Attached are plots of dust counts requested from 5 PM June 20 to 5 PM June 21.
Attached are plots of dust counts requested from 5 PM June 19 to 5 PM June 20.
The calibration of the green ALS PD in transmission of the arm cavity and located on ISCT1 have been remeasured. The responsitivity of the PD was changed to 0.22 A/W (from 0.755 A/W); a factor of 3.4 decrease. The beamsplitter ratio was measured to be 19% (from a theoretical 20%). The datasheet of the SM1PD1A indicated around 0.23 A/W at 532 nm.
Bosch 0130002090 - discontinued and out of stock so I am researching a similar product Motor Specs: Permanent Magnet Torque - 1.85 Ncm Unloaded 2850 RPM at 12vdc stock, 5.5W (current config Loaded: 1760 RPM - 8.55 vdc at 3.55 A) Mounting - 2x 4mm on 46.5BC 2 bolt oval plate shaft dia 5mm x 22.5mm
08:00 Laser Safe Alarms: CDS and Dust DR #1 Pablo in H2-PSL working on PCAL Filiberto pulling cables at End-X Western States delivered new scissor lift John W working at End-Y Pablo out of H2-PSL Jim and Cyrus at Mid-X working on fiber Pablo in H2-PSL working on PCAL Richard working in LVEA around dust monitor 4 Virginio taking equipment to End-X
YBM turbo valved in for 6 hours today -> Started @ 9 x 10-7 torr*L/sec, ended @ 6.5 x 10-7 torr*L/sec
(Corey, Keita, Lisa, Matt, Virginio)
ISC Table Layout Has Begun
I roughly laid out the QPD Sleds, High Power Beam Dump, & Beam Diverter. Matt & Lisa started laying out all the rest of the optics (which required brining all the hardware from the Corner Station and then building each component, and then laying it out.) Most of the optics are now on the Table. Matt & Lisa will finish off laying them out and then begin aligning everything next week.
Telescope: Staging & Tooling
Virginio & I unwrapped Tooling for suspending the Telescope. Virginio is staging to start using our alignment laser.
Continuing To ICS
Continue to start making Assy Loads and accounting for all parts used for this installation.
EX TMS Weather
Relative Humidity started at 30% in the morning and went to 35% in the afternoon. We will receive desicant packs and hygrometers on Mon/Tues.
TMS Mock Feedthru
Helped Filiberto connect the "roof-side" (vs. lab-side) cables to this Feedthru on Fri as well. We only installed 4 (of 5) cables (5th cable had a bad connector).
Following the installation of timing, networking and ipc in EX, we booted the h1susauxex front end computer and started the IOP model. This caused mx-stream DAQ errors from many other front ends, including all at EY and on the LVEA test stand. Restarting the mx streamers on these front ends did not clear the problem. When h1susauxex was powered down (thereby killing the mx streaming) all the other front ends became good again with intervention needed.
We will keep EX powered down for this weekend and revisit this problem Monday or Tuesday next week.
You may be encountering problems when manually starting models See this wiki page https://awiki.ligo-wa.caltech.edu/aLIGO/FrontEndStart You will see that the old scripts start_streamers.sh and start_iop_mx_stream.sh still use a single port MX stream. As described, modifying start_streamers.sh is easy (merely stop/start /etc/init.d/mx_stream). Discard start_iop_mx_stream.sh. * I have tested the new startup scheme described there on the LLO DAQ test stand, but have not attempted in on L1. The RCG 2.7 roll-out would be a good chance to do that.
Also make sure that the /diskless/root/etc/rtsystab file has been updated with a line for the new computer and IOP model. Several startup scripts depend on it. In particular /etc/init.d/mx_stream uses it to figure out the MX stream card and slot.
There was a configuration error on the EX DAQ switch on two ports, including the one for h1susauxex (h1seiex being the other). It was missing the mtu setting to allow transmission of jumbo frames (the dainbramaged CLI pagination code in these switches makes this hard to see, even when expressly looking for it...). This has been corrected, and I suspect it will work now barring any other problems, but this is yet to be tested.
Changed out the 9 pin cable that connects this dust monitor to the 485 loop in the hopes of reducing data problems. The cable that was connected was twice as long and may have had too much voltage drop to properly power the dust monitor when the motor was running.
The End-X network switches for front-end and daq traffic have been connected, allowing the front end computers for the end-x to be started when needed. The RFM switch has also been connected between the corner and end-x.
Network reconfiguration is complete, h1pemmx has been restarted. As a bonus, the timing master to timing slave issue has been solved, so the timing is no longer out of sync.
HAM HEPIs 4 and 5 were brought into run mode yesterday, June 20th.
current HEPI Status:
| Bleed Mode | Run Mode |
| HAM 2 | BSC 1 |
| HAM 3 | BSC 2 |
| BSC 9 | BSC 3 |
| BSC 6 | |
| HAM 1 | |
| HAM 4 | |
| HAM 5 | |
| HAM 6 |
HAM 2 is now on the run list.
HAM 3 is now in run mode as well.
[Alexa, Chris, Matt, Kiwamu]
Currently our focus is on two main tasks : refinement of Alexa's control model and the CARM control with the PFD (Phase Frequency Discriminator).
Yesterday we did the following items :
As a result the UGF of the end PDH loop became 9.7 kHz with a phase margin of 50 deg. Probably we could go higher but we can't go higher than 17 kHz where the phase margin turns in zero.
[Kiwamu, Alexa, Matt]
Attached are the transfer functions Kiwamu refered to. The attachment are in the following order:
1) Current picture of the ALS model used for comparison of the transfer functions taken
2) Image of measure transfer function of End Y PLL Loop
3) Transfer function of End Y PLL Loop from ALS model
4) Image of measured transfer function of End Y PDH Loop
5) Transfer function of End Y PDH Loop from ALS model
(Corey, Virginio)
Continue to build up the Telescope and In-Vac ISC Table assemblies.
Spent time contemplating how to make TMS Assy Loads in ICS.
Topic of humidity came up in the Weekly TMS Meeting came up yesterday---namely the negative effects of humidity on Optic coatings. We have a Dust Monitor in the Lab, but it isn't "online". (For a "first Humidity data point", had a humidity of 21% mid-afternoon time yesterday) In the future, we'll be receiving desicant packs from CIT and will make "Ameristat bags/covers" for our assys with optics and place desicant within these "bags".
Lisa has completed cleaning of all 2" optics which go on the In-Vac Table. We will gather opto-mechanical hardware for these optics & then transport this to EX.
Continue to add photos of progress here.
Actually, want to nullify that "first data point". I assumed the Dust Monitor was constantly running, but it wasn't. Once Virginio Started it, this is when we saw humidity levels around ~40%. Now it's worth noting we have had some rare summer rainstorms for the last few days.
