New Septum Viewport Assembly

(Travis S, Betsy W, Gerardo M)

Assembly of the septum viewport was completed this afternoon after a slight glitch with one of the o-rings, somehow it managed to squirt out, removed and then replaced such o-ring with a new one.  Assembly was completed per procedure E1100484.

Leak testing was done after, with a background of 0.3E-10 torr-L/s at the leak detector. Using a rate of 1 LPM of helium at the rotometer the background went up to 5.5E-10 torr-L/s.  As I returned the helium wand to it's source I noticed that the reading at the rotometer was now at 0.4 LPM.  I wanted to do another leak check.  However I managed to keep the He on the upper joint for to long that I managed to saturate the o-rings with He.  The leak detector background went up, so I waited.

Now after performing a second test, this time with a background at the leak detector of 5.0E-10 torr-L/s I tested the different joints in the viewport and the background at the leak detector went up to 5.5E-10 torr-L/s, this means that the viewport passed it's leak test.

Heading home now.

SQZ Controls Chassis 3 Modified

WP 8371

SQZ Slow Controls Chassis 3 modified with new Beckhoff controls for new AM AOM amplifier per E1600386-v3.

D1600509 Serial Number S1700267

F. Clara, D. Sigg

PSL/ALS fiber pick-off work complete for the day

Fil, Marc, Jason and I are out of the LVEA.

 

Following on from alog 52292:

 

We have a power transmission of 82% through the fiber (50mW in, 41mW out), as measured in the PSL. We still need to re-measure the transmission after feeding it through to the electronics racks by ISCT1. The beam into the fiber pick off is currently blocked inside the PSL.

 

We have aligned a PD (Thorlabs SM1PD1A) behind the steering mirror into the fiber. The mirror is 98.4% reflective, and the PD has a coupld of ND filters in front of it. With 50mW incident on the fiber the PD was reading roughly 200mV. The cable to this PD was also fed out to the racks.

 

XBM turbo

{Chub, Jordan, Chandra}

We are in the process of replacing XBM turbo. Decoupled old pump and removed the six way cross that is needed for new pump. Cross is currently finger tight on turbo fixation (on the one and only rotatable flange in system). Will resume Monday with bolting to 10" gate valve and populating ports. Kyle was able to route 208V power to stand to test turbo ahead of time. It spun up suspiciously slow, but did come to full speed. May be a function of foreline pressure or a function of hunger due to late lunch. Thanks to Tyler for helping us rig the new stand and crane over XBM spool.

YBM pump down

Started pumpind down YBM this morning with temporary adapter cable that Kyle made to send QDP80 motor run signal to turbo station for safety valve interlocking (old pumps using new signal cable). Pressure is currently 0.9 Torr. Will valve out for the weekend and resume pumping Monday morning.

AS Septum Viewport Confirmation - PRE Septum Assy swap from D1101092 to angled assy

Today, Keita, Jenne, TJ, Nutsinee, Rahul, and I went in to inspect the beam paths that come from the AS viewport and to components towards the OMC.  This is a pre-check of the beam location prior to the planned viewport swap early next week.

I verified that the viewport assembly does in-fact look to be the expected D1101095 s/n 003 assembly - I could see the D1101005 stamp (but no s/n) on the viewport glass itself, and the VP metal clamp part was labeled D1101115 s/n 007 - all consistent with the ICS assembly records which state the location of Septum Output.  The D1101005 stamp on the optic was at the bottom of the barrel, which according to the drawing means the arror (thick part) is on the 3 o'clock position, as previous installation alogs report.  Good.

The location of roughly where the beam comes through the VP is shown in the attached picture.  Because we did not want to get the card too near the viewport surface, it the view is a little bit subject - I tried to get the camera view roughly at the beam height.

Jenne then steered the SM to center on the AS_C QPD.  Things looked pretty aligned along the path.

Pictures 3,4,5 are of beam location pitch and yaw views in front of OM1, and then location of beam in High Powered beam dump aperture.

 

DQ Shift: Sep 23th 0:00 - Oct 1st 24:00 UTC

DQ Shifter: Yanyan Zheng
Fellow(s):Dripta Bhattacharjee

• The average duty factor is (87.7+49.9+72.6+75.2+87.6+99.9+74.6+77.8+55.8)%/9=75.67%
  • Lockloss:2+3+2+3+2+1+3+1=17
• The average BNS range is ~110Mpc.
• Noise:
  • 48Hz noise line can be seen on Monday, Tuesday, Wendesday.
  • Excess noise with ~20-60Hz were presented on Monday, Tuesday, Wednesday, Thursday,Friday and Tuesday(Oct 1st). They might come from the earthquake/accoustic/wind.
  • High frequency noise line at 2000Hz occurred on Monday.
  • Violin modes at 500Hz and 1000Hz can be seen for several hours everyday.
• Dechar
  • Hveto: H1:LSC-POP_A_LF_OUT_DQ is the always the 1st round winner except on Wednesday and Tuesday(Oct 1st).
  • On Wednesday, the 1st round winner: H1:PEM-CS_RADIO_LVEA_NARROWBAND_2_DQ and PEM channels won in the first 6 rounds.
  • On Tuesday(Oct 1st),1st round winner is H1:ASC-AS_A_RF45_Q_YAW_OUT_DQ. This channel picked more of the loud noise.
  • On Friday, the winners from round 2 to 6 are related to the ASC channel. And they picked more of the excess noise.
• Calibration lines: On Monday, Pcal X at high frequency looked different. Otherwise,pcal X and pcal Y looked normal.
• Spectral lines: No plots can be seen on Tuesday(Sep 24th). For Semilog ratio, It looked different from Thursday(Sep 26th).

More details can be seen at https://wiki.ligo.org/DetChar/DataQuality/DQShiftLHO20190923.

h1lsc0 timing glitch, all models on lsc and oaf1 restarted

Another occurance this afternoon of a h1lsc0 timing glitch while there was activity in the CER. As before, the IOChassis itself was not impacted, only its timing slave unit which is independently powered. I restarted all the models on h1lsc0 and h1oaf1 (OAF1 tripped because it is timing slave to LSC). Sequence was: stop all LSC models, stop all OAF1 models, start all LSC models, start all OAF1 models.

I then reset the DIAGs on all front ends, cleared the DAQ CRC counters. Within a few minutes the CW hardware injection restarted, all is now GREEN.

Shift Summary - Day

TITLE: 10/04 Day Shift 15:00 – 23:00 (08:00-16:00), all times posted in UTC

STATE of H1: Planned Engineering

INCOMING OPERATOR: None

SHIFT SUMMARY: Quiet engineering day, XB/YB manifolds pumping down, PSL pick-off work ongoing, Ncal work ongoing, beam alignment check complete

LOG:

15:17 (08:17) Chandra to LVEA -- start pumping YB manifold

15:27 (08:27) Chris moving boxes with forklift in high bay

16:18 (09:18) Ed to LVEA -- take pictures of NHZ

16:31 (09:31) Ed out of LVEA

16:36 (09:36) Timesh to Optics Lab -- Ncal work

16:56 (09:56) Timesh to Optics Lab -- Ncal work

17:02 (10:02) Richard, Ed to LVEA -- transition to laser hazard

17:08 (10:08) TJ, Betsy, Jenne, Nutsinee, Keita to LVEA -- beam alignment check

17:11 (10:11) Chris to MX -- move equipment into storage

17:36 (10:36) Chandra to EX -- check on pump

17:44 (10:44) Sheila, Fabrice to Optics Lab -- grab fiber to ship to MIT

17:45 (10:45) Karen to MY

17:55 (10:55) Karen leaving MY

17:56 (10:56) Sheila, Fabrice out of Optics Lab

18:22 (11:22) Fil to LVEA -- answer Fast Shutter HV questions

18:27 (11:27) Richard to LVEA -- check with beam alignment team

18:32 (11:32) Georgia to Optics Lab -- search for ND 2 filters

Picometer HV turned on

18:37 (11:37) Georgia back from Optics Lab

18:38 (11:38) Richard out of LVEA

18:39 (11:39) Georgia, Jason to PSL enclosure -- ALS bypass pick-off work

18:43 (11:43) Chris back from MX

18:47 (11:47) Hugh, Charlie to Optics Lab -- calibrate fume hoods

18:48 (11:48) Richard out of LVEA -- beam alignment work done

18:50 (11:50) TJ, Jenne, Betsy, Keita out of LVEA

19:05 (12:05) Karen to H2 electronics building

19:19 (12:19) Karen back from H2 electronics building

20:19 (13:19) Fil to CER -- pull SQZ slow control chassis 3 for modifications

20:44 (13:44) Timesh, Rick to Optics Lab -- Ncal

20:56 (13:56) Georgia, Jason out of PSL enclosure

22:19 (15:19) Georgia, Jason to PSL enclosure

22:34 (15:34) Timesh to Optics Lab -- Ncal work

22:59 (15:59) Betsy to LVEA -- check work progress

LVEA transitioning to laser safe

Richard has closed the PSL shutter, is transitioning the LVEA to laser safe

HAM6 Fast Shutter

High voltage for the Fast Shutter in HAM6 was turned on this morning. Signed off by Chandra Romel for work to fall under existing WP 8394.

GV20 AIP failed

Annulus ion pump on GV20 at EX failed this morning for unknown reason. Will check it out when we can make it out there.

unbypassed FMCS corner station chiller alarm

Bubba has requested that the FMCS alarm bypass be removed. The HAM6 PT110 bypass remains in effect.

Mon Oct 14 10:16:17 PDT 2019

For channel(s):

    H0:VAC-LX_Y0_PT110_MOD1_PRESS_TORR

LVEA transitioning to laser hazard

Richard and Ed are opening the PSL shutter and transitioning the LVEA to laser hazard.

NCAL Update -- Swapping bearings and re-assesment of NCAL parts

[Rick Savage, Jeff Kissel, Timesh Mistry]

Update of NCAL progress from 03rd October 2019

Swapped Bearings

As mentioned in LHO alog 52258 (2nd bullet point), the bearing that were supplied were not the same ones as called out in the final design review document. We had ordered the correct ones and they arrived 20191003. We pressed out the old, unsealed bearings, and pressed in the new sealed bearings (figure 1). Whilst the bearing were out, we took the opportunity to clean up the inner surface of the bearing housing. There appeared to be some type of adhesive between the bearing outer surface and the housing inner surface.

Marked Rotor Holes

We used a permanent marker to re-numbered the holes on the NCAL main rotor (figure 2) since the old number were removed during the cleaning process. In addition, we etched a number 1 into the rotor to aid with re-acquiring the holes allocation should the pen marks become un-readable (figure 3).

Ops Day Shift Transition

Ops Shift Transition: 10/04/2019, Day Shift 15:00 – 23:00 (08:00-16:00) - UTC (PT)

State of H1: Planned Engineering

Intent Bit: Commissioning

Weather: 0-5 mph wind

Primary 0.03 – 0.1Hz: 0.01 um/s

Secondary 0.1 – 0.3Hz: 0.1 um/s

Outgoing Operator: None

Quick Summary: Cleaning crew in LVEA, no other LVEA work currently

XBM pump down

Resumed XBM pump down today by valving the QDP80 back in. At about 500 mTorr, spun up turbo and pressure fell to mid -4 Torr range within a few hours.

Needed custom adapter cable used at XBM for YBM turbo to start its pump down (for safety valve engagement) and in the process of swapping cables at XBM turbo station, the QDP80 tripped. Scroll was running and turbo was in local mode, anticipating a trip, but I forgot to close the QDP80 manual valve, so there was some backstream flow that caused the turbo to trip from overpressure. Thankfully the 10" isolation gate valve was closed the entire time, so the main volume pressure was not affected. Turbo volume pressure rose to about 10 Torr.

Upon start up after incident, the turbo pump tripped from strong vibration and won't come up to full speed. We tried several the tricks including feeding a gas load at inlet to load the bearing. This turbo has a history of failing from rotor resonance and in the past front loading with gas has helped. May the XBM Seiko rest in peace.

Pressure in XBM is currently reading 2e-4 Torr. We could leave it sit until we start pumping on adjacent vertex volume next week, by opening GV2 and combining volumes, or make an effort to:  a) install old turbo that was just removed from vertex or SS500b; or b) install new turbo station, untested (scheduled to replace this turbo in third week of vent). Will sleep on it and see how pressure rises overnight.

Processed High Frequency measurement from last few weeks of O3a

SudarshanK, JeffK, LilliS

Two additional sets of high frequency sweeps (2019-09-10 and 2019-09-22) have been  processed and included in the HDF5 file that was previously generated and describe in alog #52132. 

The resultant HDF5 file and the script used to generate it can be found here:

^trunk/Runs/O3/H1/Scripts/Uncertainty/process_allmeas_includingPCALXHFdata_writeGPRHDF5_model20190909-C.py
^trunk/Runs/O3/H1/Results/Uncertainty/O3_H1_C_GPR_20190909_nofsQcorr_fmin20Hz_lengthscaleZp5_withPCALXHFdata.hdf5

The plots are attached with this alog.