I measured the transmission of the fiber at end Y: coming out of fiber 35 uW 1.5uW towards trans PD 19uW in the wrong polarization 8 uW towards beamsplitter It looks like we need to use the polarization adjuster box to fix this. I will put a calibrtion of the PDs into the PLC.
- praxair - bottled water - sprague - reboots to dust monitors - some red alarms - all cleared - work in EX and EY caused some dust - EY IOP State Word went red a few times - PSL env. monitoring went white a few times - no reboots that were run by me - except a reboot of the DAQ around 4PM by VIncent - I discovered that HAM2 and HAM3 had offsets for ISI change yesterday - not me, not Vincent - I put HAM2 and HAM3 optics at their correct slider values and have them damped for alignment check - I have no tests running - lots of work at EY and EX
Alignment in-air of IO up to PRC: - MC1 P 335um 628 counts Y -795um -2131 counts - MC2 P 505um 946 counts Y 250um 670 counts - MC3 P 177um 331 counts Y -894um -2396 counts - IM1 P 2330 counts Y -170 counts - IM2 P -1880 counts Y -300 counts - IM3 P 2850 counts Y 300 counts - IM4 P -2100 counts Y -950 counts - PRM - aligned P -830um -1556 counts Y -50um -134 counts - PRM - parked P -330um -618 counts Y -6100um -16351 counts - PR2 - best guess P 1400um 2625 counts Y 900um 2412 counts
Attached are plots of dust counts requested from 5 PM April 28 to 5 PM April 29. The dust monitor at location 4 in the LVEA keeps stopping due to an unknown loss of power.
[Dave Arnaud]
Following Stuart's update of medm screens at LLO, the previous aLogs, and the recent update of medm macro character limit (from 256 to 2048), Dave and I edited the changes on the SITEMAP for all suspensions* at LHO.
*except for ITMX/ETMX/TMSX/BSTST and HAUX
I started the rework of the IOT2L layout today. Changes were made after LLO had some experience with their table. With the new layout, I found that our REFL PD and the new position for the WFS1 pico motor were incompatible, so I move the WFS1 pico motor toward it's pick-off be 3", and moved WFS1 by 3" to achieve the same path length as on the new layout of 290mm. Pictures of REFL PD, WFS1 and WFS2 attached. Also attached is a list of components and their status for the REFL path - i.e. which components are currently not on the table.
The damping loops for HAM2 and HAM3 ISIs were turned ON, uppon SUS's request.
Both the corner and EY Beckhoff systems were updated to the most recent versions. Apart from some cleanup a number of channel names changed to bring the slow controls system in line with the real-time system:
This will require some changes with medm screens. This version now has a complete set of hardware links with the excpetion of the rotation stages.
The EPICS gateways for the corner PLC1 channels are currently not running due to the lareg numbers of channels.
[Patrick, Keita, Sheila, Kiwamu]
The IOT2L enclosure was rolled close to HAM2. So now IOT2L is at the official permanent place again.
The two light pipes between HAM2 and IOT2L are back on.
Currently the west area of HAM1 and 2, where IOT2L and ISCT1 reside, are isolated by the black curtain-ish laser barriers.
The LSC, ASC and ALS pull down tabs were moved from the right side to the left as they don't necessarily belong to a particular location (i.e. LVEA and EY). The attached is the curent view of SITEMAP.adl.
- Apollo "crew" torqued some doors and viewports, and cleared/checked other items, see entry by Jodi.
- Betsy did a walk around input chambers/LVEA area this morning, final check before pump down.
- Michael and Joe, Viewport final check, LVEA, before pump down.
- Travis to work around HAM2 and HAM3, camera work.
- Kyle started pump down of YBM+BSC01+BSC02+BSC03+Inputtube-HAM01, see his entry.
- Keita, et.al., moved/set IOT2L in place.
- Cheryl to LVEA to work in IOT2L.
- King soft water to visit LSB RO system, charcoal work.
Dew point of "blow down air" < -25C
There were a couple of items from the list to clear up this morning: torquing of bolts at HAM3 and check to see that all ports have some pump-down worthy covering. In addition, Kyle had a couple of items for the Apollo crew to attend to. I added those items to the bottom of the list. 1. Done-Remove Walking Plates from BSC 2 (Place in E-Mod Staging Cleanroom) 2. Done-Replace dome on BSC2 (Check with SEI first: unlock ISI check cables) 3. Done-Place hard cover on BSC2/HAM3 spool openings 4. Done-Install curtains on HAM3 cleanroom 5. Done-Move BSC cleanroom to beamtube by East Bay pipe bridge 6. Done-Dis-assemble Work Platform (Place on floor by ?????) 7. Done-Move HAM3 cleanroom north as far as possible 8. Done-Close gaps in cleanroom to contain BSC2 spool area 9. Done-Move SEI related electronics over center of spool area 10. Done-Insert small spool piece 11. Done-Insert large spool piece 12. Done-Install HAM3 east door 13. Done-Move cleanroom from pipe bridge area to HAM4-plug in-turn on 14. Done-Call for HAM4 cleaning 15. Done-Install HAM2/1 east doors 16. Done-Install HAM 2/3 west doors 17. Done-Install BSC1 viewports 18. Done-Remove HAM4 north door 19. Done-Install blank on septum plate between BSC2 and HAM4 20. Done-Install HAM4 north door 21. Done-Torque all bolts (except HAM1 and HAM4-4 bolts only) 22. Done-Check for holes 23. Done-Remove the "hinged" HAM4 bellows retraction tie-rods per Kyle 24. Done-Remove, inspect and re-flange (using LIGO hardware) the 10" CFF blank that is in the 2 o-clock position on the MC tube-HAM3 adapter and which is labeled as "not leak tested" per Kyle 25. Done-Return HAM4 bellows tie-rods per John ;-) As far as I know, all Apollo tasks are complete in preparation for HIFO pump-down.
Configured HPI pump controller at EY for eventual connection to network. It now appears as "h1hpipumpctrley" instead of "localhost", and it's IP address is set up for connection to the 10.105 VLAN. The EPICS channel names still need to be changed in a similar fashion to the corner station controller. This does allow a slightly modified laptop to be connected to it to view the MEDM screen at the controller, so the resource-hungry desktop manager doesn't have to be run on the controller. Vincent and I left the controller running, with the system pressurized.
BSC2, IY adapter, HAM1, HAM2 and HAM3 have all viewports necessary for the full IFO.
BSC1 is good for HIFO but one viewport for CO2 laser should be installed in the future.
For video and illuminator viewports, no inspection was made except to confirm that something was installed.
For viewports that receive 1064nm and/or 532nm beam, we made a visual inspection to see the color of the surface, and all seemed to have some AR. No attempt was made to tell 1064/532 combo AR from so-called "high quality" optic (iLIGO 1064nm viewports?).
Thomas looked at oplev viewports and confirmed that they are the correct ones.
Following is a list of what is installed and what is not. Viewport numbers are based on https://dcc.ligo.org/T1000746.
BSC1 (IY): Illumination (G3), IY alternative video (G2), IY CP video (G11).
CO2 laser viewport (C0G5) is going to have to be installed in the future, but not this time.
BSC2 (BS): Oplev IN/OUT (G2), Video BS (G8), Illuminator (G9)
IY adapter A-1: Oplev IY OUT (VP1), IY Video (VP2), Oplev IY IN (VP4).
FTIMY-related viewports (VP3, 5B, 6) are not installed as we don't have H2.
HAM1: Video (A2F1) and Illuminator (A2F4) on the east door. IR PSL (A1F5), ALS green (A1F4) and POP/REFL (A1F3) on the west door.
HAM2: Faraday input video (A2F1), General video(A2F2), "IO trans mon & PRC MM mon beam" (A2F3), "IO trans mon & PRC MM mon beam" (A2F4), PRM video (A2F5) on the east door.
General video (A1F2), Illuminator (A1F1), MC1 Video (A1F3), MC REFL (A1F4), SM1 TRANS (A1F5) on the west door.
MC3 video (D7), Faraday output, SM1 and SM2 video (C1) and REFL parking (D8) on top.
It doesn't make sense that both A2F4 (left on the east door) and A2F3 (middle) are specified to use 1064/532nm combo viewport for the same purpose. There are two beams coming through SM2 (IM4) but both of them come out of A2F3.
A2F4 is valuable as a video viewport, so we can proceed with this configuration, but somebody needs to confirm my suspicion that VP800 is good enough for A2F3, and then T1000746 should be updated.
HAM3: PR2 video (A2F3) on the east door. Illuminator (A1F3), MC2 Trans (A1F4) and MC2 Video (A1F5) on the west door.
WAMCA1 attachment by HAM2: PR2 Video (VP3), Oplev HAM3 in/out (VP7, not VP5 as specified by T1000746), Video MC2 (VP9).
WAMCB1 attachment by HAM3: MC3 video (VP3), Oplev HAM2 IN/OUT (VP5), Oplev PR3 IN (VP7), PRM Video (VP9), MC1 Video (VP10), Oplev PR3 out (VP11), PR3 Video (VP12).
Correction:
"It doesn't make sense that both A2F4 (left on the east door) and A2F3 (middle) are specified to use 1064/532nm combo viewport for the same purpose. There are two beams coming through SM2 (IM4) but both of them come out of A2F3.
A2F4 is valuable as a video viewport, so we can proceed with this configuration, but somebody needs to confirm my suspicion that VP800 is good enough for A2F3, and then T1000746 should be updated."
The above should read:
"It doesn't make sense that both A2F4 (middle on the east door) and A2F3 (left) are specified to use 1064/532nm combo viewport for the same purpose. There are two beams coming through SM2 (IM4) but both of them come out of A2F3."
A2F4 is valuable as a video viewport, so we can proceed with this configuration, but somebody needs to confirm my suspicion that VP800 is good enough for A2F4, and then T1000746 should be updated."
Beamsplitter transfer functions have been running over the weekend in order to fix any issues during the day if needed.
The attached pdfs show :
Vertical degree of freedom is noisier than expected between 1.5 and 3Hz (3rd page of each pdf).
Gerardo went into the chamber, checked the EQ stops, and nothing is apparently touching. When the chamber will be free tomorrow during the day, I will run quick DTT measurements for the vertical degree of freedom, between 1 and 3Hz and see if it's still noisy. There were no need of taking the night for full measurements since the other DOFs are fine. I let the night to Vincent for ISI tfs if needed.
I ran a DTT transfer function on the vertical degree of freedom of the beamsplitter this morning
New TF looks nicer than the old one from April 12th, meaning the beamsplitter is healthy and passed Phase 3a testing
Will run a full set of TF tonight, for our record.
Data of the DTT measurement has been saved in a matlab structure named :M1VtoM1V_20130422.mat under SusSVN/sus/trunk/BSFM/H1/BS/SAGM1/Data and has been commited to the svn
Last measurement on the beamsplitter has been taken monday night April 22nd with damping on and off, before pumping down BSC2 chamber.
One thing to notice :
Vertical degree of freedom remains noisy around 2Hz, as on April 12th, even though dtt transfer function from aLOG 6158 doesn't show any issues. It could be that when taking TF with matlab, the drive for that frequency band is not high enough. I will try with higher gains in the MATLAB_TFs.m script and see if it changes anything.
