The T1 cooling package was refilled to ~38cm and restarted. Shortly after restarting reservoir level dropped and settled to 37.8cm.

No visible leaks when viewed from the Meson Hall south walkway,level seems steady after ~1 hour of operation, water conductivity also returned to normal after a few minutes of flow.

All water PV green at EOD.

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UPDATE Feb 11:

At approximately 6.00pm yesterday, the water level in the expansion tank dropped to 36.4 cm, where it remained level overnight.

 All cooling system PVs stayed green overnight.

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UPDATE Feb 12:

Water level in the expansion tank remained level at 36.3 cm. Cooling package PVs all green.

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UPDATE Mar 27:

The T1-MK2 demin water flowrate was tuned to 1.1-1.2 gpm when in position 1 (12mm Be target). The profile monitor was actuated again in position 0 and confirmed to be working properly.

During this test, we found an odd 'stuck' state that the T1 system controls can enter where the control room operators became unable to turn off the cooling system. It turns out they don't have the ability to turn off single devices, like the pump, and can only turn off the whole system.

We likely arrived at this state by raising the ladder further, even though we were already at position 0 (manual jog button was used by the operator). As a result, flow was blocked and the water temperature ahead of the pump kept rising. This is actually quite a critical failure mode, in the future to prevent this problem, we should instruct control room operators to turn off the cooling system before driving the target ladder.

We solves this issue by asking Tony Tateyama to turn off the pump for us, likely his EPICS user account has the ability to turn off individual devices. With the cooling system turned off, we were able to complete the tests and tune the demin water flowrate.

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UPDATE Apr 3:

After the T2-MK2 target ladder was moved to the target station, the T2 cooling package was filled to 38.2cm and the cooling package was restarted after connecting services to the ladder. The water level in the expansion tank dropped to 32.8cm after restarting.

The level in the T1 cooling package dropped further to 34.9cm, which we assume is caused by trapped air that escaped the cooling system volume.

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UPDATE Apr 11:

T2 cooling package refilled to 38.3 cm, T1 cooling package refilled to 39.7cm.