________________________________________________________________ Suggested Channels For "Deep Mine" Investigations Robert Schofield This is a list mainly of channels that monitor environmental signals that have been observed to couple to Hanford interferometer channels. Also listed are a few other channels that I consider important. If it is possible to "mine" a greater number of channels than listed here, I would use the original RDS lists. Coupling factors are rough (based on rough impulse transfer function measurements) and will differ in different parts of the listed bands. Hopefully, we will improve on them. Analogous channels at LHO are included because naming schemes for E5 occasionally differed between sites. As a possible starting point, I have starred my personal selections for the smallest PEM channel set (20 channels) that gives reasonably good coverage of Hanford 2k, and the Livingston analogs. ACOUSTIC COUPLING THROUGH COMPONENTS ON THE PSL TABLE: In the 50 to 1000 Hz band, a factor of roughly 5 increase over the LHO 2k PSL microphone noise floor for E5 should show up above the E5 noise floor of MC_F (roughly 300 Hz/Pascal). * H0:PEM-PSL2_MIC * L0:PEM-PSL1_MIC More remotely located sensors should also pick up signals that will couple acoustically to the interferometer at the PSL table: H0:PEM-HAM7_MIC H0:PEM-HAM8_MIC H0:PEM-HAM9_MIC H0:PEM-BSC4_MIC H0:PEM-HAM10_MIC H0:PEM-BSC8_MIC H0:PEM-BSC7_MIC SEISMIC COUPLING AT THE PSL TABLE: In the 50 to 500 Hz band, a factor of about 10 increase over the E5 noise floor for the X-axis PSL table accelerometer should show up above the E5 MC_F noise floor (roughly 0.01 Hz per um/s2 (probably dropping as 1/f) in the 150 to 400 Hz band). * H0:PEM-PSL2_ACCX * L0:PEM-PSL1_ACCX I prefer the X axis (beam axis) because of high coherence and because the coupling level is roughly consistent with doppler shift between the top of the periscope and the mode cleaner. Of course the other axes are useful also: H0:PEM-PSL2_ACCY H0:PEM-PSL2_ACCZ L0:PEM-PSL1_ACCY L0:PEM-PSL1_ACCZ More remotely located sensors: H0:PEM-LVEA_SEISX H0:PEM-LVEA_SEISY H0:PEM-LVEA_SEISZ H0:PEM-HAM7_ACCX H0:PEM-HAM7_ACCY H0:PEM-HAM7_ACCZ H0:PEM-HAM8_ACCX H0:PEM-HAM8_ACCY H0:PEM-HAM8_ACCZ H0:PEM-HAM9_ACCX H0:PEM-HAM9_ACCY H0:PEM-HAM9_ACCZ H0:PEM-BSC4_ACCX H0:PEM-BSC4_ACCY H0:PEM-BSC4_ACCZ etc. L0:PEM-HAM1_ACCX L0:PEM-HAM1_ACCY L0:PEM-HAM2_ACCY L0:PEM-HAM2_ACCZ L0:PEM-HAM3_ACCX L0:PEM-HAM3_ACCY L0:PEM-HAM3_ACCZ L0:PEM-HAM4_ACCX L0:PEM-HAM4_ACCY L0:PEM-HAM4_ACCZ L0:PEM-BSC1_ACCX L0:PEM-BSC1_ACCY L0:PEM-BSC1_ACCZ L0:PEM-BSC2_ACCX L0:PEM-BSC2_ACCY L0:PEM-BSC2_ACCZ etc. LINE NOISE COUPLING: H0:PEM-LVEA2_V1 H0:PEM-LVEA2_V2 * H0:PEM-LVEA2_V3 H0:PEM-LVEA_PWR1 H0:PEM-EY_V1 H0:PEM-EY_V2 * H0:PEM-MX_V1 H0:PEM-MX_V2 H0:PEM-MY_V1 * H0:PEM-MY_V2 L0:PEM-LVEA_V1 L0:PEM-LVEA_V2 * L0:PEM-LVEA_V3 * L0:PEM-EX_V1 * L0:PEM-EX_V2 Magnetometers also pick up line transients. Magnetometer transients not associated with line transients or seismic transients (e.g. those produced by distant lightning) have, to my knowledge, not yet been observed on interferometer channels. H0:PEM-BSC10_MAGX * H0:PEM-BSC10_MAGY H0:PEM-BSC10_MAGZ H0:PEM-BSC1_MAG1X * H0:PEM-BSC1_MAG1Y H0:PEM-BSC1_MAG1Z H0:PEM-BSC1_MAGX H0:PEM-BSC1_MAGY H0:PEM-BSC1_MAGZ * H0:PEM-COIL_MAGZ Z-axis isolated coil magnetometer L0:PEM-LVEA_MAG1X * L0:PEM-LVEA_MAG1Y L0:PEM-LVEA_MAG1Z L0:PEM-EX_MAG1X * L0:PEM-EX_MAG1Y L0:PEM-EX_MAG1Z * L1:GDS-EY_TO2 Z-axis isolated coil magnetometer OUT-OF-BAND SEISMIC COUPLING TO SUSPENDED OPTICS: At LHO, a factor of 10 increase in the 1 - 15 Hz band of seismometer signals has been observed to produce signals on interferometer control channels and shadow sensor channels even at out-lying stations (for example: vehicles, stomps, artillery shots). H0:PEM-EX_SEISX H0:PEM-EX_SEISY H0:PEM-EX_SEISZ H0:PEM-EY_SEISX H0:PEM-EY_SEISY H0:PEM-EY_SEISZ * H0:PEM-LVEA_SEISX * H0:PEM-LVEA_SEISY H0:PEM-LVEA_SEISZ * H0:PEM-MX_SEISX H0:PEM-MX_SEISY H0:PEM-MX_SEISZ H0:PEM-MY_SEISX * H0:PEM-MY_SEISY H0:PEM-MY_SEISZ * L0:PEM-EX_SEISX L0:PEM-EX_SEISY L0:PEM-EX_SEISZ L0:PEM-EY_SEISX * L0:PEM-EY_SEISY L0:PEM-EY_SEISZ * L0:PEM-LVEA_SEISX * L0:PEM-LVEA_SEISY L0:PEM-LVEA_SEISZ These excitations have also been seen on microphone and magnetometer channels listed above and those listed below. OTHER IMPORTANT PEM CHANNELS: Microphones at outlying stations: * H0:PEM-BSC5_MIC Mid-X * H0:PEM-BSC6_MIC Mid-Y H0:PEM-BSC10_MIC End-Y End-X not working for E5 * L0:PEM-BSC4_MIC * L0:PEM-BSC5_MIC Beam axis accelerometers for 2k Core optic and mode cleaner chambers: H0:PEM-HAM7_ACCX * H0:PEM-HAM8_ACCX H0:PEM-HAM9_ACCX * H0:PEM-BSC4_ACCX H0:PEM-BSC4_ACCY * H0:PEM-BSC7_ACCX H0:PEM-BSC7_ACCY H0:PEM-BSC8_ACCX * H0:PEM-BSC8_ACCY * H0:PEM-BSC5_ACCX * H0:PEM-BSC6_ACCY L0:PEM-HAM1_ACCX * L0:PEM-HAM2_ACCX L0:PEM-HAM3_ACCX * L0:PEM-BSC1_ACCY * L0:PEM-BSC2_ACCX * L0:PEM-BSC2_ACCY * L0:PEM-BSC4_ACCY * L0:PEM-BSC5_ACCX BSC3 missing INTERFEROMETER CHANNELS: * H2:IOO-MC_F * L1:IOO-MC_F * H2:LSC-CARM_CTRL * H2:LSC-DARM_CTRL H2:LSC-AS_Q H2:LSC-MICH_CTRL H2:LSC-PRC_CTRL H2:PSL-FSS_FAST_F * L1:PSL-FSS_FAST_F