fixed "sei_config" guardian node imports

The "sei_config" guardian nodes (ISI_*_{BLND,SC}) were showing import errors having to do with not finding the module "SEI_CONFIG".  It looks like this module was renamed to "sei_config" on March 26, but the nodes that import it were not updated to import the module under the new name.  I've updated them appropriately, and committed to the SVN:

jameson.rollins@opsws12:/opt/rtcds/userapps/release/isi/h1/guardian 0$ svn status
M       ISI_BS_ST1_BLND.py
M       ISI_BS_ST1_SC.py
M       ISI_BS_ST2_BLND.py
M       ISI_BS_ST2_SC.py
M       ISI_ETMX_ST1_BLND.py
M       ISI_ETMX_ST1_SC.py
M       ISI_ETMX_ST2_BLND.py
M       ISI_ETMX_ST2_SC.py
M       ISI_ETMY_ST1_BLND.py
M       ISI_ETMY_ST1_SC.py
M       ISI_ETMY_ST2_BLND.py
M       ISI_ETMY_ST2_SC.py
M       ISI_HAM2_SC.py
M       ISI_HAM3_SC.py
M       ISI_HAM4_SC.py
M       ISI_HAM5_SC.py
M       ISI_HAM6_SC.py
M       ISI_ITMX_ST1_BLND.py
M       ISI_ITMX_ST1_SC.py
M       ISI_ITMX_ST2_BLND.py
M       ISI_ITMX_ST2_SC.py
M       ISI_ITMY_ST1_BLND.py
M       ISI_ITMY_ST1_SC.py
M       ISI_ITMY_ST2_BLND.py
M       ISI_ITMY_ST2_SC.py
jameson.rollins@opsws12:/opt/rtcds/userapps/release/isi/h1/guardian 0$ svn commit
Sending        ISI_BS_ST1_BLND.py
Sending        ISI_BS_ST1_SC.py
Sending        ISI_BS_ST2_BLND.py
Sending        ISI_BS_ST2_SC.py
Sending        ISI_ETMX_ST1_BLND.py
Sending        ISI_ETMX_ST1_SC.py
Sending        ISI_ETMX_ST2_BLND.py
Sending        ISI_ETMX_ST2_SC.py
Sending        ISI_ETMY_ST1_BLND.py
Sending        ISI_ETMY_ST1_SC.py
Sending        ISI_ETMY_ST2_BLND.py
Sending        ISI_ETMY_ST2_SC.py
Sending        ISI_HAM2_SC.py
Sending        ISI_HAM3_SC.py
Sending        ISI_HAM4_SC.py
Sending        ISI_HAM5_SC.py
Sending        ISI_HAM6_SC.py
Sending        ISI_ITMX_ST1_BLND.py
Sending        ISI_ITMX_ST1_SC.py
Sending        ISI_ITMX_ST2_BLND.py
Sending        ISI_ITMX_ST2_SC.py
Sending        ISI_ITMY_ST1_BLND.py
Sending        ISI_ITMY_ST1_SC.py
Sending        ISI_ITMY_ST2_BLND.py
Sending        ISI_ITMY_ST2_SC.py
Transmitting file data .........................
Committed revision 17121.
jameson.rollins@opsws12:/opt/rtcds/userapps/release/isi/h1/guardian 0$

 

Stopping Attended Pump Down of Vertex

As of 03:00 utc rough pumping was stopped, and pumping will restart on Monday.

Vertex pump down and NO HAM6 chamber work

We started roughing out vertex today and will resume on Monday. We might reach hard vacuum on Tuesday at which point HAM6 in-chamber work and viewport work can resume.

BSC10 annulus

Pumped on BSC10 annulus all day at around 2-3e-6 Torr. Powered on AIP, but it never fell below 10 LED lights. Looks like we need to replace that pump. Left AIP valved out and ON and turbo cart valved out and ON for weekend.

leak hunting at EY

Yesterday we suspected a large air leak at EY when pressure wouldn't drop below e-4 Torr with main turbo. Before pump down, we had valved in the new IP11+baffle and new HV NEG+housing into main volume in order to pump them out without needing separate pump carts. Valved IP+baffle out last night and the main volume pressure fell fast to normal levels in e-6 Torr range.

Today we found a large air leak in the chevron baffle nipple/housing measuring 5e-1 mbar-L/s, after finally bagging it. We also found a gappy mini conflat flange on one of the HV feedthrus that appeared to be the culprit until bag test on nipple. I was able to tighten the mini conflat metal to metal. It may have a small leak but with the other large leak it's too hard to tell until we separate them.

On Monday we will remove the IP and baffle and investigate. Hoping the baffle nipple leak is from a gasket and not a cracked weld. The new IP isolation valve allows us to vent one side up to air without interfering with main volume pump down.

EY MTP backed by scroll

Transitioned turbo backing pump from QDP80 to scroll pump this evening and purged & shut down QDP80. Water lines are still valved in partially to continue cooling the pump, and there looks to be a very small water leak from the booster pump. Purge air skid is still on. We should be able to turn it off next week. EY main air compressors are also running for the turbo safety valve.

70W amplifier update

A solution to mode match the output of the 70 W power amplifier to the pre-modecleaner was found that
did not mechanically clash too badly with already installed components.  The lenses were positioned and
the initial pre-modecleaner visibility was ~60%.  After adjusting the lenses, the visibility improved to
~88%.

    Upon increasing the power incident on the pre-modecleaner the visibility dropped to ~78%.  Some
tweaking of the lens positions under full power will be required - which is not surprising.  Attached
are the two transfer functions measured at low and high power.  Both have a unity gain frequency of
~5.5 kHz.  At the moment ~56 W is transmitted through the pre-modecleaner.

    Transfer functions of the frequency servo were also taken.  We were able to push the unity gain
frequency out to ~540 kHz with a phase margin of ~60 degrees.




  Jason / Peter

Shift Summary - Day

TITLE: 04/06 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC

STATE of H1: Planned Engineering

INCOMING OPERATOR: None

 

LOG:

13:30 (6:30) Peter to PSL enclosure

14:27 (7:27) Tyler, Mark Chris to LVEA -- HAM5 door attachment

15:00 (8:00) Start of shift

15:57 (8:57) Fil, Ed to EY -- cable clean up

16:00 (9:00) Jason to PSL enclosure -- 70W work.

16:17 (9:17) Gerardo to HAM5 -- pump down

16:18 (9:18) Terry, Sheila to LVEA

16:23 (9:23) Chandra to EY -- vacuum work

16:26 (9:26) Terry, Sheila out of LVEA

16:27 (9:27) Tyler, Mark, Chris out of LVEA -- doors on

16:28 (9:28) Tyler, Mark, Chris to LVEA -- crane forklift

16:33 (9:33) Richard to LVEA

16:40 (9:40) Richard out of LVEA

17:13 (10:13) Gerardo out of LVEA

17:19 (10:19) Tyler, Mark, Chris out of LVEA

17:28 (10:28) Bubba, guest to LVEA

17:52 (10:52) Gerardo to LVEA -- start roughing vertex

18:07 (11:07) Peter out of PSL enclosure

18:09 (11:09) Jason out of PSL enclosure

18:14 (11:14) Bubba, guest out of LVEA

18:14 (11:14) Bubba, guest to EX

18:46 (11:46) Fil, Ed back from EY

19:30 (12:30) Peter to PSL enclosure

19:35 (12:35) Jason to PSL enclosure -- 70W work

19:58 (12:58) Sebastien to PSL enclosure

20:13 (13:13) TVo, Georgia, Dan to SQZ Bay

21:17 (14:17) Terra to SQZ Bay -- talk to TVo

21:23 (14:23) Terra, TVo out of SQZ Bay

21:50 (14:50) Gerardo to HAM5 -- check on cart

22:00 (15:00) Gerardo back from HAM5

22:00 (15:00) Gerardo to EY -- assist Chandra with vacuum work

22:20 (15:20) Peter, Jason, Sebastien out of PSL enclosure

22:30 (15:30) Georgia, Sebastien to SQZ Bay

23:00 (16:00) End of shift

Vertex Pump Down

Before starting roughing out the vertex, the annulus system for HAM5 was prepped for pump down by inserting two stoppers into HAM6 annulus system at both door flanges, north and south.  HAM5 annulus system was pump down with an aux cart, and after 2.5 hours of pumping the annulus pressure reached 6.1x10^-05 torr, no leak checking was performed.  Aux cart continues to pump down on system.

After dealing with HAM5 annulus, the purge air blow down dew point was measured at -32.1 ^oC.  Proceeded to equalize the entire system to atmosphere.

Following procedure, rough down was initiated at the vertex at 12:21 local time.

Per WP#7461

PT246 alarm level increased

As requested by Chandra, the PT246 cell phone alarm limit has been increased from 5.0e-09 to 1.0e-08 Torr to prevent false-positive alarms this weekend. I took the opportunity to change Chandra's and Gerardo's contact email addresses to their new caltech ones. 

p.s. we are bypassing the INTERLOCK cell phone calls until Monday.

ISI model ready for update

FYI -

We've updated several files in the {userapps}/trunk/isi/ directories. These can be installed on site when it is convenient.

These updates add a feature to the ISI-Watchdog so that when the watchdog is tripped it 'cushions' the isolation loop turn-off to reduce the impulse sent to the Suspensions.

Details for the installation are in the SEI log 1323.

Description of the new parts can be found in T1800031 - Smooth Ramp for Isolation Turnoff by Dane Stocks

The ECR is E1800026 and Integration issue 9889 . 

 

HAM5 SUS TFs Now Clear; OK for Doors

J. Kissel, T. Shaffer

While ZM2, SRM, and SR3 show clean and clear transfer functions as soon as we were out of chamber, the OFI gave us a little scare. All is OK now, but see the story below.
Given Jim's positive assessment of the ISI (LHO aLOG 41313), and now our positive assessment of SUS (this aLOG), 
I conclude that we're ready put doors back on early tomorrow morning.

Again -- excellent work team!!

We took all DOFs for all HAM5 SUS listed above (at a 0.02 Hz resolution) to ensure goodness, and all now appear good. I attach a smattering of the DOFs as proof.

Details of the OFI scare:
The magnitude of all DOFs of the OFI TFs showed a decrease of a factor of 20 or so (see first attachment, blue trace). Knowing we hadn't messed with electronics, a time-machine of the MEDM overview screen made me quickly realize what should have been obvious. The added weight of the new OFI SQZ path picomotor shifted the balance of the OFI in roll enough to completely close-light the OSEMs, so they were barely reading ~hundreds of counts off the ADC when they normally should be centered at ~15k cts. As such, TJ and I quickly ran out to HAM5 again and centered the OSEMs back to ~15k ct off of the ADC. This returned the magnitude of the TFs to normal. There's a bit of fishy-ness happening at around ~1.6 Hz in a ll the TFs, but even if it is cross-coupling because the OSEM's aren't aligned ( in the plane perpendicular to the sensitive axis), that shouldn't matter for the suspended performance. The Qs of the primary resonances look as they did before, and there's no evidence for rubbing there.

EY pump down

Started roughing out EY this morning after door installation yesterday and overnight purge. I started the turbo at around 0.8 Torr late this afternoon and pressure came down nicely until it reached high e-4 Torr range. I'm not sure if this is normal for a wet volume or if we have a big leak. The purge air blow down dew point measured -11.4C which is relatively high (-25C or below is best). We will try to leak check tomorrow the newly installed parts (rebuilt IP11 + chevron baffle + 12" GV, new HV NEG pump + housing).

BSC10 annulus volume was pumped with turbo cart yesterday. It reached e-6 Torr quickly (indicating no o-ring leak) and then was valved out for the night (no auto safety valve). It was pumped with cart all day today and about mid day I turned on AIP. It displayed all 10 LED lights (high current/high pressure), but the top light was off (not over current). After several hours with help from cart, it did not change state. I isolated the AIP and waited several minutes - no change. We may need to replace this AIP. I think it's an original and may have been vented with air while powered ON during a door removal several months ago. I will valve in cart and resume pumping tomorrow.

TCS Chiller Pump Rebuild

The TCS chiller pump has been rebuilt and should be ready to act as a back-up now. In the future if the water pump needs to be rebuilt it uses a a type 21 shaft seal, 5/8" shaft size, 1 1/4" seat bore. The replacement o-rings are 4x dash number 012 and 1x dash number 242. It also uses a standard external retaining ring with a 5/8" OD. Use a light grease to seat the shaft seal, or else the rubber will tear (voice of experience here, oops).

 The chiller is currently running in a small closed loop to see if any leaks develop overnight, it is on the mezzanine with its other siblings.

Today's HAM5 incursion

Nutsinee Kijbinchoo, Terry McRae, Jeff Kissel, Keita Kawabe, Daniel Sigg, TJ Shafer, Sheila,

• When we entered HAM5 we found that the beam from the OPO, which was centered on the apertures in HAM6 in preparation, was hitting the ECD bracket on ZM2 (photo).  
• We decided not to translate ZM2.  Corey Austin had looked at a Zeemax drawing of the location of ZM2 and found that based on the nominal locations in solid works, we could increase the aperture on the face of ZM2 by 3 mm if we moved ZM2 by 50 mm in the -X direction.  Since we weren't sure that the solid works model is really showing an accurate position of ZM2, and we were short of time, we decided not to translate it this time.  Nutsinee took some photos that show the location of ZM2 more clearly than what we had before.  
• Jeff K adjusted the yaw of ZM1 to get us the best clearance we could on both sides of ZM2.  (In the attached photos you can see our measurement technique for the clearance on the -x bracket and +x bracket.  The edge of the card is against the edge of the bracket in both photos, and the bean is just a bit further from the edge than the T on the card in both cases.  From the edge of the card to the T is about 1+1/16th inches, so the beam is about 1.1-1.2 inches from the inner edge of the slots on the bracket.  Based on the drawing of the new ECD assembly and the bracket drawing, the inner edge of the bracket is 0.61 inches from the inner edge of the slots, so the beam is about 14 mm from the inner edge of the bracket on each side if we are looking at the optic face on. 
• With this we only needed a small adjustment of ZM2 yaw to hit the center of the two fixed steering mirrors on the OFI.  We saw the beam hitting the aperture on the rear of the SRM baffle low and in the -x direction, so we adjusted both pitch and yaw on the second OFI steering mirror (the -y  one).  With this mirror we were able to get the beam into HAM6.  
• We used the SRM alignment found on Feb 8th
• We couldn't see the beam in transmission of OM1, so we decided to center it on OM2 and we think that this should be good enough to allow us to co-align the squeezer and the IFO beam once we have the pico. (before photo shows location of beam on OM2 before pico was swapped in.)  
• After we had that alignment we swapped in the picomotor which was already mounted.  Keita adjusted this by hand so that the beam came out very nearly centered on OM2.  We made the final adjustment of the beam location on OM2 using the new picomotor (after photo).
• We swapped the brackets on ZM2 without encountering any problems.  
• After we were out of HAM5, we roughly placed the apertures in HAM6 on the new beam alignment, in case we have any difficulties finding our beam once we are pumped back down. 
• TJ, Jim and Jeff K are right now checking transfer functions in HAM5, found that the OFI osems weren't centered, TJ and Jeff K have gone back to center them. 

yak

Vacuum summary for the day

Gerardo, Mark D. Tyler, Chandra

Corner

• Torqued IP5 studs metal on metal
• Got XBM & YBM on turbos/scrolls and leak checked:
  • IP6 valve (beam tube side) and PT-170 gauge with background at 3.1e-9 Torr-L/s (there will be no IP6 installed here until rebuilt unit ships from vendor in May)
  • IP5 + valve with background at 2.0e-9 Torr-L/s. We had some troubles pumping down IP5 with pump carts. The little red "cube" kept tripping, even with a 'hung' turbo. The trusty old pump cart survived the long wait through ~10 Torr. We thought we had a big air leak somewhere, but all checked out. IP5 isolation gate valve was left open to pump down with main YBM volume
  • New GV on XBM turbo is leak tight with background at 3.3e-9 Torr-L/s
• Vented vertex
• Loosened bolts on IP3 to prepare for R&R tomorrow (no, not that kind of R&R). Left its isolation GV open
• Loosened HAM5 doors bolts

EY

• Torqued IP11 stack studs metal to metal
• Installed BSC10 door and successfully pumped down annulus (i.e. no leaks)
• Turned on QDP80 to warm up
• Purge air scroll #4 is loud, so we turned it off for now. Might be a bad one-way valve
• Connected charged battery pack for turbo

We will start roughing down EY tomorrow.

Prior to corner station vent, high voltage has been turned off (as per items mentioned in M1300464).
    - ESD driver
    - Fast shutter de-energized
    - OMC's PZT actuator drive
    - Picomotors
ITM Ring heater's measured power is zero (power is off at chassis), and I've changed the requested power to zero via MEDM.

The net pump speed of this diaphragm backing pump is "much" less than what we are used to. I used this portable pump station for the first time the other day to evacuate 4 lengths of 1.5" flex line + the volume between IP6's closed GV and the zero-length reducer and it took "minutes" not seconds.

SR3 ROC Heater: Trouble closing OMC angular loops

Dan B, Terra H. Alexei C., Seb N,  TVo

We attempted to try to characterize the SR3 RoC heater's modematching range by mode scanning the OMC.  However, we had trouble getting the OMC alignment loops to close. Even though the alignment on the QPDs using OM1 and OM2 were relatively close to the loop offsets to start, the OMC SUS would rail and push the beam off of the QPDs.  We've had this problem before but we couldn't figure out what the issue was this time around.  Although we got flashes in the OMC, the misalignment was not good enough to get a proper measurement so we'll have to try again some other time.

FYI: For the upcoming vent, we've turned off the SR3 driver and left the IMC locked with 2.5 W input.  Also, a lot of the digital cameras weren't loading for some reason, even after requesting a reboot.