Ops Shift Transition: 06/20/2019, Owl Shift 07:00 – 15:00 (00:00-08:00) - UTC (PT)

State of H1: Locked

Intent Bit: Observing

Weather: 10-25 mph wind, cloudy

Primary 0.03 – 0.1Hz: 0.01 um/s

Secondary 0.1 – 0.3Hz: 0.1 um/s

Outgoing Operator: Jeff

Quick Summary: Locked and observing for half an hour. Wind has been high throughout the day, preventing lock, but according to Jeff it should be winding down.

   Accepted the two ASC SDF Diffs listed below, in order to get back into Observing. 

   The IFO has been down for the first half of the shift. The high winds continue with base line speeds in the mid-20mph range. There are continual gusts into the mid to upper 30mph range. The forecast calls for the winds to subside later in the evening. 

   The first half of the shift saw three earthquakes of mag 5 and larger. Went into EARTHQUAKE mode for the mag5.8 from Vanuatu. Was able to switch earthquake states while the IFO was locking without apparent problems. 

   Will try running an initial alignment and relocking when the winds lay down a bit.     

Georgia, Sheila, Patrick

Twice today we had locklosses for environmental reasons, and while Patrick was relocking we had the chance to try out the PRMI ASC.  We fixed some bugs and the guardian path through PRMI ASC should now be working.  It is still an optional path, so in ISC_LOCK if operators think that they would like to do PRMI they have the choice between the way things used to work (select PRMI_LOCKED, align by hand) and selecting PRMI_ASC, which will run the PRMI ASC (MICH and PRM loops), and wait for it to converge, and offload the ASC to the sliders.  If you select nominal low noise the guardain will then move on to DRMI. 

Laurence Datrier. Sheila Dwyer

A follow-up to alog 49682

We convolved our results for BNS range and duty cycle as a function of wind speed with wind speed frequency for O3 (data from 1st April 2019 to 2nd June 2019). We compare the average BNS range and duty cycle to the range if we were independent of the wind. In order to do this we approximated the DC and BNS range if wind-independent to wind values before there is a significant decay (usually 10th to 15th percentile). This is done for 1min max trends for the wind, and 30min max trends.

FAMIS 10514

The level appears close to the max line, so I did not add any water.

The bottom left canister is yellowed.

There are no errors on the diode chiller.

TITLE: 06/19 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Jeff
SHIFT SUMMARY: Second day of NSF review. Calibration measurements and noise budget.
LOG:

15:15 UTC NSF reviewer through gate
15:17 UTC NSF reviewer through gate
15:21 UTC NSF reviewer through gate
15:21 UTC NSF reviewer through gate
15:27 UTC Karen leaving mid Y
15:47 UTC Peter to optics lab
Jenne leading tour in control room
16:32 UTC Jenne leading tour out of control room
17:30 UTC Transitioned from WINDY to EARTH_QUAKE for 6.5 magnitude earthquake in Papua New Guinea
Lock loss
17:35 UTC Peter back
17:49 UTC Georgia and Sheila testing PRMI
18:07 UTC Restarted video0
19:35 UTC SEI_CONF back to WINDY
20:05 UTC NLN
20:08 UTC Observing
20:08 UTC Sundae to optics lab
20:31 UTC Apollo through gate
20:34 UTC Running CAL measurements
21:10 UTC Peter to optics lab
21:25 UTC Done CAL measurements
21:37 UTC Georgia running noise budget
22:29 UTC Kyle to mid Y
22:36 UTC Lockloss

20:08 UTC Accepted attached ASC SDF differences.

Attached is an image showing two years worth of scroll pump tip seal (PTFE) wear accumulation in the scroll pump used to back our VBOD RGA turbo.  Unlike our typical scroll pumps which experience viscous flow from time to time, either as the result of rough pumping a volume from atmosphere or from an introduced ballast purge, this pump has never experienced viscous throuput. 

The "amount" of wear (dust) is normal and is a function of run time.  Of interest here is the degree of accumulation and not the degree of generation. 

Note that this dust would be "blown" out of the exhaust port if/when this pump were to pump a viscous load :)

Tuesday afternoon I restarted the mx_stream process on h1susex (14:56 PDT) and h1seiex (14:57 PDT). Since that time we have had two h1seiex DAQ-CRC error events.

BTW: I'm detailing this problem on this wiki page

This is a continuation of the investigation in this aLOG comment: https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=49620

I've plotted 48 hours of data beginning at 19:00 UTC on April 25, 2019.  The goal was to capture the SR3 change noted here: https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=48787.  There is no obvious noteworthy change in the spring frequency or quality factor seen in this plot, only the usual changes in the few hours at the beginning of each lock stretch.  The last plot shows trends of DeltaL / Pcal for the same 48-hour period, comparing C00 to a calibration that additionally corrects for time dependence in fs and Q, as well as kappa_PUM and kappa_UIM.  It is consistent with the result of the previous aLOG comment, showing that compensating for more time dependence consistently improves calibration accuracy.

TITLE: 06/19 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 113Mpc
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
    Wind: 21mph Gusts, 16mph 5min avg
    Primary useism: 0.07 μm/s
    Secondary useism: 0.08 μm/s 
QUICK SUMMARY:

No immediate issues.

TITLE: 06/19 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 116Mpc
INCOMING OPERATOR: Patrick
SHIFT SUMMARY: Normal recovery after the earthquake rang down, and then we have been locked for 4.5hrs since.
LOG:

• 0710 Changed observatory mode from Wind to Lock Aquistion
• 0743 Changed observatory mode to Earthquake
• 0844 Initial alignment
• 1017 Observing
• 1121 Out of Observing, Squeezer lost lock
• 1122 Observing
• 1416 Fermi GRB with valid trigger duration, standing down.
• Karen to MY

Winds have picked back up to 30mph. 1.5hour lock. We dropped Observing briefly due to the squeezer losing lock, but it relocked quickly.

After the EQ calmed down, I ran an initial alignment and then it relocked. Accepted a few ASC and LSC SDFs.

Contractor spent the day installing new components on all eight liquid nitrogen Dewar fill lines to bring skids up to industry standard. Components include check valve, pressure relief valve, strainer, and drain valve. At their recommendation, a support stand was installed and anchored into concrete upon hammer drilling holes. Corner and end station skids were completed before noon to minimize impact on observing.

Check valve = Nibco class 200 bronze T-453-B 1.5"

Drain valve = Rego Goddard T9454 1/2" F.NPT with BK9450R stem

Strainer = Mueller Steam Specialty LF352 1.5" with non-standard 100 mesh for cryogenic application

Pressure relief valve = rated for 350 psi

Picture of CP1 skid attached.

Note:  the existing pressure relief valve just upstream of the control module safety valve on all skids, except CP1 skid, was removed to accommodate stack up length of new components