The SEI test stand daqd process was failing because the /frames disk was full.  To correct, removed oldest full, minute trend, and second trend files.  This should be done automatically, need to investigate.  Also corrected port number of NDSSERVER environment variable for seiteststand2.

Yesterday, Thomas and I tidied up the HWS electronics on the ALS table that is now at the end station. The two power cables connecting to the Hartmann sensor have been attached and those cables, plus the fiber-optic and temperature sensor cable that go to the Hartmann sensor, have been tied to a post and routed up the cable tray to the HWS breakout box (see attached photo).

The feedthrough panel was replaced with a new version where the 37-pin feedthrough is horizontal and doesn't interfere with the Bosch/Unistrut framing of the enclosure.

We installed the on-table temperature sensor by the second lens in the HWS imaging system (see attached photos). We moved the Hartmann sensor 2" closer to the PBS to get the fiber-optic cable out of the beam path behind it. I still need to lengthen the optical system by 2" to compensate for this and keep the image plane of the ETM on the Hartmann sensor surface.

HAMISI #5 Mechanical Checks & Measurements

(corey, eric, hugo, jim)

Dial Indicators were re-installed.  We conducted many of the range of motion checks for Hugo.  Jim re-balanced the table as well.  Not able to get S/Ns for Horizontal Actuators, but since we don't have "real" GS13s in this assembly, we'll get the S/Ns when we pull out these "tester" gs13s.

HAMISI #6 Stiffener Complete

(corey, eric)

We assembled the Stiffener.  It is all torqued down, and we checked for any gaps with a 0.002" shim (we looked good).  Tomorrow we will install the Support Posts and can move the Stage-0 assembly on to the Test Stand.

I replaced the fuse for the dust monitor in the clean room over BSC8 (LVEA location 15).

GregG & HughR
Greg went in chamber and added the screws to the ISC Cables that had none.  These were reconnected and are now secure to the FeedThru.  These were the ISC Transmon 532nm & Beam Diverter cables.
Also, Greg connected the one still dangling cable to F3-3C2 (D1003085), presumably this is the TCS-Ring Heater cable.

Next we took some level shots on the Optical Table and saw +-0.2mm level.  We made some slight HEPI tweaks and using the dial indicators as a guide to what we did, we now have the level to +-0.1mm.  So this should be good.

We'll make the Actuator Connections next.

Often, in our haste to write aLOGs, we may put up errant / incomplete information. After a re-read later, we may correct typos, add extra files / information, etc. Y'know, edit it. However, when these logs are edited, they send out L-mail as though they were new. For those of us that forget about the "preview" feature, my request is as follows:
(1) If an entry is edited vs. newly created, the L-mail message should reflect that. Instead of "A new report has been made...," perhaps something like "A report has been edited..."
(2) We should have the ability to suppress L-mail notification with the understanding that, like the DCC, this should be discouraged, and reserved only for minor changes (e.g. typographical). I've seen this ability in other logbooks, like The Seismic Group Notebook.


On a separate request, but still involving L-mail (and maybe the "link" feature in general): it is often very useful to see not only the specific log entry that has been linked from L-mail, but the context around it. Is there anyway for an entry's link to take you to the full page of surrounding entries, in addition to just the linked entry? I've found that sometimes, when I get around to reading my L-mail, that the entry of interest has fallen off the "front page" of the log, so when I hit "home" to see the other log entries around it, I have to re-find the entry, through several more clicks.

Today, FMY M1 WhiteNoise transfer function measurements were taken on the FMY M1 top mass for each DoF. There have been concerns of rubbing from measurements last	taken in mid-March.  Comparisons with previous measurements will follow.  

PSL installation team

April, 27th

- Craned PSL oscillator, amplifier, gantry crane and others over from the H2 LAE to H1 LAE (see photo).
- Beckhoff up and running.
- Cabeling at the PSL racks next to the enclosure is ongoing.

April, 30th

- replaced all four water filters (those underneath the optical table and the ones at the chiller returnes). All of them are 10 µm filters now.
- removed lifting frame from the oscillator box and mounted the oscillator, the mopa and the DBB to the optical table.
- Put the new cabinets into the H1 ante-room and moved stuff (spare components / PSL components) over from the H2 ante room 

May, 1st

- moved/cleaned one of the cabinets from H2 ante room, because we needed one more for the H1 ante room. It contains the spare HiPoPMC et al.
- MOPA turned on and aligned (output 33.9 W)
- all spare components and components from the "old" optical table are now inside the H1 LAE (this includes the high power PMC / ISS box)
- started to put optis on the laser table
- characterized fiber bundles for the high power oscillator: two fiber bundles (#2,#3) are already reassembled to the oscillator. Fiber bundle #1 has been cleaned twice.
- removed the 4f lenses and the laser crystals from the oscillator as preparation for the pre-alignment procedure.

HAM-ISI Assembly Validation Procedure (Phase I) was Updated. The new version is available in the DCC

A brief desciption of the modifications applied will be given at the next SEI Testing and Commissioning Meeting.

We're not transitioning to laser hazard yet.

But pretty soon (tomorrow hopefully) we'll start transitioning back and forth (daytime=safe, after IAS and others are done = hazard).

• ISI X position: 2.7mm South
• ISI Y position: 1.2mm West

Correcting these numbers with the ETMy test stand positions gives the current ETMy position errors (error spec is ±1.0mm for X, ±3.0mm for Y):

• ETMy X position: 1.7mm South
  • ETMy was 0.97mm North on the test stand
• ETMy Y position: 1.2mm West
  • The +4mm test stand error was already corrected for with the setting of the monument, so no change

With the estimated error, this puts the ETMy lateral position either within spec or wildly out of spec.  The axial position is in spec regardless.

Vincent was ready to use the opportunity of BSC6 availability so I've uncovered the ISI.  For several days now, the ISI has been covered allowing work down below in the cleanroom, with the doors covers in place, with just a frock, cap, & mask.  Now that the ISI is uncovered, all entrance to the BSC6 cleanroom requires full bunny garb.

I relieved Corey at ~12:00 today, who was relieving someone else during the morning.
- Fire alarm maintenance was here in the afternoon.
- Apollo made a delivery for Hugh at ~13:55.
- EY: IAS, SEI, ALS, TMS, usual work. Phone communication still not working from the Control Room to EY (unclear if signal block is electronic or human in nature).
- BSC8: SLC, SUS working on finishing up BSC8 ITM, FM installation. We should work on keeping a camera pointed at BSC8 because the Control Room receives many inquiries regarding the status of work at BSC8.
- LVEA dust monitors not working for much of the day.
- AEI group continues working at PSL.
- Ops: Please give feedback to Cheryl.
- OSB doors locked at 16:05.

HAMISI#5 Work (Corey, Jim)

• Moved all dirty cables to the HAMISI#5 Test Stand
• CPS were aligned & gapped.
• Table was balanced vertically (within 400 counts) & Lockers were adjusted to have good Horizontal Lock/Unlock gaps

HAMISI#6 Work

• Finished helicoiling Stage-0 (Corey)
• Completed Locker Sub-assemblies (Eric)

Moved /ligo/apps/linux-x86_64/epics to point to epics-3.14.12.2_long to fix bugs.  StripTool now works on Linux workstations.  This version has been installed for Darwin for several months with no problems.

 BSC8 (ITMy)

Zeroing offsets of HEPI this morning(Hugh)

BSC6 (ETMy)

• Travis and Jason conducting alignment work
• With alignment work, have received Watchdog alarms (due to their moving around of the mirror)

BSC3

In Chamber Cleaning begins

Miscellaneous

• Rick has mentioned an alarming Dust Monitor out near BSC8
• Measuring bellows circumference at EX (Jonathan B)
• Have had many INVALID alarms for many Dust Monitors for the last few hours this morning.  Have silenced these alarms.

Visitors

• Paradise, & Sno Valley onsite (have been others, but the feedback on the gate mic makes it hard to hear visitors)
• Basin Disposal picked up cardboard bin

After growing up in the optics-table nursery next to HAM-6, the ALS table has struck out on its own into the wider world.  It found a nice rent-controlled place about 2.5 miles to the south that advertises an unobstructed view of ITMY.  It's settling in; the cable guy is scheduled to arrive tomorrow sometime between 8am and 4pm.

Before the move, Alberto and I wrapped all the external fixtures in Ameristat, plugged holes with clean-room tape, and then wrapped the entire table enclosure and the legs in plastic wrap to keep the dust off.  The Apollo crew did a masterful job craning the table out of the laser area (table weight: 2250 lbs) and then moved it to the flatbed trailer with a forklift.  Despite winds gusts that had to be ~45mph, the trip to the end was smooth.  We stripped the plastic wrap off in the first highbay area, gave everything a thorough wipe-down with alcohol wipes, and pushed the table into its new home.  Thanks to TVo and Tomoki for the help.

The HEPA fan for the table is plugged in and running.  We lowered the screws on the table legs; we'll probably have to fine-tune the position once we start aligning beams, but for now there's enough friction that you won't move the table if you push on it.

Pictures attached; there's a time-lapse video of our trip down the arm here: http://www.youtube.com/watch?v=zZ4hqGtzz40

BSC8: 

• Jeff G & Vincent ran measurements on this system throughout the day.

BSC6: 

• ISC Table was to be moved down from LVEA.
• Jason entered chamber for some quick work (he said he'd only be ~5min or so)

PSL:

• Moving cabinets in the PSL House
• Getting phones hooked up
• Later in afternoon, Rick & PSL crew were setting up to Power Up the laser.

BSC3:

• Documenting of chamber state
• Begin In Chamber Cleaning
• Remove door (on Beer Garden side)

MISC:

• FMy front end restart (Dave & Garcia)
• Checking of network settings on LVEA workstations (Jim B.)
• T Vo started work on re-installing H2ITMy Optical hardware
• Filiberto started work of moving location of Dust Monitor Interface Box

The rogue excitation monitor trips when there is a voltage on the coil drivers readback (>100mV) whereas either the masterswitch is turned off or the watchdogs are tripped.

I was able to trip this monitor when there was no excitations (by tripping the ISI-SUS watchdogs). I drove -32000 counts (-9.76V) on one actuator and tripped the ISI-SUS watchdogs. As soon as the watchdogs tripped, the outputs of the models are 0 (ISI watchdogs + DACKILL part). But the voltage on the readbacks didn't go down to zero instantaneously. It took about 2 seconds to reach 100mV (the current threshold).

On the attached plots (coil drivers stage 1 and 2), the left hand side figure shows the state of the watchdogs. When The ISI WD goes from state 2 to 4, there are no outputs on the DAC. On the right, the figure presents the DAC output, the coil driver readbacks and the rogue excitation monitor threshold. You can also note the discrepancy between the DAC output and the coil driver voltage readback (inacurate calibration/ accuracy of the voltage monitor).

We should add a 3-second delay on the ST1_CD_Driven and ST2_CD_Driven channels in the ERRMON block of the isi2stagemastermodel. Same things for the HAM model.

We inspected several things. More pictures were taken than shown here, which are to be posted to resource space by Calum.

1. Washers that were stuck

There are four stainless washers used for TMS temporary restraint that were stuck to the aluminum bracket (see  picture). I tried to lift them all gently, and they wouldn't move at all. Might be possible to ply it off using some tool, but we agreed it's not worth the risk of flipping and flying them to break wires.

2. A cable that is not connected

There was one cable that is not connected yet, and we identified it as the ring heater cable connecting CB-3 and the vacuum feed through (F3-3C2). This is going to be taken care of later.

One thing I noticed is that the floor order for this bracket is reversed. CB-3 first floor (closest to the  ISC table) should be one of the ETMY SUS cables, and the second floor should be the ring heater according to D1101478, but in reality it was the opposite (see the second picture, the white-ish cable is for the ring heater).

It's easy to tell the difference because of the color, but I think it's still a good practice to install things as specified for future workers.

3. One of the TMS cables was brushing the HWS mirror

The cable sagged, apparently. We fixed this (see the third and the fource picture).