Run 3 at the k100 fridge in UMn was able to reach a base of 27 mK at the detector housing. Running with G9.

We took some data with the DCRCv2 board to measure the charge performance.

The charge noise performance of the v2 board is better than the v1 board. We did have some problems with some 1200 Hz noise, mostly presented on the qo channel. This was fixed by lowering the load on the 15V power supply.

These noise spectra are referred to the input coil of the SQUID amp for the phonon channel and to the input of the charge amp for the charge channels. The normalization for the phonon channel is suspect and we are reviewing the factors.

DCRC v1 phonon noise PSD and DCRC v2 charge noise PSD

A 137Cs source was used for preliminary data to test the data pipeline. We measured a preliminary line width of 2.5%. This is probably dominated by the crude data processing that has been performed so far. It is also clear that the trigger threshold was ~380 keV. More data were taken with a 133Ba source and with the ambient background in the lab.