TITLE: 08/24 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 46Mpc
INCOMING OPERATOR: Patrick (subbing for Cheryl)
SHIFT SUMMARY:

Shift mostly quiet until TCSX acted up. Aiden is making an aLog that includes the latest power adjustment made to recover the original range. I'm not feeling well this morning so Patrick has generously granted me early leave.
LOG:

Verbal Alarm at 13:25

09:29UTC "TCSX CO2 LASER output off" verbal happened. After a trip into the LVEA to find the FLOW light tripped on the controller I went into the mezzanine to check the chiller which was NOT tripped. I went back down and reset the controller and everything looked ok except for some SDF diffs in TCS_ITMX_CO2_PWR,TCS_ITMX_CO2, and DIAG_SDF nodes. I called Jason on the phone and he didn't have to much to say about some new Guardian stuff that has been added. I accepted te DIFFS that were showing and took a couple of screenshots.

10:32UTC LASER won't stay locked. It keeps dropping/searching/locking...rinse, lather, repeat. When it locks, the ready bit goes GREEN and I set the Intention bit but it just keeps falling out over and over again.

10:35UTC maybe it will hold this time?

10:46UTC nope

TITLE: 08/24 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 50Mpc
OUTGOING OPERATOR: Jeff
CURRENT ENVIRONMENT:
    Wind: 1mph Gusts, 0mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.08 μm/s
QUICK SUMMARY:

Continued triple coincident observing during first half of shift. No issues or problems to report. 

TITLE: 08/23 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 50Mpc
INCOMING OPERATOR: Jeff
SHIFT SUMMARY:

Nice quiet shift with H1 being locked for about 23hrs (current Triple Coincidence is over 9hrs).  Winds picked a little for 2nd half of shift and there was an EQ from Mexico that we rode through (as well as L1).
LOG:

• 15:44 Elec cart to Warehouse (Karen)
• 17:34 Tour leaving Control Room & going to X-arm Bridge (Greg M.)
• 18:10 An RV was seen leaving the LSB---Bubba informed me an RV made it through the gate (without my knowledge) earlier this morning and parked there...I'm assuming it turned around and went to the LSB parking lot.
• 18:13 CP1 bumped (Chandra, John)
• 18:41-19:43 Chandra running to EY
• 20:00-22:00 Squeezer spring work in Optics lab (Thomas, TJ)
• 22:17-23:17 GRB stand down alert confirmed & discussed between LLO & LHO.

T. Vo, T. Shaffer

First update: TST11356

Yesterday the blade tooling came from LLO (thank you Stuart!), so today I grabbed T. Vo to give me an extra set of hands for unpacking and pulling the blades. We had no issues and are now waiting for the wire before we pull that and suspend it. The only thing that we did slightly different from E1600174 was instead of folding up a wipe, we just placed a single layer under it. We found that it made it easier to see how much we were moving the screw without it bunching up underneath at the same time.

Random assortment of pictures from today attached.

Tag note: I realize that I can't decide where to put this, I think it will live in the LHO alog under H1:ISC,SUS from now on unless I here otherwise.

H1 locked for over 19hrs & Triple Coincidence of 6+hrs.  Had one tour & apparently an RV roll past the gate.

J. Kissel

Took regular charge measurements yesterday. Results for ETMY are beginning to wash out what effects we thought we might have seen after the July 6th 2017 EQ -- I'd argue that it's now a toss up in terms of each quadrant whether the effective bias voltage showed a significant step, or just apparently so given the gap in the data for ~6 weeks. ETMY's worst quadrants (ETMY UL in Pitch) are now at -93 [V], which is about 25% of the applied effective bias voltage (380 [V]). However, though angular the effective bias voltage has changed from -11 [V] to -92 [V] (a change of (93-11)/380 = 21%), the relative actuation strength in longitudinal -- as measured by calibration lines, reported on the summary pages -- has only changed by 10%. 

ETMX remains at a reasonably low level of effective bias voltage, where the worst quadrants (ETMX LL and LR) are showing effective bias voltages of ~40 [V], but the mean (average of all eight measurements, 4 quadrants in P and Y) is 20 [V]. This is mildly inconsistent with what Sheila has measured recently -- -5.2 [V] -- via longitudinal drive (see LHO aLOG 38233) However, I look forward to seeing the results of the test mass discharge system, slated to be used next Tuesday (2017-08-29).

All effective bias voltages reported by the angular actuation strength have an uncertainty at the level of 1-2 [V]

TITLE: 08/23 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 51Mpc
OUTGOING OPERATOR: Ed
CURRENT ENVIRONMENT:
    Wind: 4mph Gusts, 2mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.08 μm/s
QUICK SUMMARY:

Covering for Cheryl.  Ed handing off an H1 which has been locked for 15hrs (as seen from Verbal Alarm; Lock Clock was reset with wall computer reboots).  Currently going on 2.5hrs of Triple Coincidence.

TITLE: 08/23 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 51Mpc
INCOMING OPERATOR: Cheryl (Corey subbing)
SHIFT SUMMARY:

Quiet shift
LOG:

Rai W., Mike Z., Daniel S., Jeff K., Chandra R., Kyle R. 

Today the TMDS Gas Delivery Table was transported to the X-end VEA and set it up for operation.  The actual Surface Discharge Ionizer was mounted on a stand for today's demonstration purposes.  Nominally, it would be mounted to the dedicated TMDS port of BSC9's East Door.  The Vent/Purge air supply was ran and dry air supplied to the TMDS setup.  Prior to exposing the Ionizer to the conditioned air supply, the plumbing connection at the Ionizer was decoupled and connected to a test setup that facilitated the measurement of > 0.3 micron and > 0.5 micron particulate in the conditioned air. The air line was then re-coupled to the Ionizer.  An approximate 50/50 mix of Ethylene Glycol to Alcohol along with "chunks" of dry ice was used as a cold trap to the path.  

Rai W. gave an overview of the theory and a detailed tutorial as to the operation of the setup.  Daniel S. and Jeff K. noted details related to the ion production while Kyle R. and Chandra R. noted detail related to the vacuum related issues.  

The Ionizer setup performed satisfactorily (with caveats) at making comparable amounts of positive and negative ions.  

The plan now is to connect the Ionizer to BSC9 and perform an actual discharge of the ETMx during next Tuesday's maintenance day.  

My notes from today; 

1. Oscillations were noted and attributed to electronics design -> Daniel S. will address.  
2. Rai W. requested that we provide a means of support to take the weight of the Ionizer when mounted to the 1 1/2" valve on the BSC -> Kyle R. will address.  
3. Confirmation of the preferred means to pump to rough vacuum the X-end VE between cycles of discharge gas admission -> Chandra R. will address.