IM OSEM values, zero alignment offsets, urad and counts, and IM_ALL screen, also IMC current alignment (not yet flashed)
Vent work for week of 10/02/17 to 10/06/17
There is evidence of some Beckhoff glitch that is visible. Oscillations in environmental plots are attributed to environmental controls being on for long periods of time with multiple incursions due to ongoing IO work. Chiller plots look a bit odd and have been brought to the attention of Jason O.
Amidst other in-chamber preps for next week and beyond, Travis and I were able to get into the biergarten cleanroom to separate the main and reaction lower chains of the ITMx. Both are sitting on their trolly stands. The ITM03 (old ITMx) was removed from the structure with the ergo arm and secured in it's "cake tin" fro transport back to CIT for forensics studies. We've prepped the space and equipment in prep to build the laser enclosure. Next week we'll load the new ITM07 and start setting up IAS equpiment to set the masses up for fiber welding later in the weld.
For the record, we also inspected the reaction chain top mass blade that had the wire broken off yesterday and found it to be in great shape, no visible marks and all other attachment points and clamps in proper order.
J. Kissel After SRM's surrogate optic was replaced by the real thing yesterday (see LHO aLOG 38833), it was rebalanced and leveled this morning. With it's lower stage OSEMs still completely backed off, I ran a set of health-check transfer functions to confirm that the new mass is suspended well and that the dynamics are currently free and haven't changed much from the surrogate. I'm happy to report, the transfer functions look wonderful. I attach plots of its Top to Top (M1 to M1) transfer functions by itself (with more DOFs shown in detail) and a before vs. comparison between the composite and monolithic masses for both L1 and H1. Nice work install team!! All data and changes to transfer function plotting scripts have been committed to the SusSVN: /ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/SRM/SAGM1/Data/ 2017-09-29_2216_H1SUSSRM_M1_WhiteNoise_L_0p01to50Hz.xml 2017-09-29_2216_H1SUSSRM_M1_WhiteNoise_P_0p01to50Hz.xml 2017-09-29_2216_H1SUSSRM_M1_WhiteNoise_R_0p01to50Hz.xml 2017-09-29_2216_H1SUSSRM_M1_WhiteNoise_T_0p01to50Hz.xml 2017-09-29_2216_H1SUSSRM_M1_WhiteNoise_V_0p01to50Hz.xml 2017-09-29_2216_H1SUSSRM_M1_WhiteNoise_Y_0p01to50Hz.xml /ligo/svncommon/SusSVN/sus/trunk/HSTS/Common/MatlabTools/ plotHSTS_dtttfs_M1.m /ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/SRM/SAGM1/Results/ 2017-09-29_2216_H1SUSSRM_M1_ALL_TFs.pdf 2017-09-29_2216_H1SUSSRM_M1.mat /ligo/svncommon/SusSVN/sus/trunk/HSTS/Common/MatlabTools/ plotallhsts_tfs_M1.m /ligo/svncommon/SusSVN/sus/trunk/HSTS/Common/Data/ allhstss_2017-09-29_Phase3a_H1SUSSRM_NoDamping_ALL_TFs.pdf allhstss_2017-09-29_Phase3a_H1SUSSRM_NoDamping_ALL_ZOOMED_TFs.pdf
FYI: I've left SRM in the DAMPED configuration for over the weekend.
I installed the FLIR Atlas For MATLAB IR camera interface SDK on the H1TCSFLIR computer. I've not been able to successfully use it to connect to a camera. However, so far it doesn't prevent the ResearchIR software from connecting to the camera - so that's a good start.
TITLE: 09/29 Partial Day Shift: 17:30-23:00 UTC (08:00-16:00 PST), all times posted in UTC STATE of H1: Planned Engineering LOG: Covered from 17:30 - 23:00 UTC 17:56 UTC Corey out. Keita can transition LVEA to laser hazard. 17:59 UTC Ed out. 18:09 UTC Keita done transitioning LVEA to laser hazard. 18:32 UTC Alastair starting run along X arm. 19:07 UTC Greg G. to LVEA. 19:20 UTC Cheryl, Keita, Ed, Corey: align beam in PSL enclosure to HAM2 and IO work on HAM2 and HAM3. 20:36 UTC Travis to HAM5 and HAM6 area. Rearrange cleanrooms. Radius of curvature actuator. Not in chamber. 21:28 UTC Travis done. 22:10 UTC Filiberto and Peter to mid Y to pick up power supply. 22:22 UTC Cheryl, Keita, Ed, Corey back to HAM3. 22:44 UTC Aidan to LVEA to check if the X arm CO2 thermal imaging camera is on. 22:50 UTC Aidan back. 22:59 UTC Kyle taking visitors around LVEA.
I've set Guardian to DOWN for the two TCS lasers. They can now be keyed off at the controller, and the tables can now be moved out of position for the TMDS install work.
I keyed off the TCSX laser in order to investigate potential FLIR SDK communication to thermal imaging camera.
As I reported in 38821, the valved out section of the corner station plumbing showed a curious pressure trend. And this behavior continues.
The attached plots shows 50 hours where you see the output pressure of pump station 1, the supply pressure on the main trunk line (mainsupply) and the two sensors on the distribution manifold beneath BSC2 SUP & RET.
At the start of the plot just before the start-up pressure spikes, the valving to the LVEA was changed to put the Pump Station Array into recirculation mode. This is when the BSC2 pressure sensors started their trend up. On Wednesday towards the end of the day, the pump stations were stopped but the BSC2 sensors continued their trend. Yesterday, the pump stations were restarted to continue the recirculation. One can see that the behavior of the BSC2 sensors was the same as the night before when there was no pressure at the pump stations. The PSs are again shut off now and the BSC2 sensors continue unabated. I predict this cycling will continue until the valving is changed back to the operations configuration.
FYI, all the actuators in the LVEA are valved out (or bypassed) so the entire LVEA plumbing is one big U, complicated at the bottom end with lots of branches and loops up to the BSC actuator bypass valves. While there are a few top point air bleed out ports, I believe these are all closed and not leaking.
We guess it has to do with siphoning around in the closed system but 20+ psi seems too large to be explained by the height of some of the plumbing above the pressure sensors at BSC2.
Now done with the local recirculation and will start filter changing next week.
J. Kissel H1 ISI HAM5's tuned mass dampers have been retuned to match the first bending mode of HAM ISI blade springs post spring-tip-damper install (~139 Hz). Attached are the results for all three TMDs (pg. 1: before and after tuning; pg. 2: after tuning, compared against the blades). The retuned TMDs will be installed at the earliest convenience of Jim and Hugh. Details of the measurement setup are as described in LHO aLOG 38741.
J. Kissel, for J. Warner H1 ISI HAM5 Corner 2 and 3 TMDs are re-installed. That includes re-installing all walls associated with Corners 2 and 3. The only ISI damping mechanism work that remain on ISI HAM5 are re-installing the TMD for the corner 1 blade, and installing the GS-13 Can Damper on the H3 can. First image is Corner 2's re-installed TMD placement, and Second image is Corner 3's.
J. Kissel, for S. Cooper and J. Warner Corner 1 TMD was re-installed today, 2017-10-02.
I modeled how the Gouy phase of the SRC and mode-matching of the H1-IFO to OMC might change if we change the position of SR2 (to increase or decrease the SR2-SR3 length and SR2-SRM length). The results are summarized in the attached two PDFs (the same nominal parameters are used in both but in one of them I've turned off the uncertainties in the SRC and ARM elements).
The bottom line is, to increase the SRC Gouy Phase from 18 degrees to 23 degrees, we need to either:
Note: these PDFs are auto-generated.
Used the mirrors on the PSL room to center the beam on two irises in HAM2 (for MC1) and HAM3 (for MC2) defining the MC1-MC2 beam axis inside the MC.
Then we placed a second iris on HAM3 that was centered on the beam, so there are two irises on HAM3 that is centered on MC1-MC2 beam axis. According to Cheryl the iris for the MC2 beam position could be off in YAW by less than a mm or so (totally inconsequential in the end) , but it should be pretty accurate in PIT.
We used a red laser pointer and two steering mirrors to inject red beam that is coaxial with MC1-MC2 beam line. The laser pointer was mounted on top of a class A breadboard and attached to the edge of the ISI (we sacrificed a spare QPD sled breadboard for this).
We looked at the transmission of the MC2 on MC2 TRANS QPD and found that the beam was very low. It was also off in YAW but note the caveat about the YAW beam position above.
We centered the beam on QPD, rotated the QPD in YAW so that the reflection is correctly sent to the beam dump.
I and Corey removed the red laser pointer setup and two steering mirrors from HAM3.
LVEA is transitioned to laser hazard.
PSL is in commissioning mode (it's been like that for days), the PSL room light is ON but ante room light is OFF.
Tomorrow we'll bypass the MC beam.
This afternoon, Travis and I finished the necessary part removal to drop the Lower structure and it's 6 masses from the ITMx suspension in BSC3. Mark D helped us run the arm and the elevator controls to bring the unit out. We had one small hiccup where we accidentally yanked a wire off the reaction chain top mass which was snagged on UIM hardware. We'll have reinspect the this top mass and then hit the lab to rebuild the wire segment. Win one for poor lighting, not have an infinite supply of eyeballs and snaggletooth UIM structure hardware sticking up during this procedure. Thanks in advance for Jeff K's pictures likely coming to the alog.
In other news:
Jeff B and I were able to successfully* swap the SRM surrogate mass for the full SRM optic SRM-06. I first contacted the HR surface prior to installing it. We measured weights prior to install:
SRM-06 2885g (2886g with the FC sheet)
Surrogate 2905g
Jeff added 20g to the middle mass in order to compensate for the loss of weight to the SRM optic stage. Jeff and Hugh are currently working on setting pitch and roll.
*Successfully: the optic was not damaged, the wires of the suspension were not broken, the optical lever we were attempting to use was only mostly compromised. While trying to sight the far side wires around the prisms during the install, I rolled a shoulder into the temp oplev beam staged on the table - even though it was placed as far out of the way as possible. Darn cramped spaces! Oh well, the pitch info from it is still useful and we have other ways to course align P/Y. Final alignment will happen early NOV with PSL beam.
IO has continued efforts in HAM2/3, still at it now...
Hugh finish install of needed feedthrus on HAM5.
Pictures from yesterday's ITMX De-Install. I attach a few of the highlights in their raw form, but the majority of the pictures are attached as .pdfs for a sequential stories and focus areas.
In order to make it very easy to make a dated backup of a file before it is changed, I have created a script called makebackup. It takes one argument, the file name to be backed up. It either creates the backup file in the current directory, or in a sub directory called archive if that directory exists.
Here is an example of its use (ran at 12:23:40 PDT on 28 Sep 2017):
makebackup H1.ipc
file H1.ipc backed up as archive/H1.ipc_20170928_162340
TITLE: 09/28 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: ITMX has been removed. HAM2/3 work continues.
LOG:
