Chiller of the new laser amplifier , posted by Ronic Chiche at Optical room about utilities
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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 |
Chiller of the new laser amplifier , posted by Ronic Chiche at Optical room about utilities
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Today, the chiller worked at 17°C during 3 hours without error, no freezing nor flow sensor error.
Ronic
Chiche wrote:
We observed 2 issues for the chiller of the new CELIA laser amplifier: |
Smaract Controllers setting, posted by Ronic Chiche at Optical room about mechanics | lasers and optics | detectors and electronics 
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| Scheme of cabling of the SmarAct motors controllers for acting on Frep and CEP. |
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New valves cabling, posted by Ronic Chiche at Optical room about mechanics | vacuum
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Today, Manu and Eric changed the cavity valves pressure system to open and close them.
during the lock of the OneFive+Amp or of the Koheras, we saw a very noisy PZT signal at 30Hz with increasing/decreasing amplitude very slowly.
this noisy signal was not seen at the begining of the experiment. |
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New valve cabling and 30Hz noise PZT, posted by Loïc Amoudry at Optical room about lasers and optics | vacuum
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The Pneumatic valves are still coming back to "close" position.
Now the air bottle is always "open" to keep the valves "open".
The 30Hz noise is still here. We tried to cut off all the air flows. It only decreased the noise intensity but didn't change its shape. |
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new circuit breaker for the UPS, posted by Ronic Chiche at Optical room about cabling
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A new circuit breaker has been installed today before the UPS to fix the shutdown issues we observed some months ago when too many devices are connected
to the UPS.
it has to be tested... |
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Edge installation, posted by Ronic Chiche at Optical room about mechanics | vacuum
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19/06/2020
The first part of the edge installation was on done by Yann and Ronic
- close the 2 valves of the cavity |
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Operations before moving the optical table, posted by Ronic Chiche at Optical room about mechanics | vacuum | utilities
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Operations before moving the optical table from the optical room to the Igloo.
— the cavity has been filled with clean nitrogen to reach ambient pressure.
— the two valves have been closed using 5 bar air pressure to properly clamp them. |
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Moving the optical table to the Igloo, posted by Ronic Chiche at ThomX igloo about mechanics 9x
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This morning the Bovis company moved the optical table from the optical room to the Igloo without any problem.
The table is now stored inside the Igloo, just after the large entrance doors, on the right side.
It has been covered with plastic blankets. |
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ThomX housing roof opening, posted by Ronic Chiche at ThomX igloo about utilities
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Today, Yannick Petrilli removed 5 concrete bars (5-9) from the ThomX housing roof in order to let the optical table be installed on Wednesday with the
help of Bovis and Symetrie.
The safety net above the equiments has been removed too (one had to remove the hooks on one side to be able to slide the net). |
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Connecting the optical table to the ThomX ring, posted by Ronic Chiche at ThomX igloo about mechanics
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On the 19th of May, the optical table has been moved inside the ThomX concrete housing and connected to the Symetrie hexapod and to the electron ring.
Symetrie guys started to test the hexapod and they put some software limits around the predefined zero position. |
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Airflow installation, posted by Ronic Chiche at ThomX igloo about mechanics
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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. |
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Airflow installation, posted by Ronic Chiche at ThomX igloo about mechanics
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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.
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Cleaning, Motors Controllers mini-rack, hexapod controller, chiller and vacuum, posted by Ronic Chiche at ThomX igloo about detectors and electronics | utilities
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This morning with Manar, we started to clean the floor around the cavity, the outside part of the panels of the housing, and the optical table.
we will continue this afternoon and, in the end, we will make some dust measurements.
do we know who in ThomX is in charge of the cleanness of the casemate (bringing overshoes, sticky floor, cleaning company for the floor,...)? |
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Cleaning, Motors Controllers mini-rack, hexapod controller, chiller and vacuum, posted by Ronic Chiche at ThomX igloo about detectors and electronics | utilities
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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. |
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Vacuum in the mirror chambers, posted by Manar Amer at ThomX igloo about vacuum | cabling | software
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The electron ring has been vacuum inside it, but the valves connecting it to the two mirror chambers are closed. Before commencing to do measurements
on the cavity, we must place the mirrors under the proper vacuum and open the valves connecting them to the electron ring.
The vacuum system is consistent of three levels; Normal (max ~10^-3 mbar), turbo (max ~ 10^-7 mbar) and ionization.
With |
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Vacuum in the mirror chambers, posted by Manar Amer at ThomX igloo about vacuum | cabling | software
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the ionic pumps have been also connected this morning but not powered on, yet.
the vacuum group is waiting for a vacuum level below 10**-6 to power them on.
it should be the case this afternoon. |
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Installation update, posted by Ronic Chiche at ThomX igloo about mechanics | lasers and optics | vacuum | detectors and electronics | cabling | software
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This afternoon with Manar, we finished connecting FP-cavity mirrors motors and alignment mirrors motors to their 3 ISP controllers.
We also added an Ethernet hub on top of these controllers to merge the controller's connections to the computer.
We added some cable extensions to the alignment mirrors motors. |
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Installation update, posted by Ronic Chiche at ThomX igloo about mechanics | lasers and optics | vacuum | detectors and electronics | cabling | software
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after the WE, the right vessel vacuum level is 1.7e-7 mbar (primary + turbo pumps)
and the left vessel vacuum level is 1.8e-9 mbar (primary + turbo + ionic pumps)
I will ask Frederic to start the right vessel ionic pump. |
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Installation update, posted by Ronic Chiche at ThomX igloo about mechanics | lasers and optics | vacuum | detectors and electronics | cabling | software
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Now, both vessels are pumped by an ionic pump (both Turbo pumping entrances have been closed).
the primary pump has been removed from the left vessel.
we kept the primary pumping on the right part "in case of". |