Stefan and Kiwamu

We continued working on the alignment of IMC today. We managed to get the alignment back i.e. the beam hits the center of the IM4_TRANS QPD with all WFSs in action. It is now happiy locking.

However, we found that the IM1 trans path, which is used for a camera and trigger PD, seemed clipped. By moving the mirrors on IOT2L, we concluded that the clipping happened in chamber, namely in HAM2. This is not a critical issue as this light is used only for triggering purpose and it still gives a reasonable amount of the light. We will keep studying what is happening in the chamber. Perhaps this could be due to the uncontrolled degrees of freedom in the IMC alignment control.

What we did:

• We tried to bring the alignment back to a good-in-air-alignment which was established 18 th of November (see alog)
  • We tweaked both HEPIs and MC SUSs.
  • This didn't give a signal on MC2_TRANS, indicating that the cavity axis is quite off from the MC2_TRAN didoe.
• We tried to bring the alignment back to a good-in-vac-alignment which exhibited a nice long streach around 15 th of September.
  • This didn't give a signal on MC2_TRANS either, indicating that the cavity axis is quite off from the MC2_TRAN diode.
• We brought the alignment back to that of yesterday by typing in the numbers from the previous alog (see alog)
  • Note that the HEPI offsets were kept the same as that of September 15 th.
  • This gave a power build up of about 2 counts on MC2_TRANS. This is still way too low.
• The setting of the whitening filters for the MC2_TRANS QPD signals were found to be wrong.
  • In particular, the gain was too low. It was found to be 0 dB while it used to be 36 dB.
  • We found the same issue on the IM4 TRANS QPD and set it back to how they were.
  • MC2_TRANS became approximately 200 counts when it was resonance.
• Because the beam hit the MC2_TRANS, we became confident that the alignment was getting better.
• We moved on the WFS loops.
  • We flipped the demodulation phases by 90 deg to compensate the mysterious RF phase rotation.
  • All of them worked OK.
  • The loops recovered the spot position on MC2_TRANS and now it is centered well.
  • We ran mcwfsreleive to offload the control signals to the suspensions sides
• We realigned the optics on the IOT2L table.
• Then we found that the IM1 trans beam was clipped.

Sysadmin tasks: Patched internal machines accessible from outside of CDS. Performed nmap network scans on 10.20.0.0/24 and 10.101.0.0/24 subnets. Updated network drawings

h1asc0: Replaced the h1asctt model with the new h1sushtts model.

updated the H1EDCU_DAQ.ini file to trend status of all models. Updated autoBurt.req for DAQ frame writers to archive all EPICS channels associated with these systems.

Updated overvew MEDMs (for ASC TT change)

Multiple DAQ restarts were required to support these changes.

- FM-200 Systems (OSB and LSB), annual inspection took place today.
- Apollo at Y-End, working on extraction of cartridge out of BSC06.
- Baling crew @ Y-arm, baling tumbleweeds, now at X-Arm, opening a path.
- Kiwamu and Stefan, working on IMC recovery.
- Dave, some DAQ reboots.
- Thomas, to LVEA, connected TCS ring heater for ITMY.

Kyle, Gerardo 

Repair of the drying towers is done but the purge-air supply isn't available to the LVEA yet -> We still need to devise a method to demonstrate the effectiveness of the removal of the alumina dust before routing the dry air through the final filtration stages and on to the LVEA

HEPI common parts were updated yesterday per WP #4315

HEPI-HAM2 and HEPI-HAM3 were turned ON using the new Command scrips (Command2 Button from the overview screen).

They are running on their respective position loops, with the generic position blend filters (L4C=0, IPS=1).

Both HEPIs are aligned to the initial alignment position (aLog 7180)

HAM2 alignment TARGET (nm or nrad):

HAM3 alignment TARGET (nm or nrad):

I worked on putting together a Contamination Control cart (CCC) as Calum requested while he was visiting. It is at Y End. The cart contains most of the components for a clean Top Gun Ionizer set-up (Top Gun, regulator, wrench, and hoses but no N2), a Tiger Vac with hose and attachments, a power strip, Alpha 10 wipes, a flashlight array with extra batteries, and Class B glass bottles for IPA. The cart and contents are covered in C-3. Please see pix below. Feel free to use the cart for Clean as You Go activities and then let me know how the cart can be improved. 

J. Kissel, D. Barker

There was a significant amount of extra work installing the new HAUX and HTTS models on their respective front ends, so I detail below.

${userapps}/sus/${ifo}/models/${ifo}sushtts.mdl
------------------------------------
- Make sure to remove ${ifo}asctt and replace with ${ifo}sushtts (or capitalized version, when appropriate) in the following files:
    - /diskless/root/etc/rtsystab (on boot machine, i.e. ${ifo}boot0)
    - ${userapps}/release/cds/${ifo}/daqfiles/${ifo}dc0/master
      (which hopefully is the source of the softlink in /opt/rtcds/${site}/${ifo}/target/${ifo}dc0/)
        - the framebuilder's .ini file, 
        - the test point manager's .par file, and 
        - the EPICs database's EDCU .ini file
    - ${userapps}/release/cds/${ifo}/daqfiles/${IFO}EDCU_DAQ.ini
- Log onto ${ifo}build front-end
    - make ${ifo}sushtts
    - make install-${ifo}sushtts
- Log onto ${ifo}asc0 front-end
    - kill${ifo}asctt   (Needs to be removed from front-end kernel, since it'll no longer be used)
    - start${ifo}sushtts


${userapps}/sus/${ifo}/models/${ifo}susim.mdl   (much more simple, more typical since the model already exists)
------------------------------------
- Log onto ${ifo}build
    - make ${ifo}susim
    - make install-h1susim
- Log onto ${ifo}sushh2b
    - start${ifo}susim

Since there are a ton of new channels, one will need to restart the data-concentrator,
- telnet h1dc0 8087
> shutdown

And for good measure (because it seemed to be running slowly), we restarted the EPICs gateway, but this isn't necessary.


Stay tuned -- a plethora of MEDM screen modifications are next!

Stefan and Kiwamu

This is an alog which I was going to post yesterday but hesitated to post as Stefan already posted his one (see alog 8791).

We are still in the process of recovering the IMC locking. The alignment got back to an OK state where we can try locking the IMC, but currently it is prevented by the corner Twincat as it is unable to control the common mode board for some reason.

Here is what we did today:

• The Apollo people moved the IOT2L table in place.
• Filiberto, Stefan and I re-installed the exterior cables.
• We installed two light pipes between the HAM2 chamber and table enclosure.
• LVEA was transitioned to laser hazard to allow for a beam going to the IMC and IOT2L table.
  • The beam was actually already hitting the length PD and wavefront sensors.
  • However the beam was off from the center of most of the optics on the table.
• We did a fine tuning of the table location by physically move the entire table by approximately 3/4".
  • In this way, we centered the IMC REFL beam on the top periscope mirror on IOT2L.
• We tweaked the PSL PZT to get a decent interference in the REFL beam.
  • The misalignment seemed mostly in pitch.
• We realigned the optics in the IMC-REFL path on IOT2L.
  • The beam is now well-centered on every optic and every PD.
• We looked at the PDH signal and found that the I-Q angle had rotated again.
  • Right now it seems that the I-output is optimized while the Q-output had been used for locking.
  • So, obviously the modulation phase rotated by 90 deg again.
  • The signal amplitude also look too small. It is about 80 mVp-p at the I-output while it used to be 1.2-ish V.
• We switched the cables so that the I-output goes to the input of the common mode board.
• Then we found that the Beckoff is not running properly.

The attached is the initial alignment of the day where we could get a decent flash.

ITMX: Approximately 80% installed, still need to run cables and plug in electronics as well as connect the enclosures to the viewports, this requires a work permit so I'll wait till later today to get one signed.

Beamsplitter: Data has been taken to calibrate the optlev signals using the M1 and M2 stage OSEMS, will analyze later today and append a graph to compare to other methods of calibrating.

J. Kissel, D. Barker

After consulting with Dave this morning, and him snooping around a bit, it turns out the compilation failure of the h1sushtts.mdl (see LHO aLOG 8777) was just a stupid mistake of an extra carriage return under the OM3 block. Sheesh. 

The new HTTS front-end model,
${userapps}/release/sus/h1/models/h1sushtts.mdl
now compiles just fine. In addition I've moved on to and finished the same upgrade to the HAUX front-end model,
${userapps}/release/sus/h1/models/h1susim.mdl

I'll reinstall, restart, and restore tomorrow during maintenance and then begin the process of updating the MEDM screens with the hopes to be done by the end of the day. That will FINALLY close out the modifications to ALL SUS from ECR E1300578.

It appeared this morning that the IOC for the dust monitor at end X had stopped. When I telneted into the procServ process on h0epics, it seemed to automatically start running again with no other action on my part, which is strange. It still required renabling the dust monitor and burtrestoring it however.

Corey going to end X to get items for end Y work
Cleaning at end Y
Thomas V. turning on LVEA optical levers

08:43 Justin checking the state of the LVEA South Bay in preparation for later isolated laser hazard work
10:13 Kiwamu and Stefan installing light pipes between HAM2 and IOT2L
12:51 Aaron swapping ISC HAMA coil drivers in CER
13:03 Keita, Corey and Jim going into the end Y chamber to disconnect cables and secure the TMS in preparation for the cartridge removal
13:25 Justin transitioning the LVEA to laser HAZARD

WP signed: 4312, 4313, 4314, 4315

Kiwamu, Stefan,

After cabling up IOT2L, we verified that we see fringes on the IMC, and then realigned the whole IMC REFL path on IOT2L. To hit the top periscope mirror in the center we decided to move the whole table by ~3/4 in to the left (+x) - this should also have centered the transmitted beam periscope.

We have not done a full transmitted beam alignment, but we did quickly center the transmitted fringes on the camera.

We are now getting 930 counts on H1:IMC-REFL_DC_OUTMON - this compares to about 3500cts when we were sending in 1W, consistent with the ~300mWatt being sent from the PSL now.

We again noticed a IMC RF phase flip by 90deg (the 5th time or so - I now stopped counting). So we moved the error signal from Q to I.

The PDH error signal right now is still very small, but we haven't done a full IMC alignment.

Right now the corner Beckhoff seems to be down, and we cannot control the IMC board.

We did everything we needed to allow people to move the ISI out except to cover the entire TMSY with a quad sock. We couldn't find one. Something for tomorrow.

TMS EQ stop thing from BSC6 was moved to BSC10 (it's sitting on the floor in the chamber).

Two cleanings of the Test Stand/Work Space cleanrooms have been completed. The garbing-staging cleanroom was returned to the top of the E-module form the north side of the beamtube and re-cleaned. 

I located D1200329-v4-002 in the LVEA near the West Bay Pallet racks. (BTW: This item shows no evidence of being turned over to 3IFO LTS custody.) The Apollo crew helped me move it to the High Bay roll-up door so that it can be retrieved for shipment. Terry S. is aware of this item and will get it shipped to LLO ASAP (weight ~35 lbs).