Attached are plots of the 7 tap test locations on the FMY performed yesterday afternoon. Data was exported from the PULSE software to a text file and imported into Matlab. For this measurement, a metal tip on the B&K hammer was used as opposed to the rubber tip used in previous measurements.  A new template ("Simple Hammer Display 3.pls") in the PULSE software was used according to T1000697-v2.

The plots each have the 3 DoFs from the accelerometer used and are plotted according to location.  The FMY M1 Damping Loops were closed and the ISI floating.  The plots show the response trending upwards from ~100Hz and higher as in previous results.  However, previous measurements saw this upward trend in magnitude beginning from ~10Hz.  Here, the trend is a decrease in magnitude from the lowest frequencies to ~100Hz.  

For these measurements, the accelerometer was placed on the back side of the FMY (i.e. the side facing opposite the ITMY) due to accessibility. A description of the locations on the FMY are as follows:

location1 - back side of fmy beam tube side just above the accelerometer
location2 - side of M2 hitting away from beam tube
location3 - M2 cross brace downwards
location4 - M1 cross brace downwards - straight cross brace
location5 - top side from beam tube going away - above M1
location6 - straight cross brace on M2 on clean room side
location7 - cross brace on M2 clean room side

Data was also taken for the ITMY QUAD structure, however, there was a data corruption issue encountered in data from 5 of the 7 locations.  Measurements on the ITMY QUAD will be re-taken with time permitting before cartridge install.