[Corey, Betsy, Fil, Peter, Calum, Stefan, Koji]

Summary

- The ISC portion of the HAM6 vent work has been completed.

- Shield isolation of the in-vacuum cables was confirmed.

- The fast shutter was reinstalled on the table after some modifications.

=> Ready for the SEI mass balancing and other exiting procedures. OMC PZT HV is still on. Remeber to turn it off before pumping down.

Some details

- Shield isolation: It is always confusing to check the shiels isolation on HAM6 because of several reasons.

1. All the OMC cables (OMC DCPDs, OMC QPDs, and OMC PZT) are sharing their shield on the OMC breadboard. Therefore one needs to remove the related three DB25 cables from the flange when the shield shorting is checked for them.
2. The beam diverters connects the shields of their cables shorted to the ISI table. Therefore the shorting needs to be checked with the beam diverter disconnected at the mighty mouse connectors. When the test is done, the connectors need to be restored and the function of the beam diverters should be checked again.
3. The picomotors don't short the shields on the table. Check them as usual.

We initially had several cables shorting to the chamber but all of them but one happened at the slack of the cables right inside of the flange. The last one happened on the DB25 cable before it climb up to the vertical wall of the ISI.

- The fast shutter modification / reinstallation

(Photos are supposed to come later.)

1. The new bobbin came in for replacing the moving part of the shutter.
2. The wire stays were modified to have the bobbin wires more relaxed. Also it should allow us to have more clearance of the wires from the beam towards OM1.
3. To allow this modification, the direction of a coil wire (shorter, negative, lower slot) in the terminal block was flipped (Corey's attachment 1).
4. The shutter was placed on the ISI table. Then we found that clearance of the wire is in fact poor. We bent one of the wire clamps (Corey's attachment 2: The clamp at the right side of the shutter) and also adjusted the wire length to have 8~9mm clearance from the beam now. (Corey's attachment 3: The clearance does not look great in the photo but in reality the beam is clearly away from the wire.)
5. The shutter function was tested with the shutter test controller. No HV was used during the test.
6. The beam alignment from the shutter to the gold coated tube was checked. The beam is on the tube but close to the top edge of the tube aperture when the shutter mirror wobbles. We believe this does not create any issue even if the beam falls off from the dump as there is nothing sensitive behind the tube beam dump.
7. Related to the entry  LHO ALOG 28958, we found the shutter height was too low. The distance between the top of the shutter mirror and the beam was ~9mm. The nominal distance is 6mm. We adjusted the height of the shutter to have the nominal height. (Corey's attachment 4)

Bubba, Jim, Dave:

UNIT-1 cooling in the MSR developed a very noisy fan this afternoon. It has been opened as FRS-6039. This system was turned off and the other two units had their set points reduced from 70F to 67F after the room became noticably warmer.

The room temperature can be monitored via the Beckhoff channels H1:pEM-C_MSR_RACK[1,2]_TEMPERATURE. It shows the temp increased from 18C to 26C (64F to 78F).

Completed the timing FPGA upgrades

Daniel, Ansel, Richard, Jim, Dave:

The remaining timing systems were upgraded to the "non-blinking" FPGA code. The units upgraded today were: master in MSR, two fanouts in CER, fanout in EY (EX was upgraded last week). All front end IO Chassis were power cycled for the upgrade.

Prior to the power down of the h1oaf0 chassis, the TCS chiller control cables were unplugged from the chillers (located on the Mech Room Mezzanine). These were reconnected when the reboots were completed.

Prior to the power up of the SEI IO Chassis, the AI chassis were powered down following the procedure in DCC-T1600332. Similarly, the AI chassis for ISC and PSL were powered down prior to IO Chassis power up. The AI chassis were restored to power when all front end code was running.

All front ends in MSR, EX, EY, MX and MY were power cycled. IRIG-B in MSR was power cycled, IRIG-B at EX, EY were not.

Removal of Binary IO Cards from SEI H16 and H23

Richard, Fil, Jim:

unused BIO cards were removed from the IO Chassis for h1seih16 and h1seih23

Addition of Binary IO Card into PSL

Richard, Jim, Dave:

A new BIO card was added to the IO Chassis for h1psl0. This is the first BIO card for this system and will be used for next week's new ISS tests.

New SUS QUAD code

Jeff, Jim, Dave:

Jeff completed his new QUAD code install on h1susitmx, h1susitmy, h1susetmx, h1susetmy. DAQ restart was needed to add slow channels.

Chandra R, Gerardo M

Removed and replaced annulus ion pump for GV3.  after replacement, we pumped on the system with an aux-cart for 2.5 hours, then the ion pump was able to support the system on its own.  Work done under WP 6064.
We used the crane to support the annulus pipes, the crane was returned to its parking spot and turned off.
The aux-cart was turned off and removed from the annulus system and moved back to its parking spot near HAM7.

Today I leak tested the entire Vertex RGA assembly simultaneously via encapsulating all of the components within a single bag and while the Cal-Gas isolation valves were open.  The motivation for this is the result of having detected Argon in the RGA scan but not having been able to find a leak to atmosphere via testing the joints individually.  Six bag penetrations were necessary (the 2 1/2" Vertex isolation valve, the pump port used to connect the leak detector, the pump port isolation valve, two lines for the two O2 sensors used and a line for the helium) and these were sealed off as best as could be done via tape.  The helium line entered the bag at the top of the bag and the two lines for the two O2 sensors (w/internal pumps) entered the bottom of the bag.  A very large (excessive) volume of helium was applied and a large flow could easily be heard as could the obvious inflation of the bag etc. (recruited Chandra to witness this spectacle!).  No response was observed at the LD during the application of helium.  An external fan sitting on the floor was utilized to keep helium from entering the LD's exhaust.  The helium baseline was off scale low during testing.  Also, the external helium calibration bottle was valved-in prior to changing the test conditions or cycling any internal valves to demonstrate helium sensitivity/calibration and show that the mass spec. was sampling at the test port.  

Note:  Both of the O2 sensors used had expired and non-functioning chemical sensors.  Both displayed on error to this effect upon startup but then displayed believable values of 20.2% O2 and 20.4% O2 after the errors were cleared.  I demonstrated their non-functioning status via exhaling into the inlet tubes and noting that the %O2 displayed did not react.  Thus, I could not measure the O2 concentration at the bottom of the bag but they still acted as pumps and provided an escape for the helium displaced air.  

State of alignment: restored and beam is in HAM6

Assistance: JeffK, Jenne

Activities:

• All front ends restarted today, recovery of input optics included the PZTs and IMs.
• I also chose to align the IMC optics, MC1, MC2, MC3, back to thei locked values at 15:00UTC today (8/9), which is actually doing a WFS reflief.
• ALL MC optics will show a change in alignment slider values - this is expected.
• After restoring PZTs, IMC locked quickly, and has been stable since.
• IMs are restored to values in alog 28016.
• JeffK restored all optics downstream of IMs.
• Beam from the PSL is slightly different than yesterday (within the normal variance), and ITMY is 0.5urad different in yaw - talked to crew at HAM6 so they're aware.
• Once the PSL beam was making it to the OMC, OM1, OM2, and OM3 were moving a lot - tracked down to an chassis being turned off, now restored.
• OM1-3 needed some alignment - values are from 15:00UTC yesterday, when work ended - image is attached.
• SR2's alignment is a bit different than yesterday's by 7urad pitch and 14urad yaw - alignment yesterday 2553.7 pitch, 744.9 yaw - texted to Corey if they need to set it back.
• OMC breadboard at 15:00UTC yesterday was -0.15 pitch, -0.13 yaw - also texted to Corey if needed.

I was taking some measurements on the BSCs earlier today, and I noticed a feature at about .73 hz in the OAF CARM and DARM suspoint channels that didn't show up in the OAF MICH suspoint spectra. I then looked at the GS13s on ETMY and there is a pretty sharp feature that seemed to have appeared after recovery this morning. A quick cruise through the Summary pages, though, showed that there is some intermittent feature that  has been there off and on since at least the end of June. I thought it might be the RX/RY loops on ST2 I've been trying, but turning those off had no effect. I then took the ISI St2 to damped, but the feature was still there. Jeff said that the TMS has a resonance about .73 hz, so I turned the damping off and that made the feature much worse, but it also rang up a bunch of other features. Whatever this is, it has to be very intermittent since I hadn't noticed it before today, and I look at ETMY pretty frequently, and I've never noticed it before.

Attached plot is the ST2 RX GS13, which showed this the strongest, though RY and Y also saw it. The CPS also saw this in all configurations, even damped. The TMS sees this, though not as big, and the quad sees even less and only in pitch. ST1 of the ISI does not see this.

Title:  08/09/2016, Day Shift 15:00 – 23:00 (08:00 –16:00) All times in UTC (PT)
State of H1: IFO is unlocked. HAM6 Vent, Tuesday maintenance day
Commissioning: 
Outgoing Operator:  N/A
 
Activity Log: All Times in UTC (PT)

15:00 (08:00) Start of shift
15:00 (08:00) Vern – De-energized PSL rotational stage 
15:24 (08:24) Carlos – Going to roof to clean sky camera lens cover
15:30 (08:30) Carlos – Back from roof 
15:36 (08:36) Gerardo – Going to GV3 to work on Ion Pump replacement – Craning (WP #6064)
15:41 (08:41) Krishna – Going into LVEA to work on compact BRS
15:45 (08:45) Karen – Going to clean End and Mid Y
15:45 (08:45) Christina – Going to clean End and Mid X
15:59 (08:59) Kyle – Going to End-Y to turn down RGA bake 
16:15 (09:15) Richard – Going into CER to pull binary I/O cards WP #6067
16:16 (09:16) Hugh & Marc – Replace ITMX Corn2 Coil Driver WP #6063
16:17 (09:17) Jim B. & Dave – Going to CER to pull binary I/O cards WP #6067
16:22 (09:22) Corey & Filiberto – Going to HAM6 for ground checks
16:25 (09:25) Norco N2 delivery to End-Y CP7
16:31 (09:31) Daniel – Going to End-Y to work on Timing change WP #6066
16:34 (09:34) Christina – Finished at End-X – Going to Mid-X then to the CS
16:36 (09:36) Karen - Finished at End-Y – Going to Mid-Y then to the CS 
16:39 (09:39) Jim & Ian – Going to End-X
16:39 (09:39) Kyle – Back from End-Y
16:42 (09:42) Betsy & Steven – Going into Optics Lab
16:46 (09:46) Dave B. – Going to End-X, Mid-X, End-Y & Mid-Y for reboots WP #6066
16:48 (09:48) Beverage service on site to stock machines
16:58 (09:58) Daniel – Back from End-Y
17:02 (10:02) Jim & Ian – Back from End-X
17:08 (10:08) Norco N2 delivery to LVEA CP2
17:10 (10:10) Cleaning service on site to change out mats
17:25 (10:25) Hugh – Going to End-X and End-Y to check HEPI Pumps
17:35 (10:35) Richard – Going to HAM6 area for ground testing
17:43 (10:43) Richard – Out of the LVEA
17:56 (10:56) Dave & Jim – In the CER for PSL reboot
18:04 (11:04) Kyle – Going into LVEA HAM4 area RGA WP #6068
18:06 (11:06) Joe – Going into LVEA battery and wash station checks 
18:07 (11:07) Dave B – Going to Mid-X
18:11 (11:11) Hugh – Going to HAM6 to re-payload ISI
18:18 (11:18) Calum, Peter, Betsy, Corey – Going into LVEA to work on shutter
18:23 (11:23) Joe – Out of the LVEA
18:30 (11:30) Richard – Transitioned LVEA to Laser safe
19:06 (12:06) Gerardo & Chandra – Out of LVEA – Crane is parked & AUX cart is running
19:22 (12:22) Corey – Out of the LVEA
20:15 (13:15) Corey & Filiberto – Going to HAM6 for grounding checks
20:42 (13:42) Betsy – Out of LVEA
20:45 (13:45) Koji – Going to HAM6
20:55 (14:55) Gerardo – Going into LVEA to check on Ion Pump at GV3
21:30 (14:30) Krishna – Taking student on tour of the LVEA
21:37 (14:37) Steven – Going into the Optics lab
22:01 (15:01) LVEA transitioned to Laser Hazard
22:02 (15:02) Betsy – Going to HAM6
22:21 (15:21) Cheryl – Going to HAM6
22:30 (15:30) Cheryl – Out of the LVEA
22:40 (15:40) Calum & Travis – Going to HAM6
22:54 (15:54) Gerardo – Going to shutdown AUX cart at GV3


Title: 08/09/2016, Day Shift 15:00 – 23:00 (08:00 – 16:00) All times in UTC (PT)
Support:  
Incoming Operator: N/A

Shift Detail Summary: IFO is unlocked due to HAM6 vent for OMC repairs.
Tuesday maintenance day. Close out work continues at HAM6. 

[Stefan, Jenne]

We have been looking at different PD signals to see if we can set up a guardian check that the fast shutter indeed closes upon lockloss.  Right now we don't have a good way to code it in guardian yet, so Stefan has made a template for the lockloss script that we can run every lockloss. 

Note that AS_C and ASAIR_B are both before the shutter, so should not see a change in light upon shutter close.  AS_A, AS_B, and OMC_DCPD are all after the shutter, and should lose light if the shutter successfully closes. 

For now, we have some DTT snapshots.  NDS2 is under maintenence, so not all plots have the same traces, sorry.

• The first one (2016_08_01_0843utc.png) shows an example of the shutter not closing. Signals are scaled arbitrarily to make them all visible. In this particular case, the wire was probably already broken, because we send the trigger signal requesting the shutter to close, but it doesn't actually close (NB the shutter state is readback by Beckhoff, so the timing of that signal can only be trusted to within ~1 sec or so).  All of the signals except for the DCPDs saturate, but it's clear (particularly in comparison to the next 2 plots) that the light doesn't get shuttered.  Note that the OMC was already offline at this time, so the OMC DCPD signal isn't super useful here.
• The second plot (2016_03_08_0430utc.png) shows a time from before the April HAM6 vent, so a time when the shutter was definitely working. In particular, note that the AS_A and AS_B sums get cut off at 5.4sec.  This is the shutter closing.  However, there is some kind of bounce or something, where the shutter allows light through for another 20 msec or so before closing and staying closed. 
• The third plot is the most clear version of the shutter working (2016_08_01_0020utc.png), showing again AS_A and AS_B sums getting cut off.  You can also see ASAIR gets the true peak of light after the shutter does the 'bounce and re-close' thing. 
• The fourth plot (2016_07_22_0745utc.png) shows a time when the shutter's trigger failed, and so the shutter didn't close.

Once NDS2 is back online, we'll post a few more plots of a few more locklosses, with both ASAIR and OMC DCPD included. 

Also, we don't want to use signals such as the OMC input pointing QPDs that are whitened for this fast information. 

J. Kissel
ECR E1500045
FRS 6014
WP 6051

I've completed the installation of the infrastructure for individual switch-ability for all QUAD's PUM / L2 actuation stage coil drivers. This stage should now have the same functionality as the BS M2, and all of the M3 stages of the HSTSs (the MCs, the PRs, and the SRs). I've created EUL2OSEM burt files for the walk through switching the state of each coil, so the only step that remains to take advantage of the new infrastructure is to modify the ISC_LOCK guardian's COIL_DRIVERS state to include the QUADs.

Details:
-------------
This update includes (this should double as an installation checklist for LLO)
- Updates to the ITM and ETM QUAD library parts: (see screenshots in LHO aLOG 28906)
      /opt/rtcds/userapps/release/sus/common/models/
      QUAD_MASTER.mdl                  << Modified the BIO block to use the new Individually Controlled 
                                          PUM library block, arranged connections from BIO to L2 
                                          blocks accordingly
      QUAD_ITM_MASTER.mdl              << (same as above) Modified the BIO block to use the new 
                                          Individually Controlled PUM library block, arranged 
                                          connections from BIO to L2 blocks accordingly
      STATE_BIO_MASTER.mdl             << Created new library block for individual control of PUM driver
      FOUROSEM_DAMPED_STAGE_MASTER_WITH_DAMP_MODE.mdl     << Modified COILOUTF bank to accept individual control
                                                       and switched EUL2OSEM matrix from static to ramping
- Corresponding updates to the impacted ITM and ETM QUAD MEDM screens,
      /opt/rtcds/userapps/trunk/sus/common/medm/quad/
      SUS_CUST_QUAD_OVERVIEW.adl
      SUS_CUST_QUAD_ITM_OVERVIEW.adl
      SUS_CUST_QUAD_BIO.adl
      SUS_CUST_QUAD_ITM_BIO.adl
      SUS_CUST_QUAD_L2_EUL2OSEM.adl
- Restored the nominal L2 EUL2OSEM matrix values, given the new channel names from the ramp matrix part
- Installed a ramp time of 8.0 sec for the EUL2OSEM matrix, as is the case for the other Triples that have been modified previously
- Restored the nominal coil driver state and test/coil enable for each coil individually (LHO likes these to be in State 2 (acq ON lp OFF) in the DOWN state, currently)
- Creating new burt configuration files for the EUL2OSEM matrices as each coil is turned off. These now live and been committed here:
      /opt/rtcds/userapps/trunk/isc/h1/scripts/sus/
      ?tm?_l2_out_ll.snap
      ?tm?_l2_out_lr.snap
      ?tm?_l2_out_normal.snap
      ?tm?_l2_out_ul.snap
      ?tm?_l2_out_ur.snap
- Reconciling the SDF system such that 
      - All new EUL2OSEM matrix channels are accepted and monitored
      - All new individual BIO channels are accepted and monitored
      - The EUL2OSEM ramp time has been accepted and monitored

This closes out the above mentioned work permits and FRS for H1.

No resets needed, all saturation counts 0.

FAMIS# 7066

   Took pet swipe in HAM6 on 08/02/2016 when doors were removed. Swipe was from -X side of OMC weldment to side of table, (see photo). 

   At the same time, removed 4" witness wafer from HAM6. Sample has been prepared for analysis (DCC T1600336). See photo for location of wafer.   

Krishna

I'm driving a piezo stack placed under the c-BRS platform with a function generator (drive frequency 5-200 mHz, 10V pk-pk) located on the floor in the CER. This setup is temporary and will be removed in a few hours.

There are no significant changes from last week. OSC DB3 still showing incorrect current measurement and AMP chiller flow rate showing very slkow steady decrease.

[Betsy TJ Koji]

We measured the optical powers in HAM6 before OM1-3 and OMC as well as at the transmission of OM1 and OM3.
Taking the ratio of these powers and AS_C QPD SUM, we get the calibration of the optical powers in HAM6.
This will be used for throughput calculation of the entire IFO output optics.

The ratio is

(Power into HAM6)/(AS_C QPD SUM) = 0.0162 +/- 0.0005 [mW/cnt]

Caveat: Our measurements were dominated by the systematic error of the power meter (as usual). Estimated size of the error is +/-3%.
Without having a better power meter, I don't expect I can improve this number.

As you can see in the spread sheet, each measurement has small statistical error like 0.1~0.5%. The numbers for AS_C QPD SUM was taken by the data downloaded from CDS.

However, two measurements of the optical power before OM1 (blue) showed 5% discrepancy. Also tracing the power along the main HAM6 path, the fluctuation of the power measurement (blue plot) exceeds the expected reduction of the power (orange plot) by measured transmissions. (Note that OM1 and OM3 has 800ppm and 1.6% transmission, that is consistent with the measurement in 2015.)

Therefore, this big fluctuation was concluded to be a systematic error of the measurement, particulary of the power meter (Ophir diode type sensor head), considering the stability of the AS_C QPD SUM.
From the two measurement of the optical power before OM1, and the plot, the systematic error was estimated to be +/-3%.

SInce the ETMs were available, I carefully tuned the PUM to TOP mas offloading gain for PIT and YAW. To do this, I drove the PUM at 0.1Hz with 20000cts on the L2_LOCK_[P/Y]_EXC, and set the gain on the TOP mass to exactly cancel the signal in the optical lever.

For YAW this can easily be done with sub-percent precision. The PIT TOP/PUM ratio features a lag filter with a complex pole zero douple-pair at 0.52Hz and 0.56Hz, which can be seen in the QUAD model. I designed a lead filter with those frequencies, but Qs low enough to match the phase at 0.1Hz exactly. The corresponding lead filter is in the M0_LOCK_P FM7 module:
   zpk([0.325+i*0.405925;0.325-i*0.405925],[0.349999+i*0.437149;0.349999-i*0.437149],0.999999,"n")

The regquired gains in the M0_LOCK filter modules were:

ETMX PIT    898      *1e-6
ETMX YAW 1428.7  *1e-6
ETMY PIT    1294    *1e-6
ETMY YAW 1650    *1e-6

I put gain of 898, 1428.7, 1294 and 1650 into the M0_LOCK FM6 modules. By selecting FM4, FM5, FM6 (and FM7 for PIT) this implements a xross-over at exactly 0.1Hz. (pictues).

The same has to be done for the ITMs, and the guardian has to be updated to use those filters.