ITMY M0 to M0 and R0 to R0 transfer functions have been running over the weekend for phase 3b testing

The attached documents are showing comparisons between :

• "wirerehang" model in blue for M0/ "thincp" for R0
• undamped phase 3a january 2013 with ISI locked in orange
• undamped phase 3b may 2013 with ISI damped in black
• damped phase 3b may 2013 with ISI damped in pink

Most of the transfer functions are in good agreeement with model and previous measurements. Similarly to Mark's comment for phase 3a testing on aLog 5304, there's a discontinuity at 0.4Hz on the main chain TF in vertical and roll (page 3 and 4 of first pdf), probably due to a measurement artifact. A dtt measurement will be needed to confirm it.

scripts and data have been commited to the svn

Per WP3934, I put the BSC1 HEPI Actuators in Run or Operational Mode.  This entails closing the Fluid Return and Supply lines at the chamber, closing all the bleed valves on the Actuators and then opening the exit valve for the wheatstone bridge.  This is the operational state for the HEPI Actuators.  I saw a 2 to 4 mil drop of the IPS readout for the vertical actuator when the supply & return valves were closed (pressure drop at Actuators).  The Horizontal actuators 'retracted' about 1/2 to 2/3 mil.  These moves did not come back when the pressure was returned.  The Crossbeam Foot is locked and these numbers may recover at that time, we'll see.
We'll stay in this state for a day and when permissible, unlock the Crossbeam Foots and continue with commissioning.

I took over for Justin in the early afternoon.

Cheryl to end X transmon lab
Corey to squeezer bay to work on table enclosure
Hugh to switch HEPI actuators at BSC1 to Run Mode
Cheryl to end Y transmon lab

I started the new IOC for the dust monitor in the H1 PSL diode room. It is running but the data is not being acquired into the frames yet.

[Mark, Arnaud, Hugo, Cheryl, Kiwamu]

Here is our understanding of what happened on the MC1 suspension in this past Friday (alog 6591) although it is still unclear why there was a big offset in the T1 coil.

(1) Suddenly a big offset (-10 k counts ) showed up in the T1 coil (VOLTMON) which wasn't requested from the MC1 suspension model (DAC_OUTPUT_0_0).

(2) The M1 stage was pushed by ~ 10 k counts in OSEMINF_T1_INMON due to the offset. This was visible in the IMC-REFL_DC camera when I was in the control room.

(3) The DC change in the M1 stage then triggered the IOP DAC _KILL because the DC value hit the threshold of 10,000 counts.

(4) Tripping the DAC KILL somehow disabled the unknown offset too and hence it released the M1 stage with a big kick. Consequently an undamped oscillation was observed.

After this every time I untripped the watchdogs, the unknown offset persisted and kept tripping it.

Thomas and I looked at 3 different optical lever setups in the LVEA.  These are oplevs that are already installed and working.  I believe we looked at  the oplevs for PR3, HAM2, and ITMY.  My goal was to see the hardware as it looks installed on a real IFO.  I would recommend we look at ways to rework the housing for access to the hardware.

Here is the status of the BSCs for HIFO-Y

HEPI - BSC6:
- HEPI unlocked
- HEPI pump running with the new servo pump controller
- Control loops for position control 100mHz & 5Hz - Currently (since May 30, 2013) controlled in position (UGF: 100mHz), for ISC work.
- Blend filters at 800mHz + control loops 10Hz + Sensor correction

ISI - BSC6 (https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=6391):
- Damping filters installed
- Blend filters at 250mHz - 750mHz both stages with T240 on stage 1
- Isolation filters Level 1 installed: UGF-15Hz
- Isolation filters Level 2 installed: UGF-25Hz
- Isolation filters Level 3 installed: UGF-40Hz stage 1 + UGF-32Hz stage 2
- Sensor correction both stages (STS-2 to stage 1 and T240s to stage 2 - No HEPI-L4C & STS-2 blend not implemented for the moment)
- Feedforward HEPI to stage 1 needs to be re-installed (worked few months ago)

HEPI - BSC1:
- HEPI locked
- Actuators bleeding

HEPI - BSC2:
- HEPI locked
- Actuators bleeding

ISI - BSC1 (Waiting for HEPI to be in a running state to go further - HEPI Locked -> Resonances seen by ISI):
- Damping filters installed
- Blend filters at 250mHz - 750mHz both stages with T240 on stage 1
- Isolation filters Level 1: 15Hz

ISI - BSC2 (Waiting for HEPI to be in a running state to go further- HEPI Locked -> Resonances seen by ISI):
- Damping filters installed
- Blend filters at 250mHz - 750mHz both stages with T240 on stage 1
- Isolation filters Level 1: 15Hz

Ground Instruments
- STS-2 at EY hooked up
- STS-2 in the beer garden hooked up
- STS-2 of the input and output arms on site but not hooked up

Models ISI: All ISI models are ready for the sensor correction with HEPI-L4C - STS-2 blend but they don't have the cartesian "smooth steering" capability yet.

Here is the current status of the aLIGO SEI work regarding the HAM chambers. Everything in bold is to be completed for HIFO-Y. Everything in red is a change from last week's status. Everything in green is available.

·         HAM 1

o    HEPI: To be commissioned, currently locked
       Electronics and cables ready

·         HAM2

o   ISI: previously commissioned with HEPI locked (recent performance spectra), currently unlocked, in vacuum

o   HEPI: to be commissioned, currently locked, models and electronics ready. Commissioning could starts once the IMC locks again.

·         HAM 3

o   ISI: previously commissioned with HEPI locked (recent performance spectra), currently unlocked, in vacuum

o   HEPI: To be commissioned, currently locked, model and electronics ready. Commissioning could start once the IMC locks again.

·         HAM 4 

o   ISI: In chamber, Previously tested during assembly validation, currently locked, no suspension installed, in-vac cables not connected, chamber temporarily closed.
     Electronics ready, in field cables ready, in-rack cables 90%

o   HEPI: Currently locked, to be commissioned
     Electronics ready, in field cables ready, in-rack cables 90%

·         HAM 5

o   ISI: In Chamber, Previously tested during assembly validation, currently locked, no suspension installed, in-vac cables not connected, chamber temporarily closed.         
    Electronics ready, in field cables ready, in-rack cables 90%

o   HEPI: Currently locked, to be commissioned     
     Electronics ready, in field cables ready, in-rack cables 90%

·         HAM 6

o   ISI: in a container. Need to be retrofitted with aLIGO censors (GS13, CPS) and to receive a new set of Actuator Cables. Cables and inertial sensors will be tested prior to installation. All this will happen chamber-side prior to installation in chamber. Commissioning will follow.
    Electronics and cables started, the rest is ordered

o   HEPI: Currently locked, to be commissioned
     Electronics ready, in-rack cables 90%

There was not so much progress on the IMC WFS commissioning yesterday.

From the late evening MC1 started tripping for some reason and this prevents the IMC from locking stably. I made a contact with Arnaud and Mark.

Besides, I re-adjusted the demod phases of WFS_A and WFS_B again. This time I rotated the phase of some of the segments by 180 deg such that all of them shows the same sign in the error signal of the IMC length. This resulted in a more sensible response in WFS_A (e.g. shaking pitch of MC2 gives pitch signals in WFS-A). I didn't get a chance to look into WFS_B yet.

Attached are plots of dust counts requested from 5 PM May 30 to 5 PM May 31.

The dust monitor at location 14 in the LVEA (H2 PSL enclosure) is indicating a calibration failure.

After 45 minutes or so, GV5 "cammed" closed -> As such, I went ahead and valved-in the YBM MTP for the weekend.  

For future reference;  use 5-10 psi for GV5 soft close instead of 10-15 psi (each pneumatic valve is unique, observed range varies between 15-25 psi to cam close)

Quick work inside the LVEA – Richard
Viewport camera work at BSC6/BSC10 End Y – Jax/Alexa
Work on Luminator at End Y – Filiberto
Work around the site – Fire Department
Restart of all LVEA Dust Monitors - Patrick
Quad work (LVEA) – Betsy
Door Handles Replacement at End Y – Michael R.
GV18 Soft-close at End Y – Kyle
GV5 Soft-close at Corner Station – Kyle
LVEA Transitioned to Laser Hazard – Cheryl
H2 PSL minor work (LVEA) – Pablo
Trip to End X to put a sign - Patrick

(Jax, Alexa)

We have initial alingments for TMS-Y, ITM-Y, and ETM-Y. The green light from the TMS was observed at ITMY, the reflected light from ITMY was observed at ETMY, and light was returned from ETMY to ITMY.

The initial pointings in (P,Y) convention:

TMSY - (-14400, 9170)

ITMY - (246.0, -275.0)

ETMY - (-140.0, 198.0)

Locking attempts to follow?

For the 200W laser

There is a broad peak at 4kHz in the ISS rpn plot which appears in the 200W laser's rpn plot as well. For comparison, the last time I took these plots for the 200W laser as 10/30/2012.

Attached are plots of dust counts requested from 5 PM May 27 to 5 PM May 28.

Attached are plots of dust counts requested from 5 PM May 28 to 5 PM May 29.

Attached are plots of dust counts requested from 5 PM May 29 to 5 PM May 30.