We performed the preparation of the temperature control system for ETMX MN TILT oplev light source.
As reported in klog37797, we may need to start the temperature control system similar with ITMY and ETMY TILT oplevs.
When we arrived in Xend, all necessary items for temperature control system and LAN connection were ready, but power supply not be performed.
I set the power supply, the IP connection was succeeded (Ikeda-san checked.)
As shown in Fig.1. I installed the thermometer, heater and aluminum foil cover.
Ikeda-san set the target temperature + 1 deg. from current temperature, but the temperature increased very fast.
So, we tweaked the slope of heater power.
Fig.2. showed the before and after tweaking slope, almost similar values.
I will try to find the good temperature to minimize the glitch rate.
1. The situation didn't change just after the installing this system
Fig.1. showed the several channels before/after installing it.
The timing of the installing is the starting time of monitoring/controlling the temperature system.
Basically, the suspension was misaligned state after installing it.
As you can see in SUM signal MN oplev, the RMS was not changed so much.
(and 2 hours glitch can be seen? some instrumental noise?)
2. Temperature control system output was small?
As you can see also in Fig.1., the setting temperature was 25.3 deg. but the equilibrium temperature was about 25 deg.
That imply the heating power was not enough.
But as I will describe in next term, the ETMX glitch was not detected in current situation, we would like to keep this situation.
3. Check the ETMX suspension with LOCK_ACQUISITION state.
In this morning, I started the Xarm alignment.
In current situation, about 30 min, no glitch can be seen in ETMX MN TILT oplev.
(Some pulse like signal around - 22 min due to the initial alignment).
Conclusion:
The heater power of temperature control system would be low, but the glitch rate was so small compared from two days ago, so my suggestion is keep this situation until the glitch appeared again.
