Attached are plots of dust counts > .5 microns. The dust monitor in the "Beer Garden" and in the OSB bake oven room are not plotted. Both have reported sensor failures.
HAM-9 close-out work (second vacuum, inspection, post-work sampling, and door replacement) was completed today. A cleanroom was moved over HAM-10 for dust barrier retrieval tomorrow and staging was started around HAM-11/12.
Here is the power trend of the high power oscillator for the last week after realignment. It appears as if some components are still settling.
The ISI was rehung (moved clean room out of the way. Lift gear was reattached, ISI unbolted from MTS and lifted. Unit was shift East (toward corner station) 7" and lowered back to MTS. This shift accommodates the attachment of hte TransMon. It does make working on the East side of the ISI quite tight...won't be too fun but we'll manage. Thanks JimW & Apollo (Scott Mick & Mark)
Attached are plots of dust counts > .5 microns. From a plot of H0:PEM-LAB_DST3_MODE it appears that communication was lost with the dust monitor in the bakeout lab at around 17:43 UTC.
In-chamber cleaning in HAM-9 got through wipe down today. Second vacuum was delayed by the absence of a clean vacuum brush which was retrieved from a Class B bake late in the day. (One had not been set aside as the crew normally does.) In the meantime, the east door was cleaned so that it is ready to be put back on Monday. The dome was replaced on BSC-4 this afternoon and then the cleanroom was moved over HAM-10. We will re-sample the HAM-10 floor, pull the dust barrier, wipe down the floor, and then sample the floor one more time. A cleanroom was also moved over HAM-11/12 so that first and second cleanings can begin ASAP.
This afternoon: Violin modes were measured. (512,512,516,509.5, although further comments coming.) The ITMy and PUM were clamped. Weld vapor residue was removed from both PUM ears and the left ITMy ear. The vacuum and isopropanol damped alpha wipes were used. Fiber guards were installed.
Jeff and Andres are fixing roll of Q4, adjusting shims for hopefully the last time. Height of the main and reaction suspensions are correct. Before today's adjustment the shim stacks were (as viewed from the R0 chain): R0 Right: 2.5mm R0 Left: 1mm M0 Right: 1mm M0 Left: 2.5mm
This morning, Giles, Travis, Mark, and Jason measured modes of the single pendulum monolithic: Bounce = 6.7 Hz Longitudinal/Transverse = 6.66 Hz Pitch = 1.1 Hz Yaw = 1.1 Hz All as expected. Roll and violin measurements to take place this afternoon.
TYPO on the Longitudinal/transverse - it should actually be 0.66 Hz.
Some photos of progress stuffing CDS racks, both in the H2 electronics building, and at EY. Plenty of cable trays mounted, too. i) nearly-complete (for entire diagonal) SUS electronics in racks in the e-building ii) DC power distribution racks in the e-building iii) SUS/SEI electronics, cabling and trays at EY
The M0 and R0 diagonalization measurements for the Yaw DoF were run today using the DTT templates"x1_susquad_M0_yaw_diag_111103.xml"and"x1_susquad_R0_yaw_diag_111103.xml", located in the SUS SVN in'~/SusSVN/sus/trunk/QUAD/X1/Common/dtt_templates/'. The first plot is of the M0 stage. The F1 OSEM is roughly ~20dB isolated from the Yaw DoF for the M0 stage. All other OSEMs are at least ~35dB isolated from Yaw. The Yaw excitation was a 1.353Hz sine wave with 250cts of amplitude. The second plot is of the R0 stage. OSEMs "F1" and "SD" are about ~25-30dB isolated from Yaw. The other two OSEMs are at least ~35dB isolated. The excitation was a 1.3Hz sine wave with 35cts of amplitude.
The"Load_MEDM_Values_X1.m"script to fill the X1 QUAD's matrix values, OSEM sensor gains, and turn on switches was run today to prepare the latest QUAD build for testing. The script can be found in the SUS SVN in'~/SusSVN/sus/trunk/QUAD/Common/MatlabTools'.The OSEMINF offsets for for the L1 and L2 stages were turned off manually. The outputs now oscillate about zero. M0 and R0 OSEMINF offsets are currently at 15,000cts such that the outputs now hover about zero. All OSEM input and output filters are on as well with gains of -1 for both input and output filters on both M0 and R0.
ICC continued in HAM-9. The detailed brushing (fins and hand-brushing around support tubes) work was completed this morning before the break for electrical safety training. After lunch, first vacuum was completed. We are ready to start wipe down in the morning.
Giles, Travis, Danny, Jason Today, after a few false starts*, the remaining 2 fibers were welded onto the ITMy After annealing, it was successfully hanging. The pitch error of the ITMy was found to be 2.17mRad up. The separation between the ITMy and PUM was measured to be 601.5mm (expecting 602mm). *2 fibers were removed as the first welds were poorly aligned.
Attached are plots of dust counts > .5 microns.
- EY: BSC6 H2 ETMY ISI craned on to test stand after cleaning by Kris and the crew.
- Many SUS visitors on site for fiber welding.
- Swagelok delivery for Hugh. Praxair delivery at 4:15pm at MY LN tank.
- TMS work ongoing at EY, CraigC and ChrisG assisting.
- PeterK, BennoW, and AEI/LZH group assisting with PSL installation
- Sam Waldman and squeezers continue investigating H1 OMC issues. Squeezers locked H1 this evening, LVEA in laser hazard.
- Two Control Room projectors need their bulbs replaced.
After a bit of a marathon afternoon/evening, Travis, aided by Danny and oversight by Giles, welded 2 of the 4 fibers on the monolithic suspension. Three fibers were actually welded on, but the first was removed due to a questionable brushing of the fiber. It was removed under the "when in doubt, pull it out" rule and the next 2 fiber welds commenced.
Attached are plots of dust counts > .5 microns.
Brushing began in HAM-9 and was ~95% complete by the end of the work day (which was a little early due to safety meeting). Only the fins remain to be brushed. There were a few problems with drills: three did not run for very long (less than 10 minutes) and then there was some difficulty getting a brush to detach from the chuck when a brush change was needed. The drills in question had been stored in N2.
Today, Travis, Giles, and Danny removed the remaining stock ends from the broken fibers on ITMY. Then, with Jason's help they finished setting the UIM, PUM, and ITMy (6each) DOFs appropriately in preparation for fiber welding. This included using the v-block refit with Doug's floating bearings. Other weld equipment was checked over and calibrated in prep (new tweezer tips, etc.). I used the DI N2 gun and the vacuum to do some further cleaning of the structure and the ITMy barrel. I had to dry wipe the top of the barrel mid vacuum to get particulate to come free from the surface. In the end, I think the vacuum with small OD PTFE hose lightly touching the barrel surface did the best job there. Numbers are being checked once more and we expect to be welding by tomorrow.
Attached are Giles' pictures of the breakoffs of the horns for re-welding. After some analysis of the horn-horn distances, he reports that "the scribing was very successful with all PUM welds looking good (and fairly similar within expected error of about 0.35mm). We just need to be aware of one weld on the ITM which broke 1.3mm too high and slightly above the scribe. This is easy to do with shortening the fibre."
