Last Friday I spent most of the morning compiling, testing and modifying the code to read and control the dust monitors. This interrupted the data read from end X. I ended up reverting back to the old code sometime before 12:30 PM.

Today I spent most of the morning doing the same, except it interrupted the data read from end Y. I ended up reverting back to the old code around noon.

This afternoon Michael R. swapped the dust monitor in the H1 PSL Anteroom (LVEA location 16), to investigate if the high counts for particles > .3 microns read last night might be due to an error in the instrument. I ended up restarting the code for all the dust monitors in the LVEA after this was completed.

I received an error trying to plot the particle counts, so I do not have plots to attach yet.

Dave, Hugo,

Sometime around 4.30pm today, HAM2-CPS-H1 showed ~ +32000cts. The Watchdogs were then tripped. We turned off the master switch on the medm screen and the coil-drivers electronics, the readouts remained the same.

Dave and I restarted the h1iopseih23 and the computer/frontend. No change.

Connecting the faulty channel on another sensor interface showed that the signal was following the channel.

I went upstream and checked the voltage outputted by the ADE box of the CPSs: 

-over 13V for this sensor.

-Within +/- 1V for the other ones

I tried connecting CPS-H1 on its neighboring ADE board. I also tried swapping the FeedThrough-to-ADE in-air cables between H1 and V1. 
The readout of CPS-H1 came back to normal during this process. It seems like the in-air FeedThrough-to-ADE cable of HAM2-CPS-H1 is faulty. I left it ON keeping in mind the symptoms we saw. 

Check ResourceSpace for the photo collection of Keita, Cheryl, Deepak and Corey inserting the sled.  You can call it a breadboard if you want.  Bonus:  A couple shots of Travis working on PR2.

Mark B.

After Travis tweaked the BSFM02 on the solid stack, I retested it. I gave up on the Matlab script for data taking and used some DTT templates that Jeff K pointed me to. The data is at 

^/trunk/BSFM/X1/BSFM02/BUILD01/SAGM1/Data/2012-09-25_1100_X1SUSBSFM02_M1_*_WhiteNoise.xml

I modified the standard analysis script to use H2:FMY in the channel names but X1:BSFM02 for the data directory and plot labels. The modified version is 

^/trunk/BSFM/Common/MatlabTools/plotBSFM_dtttfsBSFM02.m

The data is a tiny bit noisy, having been taken in the middle of the day, but all the peaks are in the right places and the spurious 11 Hz peak is gone.

The Apollo crew stood down from ICC to work on BSC8 cartridge de-install staging. They positioned the leg-jacks near the appropriate legs and checked for orientation; installed four leg-jacks on the chamber cleanroom; located three BSC dome flats and two HAM ISI storage covers to use in place of BSC Dome Tall; retrieved the dome counterweight from X-end; and removed the dome. 

In addition to the backsight error I've been fighting against since 17Sept, see aLOGs 4223 & 4242, and disclosed in yesterday's log 4286; this morning I realized all this time I had failed to correct my target elevation for the HAM1 global to local level difference.  This now puts the Optical Table ~5mm low and this is well explained by the modeled vs measured compression of the Viton Springs which has put the Table 5.33mm lower than planned.

I will correct the incorrect payload noted in aLOG 4242 (11.25lbs) but this won't do too much to change the height and then we'll adjust the vertical to within spec using HEPI.

Thank to everyone for patiently helping me for the past week.

Attached are plots of dust counts > .3 microns and > .5 microns in particles per cubic foot.

Note high particle counts > .3 microns in the H1 PSL Anteroom (H0:PEM-LVEA_DST16_3). The > .5 micron counts are 0. The cause of this is as of yet unknown.

Cheryl, Keita, Deepak installation in HAM3
Corey taking packaged box of lasers from corner station to mid Y
Pickup of pallet
Corey to EY to look for parts
Bubba to end Y to bring toolbox to corner station
Jonathan H. to LVEA to look for GC wireless access points
Dave B. to set settings for H1 PSL ODC channels
Dave B. to install Apache on DAQ test stand
Pickup of cardboard container
Return of cardboard container
Very high > .3 micron counts in H1 PSL Anteroom. Unknown case at this time.

This come down to me cutting an inch from my backsight but I should have cut 2.  Maybe you put the 15mm & 9mm together and come up with 1".  Yes, my instrument was 1" higher than I thought putting my results 1" lower than reality.  I'll give the show and tell to anyone who cares.  My apologies to anyone fretting over this.
However, we are still 9mm high which is closer than 15 but still a lot and maybe too much for HEPI.  We are now waiting to hear from ISC to learn what they can tolerate.  See aLogs 4223 & 4242 if you need.

Sadly, the 2" lens on the QPD sled for HAM3 was scratched during the transport from the lab to the LVEA. When we took the sled assembly out of the bag and unwrapped, under a strong lighting it was clear that the center of 2" lens surface that faces outside was scratched, most probably by the aluminum foil that was used to cover the entire assembly. We couldn't blow it off using nitrogen gun, so it's not just particulates.

We have more of these lenses and we'll have one class-A-ed ASAP so the impact on schedule is minimal, but next time we transport any super polished optics, I'll make sure that I first cover it using Vectra Alpha 10 wipe for protection befure wrapping it in the foil. The reason why it was not done was because I couldn't find Vectra wipes in the lab, but it seems like no wipe = no transport.

I'm going to run these TFs from home tonight.

The chamber cleanroom was moved over BSC5 and bolts were pulled from the doors and the dome. The crew was pulled off t work on BSC8 de-install.

The four H1 PSL safe.snap files were committed to the userapps SVN repository under userapps/trunk/psl/h1/burtfiles as

iss/safe.snap, fss/safe.snap, pmc/safe.sna and dbb/safe.snap

The corresponding safe.snap files in the target area were made to be symbolic links to these files.

The ODC group (Ryan F) requested some PSL ODC channels have non-zero default settings. These were added to the running system, and the ODC channel blocks were added to the safe.snap flies for ISS, FSS and PMC.

See the attached photo of the SW corning of BSC1 where there is a temp reader of some sort.  I must relocate this as it is where the HEPI plumbing runs.  The Installation Manager said go ahead so I moved it to the other side of the viewports on the same flange still on the SW corner.  If any one cares about how good a job I did of applying the proper amount of pressure etc of placing this, please give it a look over.  However, if you try to look at data you likely won't see much as there is no cable connected to the satellite box downstream.

Mark B.

Picking up where I left off on Friday, aiming towards getting TFs.

There appears to be a favorable slope change starting ~ Aug 8 (65 days on this log/log plot) Browsing the aLOG I find that near that time there were ring heater operations, and one week prior to this Kyle disconnected a small turbo pumping the BSC6 annulus. I don't think either of these explain the slope change. I also looked at the big ion pump voltages during this period - there were no step changes anywhere near this time.

GV18 was cycled on August 7-8 -Rai might have been making RGA measurements?

From initial alignment data, we know the following:

Positive offset in PIT (H2:SUS-ETMY_M0_OFFSET_P and H2:SUS-ITMY_M0_OFFSET_P) will tilt the mirros such that the reflected beam off of the mirrors will go down.

Positive offset in YAW will tilt the mirrors such that the reflected beam off of the mirrors will go toward the inside of L.

That is, the upper stage of ITM looks like the mirror image of the ETM. Why is this the case? I thought that they are identical.

Also, I think oplev sign is somehow wrong. It's not consistent with initial alignment data.

FYI, the sign of the things in initial alignment was figured out by:

First using baffle diodes to figure out the sign of the TMS to figure out the TMS sign, and make the first beam hit the center of the ITM.

Then using ETMY cage and CCD camera, make the reflected beam from the ITM hit the cage bars to figure out the sign of ITM.

Then move offset of ETMY so that the beam comes back to the table, then move TMS and repeat, to see if ETMY sign is the same as TMS (it is).

As you can see, there is not much ambiguity there.