Sensor Noise Estimates for Advanced LIGO Seismic Isolation Systems

Document #:

LIGO-T0900450-v3

Document type:

T - Technical notes

Abstract:

Describes the noise estimates, and a simple matlab function which contains them, for the SEI systems

Files in Document:

• sensor_noise_estimatesv3.pdf (1.2 MB)

Other Files:

• SEI_sensor_noise.m (5.9 kB)
• plot_SEI_sensor_noise.m (1.7 kB)
• summary_sensor_noise_plotv3.pdf (27.1 kB)

Topics:

• Requirements
• Preliminary Design
• Basic R&D
• Seismic Isolation
• Final Design

Authors:

• Brian Lantz

Keywords:

seismometer geophone gs-13 l-4c

Notes and Changes:

The most recent version of the matlab files lives in the seismic SVN at
https://trac.ligo.caltech.edu/seismic/browser/Common/MatlabTools/SEI_sensor_noise.m

IMPORTANT: If you download the matlab files, please put yourself on the watchlist for this document, because I plan to update the matlab code at least once in version -v3.

V2 includes the GS-13 measured data plot, and some pretty good T240 data.

V3 just takes the T240meas down to 10 mHz (with a WAG)

This contains the noise for the sensors in the BSC-ISI, but is still missing the Kaman and the STS-2, and most of the frequency response data. The updated version will also live the seismic SVN. BTL, Sept 26, 2009

Related Documents:

• LIGO-T0900449: Changing the op-amp for the L-4C seismometer preamp