Richard, Patrick Did essentially the same work as yesterday (https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=19310), except the gauge was connected at the end of the photodiode chassis.
Kate, Matt and a wee bit of help from Calum Omc black glass shroud is installed. More to follow ... To do list 1) balance mass 2) beam dump 3) beam diverter 4) laser beam check 5) cables. Please note should look at cable from omc bench. Dan and Matt are going to look at this in am.
So yes the order would like to do things is look at (and fix) the cable interference with black glass shroud (different solutions...will look at what we think is the best one), move the beam diverter/cabling/black glass V dump associated with this, then we can probably go laser hazard to fine tune beam diverter move and also then see if the laser goes through all the apertures in the black glass. If it doesnt I may have to reposition some of the glass pieces (there is some adjustment by design to allow this to happen). Dan and I will start in on this work again this morning. Perhaps laser hazard by lunch, maybe a little after (but dont hold me too that :-))
Then we can put back all the things that were taken off, and then balance the ISI and that should, I think, be it.
Note: Though we had 2 people verify that the EQ stops were all unlocked, now that the glass shroud is on there is no access to the EQ stops. We might want to perhaps think about doing a Transfer Function on the OMC if possible right about now. Just as a sanity check..for me, as thats what I had nightmares about last night that we somehow missed one....
Calum and Kate have lots of good pics on their camera but I will try to post some also today.
And one last thing. Its been a long hard slog by a lot of people to accomplish this. From cleaning the area prior to venting, to door removal (on Wednesday last week..just to get a time line going), to staging all the cleanrooms, cleaning the area and keeping it all fully stocked, to removing payload on the ISI for us to do the work, to people working long hours on the weekend cleaning and staging the glass, to then the three enormously long days this week pre assembling and staging everything and then installing the shroud (where we had a few problems with some parts along the way but nothing we couldnt overcome), to the people who ran looking for parts/equipment at the drop of a hat for us.........basically this couldnt have been done without a lot of help from a lot of people and it was greatly appreciated.
Now for Dan and I to finish this stuff off so we can get about closing up.
Pic........we are so happy its in....now we can sleep :-)
L. Prokhorov, J. Kissel All the quadrants of ETMX ESD work Ok. The charge level at all quadrants of ETMX is much lower after the venting and discharging procedure. See plots of today's results and Long-term* plot below. * Points for LL quadrant (red) are correct only before May and the last point. At May and June,12 we had LL ESD broken.
Sheila, Kiwamu, Jim, Dave:
It appears that following the last successful build of h1ascimc on April 21 of this year, the file was modified to use a fastPZT version of the common ASCIMC_MASTER part. This part was not found, and the model would not compile. For now I have modified h1ascimc.mdl to use the standard ASCIMC_MASTER/ASCIMC part. The common part's input ports aligned correctly, but I had to manually connect the output ports up in the order found. Someone should verify that the DAC channels are correct, they are (counting from 0 through 15)
ch08 = PZT_P_OUT
ch09 = PZT_YAW_OUT
ch10 = SPAREOUT2
ch11 = MCREFL-SHUTTER_OPEN
The output IPC parts are labeled so I'm confident they are connected correctly.
I have not installed this model, it needs checking before we do this.
Scott L. Ed P. 6/22/15 Cleaned 59 meters ending at HNW-4-086. Serviced diesel generator. 6/23/15 Cleaned 39.8 meters ending at HNW-4-088. Removed lights and cords and begin relocation to next section north. Test results posted on this A-Log. 6/24/15 Made run to town for fuel in all support vehicles and diesel tank. Filled water tank and cleaned vacuum machines. Restring cords, hang lights, vacuum support tubes, spray diluted water/bleach solution on floor. This is an exceptionally dirty section.
Jeff, Dave:
Jeff noted that the SUS ITMY SDF was reporting a difference for the HWWD STATE epics variable. This was due to the HWWD testing I did last Wednesday Link
The hardware watchdog (HWWD) is read out by the h1susitmy model via binary I/O. For a long period of time the unit was powered on but had its monitor cables disconnected. It was this state which was recorded in the safe.snap file. Last Wednesday, following the conclusion of my tests, I disconnected the input cables and then powered the unit down, which raised the SDF difference. Today I accepted the current STATE to clear the SDF difference.
Day's Activities:
R. McCarthy, J. Kissel, L. Prokhorov Richard has restored the functionality of the ETMX High Voltage ESD driver. In addition to simply turning on the high voltage, he had to disconnect and reconnect the temporary, Beckhoff binary input control cable for the "MSR" light to engage on the driver. Once the Beckhoff's binary control was restored, we were able to drive. After aligning the suspension, we briefly confirmed the functionality of the ETMX optical lever since it's health had not been check since being replaced (LHO aLOG 19290). We looked at an ambient pitch and yaw performance ASD (looked OK -- saw SUS resonances, no apparent combs, and a noise floor of sub- 1 [nrad/rtHz] above 1 [Hz]), and trending the SUM to check for glitches (I don't know what glitching does or doesn't look like, but over the past 6 hours the SUM time series does not at ALL look Gaussian). So still unclear whether the optical lever is perfect (i.e. still probably can't use it for damping), but should be good enough for now (i.e. measuring charge). Once the optical lever health was confirmed good enough, we drove a 4.7 [Hz] sine wave through each quadrant and confirmed, with a 5e4 [ct] amplitude, that ALL quadrants (even LL, which had previous been busted; LHO aLOG 19097, 19060). Looks like the replacement of the feedthrough (LHO aLOG 19221) was a success. Nice work in-vac and CDS team! Leo has begun to take charge measurements.
Richard, Patrick Richard attached a BPG402-SE Pirani/Cold Cathode combination gauge to the end X End Link Beckhoff chassis. I downloaded the device description file from the Inficon website (http://products.inficon.com/en-us/Product/Detail/BPG402-S?path=Products%2Fpg-wide-range-vacuum-gauges) and copied it into C:/TwinCAT/Io/EtherCAT/Inficon.xml on h1ecatx1. I scanned for new devices in the system manager and added it after the ALS Laser Table Relay (EP2624-0002). I updated the CoE - Online parameters to set: (800E:02) Low Trip Point Enable TP1: TRUE (800E:14) Low Trip Point Limit TP1: 1E-5 (800F:02) Low Trip Point Enable TP2: TRUE (800F:14) Low Trip Point Limit TP2: 1E-5 (F840:01) Data Units: 0x00A10000 (Set pressure reading to Torr) I stored these to non-volatile memory by writing 0x65766173 to (1010:01) Store all parameters. We tested the functionality by setting to the low trip point limit to 1E-7, verified that the high voltage tripped off, and put it back to 1E-5. I committed the change in C:/SlowControls/Scripts/Configuration/H1ECATX1/SYS/H1ECatX1.tsm to svn. I then used Daniel's GUI to copy it to the target area, activate and run it. The high voltage tripped off when it was restarted (a good thing). At some point the EPICS IOC stopped and I had to restart it. I burtrestored PLC1, PLC2 and PLC3 to 6:10 this morning.
Since some of the HEPI L4C Watchdog Monitors were non-zero, I went ahead and zeroed multiple counters. These are the counts they used to have:
wp 5305 RichardM HughR
The HEPI Pump Servos have forever been powered by bench test power supplies and these should be available for that purpose and they are expensive for use in a permanent setup. Additionally at EndX, the pressure sensors have been excessively noisy since 26 Feb, relative to the other locations and we've suspected the power supply. So Richard procured/built a supply for permanent install. We swapped it over but there was no improvement on the noise of the pressure sensors.
We tried a number of additional things. Disconnect grounds of the power supply; disconnect pressure sensors, power down the VFD of the motor Controller. No real changes. If you compare the pressures on the three servos at LHO, the EndX is way noisier so we know it can be better. Richard has some suspicion of the Servo itself now.
I have installed RCG version tag-2.9.3 on h1build and made it the default version. Any model builds from now onwards will be using 2.9.3. I performed a "make World" on all FE models, all built except for h1ascimc. I have not performed an install. There was no modification to the H1.ipc file.
There is no DAQ update for this version, it addresses SDF and guardian issues
==================================================================================================
Changes for 2.9.3 release
==================================================================================================
- Bug Fix (850): SDF changes.
- As requested for Guardian, changed skeleton.st to read filter module ramp time values before
offsets and gains.
The vacuum control workstation, control0, was rebooted due to poor performance (extremely slow). The top command showed a load average of 1.5, which should be OK for a multicore machine. After reboot, the load average dropped to 0.15. I will clean the air filters which are near totally plugged when I can find the HEPA anti-stat vacuum cleaner.
Below is the output from TJ's script for running the "PSL Check" (No Issues were posted during this check):
Laser Status:
SysStat is good
Front End power is 33.04W (should be around 30 W)
Frontend Watch is GREEN
HPO Watch is RED
PMC:
It has been locked 0.0 days, 21.0 hr 28.0 minutes (should be days/weeks)
Reflected power is 2.287Watts and PowerSum = 25.64Watts.
FSS:
It has been locked for 0.0 days 21.0 h and 28.0 min (should be days/weeks)
TPD[V] = 1.477V (min 0.9V)
ISS:
The diffracted power is around 8.16% (should be 5-9%)
Last saturation event was 0.0 days 21.0 hours and 19.0 minutes ago (should be days/weeks)
Items from meeting
Laser Safety: For any laser safety issues or Work Permit sign-offs please see John Worden (Peter King out till 7/13)
Morning Safety Meeting (Worden)
J. Kissel, for the Calibration Team Summary: As the calibration group begins to post representative, "best" sensitivities for engineering and observing runs, we must narrow down a process for deciding what is the "best" time. As such, I outline the process by which I've chosen the "best" ASD for ER7, which is formed from a 600 [sec] stretch of data starting at Jun 09 2015 14:41:44 UTC. This resulting H1 ER7 sensitivity plot (and associated ASCII dump of it), and all future official IFO sensitivity plots, will be linked from the top-level tree for sensitivity plots, found in G1500623. ----------- First, a not-so-brief recap of ER7 (and the weeks leading up to it), with calibration group goggles: For assistance, I show the sensemon inspiral range, as computed using the GDS-CALIB_STRAIN channel taken from DetChar's ER7 Summary Page, reattached here for convenience. Also from a different tab on the same page (the Segments Tab), where I get the ER7 H1:DMT-ANALYSIS_READY segment list shown below. - 2015-Apr to 2015-May Several DARM Open Loop Gain TFs are taken to estalished that the DARM Coupled Cavity Pole is stationary at 350 pm 10 [Hz] (LHO aLOGs 18186) - 2015-May-15 OMC Readout Gain Scaling between RF DARM and OMC Readout commissioned to allow for changes to IFO Power and DARM Offset while on DC readout (LHO aLOG 18470) - 2015-May-21 We finish installation of ESD low-noise, low-voltage driver (LHO aLOGs 18568 and 18579). - 2015-May-22 Suspiciously find that we have to flip the sign of digital requested ESD BIAS voltage to get the IFO to transition from EX to the new EY driver. - 2015-May-26 to 2015-May-29 - All measurements used to inform the actuation strength are taken (LHO aLOGs 18767, 18718, 18711, 18758) - All measurements used to set the sensing function's overall gain and informed the DARM loop frequency dependent uncertainty are taken (LHO aLOG 18769) - 2015-Jun-02 - Gain matching between RF DARM and OMC Readout more robust, such that OMC Readout 18768 - Frequency domain model is finished (settling on 355 [Hz] for the cavity pole frequency, though we hadn't gotten a good measure of it due to flaws in the DARM OLG TF model) and handed off to time-domain calibrators to convert to FIR filters (LHO aLOG 18769) - 2015-Jun-03 The night before / morning of ER7 Maddie restarts the GDS calibration code with newly updated filters from DARM Model (LHO aLOG 18813) - ER7 Starts, and we transfer the timeline to annotating the segment list: Segment GPS Start GPS End Duration UTC Start PDT Start Notes Number [sec] [ 0] [1117408143] [1117408494] [ 351] 'Jun 03 2015 23:08:47 UTC' 'Jun 03 2015 16:08:47 PDT' % ^ Double-counting of AA and AI filters in GDS-CALIB_Strain [ 1] [1117421174] [1117424706] [ 3532] 'Jun 04 2015 02:45:58 UTC' 'Jun 03 2015 19:45:58 PDT' % | filters (18813 and 19219) [ 2] [1117426833] [1117433922] [ 7089] 'Jun 04 2015 04:20:17 UTC' 'Jun 03 2015 21:20:17 PDT' % | exposed a bug in decimation of channel for SenseMon [ 3] [1117433927] [1117449201] [15274] 'Jun 04 2015 06:18:31 UTC' 'Jun 03 2015 23:18:31 PDT' % | calculation (see attachments 2, 3, and 4) [ 4] [1117450992] [1117457269] [ 6277] 'Jun 04 2015 11:02:56 UTC' 'Jun 04 2015 04:02:56 PDT' % | [ 5] [1117480924] [1117490420] [ 9496] 'Jun 04 2015 19:21:48 UTC' 'Jun 04 2015 12:21:48 PDT' % | [ 6] [1117493328] [1117499527] [ 6199] 'Jun 04 2015 22:48:32 UTC' 'Jun 04 2015 15:48:32 PDT' % V GDS filters are fixed after this segment [ 7] [1117507669] [1117545165] [37496] 'Jun 05 2015 02:47:33 UTC' 'Jun 04 2015 19:47:33 PDT' % --- [ 8] [1117561284] [1117562229] [ 945] 'Jun 05 2015 17:41:08 UTC' 'Jun 05 2015 10:41:08 PDT' % | Viable Calibration of GDS-CALIB_STRAIN [ 9] [1117570100] [1117592884] [22784] 'Jun 05 2015 20:08:04 UTC' 'Jun 05 2015 13:08:04 PDT' % --- [10] [1117601338] [1117665437] [64099] 'Jun 06 2015 04:48:42 UTC' 'Jun 05 2015 21:48:42 PDT' % --- IFO Configuration Changes! [11] [1117667359] [1117702258] [34899] 'Jun 06 2015 23:09:03 UTC' 'Jun 06 2015 16:09:03 PDT' % | Lots of things: [12] [1117709888] [1117743019] [33131] 'Jun 07 2015 10:57:52 UTC' 'Jun 07 2015 03:57:52 PDT' % | - IFO Input Power to 23 [W] :: Cause for Calibration Uncertainty (LHO aLOGs 18923 and 19031) [13] [1117748054] [1117773188] [25134] 'Jun 07 2015 21:33:58 UTC' 'Jun 07 2015 14:33:58 PDT' % | - ASC tuned for higher power (LHO aLOG 18923) [14] [1117803358] [1117814235] [10877] 'Jun 08 2015 12:55:42 UTC' 'Jun 08 2015 05:55:42 PDT' % | - ~300 [Hz] performance improved by changing IMC DC Alignment (LHO aLOGs 18877, 18894, 18929) [15] [1117814313] [1117815464] [ 1151] 'Jun 08 2015 15:58:17 UTC' 'Jun 08 2015 08:58:17 PDT' % | - MICH FF is retuned (LHO aLOG 18878) [16] [1117829201] [1117833161] [ 3960] 'Jun 08 2015 20:06:25 UTC' 'Jun 08 2015 13:06:25 PDT' % --- [17] [1117853451] [1117854502] [ 1051] 'Jun 09 2015 02:50:35 UTC' 'Jun 08 2015 19:50:35 PDT' % --- % Lock stretched polluted by Beam Tube Cleaning Glitches [18] [1117861010] [1117866838] [ 5828] 'Jun 09 2015 04:56:34 UTC' 'Jun 08 2015 21:56:34 PDT' % | [19] [1117868188] [1117878119] [ 9931] 'Jun 09 2015 06:56:12 UTC' 'Jun 08 2015 23:56:12 PDT' % | [20] [1117884319] [1117890432] [ 6113] 'Jun 09 2015 11:25:03 UTC' 'Jun 09 2015 04:25:03 PDT' % | Power restored to 17 [W] (though all above noise tunings remain, so sensitivity is better) [21] [1117890837] [1117891071] [ 234] 'Jun 09 2015 13:13:41 UTC' 'Jun 09 2015 06:13:41 PDT' % | Calibration Validity Returns [22] [1117891490] [1117897783] [ 6293] 'Jun 09 2015 13:24:34 UTC' 'Jun 09 2015 06:24:34 PDT' % | %%% <<< 600 [sec] OF THIS SEGMENT IS USED FOR "BEST" ER7 ASD %%% [23] [1117930374] [1117936993] [ 6619] 'Jun 10 2015 00:12:38 UTC' 'Jun 09 2015 17:12:38 PDT' % | [24] [1117937002] [1117940975] [ 3973] 'Jun 10 2015 02:03:06 UTC' 'Jun 09 2015 19:03:06 PDT' % | [25] [1117941598] [1117946873] [ 5275] 'Jun 10 2015 03:19:42 UTC' 'Jun 09 2015 20:19:42 PDT' % | [26] [1117984389] [1117987778] [ 3389] 'Jun 10 2015 15:12:53 UTC' 'Jun 10 2015 08:12:53 PDT' % | [27] [1118009073] [1118009809] [ 736] 'Jun 10 2015 22:04:17 UTC' 'Jun 10 2015 15:04:17 PDT' % | [28] [1118019595] [1118022123] [ 2528] 'Jun 11 2015 00:59:39 UTC' 'Jun 10 2015 17:59:39 PDT' % | [29] [1118038511] [1118088249] [49738] 'Jun 11 2015 06:14:55 UTC' 'Jun 10 2015 23:14:55 PDT' % --- END OF FOCUS DATA TAKING during this lock stretch, at 1118070016 (LHO aLOG 19085) % --- ESD Driver is RESET for charge testing, (LHO aLOG 19095) % | This inadvertently changes bias voltage and actuation strength (LHO aLOG 19110) % --- Reset driver's digital bias properly compensated before this lock stretch [30] [1118207683] [1118207892] [ 209] 'Jun 13 2015 05:14:27 UTC' 'Jun 12 2015 22:14:27 PDT' % --- [31] [1118212512] [1118213354] [ 842] 'Jun 13 2015 06:34:56 UTC' 'Jun 12 2015 23:34:56 PDT' % | Remaining locks have wrong and uncertain actuation strength [32] [1118268553] [1118269137] [ 584] 'Jun 13 2015 22:08:57 UTC' 'Jun 13 2015 15:08:57 PDT' % | between reality and GDS-CALIB_STRAIN [33] [1118303427] [1118329216] [25789] 'Jun 14 2015 07:50:11 UTC' 'Jun 14 2015 00:50:11 PDT' % --- ---------------- Now that I've established which lock stretches I can use that are calibrated to within the stated uncertainty of 50% in amplitude and 20 [deg] in phase (as stated in LHO aLOG 18769), which are segments viableSegments = [7:9 17:29]; I began to search for the best lock stretch. To do so, I plotted a time series of the sensemon BNS inspiral range produced from H1:GDS-CALIB_STRAIN, i.e. 'H1:DMT-SNSH_EFFECTIVE_RANGE_MPC.mean,m-trend' (SNSW is calculated from CAL-CS, which we know is in-accurate; see G1500750), and can immediately found that the sensitivity of the latter segments were better (again, because of Robert's tuning of the IMC alignment to reduce the coupling of angular jitter on the beam from the PSL, which happened during the 23 [W] segments LHO aLOG 18929), viableSegments_wGoodRange = [17:29]; This plot is shown in the first page of the attached .pdf, and was generated by the script, /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/ER7/H1/Scripts/segments_ER7.m Looking for the longest lock stretch with most consistently high range, I chose the 22nd segment, starting at 1117891490, 'Jun 09 2015 13:24:34 UTC', 'Jun 09 2015 06:24:34 PDT'. Once I had this lock stretch, I used /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/ER7/H1/Scripts/produceofficialstrainasds.m which narrows down the lock stretch into a "best" 600 seconds, where the length of the time-series, 600 [sec], is chosen because I desired a binwidth of 0.185 [Hz] and many-many averages (it works out to be 111 averages, using asd2.m), so the end-resulting ASD is nice and clean looking. Here's how I narrowed down which 600 [sec] of the 6293 [sec] long lock stretch (follow along with pg 2 of the .pdf attachment): - Zoom in on the SNSH-calculated, inspiral range time series over the entire lock stretch. (shown in blue) - Take the median of the SNSH-calculated, inspiral range time series over the entire lock stretch. The median for this lock stretch is 66.8 [Mpc] (shown as the green dotted line). I chose the median (instead of the mean) so as to not be influenced by the outlying drops in range due to glitches. - Take a rolling median equivalent to 600 sec (i.e. 10 of the 60 [sec] minute trends points), and find the rolling median which differs the least from the overall mean. (the red squares) - Set the start time of the time series to be at the time of the first point of that best rolling median. At first, I had merely selected the maximum range in the overall lock stretch (the pink point), but quickly realized that 600 [sec] of data included one of the 8 [Mpc] glitches in the time series, and wanted to avoid such things. Finally, on pages 3, 4, and 5 of the attached pdf, I show the selected, calibrated time series, and the corresponding, 111 averages, 0.185 [Hz] frequency binwidth, strain and displacement amplitude spectral densities. Note, the displacement ASD is merely the strain ASD multiplied by the exact mean arm length used in the DARM Open Loop Gain Model: mean([model.C.armLength.x model.C.armLength.y]) = 3994.4698 [m] The BNS sensemon inspiral range and horizon distance were computed by /ligo/svncommon/CalSVN/aligocalibration/trunk/Common/MatlabTools/BNS_range.m a new matlab function which uses exactly what the CBC group uses, as defined in the final S6 performance paper T1100338, and expanded in gory detail in T1500309.
In an email conversation Norna had asked what we could do to reduce motion on the HAM's in the RX/RY dofs at 25-35 hz. This morning I took a few measurements to design a FF filter. I've taken a first pass at it and I think I have something that works. Attached spectra are of the ground STS X and GS13s in RY the first png, then both sensors in X on the second plot. The live measurements are with FF on, references are from a quiet time last night, FF off.
The third attachment is a plot from the script I used to do the filter fit. Blue is the filter, green is the ideal fit from the St0 L4C's to the ISI GS13's, red is the fit from the HEPI L4C's to the ISI. The design approach is exactly the same as I talked about in my alog 18045.
I also have Y and Z feedforward working on the SRC HAMs. I attach performance plots (taken at the same time as the plots from my main post). These have been running on HAM4 for a little while (sometime after ER7 ended), but I never got around to doing the alog and I was a little more organized when I installed them on HAM5 today. First plot is Y, second is Z. Active measurement is with FF on, reference is FF off. Again, we really need a cavity to say if these are good enough, but I leave them running for now.
I've looked at X, RX and RZ, but RX and RZ show low coherence and X looks... messy, see last plot.
That was quick! Looking good. Thanks.
J. Kissel, J. Warner Some additional information and/or a "current status:" ISIs HAM2 and HAM3 do not have any ST0 / HEPI L4C feed-forward running. ISIs HAM4 and HAM5 have Y, Z, and RY ST0 L4C (not HEPI L4C) feed-forward running. (HAM6 is currently vented and the ISI and HEPI are locked.) The HAM4 and HAM5 filters, for Y, Z, and RY live in FMs 2, 3, and 4 respectively. The gain for all DOFs on both HAMs is 0.5. Norna's designing / modelling how adding blades between the HSTS's lowest stages will improve performance in the SUS's vertical displacement. The input motion for the SUS's suspension point in vertical is composed of the ISI's center of mass moving in Z, RX, and RY (see T1100617). She noticed from the results Jim posted (T1500289), that at 25-30 [Hz], the input V motion was dominated by RX / RY of the table. So, among other ways to improve the performance at these frequencies (see them discussed in SWG aLOG 11327), Jim tried improving the RY DOFs today -- and won! Nice work, as always, Jim!
There was a problem with HAM5 at the time I took this data. I've taken new measurements from HAM4, see alog 19343. Conclusions remains the same, I think, but the data is cleaner.
Calum & Kate
Finished unwrapping and inspecting all 26 panels of black glass. 100% of the parts made it in one piece and all of the coatings look good. This is great news! The panels are dusty, smudgy, and streaky; and will need to be cleaned (this was expected). The plan is to use a methanol rinse followed by drag wipping. 24/26 pieces of glass were rinsed 2x, so we're about halfway through the cleaning effort. Currently using 3 large cleanroom tables, but we'll need at least one more for prep work.
Two points of note for LLO:
1) The following parts were packaged between 2 sheets of float glass:
D1500054-101 & 102
D1500055-101 & 102
It was a good idea to protect the oddly shaped parts, but care should be taken when opening them because a couple pieces of the float (packaging) glass had chips and cracks and these were spread around the wrapping. Again these did their job and protected the black glass (which was in good shape) just a heads up.
2) Some of the parts are double packed in the bubble wrap. Again caution when opening.
All of the black glass at LLO was unwrapped today and laid out on a flow bench in the optics lab for inspection. Upon initial inspection for damage, there were no obvious chips or dings in any of the glass. The odd shaped pieces were in great shape with no abnormalities around the edges due to being sandwiched between glass for packing (the float glass was even flawless). Tomorrow we will check the coatings and begin the cleaning process. I will leave it to the inspection crew to record tomorrow but there were a few minor spot flaws in the coating on about 3 pieces.
[sus crew]
Following the in chamber work from today at end-Y we took quick TFs on the quad and the transmon. They look ok.
Since the pump won't happen before tomorrow I started matlab tfs for all DOF.
The measurement will be running for few hours.
More clue on the TMSX measurement showing a different TF than before the vent (cf log below 19246). I looked at the response from pitch and vertical drive to the individual osems (LF, RT) and it looks like something is funny with the RT osem which should have the same response as the LF one, cf light red curves below
EDIT : Actually, LF and RT osem response are superposed on the graphs (green LF lies under red RT), so their response is the same.
ETMY ant TMSY transfer functions were measured on thursday after the doors went on, with chamber at atmospheric pressure. They did not show signs of rubbing, cf the first two pdf attached showing good agreement with previous measurements.
Today, I remeasured the vertical dof, after the suspension sagged ~120um from the pressure drop, and it still looks fine, cf figures below.
ETMX and TMSX were measured today when pressure in chamber was about 3 Torrs, after the QUAD sagged by about 130um.
The second pdf attachment on the log above was supposed to show TMSY transfer functions. Attached is the correct pdf.
