RGA is baking overnight -> The 1.5" gauge pair pump port valve is closed as well as the 10" gate valve -> Leaving PT346B off while unpumped (i.e. while the 10" gate valve and 1.5" valves are closed)
On the BSC-ISIs, things have been running differently at LHO and LLO for quite a while.
I took a look at a random chamber (ITMY) for both sites to see how we can make the best out of both configurations.
LLO ITMY Status:
Stage 1
- X, Y: 45mHz blend, FeedForward from HEPI, Sensor Correction
- Z: 90mHz blend, FeedForward from HEPI, Sensor Correction
- RX, RY: 250 mHz blend
- RZ: 200mHz blend
Stage 2
- X, Y: 250mHz Blend
- Z, RX, RY, RZ: Damping only
LHO ITMY Status:
Stage 1
- X, Y, Z: 45mHz blend
- Z: 90mHz blend
- RX, RY, RZ: 250 mHz blend
Stage 2
- All DOFs: 750mHz Blend
As we can see, the main difference is on Stage 2: most of the DOFs are turned off (damping only) at LLO. On the other hand, they have more features (FeedForward, Sensor Correction) installed on ST1 then at LHO.
By looking at the results, we see pretty similar results in X and Y. LLO seems to do a little better at 0.5Hz (better blend design, sensor correction). But, by looking at the rotational degrees of freedom, we can see that having a high blend on ST2 at LHO doesn't affect the low frequencies and help a little around 1Hz (we see that also in the optical lever).
In conclusion, turning on the sensor correction at LHO seems to be the next step. At LLO, it seems that turning ON the stage 2 loops with high blend filters wouldn't hurt.
Sebastien - it's great to see this kind of comparison and combining of the benefits of both sites - thank you!
The y-axis units on the optical lever plot - it's in radians, I assume?
Peter- Yes! Sorry about the confusion, I did all those plots with the same template without seeing my mistake (same thing goes for the rotational degrees of freedom on the other plots)
The commissioners have been complaining about too much motion in Yaw on the BS (almost 2microns peak to peak at 10 mHz (!!)).
We know we have some pick up between Z and RZ (see the various SEI logs from the last 6 months), so I switched from a ~100mHz blend in Z to a 750mHz. Relaxing the actuation in Z reduced the pick up seen in RZ.
I was afraid to degrade pitch with this change, but we improved yaw by a factor of ~5 without changing the pitch integrated RMS (it introduced a peak around 1Hz though).
I've tried to implement a 250mHz blend, but no improvement...
Thus, the configuration that seems to satisfy the commissioners is:
- Tbetter: X, Y, RX, RY
-Tcrappy: RZ
- T750: Z
I'll check what is the status of this "pick up" on the other chambers ASAP.
Yes, this was certainly better for PRMI stability.
We now need to work some more on the angular stability of the other loops. Peeking over Kiwamu's shoulder, I see that the RMS of the other DRMI mirrors is ~0.1 urad (for 0.01 < f < 0.5 Hz). We should tailor the ISI and HEPI loops to move this RMS down to lower frequencies (0.01-0.1 Hz) so that the WFS loops can handle it.
I think that this is the configuration that we want for now, one comment is that it would be worth plotting the oplev signals only up to 19Hz (or 10Hz or whatever frequency it is that cuts off that ugly peak), the 29Hz peak is room fans, I'm guessing that the 19Hz peak is an oplev pier resonance, then we could get an RMS that better represents the optic motion.
TACQ driver S1100025 was replaced with newly modded (L1200226-v2) S1000356 as SRM M3.
J. Kissel, E. Merilh I had Ed export his test results for one channel for this chassis from directly from the SR785 onto a floppy disk. I then plotted the results and compared against the model we have of this modified driver, which we use to design the compensation filters. See attached. The message -- the driver modifications for this particular channel look great. By comparing the results of the channels in the usual aLIGO CDS way (comparing the magnitude and phase values at certain frequencies against previous measurements recorded in the same way), the rest of the channels check out too. I've stuck the raw data, and the script that's used to plot it in the suspensions SVN repo, /ligo/svncommon/SusSVN/sus/trunk/electronicstesting/coildrvtf/lho/Triple_Acq/S1000356/*.TXT, and /ligo/svncommon/SusSVN/sus/trunk/electronicstesting/coildrvtf/lho/Triple_Acq/S1000356/plot_S1000356_tfs.m As a part of the standard aLIGO procedure, I've also - updated the e-traveler, indicating that is has been modified, and then subsequently installed as H1 SUS SRM M3. - attached the same .pdf I attach here to the corresponding DCC document, S1000356 (now at v5). (If not this, then at least the new test report should be attached.) - updated the DCC filecard for the H1-SUS-C7 rack, S1301874, to replace S1100025 with S1000356. This now completes all hardware modifications needed for ECR E1400369, Integration Issue 936, and work permit 4850.
Swapped out Top acquistion coil drivers in PR2, SR2 Old New S1100020 S1100040 S1100009 S1100028 S1100032 S1100012 S1100052 S1100003 Waiting on tests to finish to replace SRM.
This closes work permit 4852: Fixed bug in get_last_keep_alive when no keep alive was recorded in the database. Updated exception handling and argument parsing. Does not affect the database or server.
The H3 ~6hz zero didn't soften as much as on HAM4 but it is smaller. See attached for the comparison the HAM5 ISI L2L TF with 5hz vs 2hz ugf HEPI Pos Loops.
9:45 am, Aaron to the CS VEA, replacement of coil drivers per WP#4850
10:02 am, Peter K to CS VEA, work inside H2 lser enclosure.<-- Done
10:48 am, Travis to CS VEA, West bay area, work at the test stand.<--- Done
11:55 am, Karen to Y-End station, driving over to drop off bottled water.<---Done
1:03 pm, Alexa and Jeff, control room, software changes to new drivers on WP#4850.
1:26 pm, Travis to CS VEA, West bay area, test stand work.
1:36 pm, Betsy to CS VEA, West bay area, test stand work.
2:30 pm, Patrick from control room, update conlog per WP#4852.<---Done
3:44 pm, Dan to CS VEA, HAM6 area to break and fix some stuff.
4:00 pm, Andres to CS VEA, West bay area, retrive information. Door are locked.
Nothing special as these are generic Lvl1 controllers. They work. The attached pdf shows all the details of all controllers.
There are a few high frequency (~400hz) peaks in the simulated Open Loop that intrude into our -20dB space on a couple dofs, mainly X. If there is any ringing, these controllers may need to diverge from generic.
The Previous Lvl1 controllers are still loaded in the Lvl 2 & 3 Fake Banks, so we can return to these if you suspect these controllers.
I added a ROBUST_ISOLATED to the Guardian ISI_HAM4 to use the new Lvl1 controllers. The SEI Manager is paused. HPI & ISI are executing
The Output Sym filters are the only thing we can't revert as I refit the new TFs for these.
The controllers shown above use the 01_28 Blends,...even though the filters that somebody switched this platform to are the 250mHz blends.
Alastair, Greg, Patrick Alastair tried to use the TCSX rotation stage to change the power this morning. Nothing on the medm screen seemed to indicate that anything was happening. When I request a search for home, the 'Actual Cmd Position', 'Actual Velocity' and 'Drive Time (ms)' change on the 'Rotation Stage Readback' medm, but the 'Counter Actual Angle' does not.
Vern checked and says that there is no interlock plug installed.
The interlock bypass plug has appeared to fix the issue. We're not sure where what was in there before, or where it had gone, but thanks to Vern we have a good solution in place. Fingers crossed this solves the issues.
Here are the new interlock bypass caps that Vern rigged up for us. Seems to have solved the issues with the rotation stage as no more errors popped up while doing the projection work.
Alastair Heptonstall, Greg Grabeel The TCS ITMx CO2 laser projection has been completed with the updated layout. The first projection showed an off center profile but after some adjustment we got a much better looking projection. The mirror 1 step upstream of the mask was used to make adjustments to the profile.
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A. Sevingy, J. Kissel, A. Staley Continuing with the installation of modified triple acquisition drivers into all lower stages of Recycling Cavity HSTSs, as per ECR E1400369, Integration Issue 936, and work permit 4850. Aaron will post serial numbers when the final install of SRM is complete, however, anxious to use the new drivers, Alexa and I followed yesterday's procedure (see LHO aLOG 13958, we started at Step 2) to make the necessary software changes to support the new drivers on H1SUSPR2 and H1SUSSR2. The only difference was that, unlike PRM, the "twos" needed BOTH stages of COILOUTF filters modified, since they did not have a prior modified driver installed in M2. new safe.snaps, filter files, and top-level models have been committed to the userapps repo. As with yesterday's changes, no DAQ restart was required.
Same has been done for SRM now.
J. Kissel, A. Staley After the L1200226 Modified TACQ Driver LHO aLOG 13956 on the M3 stage of H1 SUS PRM was installed (as a start of the proposal outlined in G1401125), I was quickly reminded that one needs to change the COILOUTF compensation filters *and* the BIO/switching logic in the front end code in order to support the new driver. Thankfully, since we already have the materials we need from when we increased the M2 stages (see E1200931), the process was pretty darn quick. The repercussion is that we now have *another* HSTS library part, called "RC_MASTER.mdl," with the changes outlined in LLO aLOG 4237, except done for M3, and PRM is currently using this new library part. Compensation filters have been updated, and the switchable logic follows the expected behavior. All models, new library parts, and filter files have been committed to the userapps repo. Detailed log of activity. (Start at Step 2 for future HSTS installations that have both M2 and M3 modified). (1) Created new HSTS library part called "RC_MASTER.mdl" (RC is for "Recycling Cavity") - cd /opt/rtcds/userapps/release/sus/common/models/ - cp MC_MASTER.mdl RC_MASTER.mdl - open new library part in matlab - Copy the TACQ_M2_BIO_MASTER" L1200226 modified coil driver logic block from M2 to M3 in the first level's "BIO" block, and rename to "M3". The only difference between these two blocks is the function call to CD_STATE_MACHINE, where it calls the inner function "TACQ_M2" instead of "TACQ," which you can only see if you right-click "Properties..." and look at the description line. - At the top level, change the name of the block from "MC_MASTER" to "RC_MASTER" - Right-click, "Properties..." > change Description from MC MASTER to RC MASTER - Save - svn add - svn commit -m "New library part to support an HSTS with both lower stage coil drivers modified as per L1200226." RC_MASTER.mdl - svn propset svn:keywords 'Id' RC_MASTER.mdl - svn commit -m "Set Id property." RC_MASTER.mdl - svn propset svn:keywords 'HeadURL' RC_MASTER.mdl - svn commit -m "Set HeadURL property." RC_MASTER.mdl (2) Switch h1susprm model to use RC_MASTER.mdl library part - open h1susprm.mdl in matlab - delete main library block (was an MC_MASTER.mdl) - copy in RC_MASTER.mdl from library part - reconnect all top-level connections (there's no new inputs or outputs, so all connections should be identical) - Change name of block from "RC_MASTER" to "PRM" - Save - svn commit -m "Switched main library part to use RC_MASTER.mdl to support installation of modified TACQ drivers, now on M2 and M3." /opt/rtcds/userapps/release/sus/h1/models/h1susprm.mdl (3) Capture, Recompile, Reinstall, Restart, and Restore - open PRM guardian - Note in what state PRM is currently (MANAGED to be MISALIGNED) - Change PRM Guardian mode to EXEC (normally in MANAGED) - Change state request to SAFE, wait for it to finish - cd /opt/rtcds/userapps/release/sus/h1/burtfiles/ - makeSafeBackup sus h1susprm - svn commit -m "Captured latest EPICs values, just in case." h1susprm_safe.snap - ssh controls@h1build - cdsCode (same as cd /opt/rtcds/lho/h1/release/) - make h1susprm - make install-h1susprm - open prm's GDS_TP screen, keep your hand on the "BURT" button - ssh controls@h1sush2a - starth1susprm - hit BURT button, once EPICs values start to return - Go back to Guardian, change state request back to "MISALIGNED" - Change Guardian state back to MANAGED (4) Change M3 compensation filters to match the frequency response of the modified TACQ driver - cd /opt/rtcds/userapps/release/sus/h1/filterfiles/ - open foton, navigate to H1SUSPRM.txt - Uncheck "read only" from "File..." toolbar menu - Navigate to one of the M2 coil compensation filter banks, e.g. PRM_M2_COILOUTF_LL, switch to "multiple" filter mode - copy all four filter banks, FM1, FM2, FM6, FM7 - Navigate to each of the M3 coil compensation filter banks, i.e. PRM_M3_COILOUTF_[UL, LL, UR, LR] - Paste FM1, FM2, FM6, FM7 - Change the ends of the name from "M2" to "M3" - Select FM3 and FM8, and cut them to clear them - Once complete, Save - Go to GDS_TP screen, and load coefficients - Confirm properly loaded by going to M3 COILOUTF screen, right click, "Execute > Foton (Pick Filter PV)" - Compare with M2, to be sure they're the same - svn commit -m "Changed M3 coil driver compensation filters to account for new L1200226 modified driver." (5) Confirm compensation filter switching logic works as expected - Open Binary IO control screen, switch between states 1 through 4, make sure it matches the behavior of T1100507.
