Mark B and Arnaud P.

We took DTT transfer functions on M0 and R0 of ITMy:

^/trunk/QUAD/ITMY/SAGR0/Data/2013-01-24_1300_H1SUSITMY_M0_*_WhiteNoise.xml
^/trunk/QUAD/ITMY/SAGR0/Data/2013-01-24_1300_H1SUSITMY_R0_*_WhiteNoise.xml

Main chain looks very good. Reaction chain is a bit messy but very similar to previous measurements from when it was H2 ITMy.

Next step is to work with IAS to set the pitch of the main chain.

Connected the fluid filled lines today, on the installed BSC9 actuators, to the valves connected to the piping.  The now fluid filled valves have not been opened to allow fluid into the piping yet.  

Kyle, Gerardo 

continued from yesterday...

SW bellows small conflat -> OK 
NW bellows small conflat -> OK 
SE bellows small conflat -> OK 

Demonstrated that the NE bellows leak was coming only from the large conflat joint -> Re-torqued (4 passes) and fixed leak for now -> Feels like an annealed gasket -> will need to recheck tomorrow

The LVEA now sits in laser hazard.  Cheryl anticipates that this status will remain through the night.

• Filiberto swapped a power supply in a H1 IO chassis this morning that brought H1SEIH23 back on line.
• Dust15 alarms:  9:52 AM, 10:53, 11:03, 11:43
• SUS and SEI alarm at BSC 1 this morning due to SEI work
• Operator CDS workshop in the control room at noon
• Laser safety makeup this afternoon

Work permits signed by ops today:  3683 (MC power budget), 3682 (4-hour CDS shutdown next Tuesday for timing network and power distrubution updates).

The crossover platform and ladders over the X-arm were removed from the LVEA, and 9 of the cable tray supports installed along the X-arm. The Apollo crew also started assembly of the  (terra universal) clean room intended for fiber welding. Disassembly was started and halted on the garbing room near the north end of the south bay. Reassembly of said garbing room is ongoing.

The Apollo crew uncrated and wiped down parts of the cleanroom donated to LHO by CIT AOS. (This cleanroom will replace the cleanroom used for Fiber Welding near the Test Stands in the West Bay.)The parts were transported to the West Bay and frame assembly started. The cleanroom will fit into the space occupied by the previous cleanroom with about a foot to spare. Tomorrow, work will continue with ceiling assembly.

Measurement of the mode cleaner power budget this afternoon will cause beams to exit the viewports on the top and the east side of HAM 2.  Access along the east side of the mode cleaner tube will be restricted.

The FMCS computer in the Control Room was down from 12:48 till 13:08 today for maint.  The system is back up and running again

Got the go head from IMC folks and SEI.  Locked up the HAM3 HEPI.
The largest displacement see from unlocked to locked condition is 300 cts or 0.0005".  The runout of the vertical shift is only 140cts so max tilting of the table is only a couple urads.  I see a similar change in the yaw position.  In conclusion, alignment should be very little affected.

late entry for wed afternoon restarts

h1peml0 was restarted to test the Id revision string substitution when the mdl file is committed to SVN.

h1ascimc model was changed to remove the WFS A,B WHITEN GAIN parts as these channels are now controlled by the Beckhoff slow controls system.

DAQ was restarted because of the ASC IMC change, it then used the modified ini files for the BSC HEPI systems. So h1hpiitmy and h1hpietmy models were restarted to load the latest code from Vincent.

We went in chamber this AM, locked up the ISI and did a level check with the Optical Level.
The run out 0.2mm over the 1.5M Optical Table gives a level of 133urad.  The numbers would suggest though that we are at the limits of the Optical Table Flatness.  That is, the SE and NW corners of the Optical Table are low and the opposite corners are high.
SUS is going in now to confirm no rubbing to insure the YAW evaluation is not suspect.

***The ISI Remains Locked***

At 9:22:13 UTC Jan. 24, the models on the h1seih23 computer stopped running.  All models reported ADC timeout.  Checked I/O chassis, power switch was on but found no indication of life.  The I/O chassis refuses to power up, even after disconnecting the DC power and reconnecting.  Suspect I/O chassis power supply is bad.  h1seih23 is powered off for now.

Praxair arrived at 8:00 to make a delivery to MX.

Forgot this what with the BSC1 work.
Yesterday between ~10M & Noon, I locked down the SW HEPI Foot and leveled the two L4Cs.  This concludes the L4C leveling on the HAM.  When done, after releasing the Foot, the largest change to the Inductive Position Sensor readings was ~400 cts or ~0.0007".  This was a horizontal.  I doubt it will be noticeable.
SEI would like to lock up this HEPI.  Since there is no HEPI operation at this point, the unlocked HEPI shows resonances that would nominally be suppressed.  With approval, SEI will lock this today.  WHAM3 remains locked but there are still three corners to level there which will mean it will be unlocked, again, when the IMC crew can tolerate the mild disruption.

All

The repaired LSC RFPD has been re-installed on IOT2, and we could relock the IMC easily. We measured the OLTF of the fast loop: we have a 60 kHz UGF and 40 degrees of phase margin (measured with the  730 kHz notch ). Details will follow. 

Attached are plots of dust counts > .3 microns and > .5 microns in particles per cubic foot from approximately 5 PM Jan. 22 to 5 PM Jan. 23. 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.

We checked the grounding of WFS and LSC cables to the table.

Disconnected the cable from the DC interface and checked if the ground pin on the cable was connected to the ground pin of the DC interface, and they were not.

Then we went to the table, disconnected the WFS cable from the feedthrough panel of the table, connected a DB15 cable to the feedthrough and locally supplied +-18V from a power supply.

No oscillation was observed, but none of the channels in WFSA was responding to the light. For WFSB, segment 1 and 2 (pin4-12 and pin3-11)  were good, positive output of the segment 3 (pin2) was dead but the negative output (pin 10) was fine, and the segment4 (pin1-9) was dead.

We removed the heads from the table and opened them to find that:

For WFSA, in 3 segments AD8599 (U1 in D1101614, that's the dual opamp for the differential output stage) was blown up, and the remaining one segment had a fried AD8597 (U2, that's the trans impedance amp before the differential stage).

For WFSB, only one segment had what seems to be a fried AD8597.

Pictures will be posted by Lisa or Giacomo.

We don't know how these things were broken.