HAM2-HEPI was using BSC-HEPI coordinate transform matrices. HAM-HEPI commissioning will be starting soon. These matrices are needed to track HEPI's potential shift(s) (e.g. initial release, pumps restarted, ...).

930-1600 Michael R and Oliver P working in H1 PSL enclosure all day. The high power oscillator is enabled and beam is currently being dumped on the PSL table
1000 Thomas working on OpLev near HAM 3
1005 Arnaud running excitation on BS (BSC2)
1030 Filiberto and Aaron dressing cables at HAM2
1315 Pablo working on photon calibrator in H2 PSL enclosure
1400 Cheryl and Joe inspecting 1064 input viewport on HAM 1  (WP#3859)
1450 DAQ restart by Dave B
1516 Tyler working with Cheryl on modification for IOT2L

- ChrisW, Keita, Kiwamu, Cheryl, Corey (yesterday)

IMC locked today with the alignment of last night.  Before this happened, Kiwamu had to set the phase using external switches on the Beckoff.  Using 100mW of power from the PSL, REFL DC unlocked = 200, and locked was ~20-ish.

A search for MC TRANS turned up nothing, so I increased the PSL power to the January value of 250mW.  This increased REFL DC to about 500.  This also helped Chris and I find the MC TRANS beam hitting the bellows to the +X side of the aperture of the table enclosure by about 2.5 inches.

To check the IMC and MC TRANS alignment, I looked at the beam downstream of MC3 at the  input to the FI, which showed no sign of clipping, and there was no sign of clipping on the baffle in front of IM4, AOE2.  The REFL-to-HAM1 baffle showed only a slight amount of clipping, with no adjustment to PRM , so alignment behind the IMC looks good, and does not explain MC TRANS.  The only explanation is that the MC TRANS 2" steering mirror was bumped out of alignment during the vent.

The solution is to make a new back pannel and shift the MC TRANS optics on IOT2L by about 2", to the new beam.  There is realestate on the table to do this.  Moving the entire table to capture MC TRANS  isn't an option, as it would cause MC REFL. to clip on it's baffle.

IMC locks show a lot of satability, and the IMC relocks easily.  At 250mW PSL power, IMC visibility was around 90%.

After our work on MC TRANS, Chris worked on WFS - see his alog.

I made a DC calibration of IMC WFS A and B using an Ophir power meter and the IMC reflection beam.  Both give about 1100 ct/W.

Details:
* Both PDs had been left unplugged at the rack and their interface chassis was switched off.  So I connected the cables, powered them up and then centered them manually looking at the DC settings screens.
* Both gain switches on the front panel of the interface chassis were set to "LOW".
* There is currently a small ghost beam headed toward WFS A (appears to be created by its pickoff mirror).  I dumped that beam on a card for this measurement.

Data:
WFS A, measured input power 1.4 mW

 controls@opsws6:~ 0$ tdsavg 15 H1:IMC-WFS_A_DC_SUM_IN1 H1:IMC-WFS_A_DC_SEG1_IN1 H1:IMC-WFS_A_DC_SEG2_IN1 H1:IMC-WFS_A_DC_SEG3_IN1 H1:IMC-WFS_A_DC_SEG4_IN1
 1553.5
 -438.585
 -353.511
 -350.708
 -410.694

WFS B, measured input power 3.0 mW

 controls@opsws6:~ 0$ tdsavg 15 H1:IMC-WFS_B_DC_SUM_IN1 H1:IMC-WFS_B_DC_SEG1_IN1 H1:IMC-WFS_B_DC_SEG2_IN1 H1:IMC-WFS_B_DC_SEG3_IN1 H1:IMC-WFS_B_DC_SEG4_IN1
 3507.9
 -1087.05
 -721.106
 -913.896
 -785.855

I ramped up the speed/pressure at EndX.  Running the motor at ~92% gives 48psi at the pump station output.  We will get the Servo on the system next week.  The system will shut down if the fluid level drops even  slight amount.  Meanwhile, scrub scrub scrub away!

WP 3852. I started the h1iopsusauxey model (it has a new name) this morning. The DAQ frame writers were stopped and the minute trend files associated with this model were renamed. The DAQ was then completely restarted. I made a simple "hostname" change to h1susauxb6.mdl to permit the users model to run. This model will be converted from B6 to EY on monday.

08:45 Cable work by HAM 5 (LVEA) – Filiberto C.
09:30 Work on H1 PSL Mode Cleaner - Sheryl
10:00 Work on PR3 Optical Lever (LVEA) – Thomas Vo
10:10 Turbo pump/pump cart work by BCS8 – Kyle
12:40 Work on Quad/BS test stand on LVEA – Travis/Betsy
13:00 Continue work on H1 PSL Mode Cleaner – Sheryl
14:30 LVEA Transitioned to Laser Hazard - Keita

Modified capacitive position sensors per E1300251 for BSC6 and BSC1. This was to address a high frequency oscillation in the return path.

Thomas V. & Szymon S.

The ETMY optical lever channel H1:SUS-ETMY_L3_OPLEV_SUM_OUTMON shows that the laser power on the optical lever receiver has been fluctuating - dipping to zero on a regular basis.  I tried installing a spare power supply on the laser, and it appears that the power fluctuations are still occurring, but the power now only drops down to about 6000 counts from 10000 on a regular interval.

I also centered the yaw using the translation stage controller after the signal had drifted to nearly -6 counts after a week.  The plots show the ETMY_L3_OPLEV_SUM_OUT and pitch and yaw signals around the time the power supply was exchanged and the yaw centered.

For the 35W beam

Cyrus R., Patrick T., Sheila D.

Around 11:00 AM we powered down the H1 Corner MSR EtherCAT chassis and put it back in the timing rack. Cyrus replaced the 24 V power cord that did not appear to be put together correctly, but should not have affected the power. The cover is still off and it is powered back up.

Looking at the C:SlowControlsTargetH1ECATC1H1ECatC1.tsm, there are 14 Cyclic lost frames and 504 Queued lost frames for Device 1. These numbers are not changing so I am clearing them.

Filled this system this morning and it is now flushing in manual (no servo) at ~20psi.  Fluid is circulating though the 4-way (re-circulation position) valves; the Actuators are not valved in.
Manual mode means only the fluid level is monitored.  The pump will shut off if the level drops.

Patrick T.

This evening, sometime between 7:00 and 9:00 PM, I found the cover replaced on the Corner MSR EtherCAT chassis. It is labelled with serial number S1103490 and is on a cart near the back of the network timing rack in the MSR. I had left the cover off because I was afraid that it was pinching the fibers inside, and might be causing communications errors that I had seen earlier. I had replaced the orange multimode fiber going into the EK1521 terminal when these errors last occurred, and that had appeared to fix them. That was the second time I had replaced that fiber. The first time I had replaced the EK1521 terminal as well, which had serial number 20110311 and was put it in a box labelled 'broken? 4/8/2013'. I believe that had also appeared to fix similar errors at the time.

I removed the cover. Looking inside I found that part of the top of the white flexible connector on the multimode fiber labelled 'B' going into the EK1521 terminal, was broken off. This appeared to have been done purposefully. The other fiber of the pair, labelled 'A', appeared to be slightly split at the top. The temperature probe that had been placed inside the chassis had also been put outside. The cover would have been closed on its wire, but not too tightly, as it was not screwed down. I am leaving the cover off for the night and the rest of the chassis as I otherwise found it.

Attached are plots of dust counts requested from 5 PM May 1 to 5 PM May 2.

WP 3852

I started working on the renaming of the EY front ends to replace the BSC number identifier (B6) with EY. As a test case I started with h1susauxb6 because it was not being used, had no fast data in the DAQ and has no IPC parts (Dolphin or RFM).

I was successful in renaming the computer and changing the h1iopsusauxb6 model to h1iopsusauxey. I have documented all the steps in the cds wiki.

The last part is to rename the DAQ minute trend files and restart both frame writers. Since it is getting late I'll not do that today and continue tomorrow. For now the EDCU is PURPLE because I've stopped all models on h1susauxey.

- Fire department on site - Richard M.

- IT Tech on site - Jonathon H.

- IO work at ITO2L, laser hazard only within the black curtains - Cheryl V.

- BSC1 capacitance work on position sensors - Filiberto C.

- Restart SUSAUX - Dave B. 

Flashing, but REFL PD not working and can't see TRANS with green glasses and green viewer.

IMC alignment:

MC1
P 365
Y -875

MC2
P 405
Y 220

MC3
P 107
Y -1054

PSL shutter is closed for the night.

Max, Sheila

Coming to the fiber distribution box 2.98 mW (Kiwamu measured 4.7 April 11th)
Y end output of fiber dist box: 190uW 
input to polarization adjustment box (MPC1) 190uW
output of polarization adjustment box 80uW
output at end station: 14uW

this is worse than on monday.  

By removing the polarization adjustment box and replacing it with Richard's fiber adapter, we saw 40uW at the end station, with only 3 uW in the wrong polarization.  Maybe we will leave the polarization box out of the picture for now.  

Ryan Fisher, Stefan Ballmer

We have set the EPICS records for the labels that describe the ODC bits for the SUS and ISI models currently running in H1.*  The labels provide a short description of what every bit in each ODC channel represents, for each ODC channel.  The higher order bits in the ODC channels that do not have labels are currently unused, but may be used in the future.

These records were set using scripts located in /ligo/home/ryan.fisher, and attached to this entry.  

* Excluding H1:SUS-TMSY_ODC_BIT* for now.