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).

1.5 x 10-3 torr at pirani, 4 micron at TC gauge -> will compare TC reading on Monday

Today, in prep for the holiday downtime, I secured the ETMy installation hardware at Ey.  I covered the Class A and B equipment that is parked around the cartridge cleanroom and weld room and I turned off as many lights as I could find switches and plugs for.

J. Kissel, J. Bartlett, A. Ramirez

We've measured the open light currents on the newly cabled up H1 SUS SR2 (with a metal dummy mass), calculated and applied the compensating offsets and normalization gains, captured a new safe.snap, and committed it to the userapps repository. Details below!

--------------
Using the matlab script
/ligo/svncommon/SusSVN/sus/trunk/Common/MatlabTools/prettyOSEMgains.m
the captured open light currents and calculated normalization gains and compensating offsets are

>> prettyOSEMgains('H1','SR2')
OSEM  OLC [ct] Gain     Offset [ct]
M1T1   25985   1.155   -12992
M1T2   26833   1.118   -13417
M1T3   25702   1.167   -12851
M1LF   31475   0.953   -15738
M1RT   25346   1.184   -12673
M1SD   25571   1.173   -12786
M2UL   25576   1.173   -12788
M2LL   27473   1.092   -13736
M2UR   24401   1.229   -12201
M2LR   26282   1.141   -13141
M3UL   26043   1.152   -13021
M3LL   25772   1.164   -12886
M3UR   25342   1.184   -12671
M3LR   24901   1.205   -12451

These were manually installed in the H1:SUS-SR2_${ISOSTAGE}_OSEMINF_${DOF} bank, with ${ISOSTAGE} = [M1, M2, M3] and ${DOF} = [T1, T2, T3, LF, RT, SD] or [UL, LL, UR, LR] for M1 or M2/M3, respectively.

Though Mark has written a nice utility for capturing safe.snaps (see LHO aLOG 5202), we needed to get this done fast, I hadn't used it before, neither Mark or Arnaud are here to help us if it breaks, so we captured the files "by hand" (which is quickest for me), hence:

(1) Turned OFF the masterswitch.
(2) Turned OFF all requested DAC drive (LOCK, TEST, and OPTICALIGN outputs all OFF), other than the damping filter outputs which remain ON.
(3) Made sure the band-limiting filters were engaged in the filter banks preceding the watchdog trigger values.
(4) Captured each suspension's safe.snap, saving over what is in the userapps repository, e.g.
controls@opsws0:burtfiles 0$ pwd
/opt/rtcds/userapps/release/sus/h1/burtfiles
controls@opsws0:burtfiles 0$ burtrb -f /opt/rtcds/lho/h1/target/${ifo}sus${optic}/${ifo}sus${optic}epics/autoBurt.req > /opt/rtcds/userapps/release/sus/${ifo}/burtfiles/${ifo}sus${optic}_safe.snap 
(3) Ensured that the link to target directory (which is where the front end *actually* looks during reboot) was in place, e.g.
controls@opsws0:burt 0$ pwd
/opt/rtcds/lho/${ifo}/target/${ifo}sus${optic}/${ifo}sus${optic}epics/burt/
controls@opsws0:burt 0$ ls -l safe.snap 
lrwxrwxrwx 1 controls controls 63 2013-01-17 12:46 safe.snap -> /opt/rtcds/userapps/release/sus/${ifo}/burtfiles/${ifo}sus${optic}_safe.snap
(4) committed the new safe.snap to the userapps repository,
controls@opsws0:burtfiles 0$ pwd
/opt/rtcds/userapps/release/sus/h1/burtfiles
controls@opsws0:burtfiles 0$ svn commit -m "Installed and captured new open light current gains and offsets." ${ifo}sus${optic}_safe.snap

With the H1 and L1 HIFO X runs approaching, I have revisited and updated the H1 HIFO Y line finding report I gave at the Hannover Detchar F2F meeting in September.  Attached are slightly updated slides with some additional info (mostly on slides 42-44 with a few clarifications elsewhere) on lines found in the transmitted IR light on half-fringe power. Since I neglected to alog the original report, I am including the full report here for reference (both ppt and pdf, to enable future searches for particular frequencies - I hope).

(Alexa, Sheila)

I measured the fiber power from the PSL into the ALS Distribution Box to be 5.65mW which means we have 78.5% coupling to the fiber, which is what we expect. We also calibrated the internal PD in the box -- the responsivity is .33A/W. 

Sheila, Kiwamu

We looked for the POP beam by opening up several viewports on both HAM2 and HAM3. However we couldn't find the POP beam mostly because none of the viewports were in a convenient location to look at the POP path. Also we looked at the swiss cheese baffle with both analog and GigE cameras from the HAM3 spool and jiggled the POP steering picomotor. We didn't see a beam hitting in the vicinity of the POP penetration hole. At this point, we have no idea of where it is stuck.

Sheila and Dave.

Sheila made changes to the following SUS models to add missing IPC channels (the existing models had place-holders for the IPC channels).

h1susbs, h1susetmx, h1susetmy, h1susim, h1susitmx, h1susitmy, h1suspr3, h1sussr2, h1sussr3 and h1sussrm. The model h1susprm had a simple text edit to clean it up.

We discovered an RFM0-RFM1 error on the h1asc and h1susetmy models. RFM0 is the X-Arm and RFM1 is the Y-Arm. I hand edited the H1.ipc file to change ETMY ASC PIT and YAW from RFM0 to RFM1.

All models were compiled and installed, the DAQ was restarted.

IPC data from ASC to SUS-ETMX and SUS-ETMY were tested to verify the RFM0,1 settings were correct.

The latest HPI tools development from Stanford have been installed. They ramp the controls a better way and close the Xterm windows 5s after scripts have successfully completed. I tried it on ITMY, everything worked well.

The LSC demodulator chassis (for ASAIR_A 45MHz, ASAIR_B 18 MHz, ASAIR_B 90 MHz) has been removed from slot 8 in the ISC R3 rack.  This is for executing ECR E1300899, which calls for adding low pass filters to the 2f paths, and high pass filters for the 10f paths.

The plan is to actually modify this AS demod board with the needed POPAIR modifications and test, then do swapsy with the installed POPAIR demod and fix that board for reinsertion into the ASAIR slot.

Hard-close to soft-close GV7, Kyle

Remove yellow covers on HAM2 and HAM3 to look for POP beam, ISC

Look for ETMX ACB PDs through viewports, Richard

Add IPC sends/receives in LSC and ASC models, Sheila

DAQ restarts, Dave

HAM1 POP beam look with IR only glasses (approved), ISC

Flying a camera on the crane, Apollo

Work on EY TMS, Corey, Jeff, Andres

Guardian presentation/training, Jamie

(Andres, Corey, Jeff B, Keita)

Today the TMS Upper Structure was moved from its H2-BSC6 spot to its H1-BSC10 spot.  For the most part it was straightforward, but it should be noted that there are issues with the Alignment Templates (i.e. "cookie cutters") and/or the Overall Drawing (D0902168).

Issue #1:  When we used the called out alignment templates, it was noted that the counterbored holes were not useful, because to match the drawing, we have to flip the Templates over. 

Issue#2:  After we lifted the Upper Mass up to the Cookie Cutter and inspected the position of the Upper Mass, it was apparent we were just under an 1" off!  This was with using the called-out Templates (#23 & 24) at the correct corners.  We ended up switching the template out between corners (i.e. we used a #23 at the location the drawing calls for #24).  This got us much closer to where we wanted to be....not perfect though, we were probably a few millimeters off.

At any rate, the Upper Mass is up & torqued down.

Jamie, Alexa, Kiwamu

We went in to HAM1 this morning to deal with two tasks:

RM TT eddy current damper adjusted

We wanted to make sure the eddy current dampers (ECD) on the tip-tilts (TT) in the REFL paths (RM1 and RM2) were set correctly after we touched them in the previous incursion.  Bram sent us a procedure for setting the spacing, which we followed.  There are four ECDs, two front and two back, on the left and right side of the mirror mount (all in the same horizontal plane):

• check mirror hanging freely (undamped)
• Undo ECD screw locks (lock nut on front ECD and set screw on back), and back out ECD screws
• turn 8-32 ECD screws in until it just touched the coper nub
• back out ECD screw between one (1) and 1.25 turns

The procedure went smoothly, and the TT seem to behave fine after, although we have no rechecked the YAW transfer function.

I'll try to find a DCC for the ECD setting procedure.

POP search

Kiwamu climbed under HAM1 to wriggle over to the north side of the table to try to find the POP beam coming out to the POP periscope.  Unfortunately he wasn't able to find anything, using both an IR card, a viewer, and I clean wipe.  We suspect the beam is either not coming through the swiss cheese baffle, or is being lost in HAM3

Preparation for opening to X-end - Monday?

Found IP5 not pumping effectively due to improper settings -> nominal settings for nominal pressures not -6 torr environment -> changed "Imax" value from 10mA to 200mA and "Pmax" value from 50watt to 200watt -> Ok now

(Anamaria, Kiwamu, Chris)

We're gradually converging on a shared LSC model for L1 and H1. Here's what we have in place on H1 so far:

• New library parts encapsulate all top level blocks in the LSC model (LSC, PSL, IMC, ALS, SYS).  See lsc/common/models in userapps.
• There are also new library parts for the LSC sensors (to handle their signal conditioning and power normalization), for the dynamic power normalization logic, and for the lockins.
• An unused set of per-sensor static power normalization factors was removed.
• Static power normalization of REFL_SERVO_SLOW was removed.  Also, the IMC row and the REFL_SERVO_SLOW column were removed from the dynamic power normalization matrix.  (All of these things will be normalized using the gain sliders in the common mode and IMC boards.)
• IPC outputs to the ASC model for SPOP and SASY are now statically normalized.  Another set of IPCs that sent POPAIR_B to ASC were removed, since they appeared to be redundant.
• The switches that enable a SQRT calculation for SPOP and SASY were moved inside the dynamic power normalization subsystem, so their channel names changed. (Example: LSC-SPOP18_SQRT_SWT -> LSC-POW_NORM_SPOP18_SQRT_ENABLE)
• An initial set of channels was selected for science frames.

In addition, we experimented with -- but eventually reverted -- a variety of approaches to organize and simplify the 7x34 LSC input matrix and the other LSC matrices.  (It seems that we need to develop a new RCG matrix part if we want to make significant improvements here.)

The model, libraries, and MEDM screens have all been updated in the SVN.  However, the L1-H1 merge is still ongoing.  One remaining stumbling block is the readout of the FSS_RFPD channel in the PSL top_names block. (This was introduced to the LSC model long ago as a temporary hack, and we're still laboring to get it moved to a PSL model where it belongs.)

TF crashed (watchdog trip) last night at 6pm local. Very weird. The attached plots show the details. First plot shows all the excitation channels for a 3 hour period around the watchdog trip, you can clearly see where we were driving at ~3000cts on each exc channel (this wasn't happening at the exact moment of the trip. The second plot shows the V4 excitation channel and the V4 L4C that tripped over a 100 second window. There is a very low drive, but  high frequency excitation that does not look like the other parts of the transfer function being run at the time. But, this excitation is also roughly at the same time as when we were driving on a different (H1) channel.

Fabrice was able to copy the signal from the V4 excitation channel at the time of the trip and send it again with some matlab trickery, but we saw nothing on any of the chamber's (HEPI, ISI, SUS) sensors. So we still don't know what caused the trip. Weird.