Adjusted the two mirrors directing the beam sample from the front end laser into the diagnostic breadboard.
No changes were made to any of the lenses.  A mode scan was conducted for a quick check of the status after
the alignment touch up.

   The attached mode scan report says 3.1% in higher order modes.  Which is a tad better than the scan that
was conducted last Friday.

Added ~475 ml to the crystal chiller.  This is a larger amount than normal due to a small leak in the
return side of the water manifold.  Two towels were placed under the manifold on Friday afternoon to
wick up the water.

I have modified the check_dust_monitors_are_working script to group the 0.3µm and 0.5µm lines together to make the output easier to read. In clean conditions the 0.5µm count is usually zero whereas the 0.3µm count is usually non-zero.

H1:PEM-CS_DUST_LVEA2_300NM_PCF           Channel Statistics: mean    4.92 max   20.00 std-dev    7.17 (12 hour(s) minute trends)
H1:PEM-CS_DUST_LVEA2_500NM_PCF           Channel Statistics: mean    0.00 max    0.00 std-dev    0.00 (12 hour(s) minute trends)
 
H1:PEM-CS_DUST_LVEA3_300NM_PCF           Channel Statistics: mean    4.90 max   30.00 std-dev    6.71 (12 hour(s) minute trends)
H1:PEM-CS_DUST_LVEA3_500NM_PCF           Channel Statistics: mean    0.00 max    0.00 std-dev    0.00 (12 hour(s) minute trends)
 
H1:PEM-CS_DUST_LVEA4_300NM_PCF           Channel Statistics: mean    4.53 max   30.00 std-dev    7.15 (12 hour(s) minute trends)
H1:PEM-CS_DUST_LVEA4_500NM_PCF           Channel Statistics: mean    0.00 max    0.00 std-dev    0.00 (12 hour(s) minute trends)
 
H1:PEM-CS_DUST_LVEA5_300NM_PCF           Channel Statistics: mean    4.94 max   20.00 std-dev    6.71 (12 hour(s) minute trends)
H1:PEM-CS_DUST_LVEA5_500NM_PCF           Channel Statistics: mean    0.00 max    0.00 std-dev    0.00 (12 hour(s) minute trends)
 
H1:PEM-CS_DUST_LVEA6_300NM_PCF           Channel Statistics: mean    4.44 max   20.00 std-dev    6.43 (12 hour(s) minute trends)
H1:PEM-CS_DUST_LVEA6_500NM_PCF           Channel Statistics: mean    0.00 max    0.00 std-dev    0.00 (12 hour(s) minute trends)
 
H1:PEM-CS_DUST_LVEA10_300NM_PCF          Channel Statistics: mean    3.43 max   20.00 std-dev    5.70 (12 hour(s) minute trends)
H1:PEM-CS_DUST_LVEA10_500NM_PCF          Channel Statistics: mean    0.00 max    0.00 std-dev    0.00 (12 hour(s) minute trends)
 
H1:PEM-CS_DUST_LVEA30_300NM_PCF          Channel Statistics: mean    4.86 max   20.00 std-dev    6.71 (12 hour(s) minute trends)
H1:PEM-CS_DUST_LVEA30_500NM_PCF          Channel Statistics: mean    0.00 max    0.00 std-dev    0.00 (12 hour(s) minute trends)
 
H1:PEM-CS_DUST_PSL101_300NM_PCF          Channel Statistics: mean    0.61 max    3.00 std-dev    0.84 (12 hour(s) minute trends)
H1:PEM-CS_DUST_PSL101_500NM_PCF          Channel Statistics: mean    0.00 max    0.00 std-dev    0.00 (12 hour(s) minute trends)
 
H1:PEM-CS_DUST_PSL102_300NM_PCF          Channel Statistics: mean    3.97 max   30.00 std-dev    6.88 (12 hour(s) minute trends)
H1:PEM-CS_DUST_PSL102_500NM_PCF          Channel Statistics: mean    0.00 max    0.00 std-dev    0.00 (12 hour(s) minute trends)
 
H1:PEM-EX_DUST_VEA1_300NM_PCF            Channel Statistics: mean    3.89 max   20.00 std-dev    6.09 (12 hour(s) minute trends)
H1:PEM-EX_DUST_VEA1_500NM_PCF            Channel Statistics: mean    0.00 max    0.00 std-dev    0.00 (12 hour(s) minute trends)
 
H1:PEM-EY_DUST_VEA1_300NM_PCF            Channel Statistics: mean    5.03 max   20.00 std-dev    6.45 (12 hour(s) minute trends)
H1:PEM-EY_DUST_VEA1_500NM_PCF            Channel Statistics: mean    0.17 max   10.00 std-dev    1.28 (12 hour(s) minute trends)

RickS, JiianLiu, KentaroModushi, HughR

To enable access to bolt holes in the HAM2 table top for ISI damper installation, earlier this week we removed the improvised strain relief for the ISS PD array cables and moved the ISS PD array.   After completion of the ISI damper installation, we re-positioned the ISS PD array (against stops that had been installed before removing it) and installed the strain relief hardware that had been designed since the first installation of the ISS array for H1 (see D1101059-v5.PDF, sheet 2, zone D3).

Photos with identifying titles are attached below. 

Note that photos of the dust monitor screen showing counts measured just inside the West door opening of HAM2 are included.

All bolts except four were removed from HAM 5 door(s) to prep for Monday morning removal. Turned OFF HAM 5,6 AIP power supplies.

Today we connected the purge air point of use at IMC tube to increase clean air flow, in addition to OMC valve, after receiving reports that clearnoom air flow was overpowering purge air positive pressure. We talked about dialing down fan motors on cleanroom filters. 

WHAM2--Done: All Damping elements installed, TMDs retuned & Installed, all walls replaced--Thank you Sheila & Jeff!

WHAM3--Maybe 85% done, thanks Corey!: Need to install the Corner3 Horz GS13 Can damper on the north side(+X), replace the Corner3 Spring & Flexure access walls.  The TMDs need retuning but the Blade Springs have all been B&K'd.  The TMDs can be installed after the walls are installed.

TITLE: 09/22 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
LOG:

14:51 UTC Karen to LVEA
15:40 UTC Corey to LVEA to move the baffle removed from HAM3
15:44 UTC Gerardo to LVEA to turn on purge air connection at HAM3
15:51 UTC Corey back
16:00 UTC Gerardo back
16:37 UTC Hugh to HAM3 to work on ISI damping with Jim
16:50 UTC Jeff B. to LVEA to survey supplies
17:32 UTC Betsy to LVEA looking for parts
17:48 UTC Dave to CER, WP 7162
18:23 UTC Betsy back
18:34 UTC Untripped HAM4,5 ISI WDs
18:34 UTC Dave back
19:10 UTC Robert to BSC chambers for visual inspection
19:20 UTC Dave powering up ASC
19:38 UTC DAQ restarted
20:00 UTC SUS BS WD tripped. Reset.
20:08 UTC Travis to BSC area to drop off equipment.
20:12 UTC Jeff K., Hugh, Jim to HAM3 for B&K measurments. Jeff K. then to BSC for violin mode measurements.
Peter to PSL enclosure
20:39 UTC Jason to optics lab to retrieve parts
20:45 UTC Robert back
20:52 UTC HAM5 ISI WD tripped. Reset. Tripped again. Left tripped.
21:29 UTC Peter back
21:47 UTC Travis to bier garten to help with violin mode measurements
Delivery from RDL for Gerardo through gate. Kyle received.
22:07 UTC Cheryl to optics lab

Jeff and Jim back, Robert to BSC chambers

23:27 UTC Reset ITMX SUS WD and rerequested ALIGNED. Reset HAM5 ISI WD.

HAM2 (Apollo)
- Work Platforms installed around HAM2

HAM3 (Kissel, Radkins, Warner)
- Finished installing all HAM3 ISI damping mechanisms but Corner 3 Horz. GS13 Can Damper. Corner 1 & 2 walls are back on and torqued
- TMDs still need to be retuned and re-installed
- All three corners' have been B&K hammered

BSC3 / ITMX (Kissel, Sadecki)
- Finished -X/+Y and +X/-Y fiber characterization w/ speaker array this time (and measured up 6th harmonic at 3k)
- Set characterization setup to read out remaining -X/-Y

BSC2 (Schofield)
- Characterized resonances of TCS / Oplev steering mirrors

After Corey and I removed the center of MCA1 (Swiss Cheese), we installed the damping corks on the eye baffle, MCA2 (see figures).

While adding corks, I noticed that the panels on MCA2 did not fit perfectly and bulged out from the frame because the distance between fastening points was longer for the panels than the frames (see figures). This resulted in long stretches of loose sheet metal that vibrated at low frequencies (order of 10 Hz) with large amplitudes and Qs. Hugh had some Class A 1/16” x 2” x 2” Viton pieces associated with ISI table damping that I wedged in between the panels and the frame, giving some damping (see figures). Of course, the best solution would be to increase the size of the holes in the panel so that the fastening would be more forgiving and to use damping washers.

I found a few bulging panels on MCA1 and damped those as well (see figures).

The bulging surface changes the angle and can increase the reflectivity of the panels from the point of view of beam spots (see figures). I checked that the damping pieces wedged between the panel and the frame did not increase the bulges to the degree that it was evident as increased glints in photos from the point of view of beam spots (see figures).

This damping scheme should, of course, be reviewed and, if accepted, we should plan on doing this on all 8 similar baffles at both sites. The only other issue I can think of is melting of the small exposed region from wildly errant beams. However, I think that only rapidly moving wide-angle beams from HAM2 could reach the Viton, and I think we have other Viton on the tables that is more likely to be a problem.

Finally, the central panel of MCA2 was loose where a bolt had apparently broken off during installation, and we added a small chunk of Viton to damp the vibration (see figures).

Robert, Corey, Hugh, Jim

WP7162 Squeezer Install, ASC H/W and S/W changes

Daniel, Dave:

The 8th ADC and the 2nd DAC cards were removed from h1asc0's IO Chassis. Serial numbers are shown in the table below.

The CDS system was configured to no longer run the models h1sushtts and h1susauxasc0 on h1asc0, and to remove it from the DAQ.

The h1asc and h1ascimc models were modified to use the 1st DAC instead of the no-longer-present 2nd DAC. The details of this can be found in the DCC document:

https://dcc.ligo.org/LIGO-T1100472 page 9.

Because of the slight-but-not-zero chance that powering h1asc0 back on could Dolphin glitch the corner station SUS and SEI, we coordinated with Team-Vent for the optimum time to power h1asc0 back on. Jeff K gave permission for the power up and DAQ restart during the lunch hour. Consequently I powered up h1asc0 with no problems. Before restarting the DAQ I took the opportunity to modify h1pemcs to add filter modules in the input legs of the MAG_EBAY_LSCRACK Quadrature Sum circuit so Robert can perform AC coupling tests on the quad-sum signal. The DAQ restart went well. When I noticed that the EDCU was still RED, I found that h1ecatx1 had frozen at 06:30 this morning (Patrick restarted it).

Occurred at ~6:31 AM PDT. Error in attached screenshot. FRS tickets already exist for the same error at both end X and end Y. Restarted.

   The new gloves and dispensers have been setup for the various cleanrooms in the LVEA. The LVEA garbing room (entry to LVEA) has been mostly reorganized. There is still a little to do; please patient while the remodeling is underway. 

   The new gloves will roll out to the reset of the labs around the site and to both end stations over the next few weeks. 

   Your comments and suggestions are always greatly appreciated.       

Corey and I removed the center of the Swiss Cheese baffle today. We also got the corks in the eye baffle but we found a problem and did some extra damping that I will report on later.

See attached screenshot.  Things I noted were:

• There is a glitch in both the EX and EY pump pressure on August 22 which likely corresponds to a HEPI trip described in alog 38313. 
• There is a large spike starting around August 12 that trends back to ~nominal which is likely due to HEPI being locked (aLog 38618).  The signal flatlines thereafter. Was the CS pump station turned off after all HEPIs were locked??  I failed to locate an aLog if this is the case.
• There is another glitch in both the EX and EY pump pressures Sept. 17, which is likely due to Hugh restarting the HEPI pump (?, no aLog yet although it was discussed in the morning meeting) after the Sept. 16 power outage (aLog 38675).