In HAM2:

- by changing IM1 alignment, beam on IM2 moved about (0, -1.2mm), (pitch, yaw)

- by changing IM2 alignment, beam on IM3 moved about (-1.1mm, -1.8mm), (pitch, yaw)

- by changing IM3 alignment, beam on IM4 moved about (1.3mm, 0.3mm), (pitch, yaw)

None of these numbers themselves is large enough to be of concern.  

In HAM3:

- by changing IM3 alignment, beam on PR2 moved about (20mm, 4mm), (pitch, yaw)

- by changing IM4 alignment, beam on PR2 moved about (0, 18mm), (pitch, yaw)

Doug,Travis, Mark Barton
We ran into issues with the fiber profiler. We are unable to get the proper results and ended up with bogus numbers and graphs. Travis emailed Angus who had seen this similar problem before, but wasn't certain of the cause either. We ran 2 different programs and tested them with both new and old data sets yielding the same out come. Mark worked with us later in the day but found nothing obvious either. He will look at the programs, data base and spreadsheets tonight to continue to debugging. Rebooting the computer had its own problems as it took several tries to get it back online. We did manage to tweak the profiler mechanical alignment which allowed us to run continuous passes without having to stop and refocus several times.

In conclusion if Mark does not find an obvious problem we will wait until Jan to proceed. The puller is ready, just waiting for the profiler evaluations before the production run. The micrometer is fixed in place and alignment rechecked. I made up several more substrates and cleaned up some more clamp blocks and supports.
If Mark finds a fix we may hit it again tomorrow.

For the record, the following are the nominal values used for the large ion pump controllers (listed in the order queried by the MultiVac firmware Flow 7):  

Torr
Spare
7000V 
200mA 
200watt 
Protect
10mA 
STEP 
5000V 
1.0 x 10-3amps 
3000V 
4.0 x 10-5amps 
(StPt 1) 1.0 x 10-5torr (not used?) 
(StPt 2) 1.0 x 10-6torr (not used?) 
1.0 x 10-10 
1.7 x 10-9 
8.0 x 10-7 
2.0 x 10-4 

We soldered together two DB37 adapters to set the gains of the photodiode amplifiers manually. During testing in the corner we noticed that channel 4 was busted. We rewired PD 4 onto channel 3 and left PD 3 out. The transimpedance gain setting in the corner is 20 kOhm and 200 kOhm in the end. Each adapter uses 2 toggle swirtches, labeled D0 and D1, to set the gain:

• D0 and D1 open: 20 kOhm
• D0 closed, D1 open: 200 kOhm
• D0 and D1 closed: 2 MOhm
• D0 open, D1 closed: 20 MOhm

Andres R & Jeff B

   After releasing the stops on H1-SR2, we took a series of measurements to confirm the suspension made the trip from the staging building to the LVEA with no problems. The height of the bottom mass is 215.36mm (within tolerance), there is no pitch or roll in the M1, M2, & M3 masses, and the four lower blades are co-plainer with less than 0.5mm difference.
 
   We adjusted the BOSEMs for 50% light. Turning on the damping filters showed a sign problem the side BOSEM. Checked the sign conventions in E1100109 and T1200015, and found the side BOSEM sign should be “+”. This was changed in the OSEM2EUL, EUL2OSEM, and Output Coil matrices. All damping filters are now working correctly. 

   Started Phase 2b TFs. Will check the results in the morning.   

Summary: Green injection hits the center of ITMX, comes back to the center of ETMX, and then back again to the center of ITMX. The alignment is good, with one caveat that HEPI should be tilted significantly in  PIT to help TMS. Since EX PIT is unaffected by the HEPI, we're using EX sus bias to point it down by 330 urad.

1. Green beam from TMSX to ITMY

After Kyle opened the GVs we started scanning TMS to find the green beam on ITMX baffle diodes. Somehow PD4 amplifier was busted so we reconnected PD4 to PD3  amplifier.

At first TMSX was pointing up too much, and I had to give HEPI a PIT (RY) offset of -12000 counts to H1:HPI-ETMX_BLND_IPS_RY_OFFSET with a gain of 1. HEPI loops were all open, so that just gave a DC offset to the HEPI angle. After that treatment, we were able to maximize the output of three baffle diodes using the following offsets for TMS bias:

See E1300634, figures 12 and 13, for the diode layout. PD1 and PD4 are two diagonal ones around the baffle hole, PD2 and PD3 are far from the mirror. "Center" is the mean of PD1 and PD4 and should be close to the real center of the optic.

Baffle diode channel names are H1:AOS-ITMX_BAFFLEPD_1_POWER etc., but they are not trended as of now. Also note that H1:AOS-ITMX_BAFFLEPD_3_POWER is actually reading PD4.

Transimpedance for the PDs were set to 20 kOhm, and when maximized the outputs were about 2.5V for PD2 and PD3, and about 2.3V for PD1.

JimW GregG Hugh

No issues to report here.  Jim got non-plated screws for screwing into the aluminum and this helped things go smoothly.  Couple photos attached--lots of space available still!

As a preparation for the PSL power increment, a mid-high power beam dump, Kentek ABD-2NP, was installed in the IMC REFL path on IOT2L. It is in the location of IO_MCR_BD1 (see the layout D0902284-v9). This dump is capable of 50 W.

Burped GV7's gate annulus volume into annulus ion pump only instead of pump cart-only minor bump in ion pump current -> valved-out XBM turbo  -> opened GV7 -> Burped GV20's gate annulus volume into pump cart - pegged ion pump current briefly -> Valved-out pump cart and verified that ion pump could handle gas load with gate annulus valved into ion pump -> closed gate annulus isolation valve -> Disconnected pump cart from annulus plumbing -> Valved-out X-end turbo -> Opened GV20

PSL was found to be down this morning. The interlock was triggered on Dec. 22nd at 17:26-ish PT. Most likely due to an error in the water flow meters.

The X end PLL is locked. 

The laser settings are: 1.842 Amps and 31.77 C, with these settings the temperature can be adjusted to move the beat note +/- 400MHz with no evidence of mode hopping. 

The gain settings are -8 for fast gain, -4 for common gain, giving a ugf of 13.6kHz (open loop gain first photo).  I first locked with a fast gain of -5, commong gain -4, ugf 17kHz, but this resulted in some oscillations at 200kHz, shown in the second attached photo.  these are gone with the lower ugf, 3rd photo. 

The frequency comparator is not working well, for now we can lock using the ceiling camera to look at the spectrum analyzer, but not the autolocker which relies on the readback of the beat note frequency.  This readback is OK when the loop is locked, but not verry usefull otherwise. The problem is probably that we are sending 20dBm into the timing comparator for the VCO readbacks, and our signal is more like -30dBm on the adjascent channel.  We encountered this problem at end Y and fixed it by adding attenuators.  I gues that we need to add the final solution to the issue tracker so livingston doesn't have the same prolem. 

I moved the TMS alignment offsets -6urad in YAW to realign the beam on the refl PD. As you would expect, this is in the opposite direction from the shift when we turned the cleanroom on alog 9905

The attached trends show clearly the temperature drop at the time that the cleanrrom was turned off alog 9023, and although the alingment did drift at that time, the beam didn't really drfit off the diode until 10 hours later. 

The temperature shift does show up on the bosems, but doesn't agree with the shift needed to realing onto the diode.

current offsets are 13 PIT, -325 in YAW.

- Kiwamu, Cheryl I

M1 and IM2 were aligned through the FI using beam clipping on the iput aperture and the beam at the output of the FI (no baffle to see, but other clues used to center).

After burning time on IM3 and IM4 and not making progress, I came up with a plan to use the wall markings and IM4 TRANS QPD to fine tune IM2 and IM3 alignment. The matks on the wall were from October. The two feducials should give a beam from IM3 that is at the same position and angle as the beam from October.

The beam on the PR2 baffle was difficult to see, but did cross the baffle when driving IM3 or IM4. Exact alignment wasn't possible, and when I left Kiwamu was working on getting a good camera view to assist in centering the beam using IM4.

Noticed the drive to ISI actuators gettting larger and JeffK thought it might be that the Boost2 was on with the level3 controllers.  It was nearing ACtuator trigger levels and we switched it to boost3.  Maybe too late or maybe you must start from scratch but it still tripped the Stage2 WDs.  Jeff brought it back up to level3 and still in boost2 rather than 3.  We had though it might have been related to me just jumping staight to level3 from level1 earlier.  Attempting to run a spectra to see what is happening but my session had died onme twice--I'll take this up later.

Meanwhile--maybe there is a script error engaging level2 boost in the level3 isolation?  For the moment I'll leave it in level1.

Been distracted so I'm not sure what the state has been for a few days but attempted to turn on the BSC9 ETMx ISI and it tended to trip due to the T240.  RyanD(LLO) reminded me of the steering offsets, I didn't think they'd matter that much for the ISI since HEPI can do so much more but I looked at them anyway.  Since before the pump down beginning ~10 Dec, the alignment targets or CPS Offsets had not been reset.  This causes too great a drive and saturates theT240s.  So I reset both the Offsets and the Targets.  I should have just done the offsets first to see what happens but I did both.

Looking at the cartesian positions, the Zs and Rzs saw some very large shifts during the pump down.  Stage1 & Stage2 Z both saw 17umeters drops.  Much more drawn out over time the Rz of the two stages saw ~10urad shifts.  These are possibly attributed to buoyancy and thermal effects.  The translational & Rx/Ry changes were more like 1um.

Anyway, bottom line, the CPS offsets and targets were too far from the idle free position and would not stay stable trying to move these large shifts.  Now with close offsets and targets, the system turns on quietly.

I started with level1 and then rememebered Hugos status log where he put us at level3 isolation.  I bumped it up to that directly.

Attached are some trends of the CPS positions since before the pump down.

LVEA Laser Hazard

Apollo Installing TCS plumbing in the LVEA
SEI group Running HEPI transfer functions   

09:00 Richard remove yellow view port cover on X-Arm spool to check ACB photo diodes 
09:10 Andres in LVEA working on H1-SR2
10:22 Corey going to End-Y to recover camera equipment
10:30 Richard open gate due to snow and slick roads
10:37 Kiwamu Working on IOT2L in LVEA
10:51 EE interns pulling cables around HAM2
11:00 Cheryl & Kiwamu Open HAM2 East side view ports, with ALS pipe closed, to look at in chamber optics 
11:02 Filiberto working on diodes at the BSC3 SUS rack	

Richard, Filiberto, Daniel

We tested the photodiodes and they seem to be all working. There was a problem with the ordering as seen by the slow controls system. This is fixed now, and the order has changed relative to an hour ago. 1 and 3 swapped, and 2 and 4 swapped. This also brings the order as shown by the medm in agreement with the AOS drawings. We also added the hooks for the binary outputs to adjust the gain. However, these won't be activated until we receive the binary EP module. For now the gain adjust on the medm does NOT work and needs to be done with a breakout board directly at the DB37 of the PD amplifier.

J. Kissel

Ran transfer functions of H1 SUS RM1 and H1 SUS RM2 after Jamie, Alexa, and Kiwamu adjusted the eddy current damping (see LHO aLOG 9034). Results look virtually the same as before (see LHO aLOG 8725); the transfer H1 transfer functions still look different from LLO's RMs, and there's still an anomalous feature in the Yaw to Yaw TFs for H1 SUS RM2. 

Things that *have* changed: 
- H1 SUS RM2 anomolous resonance has *moved* a little
- The high-frequency magnitude for the L2L and P2P transfer functions of H1 SUS RM1 has increased by a factor of ~10 (!!)
- The frequency at which the high-frequency magnitude turns from f^{-2} to f^{-1} has changed for all DOFs in both SUS.

Please note that I'm still using an out-dated, incorrect model for the HTTS that do not include any eddy current damping or local damping. The measurements were taken with the local damping turned off. Mark is close, but not finished with the Matlab model modifications to address eddy current damping appropriately. Next time.

I attach three different comparison plots, all with the same data sets, just different traces compared on different plots so you can see them all and compare them in different ways. 
- allhttss_2013-12-20_Phase3a_H1SUSRM1 ... has the L1 RMs and H1 SUS RM1 measurements before and after the latest adjustment
- allhttss_2013-12-20_Phase3a_H1SUSRM2 ... has the L1 RMs and H1 SUS RM2 measurements before and after the latest adjustment
- allhttss_2013-12-20_Phase3a_H1SUSRMs ... compares the latest measurements (after the adjustments) against each other, and the L1 RMs.

(Alexa, Sheila)

We adjusted the alignment on ISCTEX and have found a beatnote .

The crystal temperature was around 31.7 degC and the beatnote is -50dBm at 42MHz (see picture below).