CALVA Health check-up process
Here we will give the general process for the weekly health check-up for CALVA experiment.
The results should be noted inside the corresponding excel file available inside the in2p3 box.
- First check the temperature inside both cleanroom.
- Check if SHG2 temperature is locked. If not, correct it and then lock it.
- Check if SHG1 and SHG2 are locked, then put them in « scan mode ».
- See that the VPM respond to the « scan mode » command and also note the TolmFrameBuilder latency value.
- If the alignment is deemed insufficient, then correct it.
- Note the value of the TEM00 peak for both SHGs.
- Re-lock SHG1 and SHG2.
- Check Pump power at the entry of the MZ.
- Check FCC power behind the 1st mirror after the dichroic.
- Check the contrast of the MZ.
- Check the locking of the MZ.
- Check the LO, Seed and FCV power inside the power distribution hub
- Check if OPO temperature is locked. If not, correct it and then lock it.
- If the OPO need re-alignment, proceed before taking the value measurement.
- Check the Pump TEM00 peak depth (Be careful of the baseline).
- Check Seed TEM00 peak value on the HD add channel.
- If OPO re-alignment has been done, note the value of the MCL TEM00 peak. To align and mesure the MCL, the 2 first density on the in-air table should be removed and a photodiode should be place in transmission of the OPO (For the sake of having a reference, use a PDA10CS-EC with 50 gain).
- Check the MCL power on HD add channel.
- Check the LO power on SERV18_0 and SERV18_1.
- Check the PLL IR beating value.
- Send 50mW of Pump toward the OPO and check the PLL green beating value.
- Check the locking of the PLL, on IR and then on green.