We went in the EY chamber and saw that the return beam was off on the secondary mirror at 1:30 position, the radial distance from the forward going beam was maybe 5 or 6mm. The return beam was not even hitting the bottom periscope mirror under the TMS optics table.

We steered TMS suspension as much as we could using the bias slider and it was clear that we need at least twice the range for YAW, more for PIT. We need positive PIT and YAW, both at around a milliradian. That's huge misalignment.

This cannot be ring ERM as the original ERM was wedge-less.

The wedge of the new ETM is somewhat different (old one was 0.076 deg, new one 0.07, the difference is 0.006 deg or 100 urad), and this is not large enough to cause milliradian difference.

We checked apparent interference but we couldn't do a thorough job.

We installed kapton washers to the picos, but we haven't installed collars as it will change the TMS balance (we will NOT fix the lack of collars as there's no need for gross motion of picos at this point).

FAMIS 6563

Added 100 mL H2O to the H1 PSL crystal chiller. The lower left canister filter is discolored. The top right canister filter is white and clear of debris.

The fault light on the diode chiller is not lit.

Bubba, Gerardo, Kyle 

We removed BSC1's North Door for Betsy W. and re-installed after she completed her in-chamber work.  We are pumping BSC1's annulus with a small turbo backed by a leak detector overnight.  We expect to helium leak test the door in the morning followed by submission of a WP to pump down the Vertex Volume.  

Maik F, Jeff B, Jason O, Peter K, Matt H

Quick summary of recent tasks:

• Beckhoff updates to the new 70W version of the code
• Installed the 70W amplifier diode box and wired up the diode box and the interlocks
• Disconnected the HPO diode boxes and drained them
• Inspected the fibre ends of the recently pulled front end fibres (to be used for the 70W). These were very dirty (at both ends) and needed cleaning. Connected the fibres to the 70W amplifier diode box (using T1500002 as a rough guide)
• Undertook a slope measurement of the 70W amplifier diodes. These correspond very well to the values taken before shipping from neoLASE (data taken from T1700327).
• Connected up the 70W amplifier to the water manifold.
  • One of the connectors of the 70W amplifier leaked (at the thread to the housing). Connection was very loose. Tightening up the connector sealed the leak.
  • We found that the power meter connector to the flow sensor had a wire with its cladding partially stripped off and could cause an intermittent short. Im pretty certain this is the case of the power meter watchdog faults that LHO were seeing occur.
    • We also need to probably cut and re-terminate some of the cables going to the manifold from the control box, so as to get the additional flow sensors into the system.
    • Additionally though the water is flowing work needs to be done to "quieten" down the water manifold
• Connected fibres to the 70W amplifier (after cleaning and Turned on the 70W amplifier (to ~15Ampls) to test that it turns on and that ASE/pump light is emitted. (it does).
• Working on updating various documents related to the 70W work

Summary of the pin layout of the ESD segments as seen from the air-side feed-through connector. Same configuration for ITMY, ITMX, ETMY, and ETMX.

Pin 1 - LR
Pin 2 - UR
Pin 3 - BIAS
Pin 4 - UL
Pin 5 - LL

Following E1400430, Pin 1 is slightly offset in spacing from the other pins. New style feed-through has a one to one pin layout (pins are not flipped inside flange).

ITMX/ITMY alog 39744
ETMX alog 19221
ETMY alog 15656

TITLE: 02/22 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
LOG:

15:49 UTC Kingsoft water through gate to service RO
16:07 UTC Bubba to LVEA to prep for removing BSC1 door, craning engine hoist
16:08 - 16:16 UTC Hugh to LVEA to retrieve tools, then to end X to lock HEPI
16:14 UTC Peter and Carlos to PSL enclosure
16:32 UTC ISI ITMY stage 2 WD tripped (craning engine hoist into beir garten on camera)
16:39 UTC Corey to LVEA to install posts on top of in air tables
16:48 UTC High dust alarm at end X
16:56 UTC BSC1 north door being removed
16:56 UTC HEPI ETMX WD tripped
16:58 UTC Jason to PSL enclosure to join Peter (WP 7366)
16:59 UTC Betsy to LVEA (BSC1)
17:03 UTC ISI EMTX stage 2 WD tripped
17:15 UTC Travis to end Y to remove cover from ETMY
17:16 - 17:22 UTC TJ to LVEA to retrieve tote of parts
17:21 UTC Jason and Peter back
17:31 UTC Gerardo to BSC1
17:31 UTC ISI ETMY stage 2 WD tripped, SUS TMSY WD tripped
17:33 UTC TCSX CO2 laser off
17:34 UTC Alvaro to optics lab
17:34 UTC TCSY CO2 laser off
17:37 UTC Nutsinee to ISCT6
17:38 UTC Kyle and Bubba removing BSC1 north door, Betsy has turned off CO2 lasers and removed keys
17:39 UTC Hugh back, end X HEPI is locked
17:42 UTC ISI ITMY stage 1 WD tripped
17:44 UTC Jeff K. to LVEA to talk to Betsy
17:49 UTC Travis done
17:51 UTC Sheila, Georgia and Jim to end Y, WP 7365
17:52 UTC ITMY HW WD tripping
18:07 UTC Travis to LVEA
18:12 UTC Filiberto at end Y, retrieving high voltage tester, fixing cable
18:12 UTC TJ to LVEA to retrieve part and then to optics lab to work with Alvaro
18:19 UTC Travis back
18:27 UTC Corey to end Y
18:30 UTC Marc to LVEA to check on squeezer equipment
18:40 UTC Marc back
18:40 UTC Ed to SQZ racks by HAM6 to shorten cables
18:46 UTC Keita transitioning end Y to laser hazard
18:56 UTC Filiberto back
19:14 UTC Filiberto to BSC1 for HV testing
19:15 UTC end Y is laser hazard
19:17 UTC Marc retrieving cable from LVEA
19:34 UTC Jeff, Filiberto, Betsy back. Kyle and Bubba putting door back on
19:39 UTC Columbia Center Engineering through gate
19:54 UTC Corey done at both end stations. Going to LVEA to put equipment back.
19:55 - 20:02 UTC Travis to LVEA
19:59 UTC Nutsinee back
20:02 UTC Mike F. and Matt H. to PSL enclosure
20:08 UTC Corey out of LVEA
20:17 UTC Keita back
20:19 UTC Jason to PSL enclosure
20:29 UTC TJ and Alvaro out
20:31 UTC Jeff K. measuring ITMY
21:09 UTC Georgia, Sheila and Jim back
21:14 UTC Took ITMY SUS to safe. Filiberto to BSC1 to pull cables
21:45 UTC Filiberto back
21:47 UTC Peter back
21:51 UTC TJ and Alvaro to optics lab
22:04 UTC Keita and Georgia to end Y
22:12 UTC Filiberto back to LVEA to check for short at feedthru
22:19 UTC Gerardo to mid Y
22:33 UTC Filiberto back
23:00 UTC Siteweekly meeting
23:58 UTC Jason and Matt done in PSL for day
00:04 UTC Betsy turning CO2 lasers back on, returning keys
00:04 UTC Jeff. B. back from PSL

In prep for removing the BSC1 door, I turned to OFF, and then removed the keys to the TCS lasers in the LVEA. 

To have a place to hold/anchor bundles of cables for the In-Air tables, fixtures were installed on the top of the enclosures of most of the in-air optical tables for H1; this includes:  ISCT2, TCSy, TCSHT4R, TCSx, ISCT6, SQZT6, ALSy, & ALSx.  (Could not install a fixture on IOT2 because there was other equipment in the way.)  For all tables, I handled cables & had to lift bundles of these cables to fit them on the new fixtures (see photos of various installations).

While closing out the recently replaced SUS ITMY R0 RT OSEM (alog 40634), found short on UIM chain. Short is on cable SUS_ITMY_16, pin 5, cathode side of LED for UIM UR.

This morning, Kyle and Bubba finished removing the door to BSC1.  I entered the chamber and began poking the ITMY R0 Right BOSEM cable from the OSEM connection out through the structure to the Table Cable Bracket.  No change.  I then also tried all of the following which produced no improvement to the spectra:

- Reseating the cable in the Table Cable Bracket

- Unbundling the cables that were secured to the upper structure leg

- Reseating the cable on the BOSEM itself

- Swapped the RT cable with the Side - problem went away - which meant that the problem was the BOSEM itself.

Removed BOSEM from structure and attempted to find short on the unit - no luck.  Swapped unit which meant removing it from it's adjustment bracket and rebuilding before reattaching.

Once back on the structure found it was OK.  Set OLV and 50% flag setting.

Cleaned flooring, removed tools, looked for cable routing issues in case I undid some other nice work.

Left chamber.  Kissel ran a few TFs which showed healthy.  Fil checked for HIPOT on the ESD connection and started another rounf of ground loop checks.  Tacked up door.

FAMIS 6938

The script reports: "ETMY_ST2_CPSINF_V1 high freq noise is high!"

The following appear elevated:
ITMX_ST2_CPSINF_V1
ITMY_ST1_CPSINF_V2
ITMY_ST2_CPSINF_V2
BS_ST1_CPSINF_H1_I
BS_ST1_CPSINF_V2_I
BS_ST2_CPSINF_H2_I
BS_ST2_CPSINF_V1_I
BS_ST2_CPSINF_V2_I
HAM3_CPSINF_V1

This is just a FYI for future re-enabling of BSC10 ISI, the EY HWWD tripped after an LED fault persisted for more than 20 minutes. The fault condition has subsequently been removed, however the ISI trip is latched (ISI coil drivers are powered down) until such time the front panel reset button on the HWWD chassis is pressed.

TravisS and RickS

Yesterday, we switched on the Pcal laser at Yend to check the alignment of the beams after the replacement of the ETM.

With the ETM in the nominal alignment according to the optical lever, we found that the Pcal beams at the Rx side are badly misaligned, one beam actually missing the relay mirror.

This is likely due to either a) the ETM not being properly oriented or b) the Pcal periscope orientation having shifted during B&K measurements or the addition of vibration dampers back in January.

We plan to investigate early next week, going inside the vacuum envelope and installing the Pcal target on the ETM suspension structure.

See alogs 39484 to start, this covers the corner3 CPS laying on the rail and attempts to clear it.  It seemed okay after in chamber work on  30 November, alog 39579.  However, as I look again in an effort to close the ticket, it looks like while the position has not shifted (like it was doing before,)  the noise on the channel has increased.  The increase is not causal with door removal and the other corners' sensors do not show any similar time series noise expression.  This corner3 CPS satellite box is maybe the most vulnerable to proximal activity and there is of course the 5-way cross installation complication. Dang!  I will change the FRS status from PENDING to what ever it should be now.

The attached 120 day plot shows the HAM6 CPS local sensors.

J. Kissel, B. Weaver

Far more details to come, but we've replaced the H1 SUS ITMY R0 LF OSEM in order to fix the noise / shorting problem (see LHO aLOG 40555, FRS Ticket 9683, Work Permit 7358). It's new open light current values are 

         Open Light Current / ct     GAIN          OFFSET
         (as ADC Counts)             (30000/olc)   (-olc/2)

R0 RT    29804                       1.007         -14902

I've accepted the new values in the SDF system.

Following yesterday's work on BSC1 (alog 40622), we tested the ITMY ESD cables with the HI-POT tester. All pins were tested to 1KV and passed.