Adjusted UIM mass distribution in order to take differential pitch contributing from above and below the UIM.  Pitch alignment numbers and actual weight distribution to follow.  The monolithic was left clamped, shielded, and covered for the night.

For clarity on the status and naming conventions of the SUS QUAD builds, today begins the testing of QUAD 04 BUILD 03. This is the latest QUAD build that is destined to become the ETMY QUAD suspension. Until then, subsequent measurements and data should be saved and committed to the SUS SVN under:

 '~/SusSVN/sus/trunk/QUAD/X1/QUAD04/BUILD03/' 

QUAD 04 BUILD 02

The Yaw DoF Diagonalization measurements for the R0 mass on the latest QUAD build were run yesterday and are attached below.  The measurement was sine wave excitation at 1.3Hz with a 100-ct amplitude. The "F1" and "F2" OSEMs contribute to the "Yaw" DoF.  The "F1" and "SD" isolation is at about ~28-30dB below the "Yaw" OSEMs.  The other two OSEMs are isolated well below 30dB from "Yaw".  These results indicate good isolation of the "Yaw" DoF on the R0 mass.

So, following up a little further on Jeff and my diagnosis of H2 SUS FMY (the suspension formerly known as X1 SUS BSFM01), I attach a comparison between the data taken on Tuesday (111108, in Black) vs. the last data taken before it was transported over to the LVEA (110823, in Orange).

A few of my concerns are reduced to "don't worry about it's" immediately:
- In comparing model vs. measurement, lower frequencies on high frequency modes in T, V, and R are expected -- they match this suspension's previous measurements.
- Though the highest frequency Y mode discrepancy is a measurement resolution issue. The 110823 measurement was taken at a 0.01 Hz BW across the 0.01 - 50 Hz band in DTT, where the 111108 measurement was taken with a 0.5 Hz resolution in the 0.5 to 15 Hz band. We'll fix this for future iterations. My guess is that the resonance is just fine.

However, the mysteries that still remain are:
- What's that bump at 0.65 Hz in L?
- What's the rubbing 'causing the lowest Pitch DOF modes to be lossy / invisible?

---------
Plots produced by 
{susSvnHome}/SusSVN/trunk/BSFM/Common/MatlabTools/plotallbsfm_tfs.m

and should be easily adaptable to future measurements by just adding information to measList and defining which to plot in useMeasts. Note that it relies on .mat files that have been produced by running
{susSvnHome}/SusSVN/trunk/BSFM/Common/MatlabTools/plotBSFM_dtttfs.m
or
{susSvnHome}/SusSVN/trunk/BSFM/Common/MatlabTools/plotBSFM_matlabtfs.m
with saveData = true. 

As mentioned in Hugh's aLOG entry (though not as logbook admin), one should have the ability to assign multiple tasks to an entry, as some may pertain to more than one subsystem or task (e.g. his entry about feedthroughs).

Adding a comment should by default have the same section and task as main entry.

While continuing to be logged in, after posting a comment, one should be able to edit comments that you've written in a similar fashion as the main entry.

The pump in the dust monitor at mid X (S/N 980700963) appears to have failed. I have removed this dust monitor from mid X.

Today, Travis and I hung the ITMy monolithic lower chain in a triple.  Jason can fill in the numbers more completely, but we reconfirmed that the pitch error between the test mass and PUM was 1-2mRad (single pendulum hang).  The PUM to UIM differential pitch was ~5mRAD (double hang) and there was a pretty serious mis-pitch on the UIM when hung in a triple from the triple hang tooling.  We made one round of adjusting masses on the UIM, but have more work to do there tomorrow.

The attached plots are the results of open-loop transfer function measurements for the M1 stage of H2 FMY. The measurements are open-loop from the "H2:SUS-FMY_M1_TEST_*DOF*_EXC" channels to the "H2:SUS-FMY_M1_DAMP_*DOF*_IN1_DQ" channels. Results agree quite nicely with the model. There might be a lower signal-to-noise ration for the really low frequencies (See "L","P",Y" below 0.5Hz), so further measurements with higher drive amplitude in this band might be desirable. Scripts, data, and plots are in the SUS SVN.

Excitation and Data retrieval script:
'~/SusSVN/sus/trunk/BSFM/H2/FMY/SAGM1/Scripts/collect_TF_H2FMY_M1_allDoFs_0p05to50Hz.m'

Data .mat file:
'~/SusSVN/sus/trunk/BSFM/H2/FMY/SAGM1/Data/111108_H2FMY_0p01to50hz_all_DoFs_5Kcts_highres.mat'

Plotting script:
'~/SusSVN/sus/trunk/BSFM/Common/MatlabTools/plotBSFM_matlabtfs.m'

Plots (individual and combined):
'~/SusSVN/sus/trunk/BSFM/H2/FMY/SAGM1/Results/'
 

Attached are plots of dust counts > .5 microns. Channels for LVEA Location 11 were added to the frames this afternoon.

Since the Apollo crew got the large shelving units set up in the West Bay of the LVEA, we started with a little clean up today so you will notice a few changes. There will be more alterations as we prepare to receive more beamtube parts, get ready for the BSC-8 cartridge install, and clear out the area around the H-1 PSL enclosure.

FTIR results from BSC-4 came in this afternoon. Although there were three "hot-spots" among the pre-work samples, all three cleaned up nicely (at or below detectable)after brushing and wipe down (and that includes the "green goopie"). Please see actual reports attached.

The north and south doors blanks were removed from the chamber and the O-ring protectors were installed. Everything is ready to start brushing tomorrow.

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.

Comments do not show up as results of search queries for them (I've tested by searching for entry ID #, author name, and keyword search).