Betsy, Travis

This afternoon, we swapped the metal MC1 dummy mass out and replaced it with the IMCF09 mode cleaner flat optic.  Using the auto optical lever to look at the prisms on each side, we set the roll of the mass to within ~0.1mm.  We then noticed a small pitch error by eye which we corrected for using the top mass sliding pitch mass.  This brought the 6 top BOSEMs back into range, as set during the build phase across the street.  We'll continue to tally and align all 6 DOF errors tomorrow.

JimB, DaveB, HugoP,

HAM3-ISI used to have temporary medm screens for payload state monitoring. We rebuilt the HAM3-ISI model with a call for the create_hamisi_payload post-build script. This script automatically creates unit-specific medm screens for payload state monitoring. The call for create_hamisi_payload was set in the block properties of the HAM3_PAYLOAD block, in the simulink model of HAM3-ISI (see attachement #1).

We did the same for HAM2-ISI.

make install would then return an error due to issues with CDS. These issues were corrected.

I updated the HAM-ISI overview screen so it automatically points to the new payload screens. The unit-specific payload monitoring screens now work for both HAM2-ISI and HAM3-ISI (see attachement #2)

I removed the shutter alarms from the PSL alarm configuration file and added alarms for the power watchdogs on the amplifier and oscillator.

We almost have the 6th of eight Actuators in place.  We had to make a few mods to brackets given the large translation East for this platform.  These last attachments should finish mid-morning.

Updated the userapps-user-env scripts on h1, then modified perl environment setup scripts to correct errors of looking in the wrong directory.  This was done to support post build scripts.

• Snovalley, Ace porta-potty, UniFirst, Paradise water, fire department on site
• One LN2 delivery to CP5 today
• Ski at MY checking on equipment
• Kyle at EY looking for pump cart
• Filiberto at HAM2 pulling cables

Noticed IP11 and IP9 were still outputting 5000V even though their surrounding pressures were < 1 x 10-8 torr -> Made slight corrective adjustments to the pump current values at which point these pumps switch from 5000V to 3000V outputs.  As found, they were programmed to change at pump currents of 5 x 10-5 amps.  This value of current corresponds to a pressure which is lower than 1 x 10-8 torr which is the point they should be switching to result in the most efficient pump speed.  The new value is 1.5 x 10-4 amps.  

Restarted all models on h1seih23, h1sush2a, and h1sush34 to clear timing issues for the IOP models and to restart dead models.  Appears as if the dolphin network got glitched due to front-end computer restarting without being disconnected.

For the 200W beam. The modescan script could only get 8 seconds in before it crashed.

Attached are plots of dust counts > .3 microns and > .5 microns in particles per cubic foot. The data was taken from approximately 5:30 AM to 5:30 PM.

Hugh, Jim, Hugo,

We measured the level of stage 1 this morning. Results are attached. Stage1 appeared tilted by ~170 µrad. This result is beyond the 100 µrad of the acceptance criteria used during the assembly-validation phase.

We recently changed the shim thickness on locker D. In order to make sure that it is not the cause of the mis-levelling, we measured the level on stage1, just above the locker D when the ISI is locked, and compared it to the same measurement when only the locker D is unlocked. The shift in level is less than 1mil. Hence, the adjustement we made on locker D is not the cause of the mis-levelling we observed.

Changing the shim of locker D is the only serious mechanical modification we made on HAM3-ISI after the suspensions (MC2 and PR2) were approved. We then conclude that the suspensions were tested under the current configuration without being affected by it in a noticeable manner.

We measured the level of stage 0 around the lockers. We did not detect such a mis-levelling there (see attachement).

The assembly validation testing is performed with a ~600lbs pounds on top of the ISI. The mass distribution is very different now that the ISI is loaded with suspensions, optics, and 10kg masses. We currently suppose the new mass repartition would have affected the flatness of the optical table, and thus the level measurement which is performed along its edges.

  Jeff B & G2

  We released the Intermediate Mass EQ stops on MC2 and PR2, so Seismic can continue testing the HAM-3. All masses on both suspensions are now free.  

And with that HAM2 is ready for HEPI Actuator Attachment.  After the Dial Indicator installation, the HEPI was unlocked, very little motion was measured with the DIs.  I did Caging Brace/F-Clamp adjustments and will commence actual Actuator attachment tomorrow.
HAM1 HEPI was locked before ISC installs Thursday and remains locked.

Please be mindful of the DIs on the HAM2 Support Tube Ends.

Mitchell & I completed the loading of the Optical Table with the Trim Mass & Damping Assemblies D1003161 as per D1001989.  I believe that puts that 'Cartridge' back in SUS/IAS hands.

Restarted the h2nds1 computer.  The computer could be pinged but could not log in remotely or at the console, and the nds process was not responding.  

h2nds0 also died over the weekend but was restarted.

Cheryl, Rodica

Last Friday we finished the isolation measurements for powers up to 133 W. As we increased the power, we optimized for isolation ratio at 450 mW, 4.70 W and 20 W from the half waveplate and adjusting the pitch/yaw of DKDP, and for powers higher than 20 W we only finetuned from the waveplate's picomotor screw. We measured incident and REFL (using the same water-cooled high power power meter Ophir L250W-SH-ROHS), transmitted (Ophir L300W-LP), forward rejected and isolation beams. 

The results are:

At maximum power we readjusted the orientation of DKDP, returned to 20 W and reoptimized for isolation, and repeated the measurements increasing again to 133 W. Thermal depolarization was higher, but the isolation kept within same levels.

Cheryl took pictures of the DKDP under 140 W incident power with the IR camera, and shows serious scatter on the defects observed predominantly on one side. We will be installing the Faraday with this DKDP piece, but new ones are being purchased to installed at a later date. Picture attached.

We lost chiller 2 at Y end station today, because of an electrical problem.  I have started chiller 1 and the temps are returning to normal.  Richard and John have been notified 

Mark B and Jeff B.

After today's electronics and computer issues, we restored settings on MC3 and started running Matlab TFs at around 13:20 PDT. We started with damping on and will repeat with damping off this evening.