Kiwamu I, Ollie P, Michael R, Chris S

We were able to get the diode chiller back online with the new flow meter that arrived from technotrans. However, the flow was now over the threshold of 30 lpm. After talking with Ollie, we decided to increase the threshold to 32 lpm and the diode chiller was able to run continuously. The flow on the table measured by the uncalibrated channel H1:PSL-MIS_FLOW_OUTPUT was reading the same as before the chiller shut off, so it may be a calibration issue with the new flow meter.

While waiting for the new part to arrive, I thought it would be a good idea to work on the chiller hoses and connections. When the first chiller broke, I quickly set up the spare chiller with shorter hoses and plastic fittings thinking it would be a temporary fix. Today we were able to swap out the parts with longer hoses and stainless steel fittings (what it really should be) on both chillers. However, the crystal chiller shut off due to low flow through the amplifier and powermeters, and soon after the powermeter flow sensor went dead. Kiwamu and I went inside the H1 PSL to look at the manifold under the table, and managed to get the sensor back through some combination of hitting it to loosen particles, letting water flow through the return path into a bucket, and pulling apart the outer shell of the sensor. I really don't know how we got it to work, but it's working again, and we then were able to turn the laser on.