[Joe Gleason, Chris Mueller, Alberto]

Yesterday we set the lenses on the ALS path on the PSL for mode matching to the ISCT1 table.

The ideal solution had a R=75mm lens and a R=257mm lens placed after the ALS Farady and separated by about 60cm (see LIGO-T1200471-v5 for details). Ideally this should have given us a waist of 68um radius between thw two lenses and a collimated beam of 3mm radius after the second lens. In actuality we measured a waist radius of 75um between the two lenses and becasue of this the second lens was placed at a different distance than designed. The beam coming out of the second lens had the desired size, however, due to the limited room on the table to do a long range beam scan, it was not easy to assess whether the beam was actually colimated, rather than diverging/diverging.

To be sure that the beam would not further diverge on its path to ISCT1, we set the second lens such that the beam would slightly converge over the 50cm or so that it covered over the table.

When the ISCT1 table is installed, someone will have to finely tune the position of this lens, if the beam size at its arrival on the table is not as desired. 

Mode matching on ISCT1 is designed to accept basically any relatively large beam (~>1mm) which arrives to the table almost collimated.

Attached are plots of dust counts > .3 microns and > .5 microns in particles per cubic foot from approximately 8 PM Nov. 12 to 8 PM Nov. 13. Also attached are plots of the modes to show when they were running/acquiring data.

Apollo, Jax, Thomas

We completed the mechanical installation of the H1 ITMY Optical Lever, all of the components fit together as designed and the QPD currently reads back a signal into EPICS via these channels:

H1:SUS-QUADTST_L3_OPLEV_PIT_OUTMON
H1:SUS-QUADTST_L3_OPLEV_YAW_OUTMON
(with H2 ITMY calibration parameters but these are no longer valid, will re-run test for new parameters once the cartridge is installed, the optic damped, and the chamber pumped down)

These channels run into the test stand electronics in the LVEA at the moment but will soon be plugged into the permanent H1 OptLev channel in the H1 electronics bay, cables to be ran. 

Next we have to align, measure the waist and calibrate the signal.

[Joe G., Luke W., Cheryl V., Chris M.]

Today we realigned the paths on the PSL table according to D0902114 with a few minor exceptions.  The first exception is that the ALS beam path was moved two inches closer to the reference cavity to give some more room between the EOM and ALS Faraday.  The second exception is that the optics which were moved to accommodate a possible periscope shift (alog 4662) were left in place even though the periscope was not shifted significantly.  

In addition the periscope was removed in order to fix the damping goo problem and put back in place.  

As of now the PSL is ready to inject a beam into the HAM 2 chamber for IMC flashing and alignment, which we expect to do tomorrow evening.

Purge air depressurized for ~15 minutes around 1615 hrs. local

BSC1 (Cartridge)

• Cartrdige/ITMy Alignment work (Doug):  requiring Laser Hazard soon---MAKE SURE TRANSITION CORRECTLY!!!
• Cartridge Insertion:  Not today most likely (prep)
• Prism Photo Survey (Margo/Kate): 
• Cleanroom/Platform moves (Bubba)
• Cabling Satelite -> feedthrus in the morning (Filiberto)
• Dial Indicators (Hugh)----wait for after Robert

PSL/IO: 

• PSL Table:  New spacers under PSL Periscope
• HAM2 work
• Michael turns laser ON at 9:47am

Septum viewport install HAM1/2

Viewports installed on top of HAM2 (center & north)

BSC2 Cartridge

• Mass pulled
• cable routing
• float

Optical Lever (need for Robert's test)

• transmitter complete
• receiver being installed for ITMy (Thomas & Jax)

DAQ Work

• h1daq restart (for slow controls)
• front ends going down (as bring in new front ends)
• lsc & asc

EX--clean & dome ready to be removed (maybe this afternoon)

Bubba said, "Clean stainless is being loaded into bin"

The LVEA is now in LASER HAZARD from about 10am - 1pm.

EY Dust Alarm (gerardo, worden, jodi)---note:  Access System is not communicating to EY & EX

EY Chiller Yard alarm (due to Robert measurements)

Maintenance:

Pallets picked up near Staging (two loads)

Fire Dept on site.

A staging cleanroom was moved from the HAM1/2 area to BSC1/HAM3 area and then the central curtain partition was installed to create a garbing/staging cleanroom. Cris cleaned once the cleanroom was in place. Folks working in BSC1 (Lower Level) and in HAM3 should be able to garb and stage from this cleanroom.

Mark B. 

Commencing DTT TFs on ITMy. Will get as far as possible this afternoon and then continue this evening. Priority is M0 and R0 undamped, then M0 and R0 damped.

• ITMy/CPy Gap: 20.35 mm
  • Target: 20 mm
  • Tolerance: ±0.25 mm
  • A verbal waiver on the 0.1 mm out-of-spec on the gap was given by N. Robertson, since this is not the final CP (there will be a switch at a later date)
• CPy Pitch: 1.16 mrad down
  • Target: 1.33 mrad down
  • Tolerance: ±1.4 mrad
• CPy Yaw: 582 µrad CCW
  • Target: 0.0 mrad
  • Tolerance: ±1.4 mrad

• ITMy Pitch: 29 µrad down
  • Target: 12.5 µrad up
  • Tolerance: ±160 µrad
• ITMy Yaw: 7 µrad CW
  • Target: 0.0 mrad
  • Tolerance: ±160 µrad

Added memory to the h1broadcast0 computer to avoid memory swapping.  Fixed error in configuration file for monit, then started the daqd process to start broadcasting to the DMT computers.  

As part of WP#3559 I changed the h1iopsusquadtst model to add a user switch to disable the watchdog. I also renamed B478 and ITMY to QUADTST in this model.

I then stopped the QUADTST user model and the phone promptly rang in the control room, it was Doug, who was using h1susquadtst to check out the ITMY suspension attached to the test stand, oops.

After a get together with Mike, Mark, Doug and Dave we figured out where the confusion was. We have stopped the IOP upgrade work for now so Doug can complete his work this afternoon.

We restarted H1DAQ to investigate "invisible" disconnected slow channels which the EDCU could not list by name. Restarting the DAQ caused h1sush2a (MC1,MC3) to go into a bad loop, constantly printing an error messge to the console. It was not ping'able or ssh'able. The error message was

nf_conntrack: table full, dropping packet

...ad infinitum

This is the network filter connection tracking system. We presume that the DAQ restart did something bad at the mx_stream FEDAQ network port on this machine. We had to power cycle to recover h1sush2a. Unfortunately h1sush2a also took down all MSR Dolphin machines, and all mx_streamers needed a restart.

At the end of this bootfest, the H1DAQ EDCU was now connected to all channels, so we could not reproduce the "invisible" disconnected channel issue. Patrick did some dataviewer tests for slow channels and did see some inconsistencies in minute trend data.

The IOChassis for H1 LSC and ASC were connected to the front ends and their timing was connected. We powered up h1asc0 first, and as expected it killed all user models on Dolphin connected computers and timing glitched their IOPs (a standard Dolphin glitch). Before we powered up h1lsc0 for the first time, we tried to disconnect its node from the dolphin fabric, but when it started we again dolphin glitched the MSR.

At the end of this bootfest, I copied the IOP models from L1 to run as h1ioplsc0 and h1iopasc0. There is an IRIG-B timing error on h1lsc0 which will look at later.

Yesterday I visited END Y and noticed that the BSC6 annulus ion pump was maxed out (red led). Also we have noticed that the pressure in the main volume has been cycling due to main ion pump voltage switching.

So, this morning Gerado and I reconnected the AUX turbo cart to the BSC 6 annulus and began pumping again. It appears the annulus had drifted up to ~1 torr. We do not know when the annulus ion pump railed - it may have been

due to a power interruption. This ion pump is not yet trended in the CDS but it looks like cabling is mostly complete. Gerardo is going to look into this.

To correct the cycling pressure in the main volume we programmed the main ion pump power supply to operate in "Fixed Voltage" mode at 5KV.

Mark B.

Trying Stuart's TF script adapted for undamped and damped M0 and R0 TFs on ITMy (QUADTST), from 11:25 pm.

- JoeG, ChrisM, Luke, Alberto, Cheryl

Today we installed the aLigo H1 spacers under the PSL periscope.  This raised it about 1".  

The real upper periscope mirror, glued to a PZT, is now installed.  

The red eye-safe laser pointer is still attached to the periscope, and was used to look at the beam as it traveled from the PSL table to HAM2.

The beam is making it from the PSL to HAM2.  The periscope was moved to compensate for the misalignment of the beam on the viewport aperture, and is now about 1/2 an inch from the tube at the top of the periscope mirror.  Tomorrow we'll discuss other possible options for splitting the difference in misalignment.

I cleaned and reinstalled the EOM into the IO path.  It's as close as possible back to it's original alignment, based on landmarks I left for myself, and will need to be aligned tomorrow when we get a beam back.

picture 1) IO_MB_M2 optics boxes - old 1" optic and new 2" optic.

picture 2) EOM reinstalled - ALS FI had to move and lost a needed beam dump.  I just talked to Keita, and the proposed solution is to move the ALS path 1" toward the reference cavity.  Will discuss at tomorrow's meeting.

Mark B.

I used DTT to take a set of undamped TFs for M0 and R0 of ITMy (connected up as QUADTST). Screenshots are attached. The graphs look pretty clean.

P.S. Stuart has sent me a set of scripts that has worked recently at LLO but it needed adaptation and I wanted a quick result. I'll try it out this evening, after Jason is done.

Mark B.

Set MC3 to undamped at 08:55 for a 20 minute spectrum series. (We already have a nice damped interval from last night).