Yesterday we aligned the AOM in the high power path. The alignment was optimized to have maximum power in the right direction of the first order diffraction, in order to be able to dump this beam in front of the PMC, see Tablelayout (DCC-T0900610). 

The alignment of the PMC was optimized for high power operation. Afterwards we had 156W in transmission and 14W in reflection of the PMC without a beam diffracted by the AOM.

We also calibrated and linearized the diffraction of the AOM (the potentiometer in the Servo was adjusted to have 0.234V at the signal connected to the AOM driver, when the AOM offset was 0V).

In AOMOffset2power.pdf you can see the linerization. 

From the fit in AOMSignal2Power_diffraction.pdf one can get the values to calculate the AOM diffraction in %.

We are moving the pure GC CDS servers from the MSR to the computer users room this morning as part of the CDS maintenance.

alog was one of these machines, it is now up and running in its new location and we dont expect any further downtime.

The other machines which will go down during this move are:

yakima (bugzilla)
redoubt (CDS SVN)
sugarloaf (email VE alarms)

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.

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.