LIGO Document T1000711-v1

Seismometers and the Insulation Box

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T - Technical notes
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Newtonian noise study at the former Homestake mine in Lead, South Dakota requires
computers for reading out data. When placed in the Homestake environment and not shielded
from factors such as humidity the computers will malfunction. For minimizing effects from
factors like this the computers will be placed in a box. The design of such a box is not easy to
come up with, and this summer an option for one such box was designed, tested, and decided
with small modifications it would be the correct type of box to use. Also, the Trillium T-240
seismometer is in the process of being mimicked and modified in attempt to create a seismometer
that will read seismic noise at higher frequencies near 10 Hz.
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