- this morning the chiller leakage has been fixed by adding some Teflon on the faulty Swagelock adapter.
a long leakage test has to be done to be sure there is no leakage at all => can be done on Friday during our tests.

- here is a picture of the 2 Alphanov amplifier controller interlocks.
I2 has to be connected to the Sub-D15 connector of the SMC HECR008 chiller

This morning, I started the chiller and opened the valves on the external water circuit => no water leakage during the morning.

now, the chiller will stay ON all the time => we will check the installation at the end of the afternoon.

this afternoon, because of the test on the electron beam drive in the ring in the next days,
I removed the scope and the desktop computer (but not the display) installed close to the ThomX optical cavity.

they have been stored in the "Viktor" ThomX optical room.

Adding the instructions manual for the Alphanov Amplifier SMC Chiller

Installation and Maintenance Manual Water Cooled Thermo Con for Rack Mount HECR Series

If one needs to work with 3rd stage on the laser amplifier, one needs to make the safety patrol inspection before closing the bunker.

for that, it is mandatory to switch 2 keys on the "key board" in the control room, just before or just after the safety patrol :
- the THOMX key to 1
- the "EXPLOITATION LASERFP" key to 1

for the safety patrol, one has to push the "blinking white" buttons on the walls of the bunker, in the order from 1 to 6, and finish by the south entrance door button.
message " ronde en cours" is shouted during the process.
at the end of the safety patrol, an alarm is triggered for 30sec approx. and then stop.
now, the special keys located at the south entrance door are green and one has to take them (at least 2) to enter the bunker without breaking the safety patrol.

after finishing the controlled intervention, you just have to exit the bunker with the 2 keys and place them back in their location

then the controlled access (colored yellow) will turn to "access interdit" (red colored)

to terminate the closure of the bunker, you just have to turn the two key indicated in the previous image back to their original position.

since around 2 weeks, the airflow above the optical table housing has a power breakdown when one tries to switch it on.

the power breaker is in the electrical bay, on the left of the south entrance of ThomX.
the name of the power breaker switch related to the airflow is "TABLEAU ANNEAU 4".

today, with Kevin, we switched off all the airflow boxes 1 by 1 to find the defective ariflow box :
when we are face to the optical table housing panels, it is the third one from the left on the rear side.
this airflow box has been switched off (all the airflow boxes have a individual switch).
now, the airflow can be switched on again without any issue.

one needs to order 1 replacement box + some spare ones => mail to be sent to the AirC2 company.

Jean-Noel Cayla installed several days ago a Eaton 9PX 11kVA UPS inside the Igloo, outside of the ThomX bunker
and I asked him to place only 1 UPS plug on the wall close to the FP-cavity to supply only the NKT/OneFive oscillator and the Smaract laser cavity motors.

I checked that if I plug a device on this UPS plug, I'm able to follow the power, used by the device, on the UPS monitoring screen.

thus, this morning, I plan to switch off the laser oscillator and move its power cable from a standard plug to the UPS plug and test if we are able to find back the previous performances of the locking.

the present Smaract motor positions are : CH0 => +140µm / CH2 => -177.8µm
as unpowering the motor will put the read position at 0µm, I first go back to 0µm for both channel.
I will put them back at their original values after I plug the motors back to UPS.

finally I installed the OneFive laser, the Smaract motors of the laser and the Arduino Peltier controller of the laser on the UPS plug.
the power "seen" by the UPS is 0W, perharps because the used power is below 100W.
the UPS says it can last 385mn (> 6h) in case of power shut down.

I had to do 10mm step at 10mm/s speed on CH0 of the Smaract motors to get back the laser modelock.
then, I put back the CH0 position at +140µm and the CH2 position at -177.8µm on the Smaract motor.

the present level measured by the laser amplifier is 3.05mW after the power ON of the laser @ CH0=0µm
the level measured by the laser amplifier is 3.012mW after the power ON of the laser @ CH0=+140µm

the level measured by the laser amplifier is 3.125mW after the power ON of the laser @ CH0=+140µm when we switch ON the preamplifier
then, we are able to check the laser repetition rate @ 33.383MHz measured by the amplifier software.

I was able to lock back the FP-cavity.

at one moment, during the alignment optmization process of the infection mirrors of the FP-cavity, I had a huge misalignment moving Ma-Y motor.
I had to realign a lot this motor to get back to the standard power inside the FP-cavity.

=> maybe one needs to make some "walking" procedure on the alignment mirrors to get the best alignment => to be done

presently, the lock @32% of amp ratio produces 50kW inside the FP-cavity.
CH0 Smaract motor = 107µm
CH2 Smaract motor = -113µm
​