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ID Date Author Type Category Subject Text   6295   Sat Feb 18 16:58:59 2012 kiwamu Update IOO MC suspension realigned [ Den / Kiwamu]  We have realigned the MC suspensions so that      6296   Sat Feb 18 17:01:26 2012 Den Update Adaptive Filtering static variables In order to prevent different DOF from redetermining static variables in the adaptive code, I've created a separate code for each      6297   Sat Feb 18 18:29:38 2012 Den Update Adaptive Filtering online filtering I tried to filter MC_F from seismic noise measured by GUR1 seismometer. I've used 8000 tap filter, downsample ratio=8, delay=1.      6298   Tue Feb 21 04:30:02 2012 kiwamu Update LSC Y arm + PRMI I tried the "Yarm + PRMI" configuration to see what happens.      6299   Tue Feb 21 08:33:16 2012 steve Update Green Locking periscope adapter plate Two extender plates ready for cleaning. The existing optical table tops have 38" OD. Using two of these the OD will be 44"      6300   Tue Feb 21 16:10:29 2012 kiwamu Update IOO degradation in input PZT1 PZT1, the one with Koji's custom mid-HV driver (#5447      6301   Tue Feb 21 18:39:11 2012 kiwamu Update Green Locking New BBPDs installed Two new BBPDs have been installed on the PSL table. The first one was installed by Koji      6302   Tue Feb 21 22:06:18 2012 jamie Update LSC beatbox DFD installed in 1X2 rack I have installed a proto version of the ALS beatbox delay-line frequency discriminator      6303   Wed Feb 22 01:53:57 2012 kiwamu Update LSC update on glitch table I tried SRMI. The glitch rate wasn't as high as that of PRMI but it happened once per      6304   Wed Feb 22 13:28:22 2012 kiwamu Update LSC Y arm + central part locking Last night I tried the "Y arm + central part" locking again. Three      6305   Wed Feb 22 16:55:16 2012 Jamie Update SUS wacky state of SUS input matrices While Kiwamu and I were trying to investigate the the vertex glitches we were noticing excess noise      6306   Wed Feb 22 19:45:33 2012 kiwamu Update LSC how much length offset do we need ? I did a quick calculation to see if the offset of the arm length which I tried last night      6307   Thu Feb 23 02:20:07 2012 Zach Update SUS wacky state of SUS input matrices This reminds me that the whole Dr. SUS situation never got taken care of. Where      6308   Thu Feb 23 09:09:33 2012 steve Update SAFETY safety checks Emergency exit lights were inspected:  2 out of 13 batteries have to be replaced One of the Halon fire extinguishers      6309   Thu Feb 23 10:53:54 2012 steve Update SUS oplev PIT transfer functions  Oplev transfer functions PIT UGF were optimized to be at 2-3 Hz with 60 degree minimum phase margin by adjuting oplev gains.      6310   Fri Feb 24 03:58:13 2012 kiwamu Update LSC Y arm + PRMI part II I tried the Yarm + PRMI configuration again.       6311   Fri Feb 24 04:12:44 2012 kiwamu Update SUS freeswing test The following optics were kicked: MC1 MC2 MC3 ETMX ETMY ITMX ITMY PRM SRM BS Fri Feb 24 04:11:15 PST 2012 1014120690        6312   Fri Feb 24 08:06:52 2012 steve Update SUS sus restored                                6313   Fri Feb 24 15:01:31 2012 kiwamu Update LSC Y arm + PRMI part II The figure below shows the time series of the Y arm + PRMI trail.      6314   Fri Feb 24 16:10:48 2012 mike Update Computers PyNDS and a Plot Power Spectral Density plot using PyNDS, comparing 5 fast data channels for ETMX. **EDIT** Script here:      6315   Fri Feb 24 18:37:13 2012 rana Update LSC Y arm + PRMI part II                                6316   Fri Feb 24 18:59:04 2012 Jenne Update Computers PyNDS and a Plot                                6317   Fri Feb 24 19:18:28 2012 kiwamu Update LSC Y arm + PRMI : how they should look like I calculated how the DC signals should look like in the Y arm PRMI configuration.      6318   Fri Feb 24 19:25:43 2012 jamie Update LSC ALS X-arm beatbox added, DAQ channels wiring normalized I have hooked the ALS beatbox into the c1ioo DAQ.  In the process, I did some rewiring so that the channel mapping corresponds      6319   Fri Feb 24 23:14:09 2012 kiwamu Update CDS tdsavg went crazy I found that the LSCoffset script didn't work today. The script is supposed to null the electrical offsets in all the LSC channels.      6320   Sat Feb 25 00:37:42 2012 kiwamu Update SUS oplev spectra during PRMI lock Somehow the angular stability of the central part have not been so great.      6321   Sat Feb 25 14:27:26 2012 kiwamu Update LSC glitches in the RFPD outputs Last night I took a closer look at the LSC analog signals to find which components are making      6322   Mon Feb 27 10:21:37 2012 steve Update SAFETY safety audit tomorrow morning                                6323   Mon Feb 27 14:35:22 2012 steve Update SUS oplev YAW transfer functions  The BS and the PRM have 3.3 Hz resonant gain filters that kill the phase margins.        6324   Mon Feb 27 14:35:37 2012 Jenne Update Green Locking PSL Beat Setup Xarm is aligned for both IR and green.  Here is a photo of the beam paths of the PSL beat setup.  I want to make      6325   Mon Feb 27 18:33:11 2012 jamie Update PSL what to do with old PSL fast channels It appears that the old PSL fast channels  never made it into the new DAQ system.  We need to figure out what to do with them.      6326   Mon Feb 27 18:35:45 2012 Jenne Update Green Locking X Beat Search Meh.  I've searched in steps of 20 counts in C1:GCX-SLOW_SERVO2_OFFSET units (16 bit +\- 10V DAC, and 1GHz/V coeffecient      6327   Mon Feb 27 19:04:13 2012 jamie Update CDS spontaneous timing glitch in c1lsc IO chassis? For some reason there appears to have been a spontaneous timing glitch in the c1lsc IO chassis that caused all models running      6328   Mon Feb 27 21:26:22 2012 Den Update PEM seis box I did liso simulation of the circuit in the seis box. I think that AD620 (first amplifier in the circuit) noise might be much less      6329   Tue Feb 28 11:20:51 2012 steve Update SAFETY safety audit 2012 Correction list by visiting safety committee, Haick Issaian is not shown: 1,  update laser, crane operator      6330   Tue Feb 28 12:00:54 2012 kiwamu Update LSC installed anti-whitening filters I found that none of the filter banks in the LSC input signals have the precise anti-whitening      6331   Tue Feb 28 15:48:32 2012 kiwamu Update LSC installed anti-whitening filters I installed the rest of the precise anti-whitening filters. Now all of the LSC sensors have the right filters.      6332   Tue Feb 28 16:12:59 2012 Den Update Adaptive Filtering lunch talk  Just to be clear what I said at the meeting, I write all this down here. Adaptive filtering of real signals (MC_F and GUR1_X)      6333   Tue Feb 28 16:31:08 2012 Suresh Update Electronics REFL165 repair: Characterization The transfer function and current noise were measured.  The location of the peak shifts with the amount of incident light      6334   Tue Feb 28 16:39:25 2012 kiwamu Update LSC MICH and PRCL signals in a simulation I briefly ran a Optickle code to see how the PRC macroscopic length screws up the sensing matrix in the PRMI configuration.      6335   Tue Feb 28 16:44:56 2012 rana Update LSC MICH and PRCL signals in a simulation    Like I said, this is possible if you fail to set      6336   Tue Feb 28 20:49:33 2012 kiwamu Update LSC insalling OSA I am installing an OSA on the AP table and it's ongoing. I am leaving some stuff scattered      6337   Wed Feb 29 00:22:35 2012 Suresh Update Electronics REFL165 repair: Installed on the AS table 1) The REFL165 has been replaced onto the AS table. 2) When the PD interface cable is      6338   Wed Feb 29 01:02:06 2012 Den Update PEM seis box measured I've measured the input signal to the seismic box from seismometer Guralp 1. The spectrum of the signal in the "input +"      6339   Wed Feb 29 01:14:40 2012 Suresh Update Electronics REFL165 repair: Characterization                                6340   Wed Feb 29 04:23:14 2012 kiwamu Update LSC REFL OSA installed I placed the OSA (Optical Spectrum Analyzer) on the AP table and this OSA will monitor      6341   Wed Feb 29 17:32:11 2012 Mike Update Computers PyNDS and a Plot                                6342   Wed Feb 29 20:27:00 2012 Jenne Update Green Locking X green beat - found it! Found it! The actual temperature of the Xend      6343   Thu Mar 1 00:05:23 2012 Den Update PEM seis box noise I've moved GUR1 seismometer from MC2 to the working tables in order not to disturb the MC while working with the seismometer      6344   Thu Mar 1 09:26:50 2012 steve Update SUS SOS baffle plates are ready  Green welding glass 7" x 9"   shade #14 with 40 mm hole and mounting fixtures

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