aLIGO LHO Logbook

H1 ISC (DetChar, PEM, SEI)

nutsinee.kijbunchoo@LIGO.ORG - posted 12:34, Monday 16 March 2015 - last comment - 16:02, Tuesday 17 March 2015(17278)

WIND ALS ISI Correlations

Sheila, Nutsinee

Attached below are the plots of PEM/ALS and PEM/ISI correlations. Using data from March 14 (we had high wind up to 45 MPH). The x-axes are wind speed in mph, the y-axes are either ALS-X(Y)_REFL_SCTRL_OUT_DQ (rms) or ISI-ETMY_ST1_FFB_BLRMS_(DOF)_(100M or 300M)_(300M or 1) (mean). The correlation (r) is calculated and printed in the parentheses. Since PEM-EX and ALS-Y seems to correlate the most (r=0.7783) I only plot the correlation between PEM-EX and ISI-ETMY for the PEM/ISI correlation. PEM-EX and ISI-ETMY-RY (100-300 mHz) appears to have the highest correlation (r = 0.7469).

A Matlab script also attached.

Images attached to this report

Non-image files attached to this report

plot_script.m

Comments related to this report

nutsinee.kijbunchoo@LIGO.ORG - 16:02, Tuesday 17 March 2015 (17289)

Link

My apology for the lack of axes labels earlier. I have attached better plots below....

Also, note that PEMEX, PEMEY, and PEMCS is in X, Y, Z direction (not locations). Also, the "ISI-ETMY_ST1_FFB_BLRMS_(DOF)_(100M or 300M)_(300M or 1) (mean)" are band-limited RMS of the T240s on stage1 ISI.

Images attached to this comment