Due to recurrent crashes of h2susb78, the connection between the FMY watchdogs and the ISI watchdogs is temporary bypassed. This connection will be reestablished as soon as h2susb78 is stable.
(corey, eric, jim, mitch)
#5
Shuffled a few pallets and now this box is in Staging Receiving ready to be moved out.
#6
Received Horiz L4Cs, put them on Optics Table and Hugo will test them. (attached is set-up photo)
#7
Stage-0 is on Assy Stand and helicoiling will be complete this afternoon
D. Barker, J. Garcia
The optical lever photodiode signals were added to the H2 SUS ITMY Simulink model ('h2susitmy.mdl') at the "L3" stage. The signals are routed to the second ADC on 'h2susb478', which is labeled "ADC_1" in the Simulink model. The "h2susitmy.mdl" file was modified to incorporate the four quadrant signals from the ITMY Optical Lever photodiode into the "QUAD_MASTER.mdl" library part.
In the 'h2susitmy.mdl' file, the four quadrant signals are on the ADC_1 channels:
UL = ADC_1_1
UR = ADC_1_3
LL = ADC_1_2
LR = ADC_1_4
NOTE: this configuration will hold true for the One Arm Test and does NOT reflect the latest H2 SUS ITM, BS, FM wiring diagram, D1001725-v10.
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In addition to the above changes to the "custom" top level Simulink model ('h2susitmy'), the "QUAD_MASTER.mdl" generic library part was modified for several bug fixes. Inside the 'QUAD_MASTER' diagram, the editing was performed mainly at the 'QUAD_MASTER/QUAD/L3/OPLEVWIT/' level. Initially, SUM, Pitch, and Yaw outputs were test points without filter modules. However, this prevented the DAQ from accepting these channels and writing them to frames, unbeknowst to CDS. These library parts were replaced with actual filter modules instead of test points. This resolved the ability to write these channels to frames.
The Optical Lever photodiode channels being written to frames are:
H2:SUS-ITMY_L3_OPLEVWIT_P_OUT
H2:SUS-ITMY_L3_OPLEVWIT_Y_OUT
H2:SUS-ITMY_L3_OPLEVWIT_SUM_OUT
The 'h2susitmy' model has now been recompiled and installed on 'h2susb478'.
In addition to the above changes to the Simulink model, there were two other modifications. The inter-computer communication library part (PCI) was removed, because the Optical Lever signals are now fed directly to the H2 SUS ITMY machine 'h2susb478'. Secondly, the input for the Laser Power monitor was grounded. Currently, the laser power is not directly fed to the ADC on 'h2susb478'.
The "short" cleanroom was moved from BSC8 to BSC1. Terry S. and crew will do first cleaning tomorrow.
In HAM4, the hand-brushing around the fins and first vacuum were completed this morning. This afternoon, wipe down and second vacuum were completed. Inspection should be completed by the end of the day. Flooring for BSC2 was brought from the VPW to the LEA. It will be installed after the dust barrier is removed from between BSC2 and HAM4. That activity should take place early tomorrow and then the door can be returned to HAM4.
- Cheryl, Travis The ring heater in BSC6 was installed on the quad with the correct screws, but with nuts instead of the nut blocks SUS made for the installation. This caused an issue when trying to close the RH around the ETM because one screw would not loosen, so would not allow one end of the lower segment of the RH to close. The solution was to modify a wrench, to maneuver between the main and reaction chains, to hold the nut while adjusting the screw and moving the RH into place. The modified wrench worked well, and allowed us to loosen and tighten the screws as needed to set the alignment of the RH. The upper RH segment is aligned to the scribe marks, and the lower RH segment is aligned to the upper segment. Uncharacteristically, I did not bring a camera, so there are no pictures of the screws and scribe lines on the upper segment. One of the flathead screws was loose on the upper RH segment. This is odd, and a little disturbing, because we had this issue before installation on the quad, and chalked it up to an oversight, then made doubly sure all the flat head screws were installed correctly. That means that either we (me, GregG, ThomasV, back in December 2011) missed one again, OR the screw is somehow backing itself out. I tightened the flathead screw, and the feel of the screw was comparable to the feel of the screw when I assembled the RH, so all indications are that Macor threads holding the flathead screw are OK. A picture of the exact screw I worked on, before it was tightened, and before the RH was closed, is attached.
h2susb78 (SUS FMY) crashed for the third time last night at 20 mins to midnight (so it is unlikely to be human activity). We are working on taking FMY out of the IOP and model DACKILL watchdogs for SEI BSC8 until we can fix this stability problem.
J. Garcia, S. Steplewski We made a set of TOP transfer function measurements on ITMY Tuesday. This was the first time we tested ITMY since this chamber was pumped down. Measurements were clean and the results match up reasonably well with the (fiber) model - although this is a wire rehang after the fiber break. The .mat files are located in: ~/SusSVN/trunk/QUAD/H2/ITMY/SAGM0/Data/ ~/SusSVN/trunk/QUAD/H2/ITMY/SAGR0/Data/ The .pdf files are located in: ~/SusSVN/trunk/QUAD/H2/ITMY/SAGM0/Results ~/SusSVN/trunk/QUAD/H2/ITMY/SAGR0/Results
Attached is another plot that shows the ITMY TOP transfer function taken In-Vacuum compared to that taken In-Air. Aslo plotted are the wire (for M0) and thincp (for R0) models for reference.
Mark Barton, Szymon Steplewski We changed the parameters in the Mathematica model for the QUAD suspension for ITMY to reflect the fact that the glass test mass is suspended from steel wires after the fiber break. These changes have resulted in noticeably better agreement between the measurements and model for several degrees of freedom. The TOP Pitch to Pitch mode around 1.4 Hz has shifted to higher frequency (from about 1.31 Hz to 1.44 Hz), while the Pitch mode near 0.56 Hz is practically unchanged, which is where we want it according to the design requirements. The TOP Longitudinal to Longitudinal plot also shows some nice improvement in the mode around ~1.5 Hz, which matches up a little more with the "wirerehang" model now. There is now a new wirerehang Mathematica model in the SUS SVN under ~/trunk/Common/MathematicaModels/QuadLite2Lateral/mark.barton/20120601TMproductionTMrehang/ which was built from elements of the fiber model under ~/trunk/Common/MathematicaModels/QuadLite2Lateral/mark.barton/20120601TMproductionTM/ We have added 'wirerehang' to the list of case models for plotting in Matlab, so the different cases are now: 1. 'wire' 2. 'fiber' 3. 'erm' 4. 'thincp' 5. 'wirerehang'
(from Betsy on behalf of Keita, Cheryl, Travis, Gerardo, Jason)
This afternoon:
We found 4 bright beams coming out of the viewport, two pairs belonging to ETMY and the other two from ERM. The two upper spots on the picture are from the ERM, the lower ones from ETMY. This was confirmed by moving the ERM, when doing so the two upper spots moved, while the other two remain still. The beam from the front surface of ETMY is the lowest spot on the photo.
Attached are plots of dust counts > .5 microns.
I performed the last checks (Spectra, static tests, pressure sensors checks, CPS offsets) on the ISI before the chamber closeout at BSC6. I started a last set of transfer functions for the night on ISI-BSC6 while Jeff.G is measuring L2 transfer functions on ITMY.
See report 2979, it happened again. we took the opportunity to ingest the ITMY optical lever signals into the ITMY SUS model.
D070081 S1102755, the e-traveler of which is available here: https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=58957.
ISC Anti-Image Chassis (S1102755) found to have bad channel on one of the filter boards (D070081 Rev 5 SN S1106145) CH4. U1 output railing at 14V. Replaced filter boards: serial number S1106145(Rev5) and S1106146 (Rev5) with S1201597 (Rev6) and S1201598 (Rev6).
Cheryl posted morning activities (below).
This afternoon's work:
(corey, eric, greg, hugh, jim w, mitch)
#5
Last couple of days, we have prepped this ISI to put it in a box. This afternoon, this ISI should be canned for your enjoyment.
#6
Not much going on with this assembly since we are waiting for hardware for the Actuators and CP Sensors. I installed the CPS Sensor Heads on their mounting hardware (the mini-racks are on floor under the ISI).
#7
Optics Table has been de-tanged & now removing broken tangs. Stage-0 can be put on Assembly Stand as soon as #5 is boxed.
The entire HAM (minus the fins) was brushed today. One drill was used. The crew shut down early to head to safety meeting.
Robert Schofield asked for a controlled experiment to document the behavior of chamber cleaning wipes when exposed to air. Random samples of three types were pulled from various sections of BSC2: last wipe (isopropanol soaked), glove wipe, and dry wipe. The wet "last wipes" are hung up in the OSB Optics lab on a wire strung across a flow bench. Please do not disturb the wipes.
Morning: Betsy and Travis at EY Dave/Jeff software issues fixed to allow ITMY to damp Huge at BSC8 changing protection for the cables (trips ISI but not SUS) Some spikes in dust, but all recovered quickly
