Tilt- and Sensor-correction filter tuning at LHO

Document #:

LIGO-G1601529-v1

Document type:

G - Presentations (eg Graphics)

Abstract:

Using offline data, I quantified and tweaked the performance of the BRS tilt-correction filters, and quantified the performance of tilt-corrected Sensor correction in terms of injected low-frequency arm-length motion.

Files in Document:

• Mow-Lowry_LHO_BRS.pdf (2.8 MB)

Other Files:

• Mow-Lowry_LHO_BRS.pptx (1.9 MB)
• Proves that the BRS tilt-correction doesn't harm sensor correction even with 0 wind (BRS_arm_RMS_no_wind.pdf, 14.3 kB)
• Schematic of BRS signal path to the ISI stage1 (BRS_signal_path.pdf, 22.0 kB)
• Shows a factor of 4-5 improvement in RMS arm-velocity due to the BRS with 25mph wind (BRS_arm_RMS_25mph.pdf, 15.1 kB)
• Shows that with 25mph wind and low microseism, the RMS from the microseism is still bigger than the low-frequency injected RMS (Sensor_correction_vs_not.pdf, 6.0 kB)
• Tilt-correction performance before and after filter tuning, X-end (EX_tilt_correction_tuning.pdf, 24.1 kB)
• Tilt-correction performance before and after filter tuning, Y-end (EY_tilt_correction_tuning.pdf, 25.3 kB)

Topics:

• Commissioning
• Seismic Isolation

Authors:

• Conor Mow-Lowry
• Krishna Venkateswara
• Jeffrey Kissel

Keywords:

BRS seismic tilt sensor correction

Referenced by: