The external epics gateway is still running, I am able to report CP levels are good:

HVE-LY:CP1_LT100               91.5751

HVE-LX:CP2_LT150               92.5519

HVE-MY:CP3_LT200               90.9646

HVE-MY:CP4_LT250               91.6972

HVE-MX:CP5_LT300               91.5751

HVE-MX:CP6_LT350               91.5751

HVE-EY:CP7_LT400               92.7961

HVE-EX:CP8_LT500               91.3309

I'm noticing a possible problem with h1boot, the NFS server of the /opt/rtcds file system. Machines which mount this file system are not letting me log in (they freeze after accepting my password) and h1boot is not responding to ping requests.

The disk-to-disk backup of h1boot at 05:00 this morning completed normally at 05:04. MEDM snap shot images suggest the problem appeared at 06:42 this morning.

As Kyle mentioned in his alog of Friday he is running an accumulation measurement in Y1. Alarms were expected as the pressure rises in the module and this morning we have them. Pressures are at 4e-8 so there is no cause for worry. The rate of rise is close to 1e-8 torr per day. Monday this measurement will be terminated if all goes well.

model restarts logged for Sat 22/Mar/2014
2014_03_22 12:33 h1fw1

unexpected restart of h1fw1.

HEPI TFs compete, ISI tripped from damping during but SUS & TMS good.

ISI TFs now started on opsws1.

(Sheila, Daniel)

We used the normalized PDH signal to feed back to the additive offset of the common mode servo which in turn moves the mode cleaner and the laser frequency. The loop bandwidth was 20Hz with a 1/f shape. This kept the red laser light on resonance in the arm cavity for good. We then swept the offset of the normalized PDH error signal to scan the cavity resonance. The attached plot shows the sweep. It took about 20 seconds. The FWHM as measured by the red transmitted light corresponds to 49.7 units. However, it should be 165Hz. The calibration factor was set to 0.208 (from 0.063).

Aidan, Dave H.

We thoroughly wiped downThe CO2PX table and enclosure today. Most of the plumbing is installed - we're going to connect the laser and RF driver and test for leaks on Monday.

The chiller and CO2 laser current and voltage calibrations have been applied to the H1TCSCS front end model. I recorded a safe burt restore snap with these calibrations and the chillers set up to 20C. 

The L1-TCS-R1 rack was installed in the HAM4-BSC2-BSC3 vertex and a cable tray was run to it.

We're getting a large shipment of the remaining CO2P equipment on Monday.

We removed all ISC cables from the J-clips, inserted PEEK tubings for a better protection against the edge of the clips, and changed the clips such that two clips securely hold each cable. Thin cables and thick ones needed somewhat different treatments but in the end everything was fixed securely. Corey should have taken before/after photos.

This changed how the cables were routed to the top, and thus changed the PIT and YAW, but it turns out that we didn't have to rebalance anything, just a little push from bias slider was all it needed (15 urad in PIT and 70 in YAW or something like that).

We checked that all picos work.

We checked that beam diverter reed switches work. However, open/close logic seems to be reversed in Beckhof.

We centered BOSEMs and set the depth according to the offset that were already put in. Supposedly these offsets are half the open value that were measured at some point.

There is no apparent interference.

Two Matlab sessions on opsws0--please avoid this if possible.

Please log entries into the End Station--likely won't bother the TF as long as you don't bump anything and trip things.  If you see the ETMY QUAD, HEPI or ISI, tripped please give me a call so I can restart these this weekend.  I'll be in to start ISI TFs but the sooner the better.

Though not likely-depending upon the alarm values used for Y1(?)-PT124b and/or PT243B could alarm (RED) at some point as the result of the pressure (monitored) increase in the Y1 BT module before this test is complete.  If so, no action is required.

Jeff spelled me for the morning so I could do EY TMS work (Thanks, Jeff!)

EY Work:

TMS final tasks completed at lunch today.  In the afternoon the traffic jam starts:  Pcal camera alignment check, B&K Hammer tests, Jax working on ISCT-EY table.  Jim is waiting to unlock the ISI & start TFs.

Here are the days activities

• EY TMS close out was completed at noon!
• Chris, Dave, Gerardo working in H2 PSL Enclosure
• Luis doing inventory work at end stations
• Betsy/Margot working at LVEA SUS Test Stand
• Aaron/Luis running cables around HAM4/BSC2
• B&K measurements for EY SUS & TMS (Arnaud)
• Jax working on ALS Table---prefer QUIET!
• Output Faraday Isolator (OFI) work in H2 PSL Room (Gerardo & Dave)
• Travis in-chamber for Pcal
• Jeff B will be working on SRs near HAM4
• FMCS RO(reverse osmosis) Alarm--Ski notified

Corey, Sheila

Corey is recovering HAM3 from a HEPI L4C trip.  We are also going to raise the threshold for the L4C WD to 99000. 

If this level is good enough to protect the suspensions, it seems like it should be permanently at this level to avoid unnecessary trips.  How can we make this change permanent?

I'm using the same filters for ITMX pit as ETM pit, here are spectra showing the performance.  In the red traces both Pit and Yaw damping are on, in the blue traces only Yaw damping is on.

The second screen shot shows the Coil driver outputs, the dashed lines are with only Yaw damping on, the solid lines are with both PIT and Yaw damping on.  I will leave all four OpLev admping loops running for now, ITMX+ETMX PIT+Yaw. 

As of 9 am, I've adjusted the Y-bound fiber pol state to : -38.4 - 48.3 +57.15

In this state, I'm seeing ALS-Y_FIBR_TRANS_DC .0023 mW (needs calibration, the reading last night was 0.007 mW and I was having a bit of trouble aligning to it), and ALS-Y_FIBR_REJECTED_I 0.0063 mW. We'll see if the power meter tells the same story.

Power Outage recovery continues at LLO

Morning Alarms:

• BS CPU Max & BSC1/2/3 YELLOW Alarms this morning (don't see on CDS Overview).
• ETMx CPU Max YELLOW
• ETMY CPU Max YELLOW
• BSC1/2/3 DACKILL State
• Lots of INVALID ETMy IOP SUS Watchdog alarms
• DUST Alarms:  LVEA #9 & #15, and LAB#1 & #3 Alarms have RED "Calibrate Failure" alarm

Hrmm, OK. Since I sincerely doubt the re-install of h1susomc had anything to do with the mode cleaner re-locking, I don't think there's a smoking gun here. 

The reboot of MC2 was at 17:47:18 PDT, 4 minutes before, and the iop model for HAM2 was reinstalled earlier at 17:46:14 PDT. 

Hurumph.

This is still a mystery and Tuesday afternoon was still waste of time then!

Using the green beam retro reflected by ETMY leaking into IR path, we found that the IR QPD path was off in YAW. I don't understand why/how, nobody touched this path since HIFO days, and this path worked in HIFO.

We fixed the problem by turning the pico mirror in the IR QPD path. Just tweek one mirror, and both of the QPDs were fixed.

Details:

There are many many many ghost beams because the reflectivity of IR HR for green is lower than that of IR AR, so we used foils to block ghost beams. It is easy to see the correct beam on QPDB, but was impossible to see the correct one on QPDA as the IR 50:50 acts as a good AR for green. Therefore, for QPDA, we looked at one specific ghost beam and used Kiwamu's calculation to set the ghost beam position right. At first both of the QPDs were off in the same direction by about the same amount. We twisted the TMS by giving it a bias offset and were able to bring the beam on QPDs to correct position. We removed the bias, tweaked one pico mirror until the beam positions were good. Unfortunately the green thing is so dim we couldn't see anything on the IR QPDs.

After Travis had notified me of a problem on ETMy where the copper clamps on the ring heater were touching when it was moved into final position I went in chamber and made some adjustments to keep the upper and lower clamps separated. Decided to check if the same problem existed on ITMx and ITMy. Unfortunately, ITMy had part of its macor break while I was adjusting the copper clamps. ITMx had the glass former break sometime after it's installation onto the lower quad. Both lower ring heaters have been removed.