Jeff B
@ 10:00 BSC2 HEPI & ISI Tripped. Reset watchdogs and both have recovered.
Jeff B
@ 10:02 the BCS1 SUS, HEPI, and ISI Watchdogs tripped. Reser watchdogs and all systems have recovered.
I closed these late yesterday but then turned them off again over night. I've collected overnight spectra now and have re-closed the loops. I'll make comparisons with the HEPI L4Cs and the ISI T240s for evidence of minimal harm from the loops. Attached is the comparison--I'll examine it closer too but I think there are elevated areas with the loops on between 0.7 and 10hz. Maybe we can live with this or tune this out.
Adjusted fan 1 output to 12000 SCFM, this also corresponds to the fan output at X end. This request was to see if we could reduce a noise peak that showed up in Jim Warner's test spectra.
model restarts logged for Mon 07/Apr/2014
none reported by the software, but...
looks like I've got a bug in the reporting software, we rebooted the h1seih45 computer and the models started up automatically. Somehow this method of startup was not logged, here are the restarts entered manually:
Mon Apr 7 11:51:26 2014
h1iopseih45
h1hpiham4
h1hpiham5
h1isiham4
h1isiham5
Here is the list of commissioning task for the next 7-14 days:
Green team:
Red team:
Blue team (ALS WFS):
Blue team (ISCTEY):
SEI/SUS team:
Since Saturday the ODC for the PSL and (obviously) IMC have looked a little odd. They both keeping reporting very short, quick times when both the systems are not 'good'. These happen throughout the day as you can see by the two attached plots which show yesterday's activities (you can see more of these plots on the summary pages - https://ldas-jobs.ligo-wa.caltech.edu/~detchar/summary/). Just wanted to check you knew about this and if so is this nothing to worry about? Thanks!
This was another iteration of the ISS actuation running into its range limit.
Sheila, Chris, Alexa, Stefan
This morning we looked for coherences with many signals with our COMM noise. There weren't any surprises, we see the same coherence with the end station PDH control signal around 1kHz that we are used to, ISCT1 accelerometers around 70-100Hz, and a little coherence (-0.7-0.9) with the oplevs at low frequencies (pitch at 0.5Hz, yaw around 0.1). We don't see much coherence at all with the TMS QPDs, just a small bit at low frequencies. We lose coherence with the in loop sensor below around 100Hz.
Chris and I went out to End X to look into the beam quality problems. We didn't find much that was promising. We checked rather carefully for clipping on the way into the chamber again. We also set up the nanoscan again, and we see that there really isn't anything coming back to the WFS when the ITM and the ETM are both misaligned (so it isn't a second beam that is directly reflecting a lens or some optic on transmon.)
We also tried Daniel's suggestion of closing down an iris in the path. For WFS B this only made things worse. WFS A scans will be attached to this alog soon, but we didn't get any improvement there either.
We came back and tried out some of Rich's blends. We were able to get relatively low noise once without using WFS, 30z down to 0.02 Hz. The attached plot shows the COMM noise (measured by the IR) with different blends on. We are curently seeing a lot of noise on ETMX T240s at around 3Hz, (100 times more) Rich is looking into this.
Optic is Newport 20B20NC.1 which has a 30min wedge. Since this is in a double path configuration it was not clear which orientation is the best, but I put it in such a way that the beam and the ghost beam going to the chamber separate immediately. OTOH this means that, for the return beam in HWS, PDH and WFS path, the main beam and the ghost crosses at a point 7" after the BS, and then separate. This is because it's easier to block the ghost beam(s) in HWS, PDH and WFS paths than at the back of the periscope.
After the installation of the BS, I used two irises downstream of the 2" PZT mirror to move the 2" PZT mirror position as well as the angle to recover the in-vac QPDs. I further adjusted the 2" PZT mirror and the corner steering mirror between the 1" lens and the 1" PZT mirror to center the beam horizontally on the 2" lens without losing the beam on QPDs.
The optic and the mirror holder were supplied by AOS, had to use lab stock for the post and the base plate.
This is Sheila, logged in as stefan Switching blends to test some of Rich's new filter's etmx tripped. Apparently according to rich this is a know problem, that the filters are incorrectly switched on a zero crossing instead of ramped. Guardian has recovered without a hitch.
Hard closed GV11 (Bad, abnormal, "clank" from cam mechanism a few seconds before motor stopped) -> portable RGA assembly is valved into Y2 beam tube -> avoid this apparatus (at Y-mid on elevated slab near GV12)
Took over for Justin/Pablo at about 2pm to cover the remainder of the shift. The only new activities I can add are the following:
PT410B seems to have responded, i.e. there looks to be some pressure "communication" via an inner O-ring (perhaps)
Scotty, Mitchell, The Stage 2 midplate was torqued, inner hex walls added and torqued. The stage 1 Close out plate was added and torqued, the stage 1 close out plate cover was added. No hardware has been added, as there are 405 shcs's and the temp in the cleanroom was 85 which became a good stopping point.
Aaron put a dongle into the T240 ground monitor electronics to put it into high gain mode, I've updated the caibration filters so we should now be getting calibrated ground spectrum
***_STSINF_B_(X,Y,Z)_OUT
TCS work ongoing in the corner station, mostly along X-arm today
0845 - LVEA transitioned to laser SAFE
1000 - Jodi staging equipment to be removed from LVEA, accessing exterior airlock located in South Bay area. Then Jodi to MY.
1005 - Corey to EX TMS lab for part hunt
1030-115 Beamtube cleaning along X1 by JoeD, ChrisS, ChristinaC (doors left open)
1100 - Jeff/Richard inspecting dust monitor vacuum lines in LVEA
1150 - Dave restarting H1IOPSEIH45
1245 - Karen to EY---advised to tread lightly near BSC10 (Jim working on iso loops)
1250 - LVEA transitioned laser HAZARD
1313 - TCS energizing CO2 laser on TCSX
1315 - Travis on parts hunt LVEA test stand
1400 - OPS handoff to Pablo
will run for ~ 16 hours (undamped / damped for main and reaction chain)
FInished when checked 4/7 (Arnaud is away).
M0 undamped: 2014-04-02-1080519986_H1SUSETMY_M0_0p01to50Hz_tf.mat
M0 damped: 2014-04-02-1080537980_H1SUSETMY_M0_0p01to50Hz_tf.mat
R0 undamped: 2014-04-03-1080555846_H1SUSETMY_R0_0p01to50Hz_tf.mat
R0 damped: 2014-04-03-1080573824_H1SUSETMY_R0_0p01to50Hz_tf.mat
Everything looks good except that as usual the R0 cabling has pushed the pitch modes up in frequency.
Comparison plots pending.
For further record, it's actually HEPI-HAM3
Mark B. Resuming work on BSFM02. Will take damped and undamped TFs and damped and undamped spectra.
Mark B. Done for the day. Undamped TF data is 2012-09-26_1900_X1SUSBSFM02_M1_*_WhiteNoise.xml, and damped TF data is 2012-09-26_2000_X1SUSBSFM02_M1_*_WhiteNoise.xml . Plots for these data set are appended. I've added the appropriate lines to plotallbsfm_tfs.m and committed it but I haven't run it - I want to check that it does the right thing with data taken on H2 but filed as X1. Spectra time segment starts are startTimeRef.gps = 1032753893; % GPS Start Time Damping OFF startTimeRes.gps = 1032752625; % GPS Start Time Damping ON I still need to generate plots for these and the ones earlier today, but as mentioned previously, first I have to modify plotbsfm_spectraBSFM02.m to accept X1 data (the script it's based on was hard-wired to L1/H1/H2).
Mark B. Here the comparison plot with all the BSFM02 data plus some for the real H2 FMY and X2 BSFM06. The noise in the BSFM02 data sets is rather worse than X2 BSFM06 (but comparable to H2 FMY), so it looks like we don't have the best drive parameters. However it does look like noise and there don't seem to be any significant features common to the noisy bits of 2012-09-25_1100 and 2012-09-26_0900.
Mark B. After some discussion with Stuart, I processed the spectrum data from 7/26/12 morning and evening two ways. First I used a custom plotbsfm_spectraBSFM02.m to process it as X1/BSFM02/BUILD01 with tags of 2012-09-26_0900 (morning) and 2012-09-26_1900 (evening) with names like ^/trunk/BSFM/X1/BSFM02/BUILD01/SAGM*/Results/2012-09-26_*900_X1SUSBSFM02BUILD01H2:SUS-FMY_*.pdf So if anyone is looking for the data by following the directory structure in the usual fashion for a Phase 1b test, appropriate plots will be there. The captions in these plots also specify X1 BSFM02 primarily and H2 FMY secondarily. We also used the stock plotbsfm_spectra.m to process the data purely as H2:FMy with names like ^trunk/BSFM/H2/FMY/SAGM*/Results/2012-09-26_1900_H2SUSFMY_*.pdf This is so that it can be found by the stock version of plotallbsfm_spectra.m, which Stuart felt was too much hassle to customize. We added two new lines to the measList section with comments to the effect that the suspension in each case was really BSFM02. Attached is a set of comparison plots with the morning and afternoon's data. Unfortunately we couldn't include the 'L1','BS','2012-09-24_1200' dataset because it doesn't seem to have been committed from LLO.
In preparation for the Acceptance review, I redid the TF plots with up-to-date comparisons.
Red: 3IFO Phase 1b undamped (2012-09-26_1900)
Pink: 3IFO Phase 1b damped (2012-09-26_2000)
Black: H1 BS Phase 3b undamped (2013-07-30_1059269030)
Orange: L1 BS Phase 3b undamped (2013-08-29_0900)
Because the data was taken on a mechanical test stand in the LVEA with other work going on around, it is somewhat noisy (especially up to about 0.6 Hz in most DOFs and throughout in P) and the damping is a bit strong, but the peaks in the undamped TFs are very clean and in exactly the right positions.
I also redid the spectra with comparisons.
Green: 3IFO BS 2012-09-26_0900
Red: 3IFO BS 2012-09-26_1900 (later the same day)
Cyan: H1 BS 2013-02-25_1000 (on BSTST test stand)
Purple: H1 BS 2013-07-24_1400
Blue: L1 BS 2013-11-27_0930
