RF readbacks

Some strange readbacks in ASC-AS_B_RF42_DEMOD_LOMONCHANNLE_3/4 and LSC-REFLAIR_A_RF45_DEMOD_RFMON.

Shift Summary - Day

TITLE: 01/17 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: MAINTENANCE DAY

• CDS maintenance has the system partially non-functional this morning.
• 16:00 LASER Safety training in main conference room
• Regularly scheduled (Monday 9:00AM)Vent Meeting re-scheduled tor 9:30 AM today
• Vern's Retirement Lunch in the MPR

LOG:

All times marked in UTC:

17:23 Bubba and Mark into LVEA for rigging in preparation for scaffold assembly

17:46 Coca-Cola on site

17:55 Bubba and Mark out

16:00 Jeff to cleaning area and LVEA

16:05 Terry out to squeezer bay

16:30 Pest control on site. Chris escorting them into LVEA.

16:40 Jeff out of LVEA

16:45 Chris escorting pest control down the Y arm to out stations

17:00 Terry out for vent meeting

17:05 Chandra out going to EY

17:15 Norco with LN2 going to vessel ending in 77

17:55 Corey out to Optics Lab

18:00 Terry back out to squeezer bay. Nutsinee, as well.

18:03 Jim and Hugh out to EY to work on HEPI pumps

18:10 Resetting BSC watchdogs tripped from recent earthquakes

18:16 Keita out to floor checking cabling on IO2TL; Sheila taking IMC open loop meaurements; Cheryl is addressing cameras

18:17 Mark and Tyler out to HAM2 to assess the newly installed catwalk and address access options

18:20 Jenne out to join Sheila Keita and Cheryl

18:22 TJ out to optics lab

18:22 Marc to CER to investigate AS WFS read-backs WP#7294

18:23 Travis out to Biergarten

18:35 Mark and Travis out

18:41 Pest control is done

18:53 Mark and Tyler to EY

19:07 Corey out of the optics lab

19:19 Jim and Hugh back from EY

19:21 Sheila out

19:39 Jenne out to IO2TL

19:40 Chandra out to LVEA

21:03 Jeff B out to both end stations - mechanical rooms

21:10 Nutsinee out to squeezer bay

21:22 Betsy and Travis out to Mid-X

21:27 Karen out to the optics lab

21:29 TJ bac out to optics lab

21:29 Jenne out to IO2TL

21:40 Betsy and Travis out to EX

22:06 Marc out

22:30 Sheila out to LVEA with Jenne

22:42 Hugh back

22:46 Chris headed back to corner from EX

23:26 Marc to MY

Monthly Dust Monitor Vacuum Pump Check (FAMIS #7521)

   Monthly dust monitor vacuum pump checks: 

   End-Y - Vacuum pump off. Restarted with no problems. Not sure if it went off due to thermal check (room is hot due to running vacuum group compressors) or due to plug being bumped during service work in the area. Will keep an eye on it while the vent work is going on. 

   End-X - Pump OK and temps within spec. Made slight change in bypass air to adjust vacuum pressure. 

   CS - Pump OK and temps are within spec. Made slight change in bypass to adjust vacuum pressure.   

h1hwsex code was not starting

Dave, Nutsinee:

The EPICS IOC for h1hwsex stopped running at 06:53 PST this morning, related to the reboot of cdsfs0. I rebooted this machine and restarted the HWS code. The EDCU reconnected to all channels except for two: H1:TCS-ETMX_HWS_HEARTBEAT and H1:TCS-ETMX_HWS_SOFTWARE_ERROR_CODE.

These channels are not running on ETMX but are running on ETMY, I'm  not sure why the end stations EPICS differ in this way.

While investigating h1hwsex's problems, I noticed that the HWS code on h1hwsey had stopped due to a full /data disk. Its EPICS IOC was running (albeit in a frozen state). I restarted the ETMY code to get it updating again.

 

 

CDS maintenace summary

WP7289 h1fw0 E18 raid, controller card replacement

Dan, Dave:

Dan hot swapped the primary controller card on h1fw0's raid (raid-msr-e18-0-0). The E18 correctly failed over to the secondary card, the swap-out was transparent to the frame writer.

WP7290 decommission h1ngn front end model

Dave:

I removed h1ngn from CDS following my wiki instructions (https://cdswiki.ligo-wa.caltech.edu/wiki/RemovingFrontEndModel).

Adding Ecat C1 PLC4 SDF to DAQ:

Dave:

I added the new PLC4 SDF to H1EDCU_SDF for trending.

Removing LVEA Dust monitors from DAQ

Jeff B, Dave:

LVEA dust monitors 2,3,4,30 were removed from H1EDCU_DUST.ini

Latest Squeezer Beckhoff PLC4 code:

Daniel, Dave:

I have updated ecatc1plc4 DAQ-INI and target request files after Daniel's code upgrade this morning.

DAQ Restart:

DAQ was restarted at 12:05 PST to cover the DAQ part of the above changes.

CDSFS0 (/ligo file system) Patch and Reboot

Carlos, Ryan, Jonathan:

cdsfs0 was rebooted at 06:45PST. The /ligo/apps file system had NFS export issues which were later resolved.

Note: no work on PEM (WP7291) today, we have an outstanding name changing issue.

PSL Weekly Reportm-FAMIS 7473

Laser Status:
SysStat is good
Front End Power is 35.38W (should be around 30 W)
HPO Output Power is 137.1W
Front End Watch is GREEN
HPO Watch is GREEN

PMC:
It has been locked 0 days, 1 hr 18 minutes (should be days/weeks)
Reflected power = 29.59Watts
Transmitted power = 35.87Watts
PowerSum = 65.46Watts.

FSS:
It has been locked for 0 days 0 hr and 32 min (should be days/weeks)
TPD[V] = 1.559V (min 0.9V)

ISS:
The diffracted power is around 2.4% (should be 3-5%)
Last saturation event was 0 days 1 hours and 17 minutes ago (should be days/weeks)

Possible Issues:
PMC reflected power is high

 

HEPI Pump Trends - monthly :FAMIS 4541

PSL Weekly Report - 10 Day Trends FAMIS #6183

Most notable: ever-declining diode power and a trip this past Saturday

H1SUSITMY R0 Noise Investigation Continues -- R0 RT Clearly Shows More Noise in Sensor ASD.

J. Kissel, R. McCarthy, B. Weaver, D. Sigg
FRS Ticket 9683

Furthering the investigation of H1SUSITMY's R0 noise problems revealed by vertical transfer functions at the top mass, I grabbed an amplitude spectral density of all of the top mass OSEMs on the QUAD. Attached are the results. 
The first two, for comparison, are all of the top mass OSEMs. While all other OSEM channels look to be as expected, the R0 RT OSEM shows a dramatically elevated noise floor with many sets of interacting frequency combs. The remainder of the attachments are just various levels of zoom around various parts of the spectrum to show details of the various combs.
Note these spectra were taken with damping loops ON.

Remember, while Fil was snooping around last week, he found that OSEM's LED power return had a short to ground -- but ruled out everything ex-vacuo -- so it's inside the chamber (see LHO aLOG 40099).

These three chunks of evidence (the electronics checks, the transfer functions, and the raw OSEM ASDs) are indicative that we certainly have *a* problem we need to fix in chamber, WHENVENT. I'll be updating the FRS Ticket to reflect this. 
We have agreed that there is no need to rush vent and fix this now -- we have other priorities with the IFO -- but we *may* couple a quick-fix vent with say, the 70W laser install, or before / during the ITM discharge cycling. To be determined.

However, given our past history with oscillating opamps in UK satellite amplifiers, I'm not convinced this short is the *only* problem. So, at a "medium priority" speed, Richard and the CDS crew will temporarily swap out the M0 (LF RT) / R0 (LF RT) sat amp, and/or move cables around to see if the problem goes away or follows the amp or the cable (since the problem is so easily identifiable from the ASD). I'll also grab some ASDs with the damping loops OFF, in order to rule out drive chain problems and confirm it's a sensor only issue.

Stay tuned!

Vent Meeting Minutes

EY Work:

• ion pump removal: DONE
• EY will have a designated NHZ zone curtained off with "at height" restrictions
• EY work will require good coordination due to limited space.
• EY lock and tag outs for green LASERS Current status is LASER SAFE
• End Station: HEPI work ongoing. Work Permits covered

IO: HAM 2 & 3 area

• Scaffold/platform is up. There is some discussion about the ladder access/type. 
• Permanent cameras are being installed as well as temporary.
• HEPI was locked for work and is now currently UNLOCKED.
• Mode cleaner locking: ongoing more measurement and adjustments to be made

Maintenance: DAQ rebooting and other work interfering with commissioning.

Squeezer: still needs cables routed to HAMs 5/6

ITM Camera install and TCS chiller work done; TCS LASER is back ON

Keita wants illuminators on HAM chambers 2 & 3

Jeff B re-configuring dust monitors prior ro any DAQ restart

CDS Computing: Security updates are ongoing

Beckhoff work: ongoing

PSL tripped off

I was working on alignment of the IMC, and the PSL just tripped off. 

I was just hanging out in the control room trying to close the WFS loops, not out in the LVEA. 

Of note, TVo and I were unable a few hours ago to close the ISS first loop.  The ISS would oscillate any time we tried to close the loop. Rick (on site for the Saturday tour) was planning to help us out once the tours are over, so for now I just have the ISS autolocker off.

The laser tripped because the injection locking lost lock.  The laser came back without any problems.  I did notice that the laser power was down somewhat
from what I remember the laser power to be from yesterday.  I adjusted the temperatures of all 4 diode boxes to get more laser power instead of increasing
the diode current.

    ILS3.png suggests that the injection locking lost lock when the input modecleaner was not swinging.  Looking at ILS4.png, it looks like the laser
frequency was oscillating for some time.  My guess is that at some stage the FSS lost lock, which in turned pulled the master laser frequency beyond
the range of the injection locking.  That in turn caused the oscillator to lose lock to the master laser.

SHG I/Q optimization and Open loop gain TF

Sheila, Daniel, Terry, Nutsinee

 

35.5MHz I/Q optimization, 70.78 degree offset

We injected 105Hz excitation to SHG PZT then adjusted the phase offset while watching I/Q on the SR785. 70.78 deg offset gave a factor of 40dB in ratio and that is now the current setting.

 

SHG Open-loop gain TF, unity gain frequency ~ 3kHz

We adjusted the common mode board gain until the UGF is ~3kHz. When the SHG crystal was not heated (25C) this gain was 4dB.

Later we changed the crystal temperature to 35C to get green light out of the SHG. The gain since then has been 20dB.

Then we reduced the power going in to the SHG cavity. Was 400mW, now 100 mW. This didn't change the UGF by much so I didn't touch the gain setting (still 20dB).

Here's a snapshot of the final open-loop gain TF as of Friday evening. Once lowered the input power I was only able to drive the PZT at 50mV stably.

 

 

SHG fast channels/TTFSS/DCPDs

Two problems prevented acquiring the SHG fast channels:

1. The AA was not connected to the ADC
2. The channel assignment in the model was wrong

Now fixed.

We found a loose cable inside TTFSS which prevented the readback of the LO monitor. We then tested the remote controls for the TTFSS and fixed a problem with the excitation enable logic and the gain slider calibration. The laser crystal temperature was also a factor of 5 too high, since the slow controls signal through the TTFSS implements a voltage divider. We also connected the fast channels. The only thing missing now is the HV.

Most of the DC PDs had the wrong configuration in TwinCAT. Now fixed.

SQZ SHG guardian working

We now have a guardian for the squeezer SHG locking loop which seems to be working fine.  It is located in sqz/h1/guardian In order to run it Dave had to add the sqz guardian directories to the list of places where the guardian machine checks for code.  

It is a very simple guardian, with 3 states, down, lock, and locked.  

It currently uses the transmitted IR power through the SHG to determine if the cavity is locked. Once we have a calibrated green diode (which Terry is working on as I'm writing), we can use that instead. 

There is some basic error checking but much more could be added. 

It locks the cavity by toggling the state of the first boost.  If this doesn't work, it starts a scan of the cavity using the slow output offset, and toggles the boost at each step of the way.  The step size and speed of the scan can be adjusted, but it seems to lock the cavity within about a second with the current settings.  

IMC locked

- Jenne, Keita, Cheryl

• Keita used the PZT scan data to find the real MC2 Trans beam, and center it on the MC2 Trans QPD
• after aligning to flash the IMC, changes in MC1 alignment walked the beam on IOT2L REFL far enough that the table needed to be realigned
• I realigned the REFL path, which had changed enough that after realigning the REFL PD, WFS, and camera paths, I also had to realign the path to the high power beam dumps
• I continued IMC alignment, and used mostly MC3 and MC2, and did need to use MC1 (small changes that maintained REFL beam path)
• Jenne locked the IMC - screenshot attached
• WFS centering has moved away from (0,0), and the beams are now at around (-0.3, 0.6)
• Jenne has the WFS up and running
• centering on MC2 Trans is at (0.2, 0.3) and the SUM is currently over 15, and has been as high as 19, at 5.4W input power to the IMC
• turning the IMC locking off for the weekend, and will resume on Tuesday

Ops Shift Summary

TITLE: 01/12 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
LOG:

15:27 UTC Hugh to HAM2, looking for Mark and Tyler
15:35 UTC Hugh back
15:57 UTC Hugh starting an excitation on end X HEPI
16:11 UTC Christina and Vanessa to end Y
16:43 UTC TJ to optics lab
16:43 UTC Hugh, Mark and Tyler to HAM2 to install scaffolding (WP 7281)
16:47 UTC Christina and Vanessa leaving end Y
16:57 UTC Christina and Vanessa to LVEA to clean
17:19 UTC Filiberto to mezzanine to connect TCS to Beckhoff safety interlock
17:20 UTC Robert to LVEA to look at damaged panel in IOT2L
17:25 UTC Robert back
17:30 UTC Gerardo to LVEA, isolate pump on top of HAM5 and 6
17:43 UTC TJ back
17:56 UTC Hugh to HAM2 to check on scaffolding work
18:01 UTC Chandra to mid Y and end Y
18:04 UTC Fire department through gate, touring site
18:05 UTC Gerardo back
18:10 UTC Mark and Tyler back
18:15 UTC Fire department off site
18:23 UTC Travis and Betsy to end Y
18:25 UTC Cheryl to HAM3, WP 7284
18:46 UTC Mark and Tyler back to HAM2
18:49 UTC Greg starting WP 7285
19:09 UTC Nutsinee and Daniel to squeezer bay
19:34 UTC Gerardo to mid Y to replace VEA camera
19:39 UTC Daniel and Nutsinee back
19:56 UTC Greg and TJ to LVEA to install laser enclosure panels around TCSY table
19:58 UTC Mark and Tyler back
20:07 UTC Gerardo back
20:15 UTC Betsy and Travis back
20:15 UTC TJ back
20:36 UTC Mark to HAM5 to tighten door bolts
20:36 UTC Greg done
20:39 UTC Peter to PSL racks to remove a power supply
20:44 UTC Peter done
20:56 UTC Cheryl to IOT2L to adjust cameras on table
20:56 UTC Filiberto done adding TCS laser to safety system. Going to install power supply that Peter removed in the CER.
21:04 UTC Sheila to LVEA
21:12 UTC Hugh to HAM2 to look at scaffolding
21:18 UTC Hugh back
21:35 UTC Mark done
21:40 UTC Filiberto done in CER. Going back to cabling in LVEA.
21:42 UTC Gerardo to mid Y with camera
21:45 UTC Keita to IOT2L
21:46 UTC Darkhan and Yannick to end Y, PCAL work, transitioning to laser hazard
21:57 UTC Darkhan transitioning end Y to laser hazard
22:02 UTC Gerardo back
22:03 UTC Terry to squeezer bay
22:13 UTC Marc to CER
22:57 UTC Nutsinee to squeezer bay
23:04 UTC Dave restarting h1sqz model
23:05 UTC Darkhan and Yannick back. end Y back to laser safe.
23:08 UTC Nutsinee back
23:29 UTC Sheila and Nutsinee to squeezer bay
23:47 UTC Chandra to mid and end Y

vacuum cell phone alarms reconfigured to make EY/MY more responsive

WP7287

Chandra, Dave:

The Y2 beam tube cold-cathode gauge alarms were sped up from 15 minute to 5 minute reporting. The alarm level was kept at 5.0e-09 torr. The CP4 cold-cathode gauge (PT245) was added to the alarms system with an alarm level of 1.0e-07 (it is operating around 5.8e-08 torr). This work permit was closed.

new h1sqz model installed

Daniel found some more ADC connection issues, which were fixed this afternoon. h1sqz model was restarted, no daq restart was needed.

EY purge air alarm

Measured dew point of EY purge air for about 12 minutes this morning, with no demand (closed off metal valve to get flow through pressure relief valve). DP crept down to -25.3degC. Then found a "switching failure alarm" on at the control panel (visual only - no sound). I reset and re-measured DP. Quickly dropped to -22degC in several seconds. The two drying towers appear to be cycling between regenerating and drying.

Compressors are running between three and four units with current flow. Output pressure is 0.5-0.7 psi. Soft cover was on BSC door, but arm is in chamber.