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
​

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.

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.

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.

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.

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.

Adding the instructions manual for the Alphanov Amplifier SMC Chiller

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

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.

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 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 with Aurélien, we filled the water tank of the chiller and we opened the water valves (last pipes on water arrival/departure panel).

there is no leakage on the external water circuit but there is a small one on one of the Swagelock adapters of the water circuit connected to the Alphanov Amplifier.
we will add some Teflon to remove the leakage.

- the chiller alarm can be connected to the interlock detection of the Alphanov amplifier (I2 connector).
we will have a closer look at the different connectors next time, as the Alphanov manual is not very clear on how to connect them together.

This afternoon with Yann:
- we changed the shutter base plate position to center the beam axis with the mirrors center => to be checked with the amplifier beam
- on the L-shaped arm, the axis along the cavity beam has been centered. it should be never moved !!! (it corresponds to the less accessible knob).
Yann confirmed the 2 other translation axis of the L-shaped arm follow the back plate position.
These 2 axis have been positioned to put the L-shape plate completely of the beam path.
- the panel of the housing which was shifted has been fixed. now, it is properly aligned.

This afternoon, an electrical operation will be done in ThomX, impacting possibly the casemate power supplies.

Then we shut down all the equipment.

this afternoon with Viktor, we redid all the power supplies connexions.

4x cables are now connected to the wall sockets.
- 1x extension cable for the mini-rack multi-sockets cable.
- 3x triple-sockets long cables (3.5kW each).

all other cables have been removed and replaced.

we brought the other half-rack next to the first one.

The One Five laser and its controller have been moved from PLIC to ThomX Iglo.

In preparation to Install the Amplifier from Alphanov

The new iris mounts fixed on the small cavity windows.

Need additional 2 irises.

In order to find the Alignment of the ThomX cavity, Yann built mounts that could be placed directly on the windows outside the cavity, where we can place an iris at the center.

The center of the iris on the mount corresponds to the center of the mirror.

4 were made, big one for the injection and 3 small ones for the other windows. 

The big one fits, but the small ones don't fit, as the heads of screws exceed the circle boundary.

A change to them will be done so that they will fit where they will be clipped from the side.

On Friday the 5th of November, ThomX suffered again from a power breakdown.

all the pumping systems had to be restarted.
this produced a vacuum level increase and the FP-cavity valves shut off for security reasons.

Today the vacuum level is good enough and the 2 FP-cavity valves have been reopened by Eric Mistretta.

as the vacuum level was good enough, I asked Eric Mistretta to open the 2 valves of the FP cavity.

He said the vacuum group made several tests during the last days, opening and closing these valves!
I asked him to not open and close them as it could release some dust on the mirrors.

Eric opened the valves in "local mode", using directly the valves controller (see attached image).
He was unsure of what could happen if he switches to the "remote mode"... the valves could be commanded to close again.
so, for the moment, one stays in "local mode".

after opening the valves, the vacuum level started to decrease inside FP-cavity :
9.7e-10 mbar for the left vessel
1.7e-9 mbar for the right vessel

Pressure is 1.4e-9 and 2.6e-9 mbar this morning.