Sensor Noise Estimates for Advanced LIGO Seismic Isolation Systems (SEI_sensor_noise.m)

Document #:

LIGO-T0900450-v4

Document type:

T - Technical notes

Abstract:

Describes the noise estimates, and a simple matlab function which contains them, for the SEI systems as well as other sensors used at the observatories to characterize seismic noise and the ADC used to read out the sensors.

The latest version function that generates these curves lives in the aLIGO Seismic Group's SVN repository here:
https://svn.ligo.caltech.edu/svn/seismic/Common/MatlabTools/SEI_sensor_noise.m
(Note this DCC file card is infrequently updated -- best to check the SVN location for the latest code. Rev 9127 has been posted here.)

Files in Document:

• summary_SEI_sensor_noise_plotv4.pdf (70.0 kB)

Other Files:

• SEI_sensor_noise.m (13.0 kB)
• plot_SEI_sensor_noise_v4.m (3.7 kB)
• sensor_noise_estimatesv3.pdf (1.2 MB)
• summary_GS_16bit_ADC_noise_plotv4.pdf (19.2 kB)
• summary_PEM_sensor_noise_plotv4.pdf (46.1 kB)

Topics:

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

Authors:

• Brian Lantz
• Jeffrey Kissel

Keywords:

seismometer geophone gs-13 l-4c

Notes and Changes:

Technical Note has not been updated to include new sensors. Check code notes for most up-to-date description of from whence the data came.

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Related Documents:

• LIGO-T0900449: Changing the op-amp for the L-4C seismometer preamp
• LIGO-E0900426: HEPI Kaman Sensor Receiving Analysis