This afternoon, we continued to clean the housing with Manar and Daniele.
we did a dust measurement after cleaning with the two ceil doors opened and the dust meter in the middle of the table, and it counted ZERO!
it doesn't mean the housing is perfectly clean but it is clean enough to pay attention now to cleanness.

Then from today, we have to wear overshoes at the entrance of the ThomX casemate and wear clean coats below the airflow (we installed the coats inside the FP-cavity airlock).

for cabling motor controllers, we discussed with Aurélien about the Alphanov amplifier position on the optical table.
we don't have the last schemes... so, Aurélien sent an email to Guillaume Machinet and Yann to get them.
normally we could let the computer inside the casemate close to the optical table while the electron beam is not filled inside the ring.
as it is dumped on the opposite side of the casemate, the computer position should be radiation safe for now.

One half-height rack, close to the optical table, has few network devices BUT takes almost all the rack place!
we could easily fit the hexapod controller in this rack with "logical" cabling.

We observed 2 issues for the chiller of the new CELIA laser amplifier:

• setting the water temperature to 17°C, the chiller water turns to ice close to the water filling port !!! => temperature too low ?
• even when the water is fluid, one has a flow sensor error ! => pump charge too strong ? => reduce the water pipe length.

We have set the water temperature to 20°C and we shortened the water pipes by 2-3m

         => both problems seem to be fixed.

Now, we can try to reduce the setting temperature.

Today, the chiller worked at 17°C during 3 hours without error, no freezing nor flow sensor error.

- 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 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.

Adding the instructions manual for the Alphanov Amplifier SMC Chiller

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

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.

On the 27th of May, the Airflow has been dismounted from the optical room to be mounted around the optical cavity by the AirC2 company.

here is email from Yann :

Le flux est rentré dans la casemate.
Lundi la société AirC2 revient pour installer les rideaux.
Petits couacs :
- 2 plaques de faux plancher à découper
- le saut de loup à été déplacé (à voir si c'est OK pour tout le monde)
- filet de toit à retendre
- poutres du toit à remettre
- main courante du faux plancher à retirer
- attention au coin du flux au niveau du saut de loup (à baliser et protéger)

The AC plug and the power cord of the airflow were quite hot because they have been dimensioned for 16A current and the total current is above.
AirC2 company should replace them with 32A equipment (6mm2 power cord + 32A Hypra AC plug) in the next days.