Mark B. Trying Stuart's TF script adapted for undamped and damped M0 and R0 TFs on ITMy (QUADTST), from 11:25 pm.
(Doug and Jason) We had to realign the CP to the ITMy, reset CP OSEMs and OSEM centering. WE set the ITMy gap between the CP S1 and the ITM S2 to ~20.04mm gap (20mm+/- 0.25mm requirement)and pitch parallelism is less than the 1.4mrad spec, yaw is out by 3min. We will tweak the CP yaw in the AM to correct. Then we will need new TF. Jonathan Hanks replaced the memory cards in the fiber pulling machine control computer as it would not boot up (parity error). The alignment X&Y translation stages that align the fiber mounting blocks is in need of some work as they are not rigidly mounted allowing the fiber to move too much during the pulling and making the laser beam alignment more difficult. LLO needs to replace fibers that broke in transit last week. I will continue with this in the am as well.
- JoeG, ChrisM, Luke, Alberto, Cheryl Today we installed the aLigo H1 spacers under the PSL periscope. This raised it about 1". The real upper periscope mirror, glued to a PZT, is now installed. The red eye-safe laser pointer is still attached to the periscope, and was used to look at the beam as it traveled from the PSL table to HAM2. The beam is making it from the PSL to HAM2. The periscope was moved to compensate for the misalignment of the beam on the viewport aperture, and is now about 1/2 an inch from the tube at the top of the periscope mirror. Tomorrow we'll discuss other possible options for splitting the difference in misalignment. I cleaned and reinstalled the EOM into the IO path. It's as close as possible back to it's original alignment, based on landmarks I left for myself, and will need to be aligned tomorrow when we get a beam back. picture 1) IO_MB_M2 optics boxes - old 1" optic and new 2" optic. picture 2) EOM reinstalled - ALS FI had to move and lost a needed beam dump. I just talked to Keita, and the proposed solution is to move the ALS path 1" toward the reference cavity. Will discuss at tomorrow's meeting.
TYPO: GAP set to20.04mm not 20.40mm
I have spent the past three days revisiting the contro room EPICS alarm handlers with the aim of making them more usable by reducing the occurance of false alarms.
I will document the changes in the CDS wiki and give operator training.
Alarms which may or may not be valid depending upon the commissioning status can now be disabled via a new alarm manager MEDM screen (H1CDS_ALARM_MANAGER can be launched from the SITEMAP).
To prevent alarms from being disabled and forgotten about, at 8am every weekday morning a script will run which will re-enable all alarms. At that time the operator will be able to reconfigure the alarm handlers for that day's operation. When the operator is not on shift (evenings, weekends, holidays), we can mute the alarm machine's speaker if desired so as not to disturb other users in the control room. In silent mode the alarm handlers will continue to log alarms. The 8am script will also restore the speaker to the nominal volume.
WP#3554
The h1iopsush2a model was changed to allow both MC1 and MC3 to trip the local DACKILL. MEDM changes were also made to show the new configuration.
The Ham23 SEISMIC front end can only be killed by the HAM3 suspensions (MC2, PR2) and not by HAM2 suspensions (MC1,MC3).
This WP is now completed.
4th and final HAM1/HAM2 septum viewport can now be installed
Unifirst with floor mats Rick, Luke, Chris, Cheryl, Michael R., move H1 PSL periscope Michael R., turn off PSL laser to allow Robert to test chiller Kate and Margot taking pictures of HAM2 and HAM3 SUS components H2 DAQ restarts Ken to replace motor for end Y chilled water pump Apollo installing adapters and viewports on HAM2 top middle and north ports CDS subversion moved over to version 1.6 Magnitude 6.4 earthquake in the Gulf of Alaska at 20:42:15 UTC visible with seismometers Fire department working on system, set off alarm in OSB Computer Users Room
Mark B. I used DTT to take a set of undamped TFs for M0 and R0 of ITMy (connected up as QUADTST). Screenshots are attached. The graphs look pretty clean. P.S. Stuart has sent me a set of scripts that has worked recently at LLO but it needed adaptation and I wanted a quick result. I'll try it out this evening, after Jason is done.
Mark B. Here are the TFs again in the standard format with model comparisons. (I had to tweak the script to get it to recognize the file names, so I threw up a set of screenshots as a stop gap.)
The door was removed from the chamber and a garbing/staging cleanroom was designated for lower level use.
This morning all the dust monitors in the LVEA reported communication errors. After restarting the IOC failed to resolve the problem, I power cycled the Comtrol. Restarting the IOC again after this fixed the problem. The root of the problem is unclear.
Guido and I moved three optics in the IO sensing path, to make room for a possible shift in the PSL periscope. Picture attached.
This afternoon, I finished cabling MC1 and MC3 - we had stalled yesterday due to 1) broken signals on one MC1 cable as alogged earlier and 2) missing helicoils in the shared quadrapuss cable. I bypassed the nicely cabled broken SRS cable for MC1 M2/Middle and swapped in a new cable (D1000225 S1105175 180"). This restored the signals. For lack of time, I left the old SRS cable still nicely routed in it's bundle through the ISI. I'm hoping SEI will redress the cables, removing the old, lacing the new, at some later date in our HAM2 work this month - no urgency. WIth the cable issues finalized, I suspended both MC1 and CM3 and removed all of their FirstContact coverings. I enabled all watchdog and turned on the damping loops. All seems well - no tripping, at least. I left them damping when I closed the chamber, but UFl was still working across the table. MC1 and MC3 are ready for flashing.
We will set the gap/parallelism between the ITMy and CPy first thing Monday morning. This will require a brief switch to Laser Hazard for the parallelism measurement (or measurements, depending on whether or not adjustment is required). We will also take a look at the CPy roll and adjust as required. The shield was placed over the front face of the quad and the cover pulled down for the weekend; damping was left OFF for both chains.
Attached are plots of dust counts > .3 microns and > .5 microns in particles per cubic foot from approximately 6 AM to 6 PM Thursday, November 8, 2012. Also included are plots of the modes to show when dust monitor 15 in the LVEA was turned off.
HughR, MitchR, JimW Today Team SEI pushed through most of the worst of the seismic optical table payload, but we ran into a couple of known issues. LLO found that these mass stacks somewhat interfere with the BS struts. But where Livingston only had to shift a few 1kg parts around, it looks like we have to move a 5kg mass. In the attached, somewhat cryptic, picture, the mass stack directly under the strut, and closest to the camera, is missing the interfering 5kg mass. We plan on shifting this mass to a neighboring stack, but that does mean the stacks will not be as uniform as on previous units.
More work was done on the mass stacks today. I decided that shifting one of the stacks a row or two would be less likely to cause problems than adding 5kg of mass to a different stack. This allowed us to put the normal amount of weight on the problem stack, with no risk of hitting other structures. The first couple of pictures are "before"-s showing the interference in more detail. The last one shows the as-installed configuration.
I forgot to add. There was another stack that interfered with a different strut, but higher up on the stack, so only 1kg needed to be relocated there. See pic.
I recently made a new set of isolation filters level 2 for HAM3-ISI.
1- I tried them with the new Step_8_Performance_Analysis commissioning script. Spectra are attached*. The blend filters used are the new 250mHz blend filters **. There are some discrepancies between the expected isolation and the measurement. This is especially noticeable along Z. I am not sure why yet.
2 - I also tried the same configuration with the new 100mHz blend** engaged on X and Y. I compared the spectra measured then, with the ones measured earlier this week. Isolation loops show good performance. There is some amplification of motion between 10Hz and 50Hz. This is mainly noticeable along X.
* .pdf created with a new matlab script. I am still perfecting. I should be able to add it to Step_8 soon.
** svn revision 6187
I found out that one of my script mistakenly saved the Autoquack_Case Variable in the .mat Filter file causing the autoquack to always load the isolation filters, even when asked otherwise. This was corrected. All filters were re-loaded for HAM3-ISI.
I made sure the filters loaded in foton matched with the ones in the .mat filter file.
I took some quick performance measurements again today. The isolation results on Z looks way nicer now. RZ and RX are a bit suspicious but the measurements were taken in a noisy environnement.
I will be taking performance measurements on HAM3-ISI periodically over the weekend. This will alow me to get quiet-time results, and also to evaluate how consistant these results can be.
If everything goes smoothly, a long LZMP measurement will take over and finish by Monday early morning.
Attached are performance spectra taken during quiet time on Sunday.
the performance measured on RZ is still a bit off.
Note: The Y units on the first 6 pages is m/rtHz and should be nm/rtHz.
