To lower the Neovan head temperature we plugged it on a dedicated circuit and chiller (which is also located in the chiller room, borrowed from W. Chaibi).

The Neovan head is shown in photo 1. We closed the two valves connected to the main chiller (photo 2) and connected the Neovan head to the to yellow and green coming from walid's chiller (photo 3 and 4).

The temperature is now stabilized around 26-27 C : the beam is better matched on the PMC (1,5% increase of transmission from the neovan and 5% more in transmission in the PMC) and the rms of the PSTAB has lowered (plot 5)