Attached are plots of dust counts requested from 4 PM September 23 to 4 PM September 24.
Attached are plots of dust counts requested from 4 PM September 22 to 4 PM September 23.
(Alexa, Daniel)
We checked the vacuum feedthrough flanges on HAM 1 and noticed that none of the double 5-way coax flanges were installed. The missing positions are D1-3, D4-2, D5-2, D6-2 and D6-3 (see D1002872). We are also missing a double D-sub feedthrough flange on position D1-3. With some help we were able to locate the missing flanges and they are awaiting installation.
We noticed that purge air port is located on D5-3 rather than D4-3 as the drawing would indicate. The easiest way to accommodate this difference is to simply route the TT signals through D4-3. It is already equipped with a double D-sub feedthrough flange.
We were able to find some of the in-air cables. The beam diverter cables were routed to the wrong side of the chamber. They were too short to reach the designated flange, so we had to reroute them. We are missing the cables for the LSC PD DC signals and still have to install the coax cables. We have cables for the picomotors, but will do a test first.
There is no SUS satellite amp in the ISC-R4 rack. All units are at LLO and are being shipped.
The picomotor cable has been tested and hooked up. We also installed the one that goes to ISCT1.
The beam diverter cables were tested and installed on D1-1 and not at D2-1 as shown in the drawing. D2-1 is inaccessible.
Ran an svn up on userapps/trunk/isi/common. Details of the svn up are attached.
Leaving YBM turbo and HAM3 RGA valved-in and scanning overnight
All field cabling being removed from ETMX in preparation for cartridge insertion Hugo restarting/testing modified ITMY ISI model I updated the alarm level on dust monitor 8 to reflect that it may no longer be in a clean room 15:53 Jeff and Andres looking for parts near the LVEA test stand Dust alarms in the H1 PSL diode room, checked once, saw no activity
Particular driver filling dewar using both "bottom fill" and "top fill" plumbing
This is a list of the ISC diagnostic optics in HAM1. Some of these are yet to be installed, but all will be installed in this installation window.
The only differences between this and D1000313 are:
| ID | Type and DCC | S/N or marking | Mount | Path etc. | comments |
| M1 | 50% IR, E1000671-02 | ? | RH | REFL air-vac splitter | put in previously |
| M2 | HR IR, E1100048 | 0990 | LH with dump | REFL vac steering | newly put in |
| RM1 | Curved +1.7m HR IR, E1100056-01 | 2 | TT (S/N ???) | REFL vac MM TT1 | newly put in |
| RM2 | Curved -0.6m HR IR, E1100056-03 | 24 | TT (S/N ???) | REFL vac MM TT2 | newly put in |
| M5 | Curved +1.7m HR IR, E1100056-01 | 3 | RH with dump | REFL vac MM fixed | newly put in, different from D1000313 |
| M6 | 50% IR, E040512-B1 (as opposed to E1000671-02) | IO824-01 on the barrel | LH with pico | REFL vac LS/AS splitter | newly put in, different from D1000313 |
| M7 | HR IR, E1100048 | ? | LH | REFL air steering | put in previously |
| M8 | HR IR/GRN, E1000425 | ? | Peri wth dump | POP/ALS peri | put in previously |
| M9 | HR IR/GRN, E1000425 | ? | Peri with dump | POP/ALS peri | put in previously |
| M10 | HR IR, HT GRN, E1000669 | ? | LH | POP/ALS dichroic | put in previously |
| M11 | HR GRN, E1000652 | ? | LH with dump | ALS steering | put in previously |
| M12 | 90% IR, E040512-B3 | IO820-09 on the barrel | LH | POP vac/air splitter | newly put in |
| M13 | HR IR, E1100048 | ? | RH with dump | PSL reference | put in previously |
| M14 | 90% S-pol IR, E040512-B4 | IO823-?? on the barrel | RH | REFL splitter for high power dump | newly put in, different from D1000313 |
| M15 | HR IR, E1100048 | 0944 | RH pico with dump | POP vac steering for LSC | newly put in |
| M16 | HR IR, E1100048 | 0965 | RH with dump | POP air steering | newly put in |
| M101 | 1" HR IR, E1000595 | ? | 1" LH with dump | part of REFL WFS sled | newly put in |
| M102 | 1" HR IR, E1000595 | ? | 1" LH with dump | part of REFL WFS sled | newly put in |
| M103 | 1" 50% IR, E1000671-02 | ? | 1" LH pico | part of REFL WFS sled | newly put in |
| M104 | 1" HR IR, E1000595 | ? | 1" LH pico with dump | part of REFL WFS sled | newly put in |
| L101 | 1" f=+334mm, E1000845-03 | ? | 1" lens | part of REFL WFS sled | newly put in |
| L102 | 1" f=-167mm, E1000845-08 | ? | 1" lens | part of REFL WFS sled | newly put in |
| L1 | 1" f=+222mm, E1000845-02 | ? | 1" lens | for LSC REFL | newly put in |
| L2 | f=+334mm, E1000845-10 | ? | 2" lens | for LSC POP | newly put in |
| BDV1 | HR IR, old iLIGO | N/A (no marking) | BDV | for REFL air | newly put in |
| BDV2 | 90% IR, E040512-B3 | IO820-05 on the barrel | BDV | for POP air | newly put in |
| HW1 | 1" IR half wave plate from ALS stock | N/A (no marking) | rotator mount | for REFL | newly put in |
Note:
We rejected one optic (E040512-B3, IO822-07 on the barrel) because there were many (not too many) defects or particulates that we couldn't remove by nitrogen gun, gentle push using a wipe, nor a serious cleaning effort using methanol and a wipe.
It is still OK-ish, but it's not spotless either. I would have used that if nothing else is available. Anyway, that optic is now in "clean, with issues, or from SQZ" optics bin in the optics lab.
RM1 mount serial number: 024
RM2 mount serial number: 022
Karen and Cris did a very thorough cleaning this morning. Bubba, Randy and Scott headed down after lunch. The hard cover and the dome were removed from BSC9. (The dome is sitting on the SEI Storage Container pallet on clean Al blocks.) Walking plates were flown to the Work Platform, to be wiped down prior to installation. The SEI sock was installed.
Installed 3rd ADC and interface card in the ISC IO chassis. Moved cabling between ADC and interface card so back panel plugs are in proper order. Installed another AA chassis in the rack power it up and ran scsi cable to it. Filiberto/Richard
Ops Summary – 9/24/2013 Work at LVEA (drilling holes) – Apollo Work at End X (cabling) – Filiberto Work at LVEA (Packing and transporting baffle parts) – Thomas Vo H1ISI HAM6 restart – Hugo Cleaning work on BSC9 and surrounding areas at End X – Christina/Cris/Karen H1ISI HAM2/3/4 restart – Hugo
Sebastien, Hugo
Ran an svn up on userapps/trunk/isi/common. Details of the svn up are attached.
(Alexa, Kiwamu, Daniel, Paul, Joe)
We started work on HAM1/ISCTI yesterday (please refer to D1000313 for HAM1 layout). In particular:
1) we moved the green path mirror M10 over by 4inch from its pervious location (away from M10, toward the PSL side)
2) we used the IR beam to approximiately align the green path onto the bottom periscope mirror of ISCT1 with this new location for M10
3) we moved the IR mirror M13 to be approximiately 8inch from M11 (on the HAM2 side)
4) we aligned the IR path onto the bottom periscopre mirror of the ISCT1
The green and IR path reach the bottom of the periscope at a suffecient seperation such that they each are centered on their own bottom periscope mirrors. We have also begun alignment of the IR path onto the SHG on ISCT1.
Here is a link with pictures.
Daniel S. moved the dust monitor at location 9 and turned it on. For some reason this glitched the communications and I had to restart the IOC.
Done.
The only remaining thing is that the telescope mirrors are not protected for the moment.
I kind of remember that we used to use a sock to protect the entire TMS structure during the cartridge move at EY, and if we can do the same that should be fine.
1/4 - turn cw -> attempt to bring dewar head pressures closer to nominal value of <10psi (value) <15psi
[Alexa and Kiwamu]
As a preparation for the upcoming HAM1 installation work, we applied some modifications on ISCT1. ISCT1 is now ready for the HAM1 in-vacuum work.
Replacement of a top periscope mirror with a dual-wavelength mirror
We replaced the upper mirror of the middle periscope by a 2" dual-wavelength mirror so that it reflects both 1064 and 532 nm at once. Note that we had three periscopes on ISCT1 (see D1201103-v13 for the diagram) and the one we modified today is the middle one which used to reflect only green light. The mirror we newly put is E1000425-v3 which we took out of the LSB clean room.
Installation of an infrared bottom periscope mirror
We installed a 2" infrared high reflector. This will take care of the PSL doubling infrared light directed by the upper mirror of the middle periscope. Unlike the usual bottom periscope mirror this one simply stands on the optical table instead of being attached on the periscope structure. We stole one of the 2" infrared mirrors from the rightmost periscope and then mounted it for this bottom mirror. Note that we are not going to use the rightmost periscope mirror any more for steering the PSL doubling light and therefore we removed it (see below).
Removal of the rightmost periscope
We removed the rightmost periscope which had been taking care of the PSL doubling light. The periscope is now put nearby the entrance of the squeezer bay.
Removal of a light pipe
We removed the light pipe which was for the lower right viewport of HAM1 since we are not going to use this port any more. The yellow cover and the lexan guillotine were put back to protect the viewport.
Removal of lexan protection plates (a.k.a. guillotines)
During the removal of the rightmost light pipe, we noticed that the rest of two light pipes somehow still had the lexan guillotine in. This is not great because we know the lexan plate does something bad (see for example alog 6073). We are not sure if they had been there all the time during HIFO-Y. We took them out and put the metal cover on the slot because there is no point to keep them in there.
Yesterday I was asked by Keita to measure the reflectivity of a beam splitter which will be installed in HAM1 next week. This is called M14 in D1000313. I measured it at the OSB optics lab.
According to my measurement :
R = 99.4 +/- 0.1 % for S-polarizing beam at 1064 nm 45 deg.
R = 94.8 +/- 0.9 % for P-polarizing beam at 1064 nm 45 deg.
Some details :
I used the laser which was already setup for the reference cavity and squeezer experiment in the OSB lab. Conveniently there was a PBS already setup after a Faraday on the table and I used it for specifying the polarization of the beam. I put a pick off high reflector in both the transmitted and reflected sides of the PBS so that I don't destroy the existing setup. Then I directed these beams aside and put the BS that I wanted to measure. The incident angle of the beam should be pretty close to 45 deg with an accuracy of 1 deg or so. This was established by comparing the ray trace with the hole locations on the table. Also I put an ND1 attenuator to reduce the power to less than 100 mW so that my power meter can handle.
I measured the power of both reflected and transmitted light of the BS using the Ophir handy power meter. I assumed that loss is very small.
For S -polarization I obtained the following two numbers (also as shown in the attachment ):
R = 42.8 mW / 43.1 mW = 99.3 % and R = 1 - 213.1 uW / 43.1 mW = 99.5 %.
Therefore a plausible reflectivity can be
R = (99.3 % + 99.5%) / 2 = 99.4 %.
The estimated deviation of this mean value is
sqrt( (99.3 % - 99.4%)^2 + (99.5% - 99.4%)^2 ) / sqrt(2) = 0.1 %.
In summary R at S-pol is 99.4 +/- 0.1 %
I applied the same procedure for P-pol and obtained 94.8 +/- 0.9 %. This number is close to the specification which is "95 % P-pol".
I have added this result in DCC as a supplimental document. See E1000871-v1.
