Zero count and flow test all dust monitors on site except in the PSL. Adjusted the flow on DM #5. All others were OK.
Added 50ml water to Crystal chiller. Diode Chiller water level is OK. Crystal chiller filter is yellow and will be changed when the PSL changes are complete. Diode chiller filter is fine.
This morning, Travis and I checked the ETMY suspension health and then made the pitch adjustments needed to compensate for the addition of the AMD devices to the front of the mass last week. Like what was reported at LLO, roughly 200 uRad (up) of realignment was needed to recenter on the optical lever. A few rounds of TFs showed that the suspension was still free of mechanical interferences, and OSEM speed dials looked good.
We then locked the test mass, swung the ACB back, attached the First Contact spray cone, and sprayed an application of the solution to the ETMY HR. Per procedure, we removed the cone and reinforced the edge of the applied sheet with brush-on First Contact. It now dries until tomorrow morning. So, no oplev or pcal beams will be of use over night.
VE intends to work on the IP port near this chamber this afternoon.
J. Kissel, C. Vorvick Cheryl and I grabbed base-line, top-to-top mass, health-check, transfer functions on all HAM5 suspensions (SR3, SRM, OFI, and ZM2) in prep to the corner-station vent this week, in which we'll install a picomotor on the OFI's SQZ path (ECR E1800070), and wider apeture eddy-current-damping brackets on ZM2 (D1800094). Delightfully, all suspensions show no problems what-so-ever, and results are comparable across similar instantiations of the given suspension type and across observatories. What a breath of fully functional fresh air (here's lookin at *you* HAM6 SQZ SUS...)! Attached are all of the results. A double thanks to Cheryl for helping out! The templates for the data plotted in this aLOG have been committed to the repo here: /ligo/svncommon/SusSVN/sus/trunk/HLTS/H1/SR3/SAGM1/Data/ 2018-04-02_1703_H1SUSSR3_M1_WhiteNoise_L_0p01to50Hz.xml 2018-04-02_1703_H1SUSSR3_M1_WhiteNoise_P_0p01to50Hz.xml 2018-04-02_1703_H1SUSSR3_M1_WhiteNoise_R_0p01to50Hz.xml 2018-04-02_1703_H1SUSSR3_M1_WhiteNoise_T_0p01to50Hz.xml 2018-04-02_1703_H1SUSSR3_M1_WhiteNoise_V_0p01to50Hz.xml 2018-04-02_1703_H1SUSSR3_M1_WhiteNoise_Y_0p01to50Hz.xml /ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/SRM/SAGM1/Data/ 2018-04-02_1636_H1SUSSRM_M1_WhiteNoise_L_0p01to50Hz.xml 2018-04-02_1636_H1SUSSRM_M1_WhiteNoise_P_0p01to50Hz.xml 2018-04-02_1636_H1SUSSRM_M1_WhiteNoise_R_0p01to50Hz.xml 2018-04-02_1636_H1SUSSRM_M1_WhiteNoise_T_0p01to50Hz.xml 2018-04-02_1636_H1SUSSRM_M1_WhiteNoise_V_0p01to50Hz.xml 2018-04-02_1636_H1SUSSRM_M1_WhiteNoise_Y_0p01to50Hz.xml /ligo/svncommon/SusSVN/sus/trunk/OFIS/H1/OFI/SAGM1/Data/ 2018-04-02_1642_H1SUSOFI_M1_WhiteNoise_L_0p01to50Hz.xml 2018-04-02_1642_H1SUSOFI_M1_WhiteNoise_T_0p01to50Hz.xml 2018-04-02_1642_H1SUSOFI_M1_WhiteNoise_Y_0p01to50Hz.xml /ligo/svncommon/SusSVN/sus/trunk/HTTS/H1/ZM2/SAGM1/Data/ 2018-04-02_1641_H1SUSZM2_M1_WhiteNoise_L_0p01to50Hz.xml 2018-04-02_1641_H1SUSZM2_M1_WhiteNoise_P_0p01to50Hz.xml 2018-04-02_1641_H1SUSZM2_M1_WhiteNoise_Y_0p01to50Hz.xml All plotting analysis scripts (especially the plotall*_tfs.m) have been committed with the new measurements added to the list as well.
I wrote up Jeff's instructions for taking SUS transfer functions, and posted them on the main OPS Wiki page. The new page is titled "JeffK's TF instructions" and the link is on the far right, and near the bottom, in the table of wiki page links. The page is newly minted, so please feel free to edit the content at will. The page is divided into two main sections, with the top half of the page focusing on how to take the TFs, and the bottom half of the page focusing on how to load the data into matlab to evaluate the current results compared to the model, and compare the current results with historical measurements.
WP #7440 Removed the last of the house vacuum PVC piping from the LVEA and Mechanical Building. I also removed a 1/2" air line that was used for the old Lighthouse dust monitors. The Lighthouse monitors were shutdown several years ago. This completes the house vacuum removal from End-Y and the Corner Station. Next up, as conditions allow, are End-X and both Mid-Stations.
Platform installed NEG pump commissioning almost done Resume pumpdown of XBM today. YBM tomorrow. Jeff K. running transfer functions on HAM5 SUS in morning no Thursday 1PM meeting Crane inspection postponed New access control installation starting at warehouse Prepping for HAM5 in chamber work (scheduled for Thursday)
Transition LVEA to laser safe.
(1). Closed and locked PSL beam light pipe
(2). Locked both HAM6 tables
(3). Turned off and removed key for both HAM6 lasers
All other checks were OK
70W installation - ongoing
FAMIS 6097 Results attached.
JimW, RickS
After swapping out the Pcal barrel baffle button-head screws, we checked the alignment of the Pcal beams at the Rx module power sensor.
With the ETM aligned within 50 urad of the nominal location (see attached photo), the Pcal spots were where we expected them to be (see attached photo). Good news.
JimW, RickS
Last Friday, we swapped out the 48 electro-polished 1/4"-20 button-head screws screws that attach the "barrel" baffles for screws that had been coated to reduce reflectivity. We also swapped out the washers for coated washers.
Note that the heads of the coated screws are deeply stamped with letters and numbers, while the electro-polished units are smooth.
Chandra R. has been notified that I am here. I expect to be here < 2 hrs. doing various checks of the purge-air supplies at the end stations and the corner station, NEG bake in LVEA, VBO C in VPW and CP4 bake in the Y-mid VEA. I'll make a comment to this entry when I leave.
Turned off YBM MTP controller and GV5 AIP controller. Kobelco oil temp running a little warmer than previous 6 months at 105F. Found flange bolt within Kobelco has worked its way loose and has fallen out. Flange in question is too hot to work on while running but this can be dealt with on a maintenance day. Moved RGA laptop from CP4 at Y-mid to VBOC in VPW (we need to install RGA software on a second laptop at some point). Also, I isolated the scroll pump from Turbo at CP4 and used room air to purge scroll stages of any forming water condensate before restoring to as found configuration. During this visit, I started the last 90 minute activation of the final NEG pump on the OMC tube as part of the particulate mitigation exercise. As such, I'll be able to vent this NEG and do the last UHP N2 blow out anytime tomorrow and be done with this extra step applied to the three vertically oriented NEG pumps. 1955 hrs. local -> Leaving site now.
Today Richard M. tested the new (borrowed) SCR that Kyle installed last night on CP4's regen control circuit. It tested fine and then shorted after about an hour with GN2 flow. I was conservative in driving it while ramping temperature. We are not sure of the exact cause of failure, but are convinced it's an overheating issue. We might install one of the larger HVAC SCRs or buy a 16A variable transformer to control the heater.
Kyle, Chandra, Mark D. Tyler
A new/rebuilt large ion pump was tested at high volts: 114 uA at 7000 V. Monday morning we will vent it with N2 and then install on the new valve on YBM.
Mark and Tyler spent the morning torquing bolts and maneuvering IP equipment.
Starting pumping the XBM today. QDP80 is currently valved out with pressure at 45 Torr. Will resume on Monday. Blow down measured -15degC dew point.
Before pump down I replaced PT-170 full range gauge on BSC7 with a brand new gauge. PT-170 and PT-180 have been acting strange, and after some conversations with manufacturer, we agreed to send at least one unit back for contamination analysis.
1345 hrs. local, Saturday PT170 showing XBM vented. New gauge?
Chandra on site 7:30 pm to 9 pm local
I came on site to check this out. I found that the new IP6 valve flange to beam tube was improperly torqued with a large leak to XBM volume. I also found the gate valve not fully closed (not cammed over).
Reconnected purge air to XBM and slightly opened IP6 gate valve to allow flow path for flushing to dry out the volume. We'll check the blow down dew point on Monday.
Jim, TJ, Cheryl, Patrick 13:50 UTC Peter to PSL 14:50 UTC Mark and Tyler to LVEA (moving HAM6 door) 18:02 UTC Chandra to mid Y 18:02 UTC Travis, Sebastian, Terra, Slawek to end Y 18:14 UTC Karen to mid Y and end Y to drop off supplies 18:38 UTC Betsy to end Y 19:20 UTC Peter to PSL 20:42 UTC Peter and Ed out of PSL 21:08 UTC Tyler done at IP5 21:17 UTC Peter to PSL 22:36 UTC Peter out of PSL 22:56 UTC Tour offsite
Travis painting First Contact around edge of ETMY-HR below.