Attached are plots of dust counts > .3 microns and > .5 microns in particles per cubic foot requested from 5 PM Jan. 27 to 5 PM Jan. 28. Also attached are plots of the modes to show when they were running/acquiring data. Dust monitor 10 in the H1 PSL enclosure is still indicating a calibration failure.

The data was taken from h1nds0.
1260 seconds worth of data was unavailable on this server
1440.0 minutes of trend displayed

Transfer functions were measured during the week-end. Stage 1 and stage 2 look good (cf TF_L4C & TF_GS13). On the other hand, the TFs from stage 1 actuators to T240s in corner 2 and corner 3 don't look right (gain and resonance). These 2 instruments don't seem to work properly.

Matt, Keita

As noted in entry 5279 we had some trouble with changing MC2 acuation after the MC2 model change/restart.  It is not clear if the state before the change was the "right" one, and no explanation for the change was found (all MC2 coil driver bits were flipped, with no apparent change).  This should be looked at again with a model of the system in hand so that the measurements can be compared with expectations.  Since the "new" MC2_M2 TFs make the L1 filters stable, I am inclined to guess that we have returned to the "right" state.

In this state I changed the M2 stability filter to be very simple (zero at 2Hz, pole at 8Hz).  This gives the M2 cross-over resonable phase margin for all UGFs below 10Hz.  The attached images show the MC2 TFs with the M2 gain set to zero (no M2 actuation), M2 gain set to 0.03 (generally enough, and good for locking), and M2 gain of 0.1 (good for ISI work or high seismic times).  The maximum "good" value of the M2 gain is about 0.2, more than 0.3 is unstable.

Note that in the TFs involving MC2_M3, this system is working with heirachical control, so the measurement includes M3 and M2 (e.g., the whole MC2 actuation, or combine MC2 M2 and M3 actuator).  These TFs show that the M3 gain has about 8dB of gain margin, so gains more than about -2000 are likely to cause problems (-1000 is the nominal value).

Mark suggested to modify the "plot****_dtttfs.m" scripts for QUAD HLTS HSTS HAUX and BSFM. 
From now, it will automatically create a Results folder in the right path (if it is not already existing) to save the pdf figures.

For example .../SusSVN/sus/trunk/HAUX/Common/MatlabTools/plotHAUX_dtttfs.m 
line 108 to 113 :

DIR=exist(resultsDir,'dir');
if DIR==7
else
    system(['mkdir -p ' resultsDir])
end

We (Randy & I) got the 4 Vertical Actuators attached along with the SE Horizontal.  Hopefully we'll wrap this up mid-day tomorrow.

Ready to vent Y-end

LVEA laser safe all day

1030 Dave B restarting  PEMs and DAQ
1030 Cheryl and Kiwamu working in HI PSL enclosure
1040 Kyle to Y-end to prep for venting
1100 Corey G to LVEA then Y-end looking for "stuff and things"
1200-1245 Cheryl doing viewport work on HAM2, PSL shutter closed (see other aLog entry)
1240 RDO tractor onsite dropping repaired John Deere
1415 Jim B working in H1 EE room
1500 GV18 closed


Ongoing:
-No horseplay around Doug Cook's transit parked near termination slab of YBM. Marked with caution tape.
-ITMY watchdogs tripped all day. Optic seeing motion as a result of SEI actuator work on adjacent chambers.

   We have completed taking Phase 1b transfer functions and spectra testing data for the India HLTS SR3. The results data looks positive. The data files are posted below. We will wait for the review of the results by Jeff K and Stuart A before doing anything more to I1-SR3.   

- Cheryl, Kiwamu, Slim and Mark (Apollo)

A camera was installed on the REFL beam viewport where the REFL beam will exit the vacuum system through a baffle and viewport.  The camera view is available in the Control Room, and the IOT2L IMC REFL beam camera view was replaced by the IFO REFL camera view.  The hope is that the IFO REFL beam view will allow us to align the REFL beam through the baffle.  I got the beam to clip on the edge of the baffle aperture, and currently Kiwamu is working to improve this alignment.

Unassisted nominal ion pump current on-scale for the past three days -> OK

I have installed the latest PEM models into h1pemey, h1peml0 and h1pemmx. There were some naming errors and the MAG BLRMS channels which were mistakenly added have been removed. The DAQ was then restarted.

The DAC and ADC numbers for the simulink models of HAM2-HEPI and HAM3-HEPI  were adjusted. Models are re-compiled and commited to the SVN.

The ground STS that will help evaluating SEI controls performance on the IMC was wired in these models (STS A). Its readouts initially looked like the sensor was railed. We re-cetered the sensor's test mass by pushing the centering button of its interface. Readouts make more sense now. 

We measured a spectrum of the ground motion with this STS and compared it with the same measurement performed with the STS that is set on the ground at EY. Spectra have similar shape but different amplitude which make sense since the perturbation level is higher in the LVEA during work day (Friday, early afternoon), than it is at EY.

Folder arborscence was adjusted for HAM2-HEPI commissioning. HAM2-HEPI comissioning scripts were created from ETMY templates and added to these folder. Input filters and coordinate transform matrices are loaded. Same operations will be performed for HAM3-HEPI. 

Yesteday, after the MC2 model was replaced, recompiled and burt restored to the settings of the preceeding night, we noticed a change of behaviour of the locking loop. It would no more lock easily with the usual settings, and with the higher gain settings it would trigger an oscillation at 21 Hz that we didn;t observe before. Today Matt worked at re-measuring the cross-over frequencies and re-tuning the filters and we'll write an entry about the changes he made and the new suggested operating settings.

In the meanwhile, I'm leaving the IMC locked for the weekend with mild gains, so to increase the chances of a spontaneous re-lock should an un-lock occour:

- common mode board: common gain at -5 db, compensation enabled, boost disabled, fast gain to -2 (as always)

- MC2: MC3_LOCK filters 5 and 8 engaged, gain to -1000; MC2_LOCK filters 2, 3 and 4 engaged, gain 0.03.

[Cheryl, Giacomo]

A couple of IMC activities were started today and not completed:

- the setup for the measurement of the cavity pole was prepared: using an SR785 signal analyzer, a  swept sine is injected in the "inner loop transfer function input" on the PSL ISS front end on the field rack. The output of one of the ISS PD (A or B, we used the one that is not used int he loop in loop) is taken from the same field rack and sent to one of the channels. A Thorlabs PDA100A photodiode sits on the IOT1 table and is connected to the other channel fo the signal analyzer using one the the (unfortunately currently available) WFS RF cable. The PDA100A is put in the REFL path with the IMC both unlocked and misaligned to measure the relative TF of the two PD. Then it is moved to the TRANS path, the IMC locked, and the measurement repeated. The ratio of the two TF should give the IMC transfer fucntion. A quick measure was taken late this evening, but it still needs to be analyzied (and checked for errors).

- with the goal of computing a power budget, we checked if all the beams were coming out pretty much in the expected positions:

  - the forawrd and backward beams were coming out from their (common) viewport pretty much in the expected positions (they pretty much covnerge at maybe 20 inches from the viewport).

  - the parking beam was not visible, and it seemed to be clipping on the baffle right in front of IM4.

  - IM3 and IM4 also showed to have drifted during pumpdown in pitch and yaw, much more thean IM1 and IM2. Note that bringing them back to the "in-air" positions (as read by the OSEMs) did not make the parking beam reach its target, and apparently spoiled the position of the IM4 forward and backward transmitted beams (they were still coming out of the viewport, but convergin much farther away)

We played with the IM suspensions to try to reroute the parking beam to its intended location, but we started late due to other activities going on and we only got to the point in which the beam is badly clipped by the parking baffle (but at least is visible!). We are not far, but not quiete there yet. We'll resume next week.