[Alexa, JoeG, Paul, Kiwamu]

 Today we mainly installed the optics on the west side (which is close to ISCT1) in HAM1 and placed all the optics in the west side except for the in-vac POP PD.

The REFL AIR path is aligned. We didn't align the POP/ALS path because we didn't have green light or bright POP beam at the moment. As for the in-vac REFL detector path we placed only M2. We will install the rest of them on the east side tomorrow.

Below are notes for some particular sections of the west side :

Beam Diverter 1 :

We had to rotate the beam diverter #1 (BVD1) by 180 deg. The beam diverter has a couple of small PEEK materials on the mirror holder and they were initially on the side where the REFL beam hits. So we wanted to avoid this. Since there is no PEEK materials on the other side of the holder we simply rotated the whole structure by 180 deg. Of course we also flipped the mirror itself such that its high reflection surface remains facing to the REFL beam. Note that the rotation of the actual BDV1 is now different from that in the layout drawing (LIGO-D1000313-v10) because of this modification.

REFL path :

Looking at M7, which we had installed before the HIFO started, we noticed that M7 was not at the place that the diagram showed (LIGO-D1000313-v10). It was too far from the west by 2" or so. But I remembered that the position of this mirror was adjusted to catch the REFL beam at its center. So we used this mirror as a reference to recover the good alignment of the IMs and PRM. After Paul untripped IM1-4, enabled the master switch of IM1-4 and set the alignment of PRM back to that in April, we got a decent alignment without a fine tuning.Checking the REFL beam on ISCT1 we confirmed the good alignment as the beam hit the REFL shutter trigger PD.

 We also checked the beam position on the view port on the HAM1/2 septum. It was well-centered. So regarding the REFL beam as a good reference we installed the relevant optics without touching the REFL beam pointing. So for the reason M7, M1, HW1 and M14 are off from the layout (LIGO-D1000313-v10) by about 2 inches or less toward the east. Finally M7 was repositioned because we added two beam splitters which can change the beam trace by non-negligible amount. Currently the REFL beam hits the center of the top periscope mirror on ISCT1. The beam is off somewhat on the bottom periscope mirror because we touched M7 but this is not a big deal because we can steer the top mirror.

M14 (a.k.a. pick off for high power beam dump):

M14, which had been a 50 % BS dedicated for HIFO (see LIGO-D1201390-v2), was replaced by a 90% S-pol BS (LIGO-E040512-B4 and also mentioned in Keita's alog #7844). The removed 50% BS is currently ln the clean booth nearby HAM1 in a bag labeled as "M14".

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.

Started by installing/testing the update on ITMY-ISI (h1isiitmy.mdl)

Ran an svn up on userapps/trunk/isi/common. Details of the svn up are attached.
 

Checker & WD - SEI aLog #257 

Science Frame Channels - SEI aLOG #257

Ported the update to all the H1 BSC-ISIs

Upates were completed on BSC-ISI and work as expected. -  the GND_STS blocks had to be renamed (localy for now)

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:

1. M14, the first BS for the REFL, is a 90% S-pol splitter (E040512-B4), not a 95% P-pol (E1000871-V1-02) as in D1000313, as the reflectivity of the latter was measured to be too much for our purpose.
   • However, 90% is a bit too small, and we might want to insert another 50% splitter later.
2. For M6 (50% P-pol splitter), we used iLIGO REO splitter (E040512-B1, marked "IO824-01" on the barrel) instead of newer ATF optic (E1000671-02) because I couldn't find the latter.
3. We put a black glass behind M5, as all high reflectors upstream of M5 are with some kind of beam dump.

Note:

• The optics with ? in the S/N column just means that I don't know them for now.
• REO optics have markings e.g. IO824-01 on the barrel, but they don't seem to be consistent over the coating type. For example we have IO822-08, IO823-07, IO823-01, IO826-08, IO826-05 and IO824-07, and these are all 50% P splitter.
  • These might be the production run number ("IO824") and the serial number ("-01") for the substrates, but not for the coating. If that's the case we cannot automatically look up the coating type from these numbers, but I'm hoping that each of these numbers is at least unique so I can use these as ID.

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
 

Started by installing/testing the update on HAM6-ISI (h1isiham6.mdl)

Ran an svn up on userapps/trunk/isi/common. Details of the svn up are attached.
 

Checker & WD - SEI aLog #257 

Science Frame Channels - SEI aLOG #257

Ported the update to all the H1 HAM-ISIs

Upates were completed on HAM-ISI and work as expected.

(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

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.