Sudarshan K, Rick S, Darkhan T. Pcal beam power measurements were taken at EndY. Measurements inside TX module: OFS PD outputs 3720 counts, 2.25 V. TX PD outputs 1592 counts. Laser power: 2 W. Servo loop is open. Heat sink is not installed. Power measurements before any optics (after the laser shutter) at different voltages: 1.05 W at 3.0 V 1.35 W 3.5 V 1.60 W 4.0 V 1.86 W 4.5 V 2.07 W 5.0 V Power measurements, laser power set at 5 V: OFS PD: 9.06 V 14850 cts. 2.72 mW TX PD: 4.2 V 6930 cts. 10.1 mW Power meter is used with OD1. NE01A-B + NE02A-B attenuators attached to OFS PD. Power reading inside of TX module between two lenses (combined power of two beams going to ETMY): 1.69 W. Measurements of two beams at the TX module: Inner beam: 844 mW Outer beam: 824 mW Measurements of two beams at the RX module: Inner beam: 827 mW Outer beam: 810 mW Both beams combined: 1.63 W RX PD mon (both beams combined) output: 10.3 V Pictures of Pcal spots on ETMY (f/22, 30 sec): LHOetm_0250.jpeg - inner beam only on ETMY (outer beam is blocked) LHOetm_0251.jpeg - outer beam only on ETMY LHOetm_0252.jpeg - both beams We left Pcal laser ON, beams on ETMY.
This morning I focused the ETMx GiGe camera (CAM 25) in IR. I had to zoom in closer to the optic to get the pitcure into focus. For reference, attached are photos of ETMX before zooming in and after zooming in (which is the current camera configuration).
Using Dave's extract from the Guardian logs since the RCG 2.9 restart to generate an exclude file. I've loaded SDF Tables for all LHO HPIs (except HAM1.) Attached is a snap of the donot monitor file; this is Dave's file with filter module core names removed (Guardian uses ezca which doesn't have to use a complete name to manipulate a switch) and the HPI MASTER_SWITCH added (the SEI Manager toggles this switch, not the HPI Guardian.) Also in the image is the difference table from the SDF before the donot_monitor list was added. After updating the Table, the diff list went to zero channels.
All HAM HPI currently have no diffs--let's keep it that way. The BSC HPIs have a few diffs (1-4,) these are a few ISC settings and sensor correction gains that need to be corrected by updating the safe.snap value. Fab tool!
Thanks to Dave & Jonathan.
All HEPI safe.snaps and exclude lists are committed to the svn from /opt/rtcds/userapps/release/hpi/h1/burtfiles
J. Warner, A. Pele, J. Kissel Jim has improved the isolation loop design for the HAM2, HAM3, HAM4, and HAM5 ISIs by increasing the frequency / aggression of the Level 3 isolation filters (along with tweaking the UGF and high frequency rolloff such that the aggressive boost remained stable). As such, we have a great deal more feedback gain in the 0.5 to 5 [Hz] region of all DOFs for these HAMs -- the region where the noise performance is typically loop gain limited -- and therefore the performance improvement has scaled linearly with the gain increase. See "IsoFilterComp" attachments. We didn't have noise budget yet to prove it, but Jim had recognized that HAM6, the most recently designed chamber had much better performance, and much high boost frequency. Arnaud has gathered performance data comparing platform displacement before and after the change, which confirms the goodness locally. See "PerformanceComp" attachements. We didn't grab / compare the rotational degrees of freedom but these have also improved. Now that Arnaud has installed properly-matched, sensor correction, gains (see LHO aLOG 16208), we should expect a little bit better translational performance, so we'll compare again and make sure we capture rotational DOFs. Further, we plan to use calibrated DRMI cavity control signals to ensure that what we've done locally is good for the IFO. The parameter files for these new current designs can be found here: HAM2/Scripts/Control_Scripts/Version_3/Hori_ISO_H1_HAM2_Lv3_HR_2014_10_23.m HAM2/Scripts/Control_Scripts/Version_3/Vert_ISO_H1_HAM2_Lv3_HR_2014_10_22.m HAM3/Scripts/Control_Scripts/Version_3/Hori_ISO_H1_HAM3_Lv3_IMC_HP_2013_01_16.m HAM3/Scripts/Control_Scripts/Version_3/Vert_ISO_H1_HAM3_Lv3_IMC_HP_2013_01_16.m HAM4/Scripts/Control_Scripts/Version_3/Hori_ISO_H1_HAM4_Lv3_HR_2014_09_22.m HAM4/Scripts/Control_Scripts/Version_3/Vert_ISO_H1_HAM4_Lv3_HR_2014_09_16.m HAM5/Scripts/Control_Scripts/Version_3/Hori_ISO_H1_HAM5_Lv3_2014_09_25.m HAM5/Scripts/Control_Scripts/Version_3/Vert_ISO_H1_HAM5_Lv3_2014_09_25.m
The start of the path to the filter parameter files indicated is /ligo/svncommon/SeiSVN/seismic/HAM-ISI/H1/HAM(#)/Scripts/Control_Scripts/Version_3/(filenames)
8:38 Rick to EX to pick up PCal equipment
9:30 Benton PUD on site
9:32 Fil to LVEA working on PEM mics
9:38 Karen to MY
9:40 Rick done at EX, heading to EY for PCal work
9:57 Jeff and Andres to LVEA for cleanup
10:09 Jeff and Andres out of LVEA
10:45 Benton PUD off site
11:00 Pepsi truck on site
11:10 Karen done at MY
12:23 Fil back to LVEA PEM work
14:00 Fil kicked out of LVEA by mean commissioners :(
I have turned up the preamp gain on the LSC-Y_TR photodiode (a PDA100A on ISCTEY) from 0 dB to 20 dB. The BS immediately before this PD is a BS1-1064-50-2037-45P.
The LSC-TR filter banks have been adjusted as follows:
Somehow these values were overwritten with the old values around 2015-01-24 03:37:00 UTC. I've restored the new values.
Reminder, if you wish to edit the site map, please do so in the /opt/rtcds/userapps/release/cds/h1/medm directory.
Please do not do it in the /opt/rtcds/lho/h1/medm directory as this breaks the symbolic link and the change does not get committed to the SVN version control repository.
Over the last couple days I have made a couple of housekeeping updates to the IFO_ALIGN screen:
I repeated the study I did on the L1 ADC hold times ( aLOG entry 16455 ) using date from H1. It is running the tagged RCG 2.9 and has higher thresholds (MAX_ADC_WAIT_CARD_0 of 20, MAX_ADC_WAIT_CARD_S of 3).
Here, I record values from the IOP model proc file (i.e. cat /proc/h1ioplsc0/status on h1lsc0)
FE | Max Hold | ADC#0 Max | Max Delta |
---|---|---|---|
h1lsc0 | 22 | 21 | 1 |
h1susb123 | 23 | 21 | 2 |
h1sush34 | 25 | 21 | 2 |
h1sush56 | 24 | 21 | 2 |
Again, in most cases ADC#0 Max + Max Delta = Max Hold. It does appear that better limits of 23 and 5 for MAX_ADC_WAIT_CARD_0, MAX_ADC_WAIT_CARD_S (from L1 data) would work here. The current CDS bugzilla issue is Bug 791
Last week, sts correction gains were measured and calculated on HAM4/5/6 to improve the CPS sensor correction. We measured them today for the remaning chambers.
For the BSC chambers, we locked the platforms to the ground by increasing the blends to 750mHz (cf alog) and turned off the sensor correction. We measured the ratio between the T240 (stage 1) and the STS (ground) signal (should be 1 with the platform moving with the ground). The same measurement was also carried out between STS and L4C for hepi, since IPS sensor correction is used for the Z DOF.
All the measurements using the corner station STS B as input to the sensor correction (ITMX, BS, ITMY) show a factor of two mismatch with the hepi and platform sensors in the X DOF only. There is certainly a calibration error with the STS B seismometer. I checked the calibration filter in the input filter banks and it looks correct (10.17 nm/s /cts). We should investigate more. The other chambers and dofs need a relatively small correction.
The ISI gains (T240/STS for BSCs and GS13/STS for HAMs) are
X | Y | Z | |
HAM2 | 1.036 | 0.995 | 0.877 |
HAM3 | 0.976 | 0.958 | 0.812 |
ETMX (T240 for gnd sensor) | 1.114 | 1.106 | 1.105 |
ETMY | 0.985 | 0.974 | 0.995 |
ITMX | 1.964 | 0.976 | 0.993 |
ITMY | 1.982 | 0.984 | 0.993 |
BS | 1.99 | 0.986 | 0.994 |
The BSC - HEPI gains (L4C/STS) are
X | Y | Z | |
ETMX | 1.110 | 1.107 | 1.091 |
ETMY | 0.998 | 0.991 | 0.969 |
ITMX | 2.167 | 1.063 | 0.972 |
ITMY | 2.011 | 1.006 | 0.963 |
BS | 2.09 | 1.055 | 0.924 |
Attached are examples of the transfer functions for ITMY
To calculate the gains I wrote a script for the bscs in a similar fashion as Sebastien's : it is called BSC_gain_matching_calculation(IFO,Chamber,start_time,duration) located under /ligo/svncommon/SeiSVN/seismic/BSC-ISI/Common/Misc. The results above were obtained using the following parameters :
start_time=tconvert('01/22/2015 15:35') ;
duration = 45*60 ;
The sensor correction matching gains were changed to their new values for the BS ITMX and ITMY in the X dof. The pdf attached are comparing the X platform motion before/after the change, showing improvement (x~2) in the 300mHz 700mHz band.
I confirmed that the factor of two mismatch described in the log above comes from the STS B, looking at the comparison of the three ground seismometers (X dof) of the corner station, see attached screenshot.
It looks like the problem is in the B STS or associated cabling. I took spectra of the raw ADC signal and the B seismometer shows half as much X signal (ADC channel 26 on attached plot) as the other 2 STS's. Arnaud and I went out to check the cabling at the rack, everything is tight there. We are doing measurements with the ITM's right now, so we didn't go out to check the cable on the pod.
I looked though the trends and science channels, and it looks like the auto center on the B STS was pushed at 8:30 am local on Dec 23rd, 2014 and the X channel didn't recover properly. On the first attached trend you can see that before the alleged button push (alleged because there are no logs, I'm just guessing, second trend shows what looks like an auto-centering sequence though) the X channel showed more signal, then after less signal. Y channel looks roughly the same before and after. Attached spectra (3rd png) shows overall spectra is very different, solid red is before, dashed green is after.
Yesterday I dif the ETMs. Today I did all the remainder. All came back under guardian first time.
Have added and committed HPI guardians to the h1 area so as to not by default edit the common file. All other guardian changes from this also committed.
To help with setting up SDF files, I have created lists of channels modified by the H1 guardian nodes for the month of January up to this time. We expect this to be a fairly exhaustive list as it covers the RCG2.9 upgrade on the 13th Jan when all front ends were restarted.
There is a text file per guardian node in the directory /opt/rtcds/lho/h1/data/guardian_channels/guardian_control_channels/2015jan
Attached is a list of the number of channels controlled per guardian node. As expected it is quite small. For example: SUS_ETMX has 1,717 set point channels of which 53 were changed (3%); ISI ETMX (ST1 and ST2) have 1,952 set point channels of which 124 were changed (6%).
Found that the angular control inputs of TMSY were off since Tuesday (restore issue?)
Moved the gain of the TMSY ISC P/Y input modules into a CAL filter. This makes Y the same as X.
The safe.snap was updated.
New tidal code was loaded for both arms which delays the tidal servo by 5 seconds after the arm has locked.
Also fixed the long standing problem that some of the values in the PLL/PHD autolockers were not restored automatically after a PLC restart.
J. Kissel While the BSC-ISIs were in an odd configuration anyway for obtaining sensor correction gain matching data (see LHO aLOG 16200), I took the opportunity to clean up, clean out, and fill in the ST1 and ST2 BLND_NXT filter banks with the correct, high performance, Ryan DeRosa, blend filters. Recall that the CUR (for "current") and NXT (for "next") filter banks should have the same exact filters in all filter modules, such that they can be used for the automatically switching between blend filters on the fly (see T1200126). All NXT banks for ETMX, ETMY, ITMX, ITMY, and BS now have identical filters as what's in place in the CUR banks (HAMs are already up-to-snuff). Further, I've cleared out all "Unknown", gain-of-one, filters which seemed to have been sporadically peppered in the higher numbered FMs. Finally, when transitioning back from the "Start" filters to Ryan's filters (by hand), I've left the RZ filter banks with all FMs OFF, because we don't run the RZ isolation loops. For the record, I performed the copy and paste by-hand in foton, saved filters via foton, and reloaded all coefficients simultaneously using the GDS_TP screen. Further, I've committed all affected filter files (and any other I found different from the SVN -- the HAM's .txt files because of Jim's recent improvement of the isolation loops [aLOG pending], and HAM4 and 6's .fir files, because Jim installed them Dec 2nd [aLOG "pending"]). Also -- I did not have enough time to *test* whether the newly implemented filters allow for smooth switching between the low-noise filter set and any others, but my suspicion is that it *still* won't work, given that the blend switching software cannot handle filter sets that occupy two FMs, which is the case for the RX and RY filters on ST1.
J. Kissel, A. Pele In order to gather measurement data for GND to ST1 sensor correction, I've switched all chamber's ISIs except for HAMs 4-6 to a high-frequency blend. For the HAMs this means the "750mHz" blends, and for the BSCs the "Start" filters (see attached) and turned both ISI X&Y and HEPI Z sensor correction OFF. Yesterday, worried that there still might be residual garbage from initial install in these filter banks, we've confirmed that all chambers involved have the same filters as attached. The chambers have been set up in this fashion since 1105975887 Jan 22 2015 15:31:11 UTC (We blends switched by done by 15:05 UTC and 15:22 UTC in the HAMs and BSCs, respectively, but I forgot to turn OFF the sensor correction until Arnaud reminded).
BSCs and HAMs have been restored as of: 1105980152 Jan 22 2015 16:42:16 UTC XARM Restored 1105981034 Jan 22 2015 16:56:58 UTC YARM / BS Restored 1105981219 Jan 22 2015 17:00:03 UTC HAM23 restored
model restarts logged for Wed 21/Jan/2015
2015_01_21 01:47 h1fw0
2015_01_21 13:36 h1fw1
2015_01_21 15:05 h1fw1
2015_01_21 15:29 h1fw1
2015_01_21 15:43 h1fw0
2015_01_21 17:26 h1fw1
2015_01_21 17:40 h1fw0
2015_01_21 18:43 h1fw0
2015_01_21 19:08 h1fw0
2015_01_21 19:40 h1fw0
2015_01_21 20:42 h1fw0
2015_01_21 23:03 h1fw1
2015_01_21 23:29 h1fw1
2015_01_21 23:45 h1fw0
All unexpected restarts. Inexplicably both frame writers have become unstable, starting about 24 hours after Tuesday's solaris reboots. I may try another solaris reboot today.
I've attached a trend of the h1fw0 and h1fw1 restarts for this month (h1dc0 restart is included to show intentional DAQ restarts). The instability starts 1/13 when we upgraded to RCG2.9.
Conlog frequently changing channels list attached.