[Ian, Sander, Torrey]

We are trying to take seismic data for buildings on campus. To do this we have borrowed a Wilcoxon 731A from the Cryo Lab. To calibrate this device we took it to the 40m and took measurements next to their seismometer doen the X-arm on Friday around 6 pm.

We first, for the Wilcoxon, we used the channel from elog 17717 that was not being used. In the image of the panel in elog 17717 we tried channel 5, with the corisponding channel name C1:X01-MADC0_EPICS_CH28 but it was a slow channel.

After struggling for a few hours we asked Koji if there was a fast channel we could use, and he lent us channel 4 on that board The channel was C1:ALS-X_SLOW_SERVO1_IN1, the X, Y, Z channels used for the 40m's seis were C1:PEM-SEIS_EX_Y_IN1 etc.. We then placed the borrowed wilcoxon 731A accelerometer (manual here) next to the one at the 40m. We used the one located at the X End of the 40m. Data was taken using diaggui of the power spectra of our seismometer and the x, y, and z directions of the 40m's. In addition the cross power spectrum and coherence between our seis and x,y,z of the 40m's. Rough plots of all this data can be found in the attached files as well as all of the raw data. Note we also took a 200s time series of the data just in case.

This should allow us to take seismometer data for around the swing space. Before we do we should double check what any additional gains the channel we plugged into is obtaining before readout.