TITLE: 10/14 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Commissioning
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 2mph Gusts, 0mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.25 μm/s 
QUICK SUMMARY:

• Temp, wind, dust look good
• Microseism is above the 50th percentile but it's trending down
• I'm going to start with an intial alignment

I did some trials for a measurement of the JAC ASC open loop gain tonight. The template I used is saved in userapps/ioo/h1/templates/dtt/JAC_DOF1_P.xml and I copied it over from the template for INP1_P and slowly turned up the excitation.

I still can't get a good measurement and its getting late so I will come back to this tomorrow.

NB: I had some trouble leaving the IMC in offline as ISC_LOCK kept transitioning to PREP_FOR_LOCKING and re-locking it. Also confused myself by selecting a higher number state and so ISC_LOCK went to state 'LOCKING_ALS'.  I finally realised I had to take ISC_LOCK to DOWN, pause this guardian and take the IMC_LOCK guardian to MANUAL. (Thanks Jim for the help.)

Leaving the ISC_LOCK in PREP_FOR_LOCKING as I found it with IMC_LOCK back in managed state.

TITLE: 10/14 Eve Shift: 2330-0300 UTC (1630-2000 PST), all times posted in UTC
STATE of H1: Commissioning
INCOMING OPERATOR: None
SHIFT SUMMARY:

After Elenna finished up for the evening (her notes in alog92301), she left me with some templates to run once I relocked to where she left off. I was able to relock all the way through DRMI_TO_POP automatically and started running the MICH OLG template, but this seemingly caused a lockloss a few seconds later. I relocked back up to the same place and was able to run all four measurements, the results of which are all attached: OLG for MICH, PRCL, and SRCL plus RF DARM. For the MICH and PRCL measurements, I ran them with a reduced excitation amplitude of 200 instead of the 300 I found set in the template. There were several large glitches in the PRG and LSC loops seen at this point, especially during the RF DARM measurement, which I believe explains the poor coherence at a few frequencies (Elenna theorized that "CARM is probably saturating somewhere"). I then moved to PREP_ASC_FOR_FULL_IFO with the intention of updating the green alignment references again, but there was a lockloss before I was able to. I didn't notice anything ringing up leading to the lockloss.

On the next three relocks, I was able to get through PREP_ASC_FOR_FULL_IFO fully automatically, but there were locklosses within two minutes after. I was not able to update green references at any of those times, but because the green alignment references were still updated today, morning operator: please run an initial alignment.

Leaving the IFO in DOWN for the evening following the latest lockloss from PREP_ASC.

(Also, the "gentle coo" in the control room is happening roughly every 14 minutes, iykyk.)

Miriam, Camilla, Sophie

Update on progress on the table in the LVEA:

• We have check the alignment with visible and QCL lasers through alignment appertures and with small adjustments they appear coaligned.
• Removed QPD lens which was put in beam path for practise with the QCL and thermal camera
• Moved 2 sections of laser curtains from HAM1 (check with camilla) to the ITMY CHETA table. We need to get more sections but are waiting for a break in comissioning. 
• Added 2 mirrors just before output to the vacuum tube to reflect the beam back along the table and in the furture down the LVEA to measure QCL beam size at a larger distance.
• Fixed flipper/beckhoff integration issues. IO1 was set to be the readout and IO2 the output. IO2 was changed from activation with button to activated with High/low state change on the thorlabs kinetic software. 
• Added wall padding for all of the walls of the enclosure

note: The 5V, 12V, 15V power supplies mounted on the din rail and there cables have been tested and are now working. Pin1 and pin2 on the cable to the fan had to be switched as the postive and negative were swapped in the cable from the power supply.

Elenna, Sheila, Louis, TJ, Ryan Short

We have reset the alignment references in full lock, and expect that we should be able to set the guardian to ANALOG_CARM and it should work automatically. Our locks are short, 15-20 minutes.

• Elenna updated ISC_LOCK to lower SRCL gain by factor of 0.6 in carm_5_pm (lowers 3f matrix value)
• Elenna updated PRC1 P and Y gains in ISC_DRMI guardian during DRMI ASC engagement to gains of 10 and 4. This loop has been very slow and I have engaged these gains multiple times by hand, so they should be fine
• Asked TJ to lock XARM and we paused there to check the phasing of REFL_{A,B}RF9. Louis placed an injection at 8.125 Hz into LSC-XARM_EXC with an amplitude of 10 counts. We increased the REFL_A phase by about 20 degrees (to 44.97) & increased the REFL_B to 100.78 (from about 94 deg) (sdf attached). We had plenty of room to adjust the REFL_A phase but ran out of range for REFL_B. We think we could do better if we could introduce some more phase on REFL_B. I didn’t get a chance to get screenshots of the REFL_{A,B} power spectrum with the injection.
• Measured TR_CARM at CARM_5PM, we lost lock a few times in the transition to REFL9 or right after getting to resonance.  Changed TR_CARM offset forCARM to REFL from 48 to 52.  We have sometimes been manually stepping this to 54 based on looking at the TR_CARM to TR_REFL transfer function.  
• We stepped through ANALOG_CARM steps, made two changes: 
  • Moved the engagement of the common compensation filter until after the gain was increased.  This filter has a 4kHz zero and at the time the guardian would have engaged it we had a 3kHz ugf.  The guardian steps would later increase the ugf to 10kHz, I’ve moved the filter there in the guardian and followed this procedure by hand. 
  • Commented out the 23 dB gain increase for the IMC(!). 
• Elenna walked alignment while we were locked based on ASC error signals, and set green references, SDF attached. 
• Fellows are damping violins.
• Elenna checked POP9 phasing, it looks good, POP 45 needs adjustment (lost lock). 

TITLE: 10/13 Eve Shift: 2330-0300 UTC (1630-2000 PST), all times posted in UTC
STATE of H1: Commissioning
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 9mph Gusts, 6mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.28 μm/s 
QUICK SUMMARY: Commissioners continuing to make progress with locking and closer to engaging full IFO ASC.

TITLE: 10/13 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Commissioning
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY: Maintenance day activities were limited, with EX PCAL measurement, EX HEPI VFD electrical work, and some HAM2/3 blend testing being the main tasks. Initial alignment has been easierthan yesterday with ALSY DOF3 P only causing trouble for the first alignment. I first turned off this filter and let the other dofs converge, then I turned on DOF3 P with a gain of -1.0 rather than the usual -2.5. This seemed to work and it converged less than 5 minutes later. The second initial alignment after that I didn't have to touch anything for ALS. Relocking has been straight forward, only having to touch up SRM P in DRMI since SRCL P is still out of order.
LOG:

We've been finding the JAC ASC gain turned off periodically over the past few days, as noted by a JAC_LOCK Guardian notification. Trending when this is being turned off, I noticed whenever we go through SDF_REVERT, the gain is turned off. This makes sense as we've purposefully accepted this gain as off since we don't want the ASC on while the JAC is unlocked, such as after a model restart or power outage. Since the JAC_LOCK Guardian turns on this gain when the cavity locks, I've unmonitored the JAC-WFS_GAIN in the ASCIMC model (SDF screenshot attached).

S. Dwyer, R. Short

This afternoon we set out to better align the filter cavity. I started by locking the FC in green (just by taking the SQZ_FC Guardian up to 'GR_SUS_LOCKING' and switching the FC Green 'on') and trying to improve the alignment with FC1 and FC2. Ultimately I didn't get much improvement and the green transmission (FC_TRANS_C_LF) was around 8mW with the cavity locked. I then used the seed beam to dither lock the OPO (seed power was still set low at ~0.5mW) and ran a mode scan on the VCO as in alog92044 with the command z step H1:SQZ-FC_VCO_TUNEOFS '+0.01,1200' -s 0.5

The TEM00 mode during this scan was at a VCO offset of around 3.6 and an IR transmission (FC_TRANS_D_LF) of 1.4mW, which possibly saturated the diode. We can clearly see FC2 length following as the frequency was changing, which caused the green transmission to slowly drop (ndscope screenshot of the scan attached). We checked the FC2 L2P gain and found it at 6.4 with just a "1/1000" scalar in the filter bank. It's likely this isn't the completely correct configuration, so in the near future we'd like to run measurements on the suspension to figure out what the exact filters and gain should be for FC2 L2P. Once that happens, the modescan should show no drop in green transmission, which will make aligning the FC in this way easier.

WP 13697

To mitigate the HEPI VFD going down during power glitches, a line/load reactor was installed at EX. HEPI was taken offline and breaker was LOTO. AC power to the VFD controller was routed through the load reactor.

Part Number: KDRAA28H2

Closes FAMIS85493 last checked in alog91864.

The traces are pretty flat, and look as they did in the last check. EX_RMT has some small jumps around 09/15-16 during the EX pumpdown in which there was a small temperature excursion as well on the 16th.The CS_PUMP_CTRL had a small step down on 9/10.

TITLE: 10/13 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Commissioning
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: EARTHQUAKE
    Wind: 6mph Gusts, 4mph 3min avg
    Primary useism: 0.16 μm/s
    Secondary useism: 0.32 μm/s 
QUICK SUMMARY: Maintenance day starting with a shake. Earthquake from the Altlantic rumbling through. No alarms other than a nuc33 disconnect. There are a few foms that aren't connecting to data, looking into this. 

Workstations were rebooted.

TITLE: 10/13 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Commissioning
INCOMING OPERATOR: None
SHIFT SUMMARY: 

Just lost lock from RESONANCE and went to DOWN. ALSY during initial alignment was a pain, but the rest of INITIAL_ALIGNMENT went quickly and relocking up to RESONANCE went quickly and smoothly.

Initial Alignment - ALSY once again struggling
ALSY was really struggling - I had to touch TMSY, ETMY, and ITMY and get flashes up to over 1.4 to even get it to lock. It then would unlock if I tried the normal INITIAL_ALIGNMENT WFS, so I had to engage ETM TMS WFS and then turn on the ITM WFS slowly. The WFS wouldn't converge, so after letting them try for 20 minutes, I spent the next 45 minutes manually adjusting the alignment sliders to try to get the WFS to converge. Progress was painfully slow and I'm not sure how useful it was. Eventually after not being able to imrove the ITM alignment I gave up, turned the WFS off for the ITM, and offloaded the ETM and TMS WFS.

LOG:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

Sheila, Elenna, Louis, TJ, Oli

• Temporarily Increased the IMC gain (undoing the change made in 92206), to see if this helps the IMC not loose lock when the boost engages
• Sheila debugged some logic that wasn’t correct in the SERVO_COMM_OFFSET state, the checking of if the servo converged wasn’t working correctly.  
• PRG after carm offset reduction (first time) is between 31 and 36
• Elenna has green references written down from engaging DHARD, PRG was at least 44, not SDFed because we think we can get to full ifo
• Manual stepping through CARM_OFFSET_REDUCTION and CARM_5PM, successfully let guardian go to resonance, got green references here.
• In check_AS_SHUTTERS edited the logic that checks if the MICH loop is on so it checks both the gain and the input switch now.  (this caused a lockloss because we switched it to input off).  
• We had several locklosses where we got close to resonance or were locked for a few minutes. 
• Once DHARD WFS were closed (TR_CARM offset -40), we spent some time carefully aligning the arms and following with PR2 and PRM.  We reset the green references here, screenshots attached (X arm, Y arm). 
• We slowly stepped to TR_CARM of -48, and again Elenna walked CHARD PR2 PRM, this lead to a drop in REFL power but an increase in PRG measured by LSC POP LF.  We again captured green references here: (Xarm, Yarm). 
• TJ and Oli started an initial alignment with these references, but an earthquake came through.

TITLE: 10/12 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Commissioning
INCOMING OPERATOR: Oli
SHIFT SUMMARY: Locking up to where the commissioners have been having trouble has been very repeatable and straight forward. Initial alignment right now had ALSY DOF 3 P very slowly going unstable. Handing this off to Oli and Elenna, sorry!

• Morning locking notes

LOG:

TITLE: 10/12 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Commissioning
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 8mph Gusts, 4mph 3min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.33 μm/s 
QUICK SUMMARY: Commissioners doing good work 

I have designed a basic 3 part blend for differential length for SPI, now installed on HAM2 X in the supersensor 6 path. This is not meant to be a highly optimized blend filter, I'm still puzzling through how to try to do the modeling for this and I know Sina is working on something that will probably be better. It should be good enough to try turning on and seeing if we can get some improvement in, ferinstance, the IMC. First attached image compares the installed version ("new") to the 250mhz CPS/GS13 blends that we use most of the time for X. 

Second image shows the complementary form of the filter magnitudes and the sum, showing the total for the super sensor is 1 at all the cross-overs. 

This is mostly meant to be a starting point, I expect we will need to do some more development on this.

• found a bit of clipping on ISCT1 popair shutter, moved shutter, 2 inch lens and bs right after lens in -X direction
• Adjusted alignment onto POPAIR B using PRMI flashes at 10W, then MICH bright at 10W we were able to see a small signal to align this diode to. 
• Also checked alignment onto REFLAIR A using MICH bright. 

• Ran OMC scan to check modulation depth, comparing to 89497.  Modulation depth settings are 27dBm for both 9MHz and 45 MHz, as that alog says they should be.  Modulation depths are about the same as in that alog, (9MHz peak over carrier peak is 0.01, 45 MHz peak/carrier peak is 0.018).  However the carrier peak is about half as large as it should be.  AS_C sees 20mW, we have 8.5W at IM4 trans so we expect 18mW entering HAM6 in single bounce, so this seems OK.  
• With MICH dark locked, Elenna worked on centering POP X, while I went back to ISCT1 to check alignment onto the diodes.  I am sure that the beam is reasonably centered on REFLAIR A, POPAIR B, and POPAIR A (did not check REFLAIR B this time).