13th. The plot shows the sum of the changed setpoints in μm for the GAS filters.