The noisy fan belt on the roof of the control room was finally replaced on Friday, Jan 22 2016
Air condition maintenance is happening. It should be done by 10am
Objective: measure the noise floor on the optical table and the floor so we can decide if the table needs better anchoring before swapping in
the larger optical table
The accelerometrs labeled as MC1 ( just north east of IOO chamber floor ) and MC2 ( north east leg of MC2 table floor ) were moved:
MC1 to the floor at the north west leg of optical table.
MC2 is in the north east corner of the optical table
Atm2 was taken after table leg bolts were tighed at 40 ft/lb
The spectrum looks similar to ETMY (Guralp for below 3 Hz ) except the Z direction
The spectrum looks similar to ETMY except the Z direction
Conclusion: up to 20 Hz this set up is good.
Rana stated yesterday that there will be a vacuum control update in the close future. Witnesses : Rich, Chris and Dave
Can you give me this in writing?
After adjusting the alignment of the two beams onto the PD, I managed to recover a stronger beatnote of ~ -10dBm. I managed to take some measurements with the PLL locked, and will put up a more detailed post later in the evening. I turned the IMC autolocker off, turned the 11MHz Marconi output off, and closed the PSL shutter for the duration of my work, but have reverted these to their nominal state now. The are a few extra cables running from the PSL table to the area near the IOO rack where I was doing the measurements from, I've left these as is for now in case I need to take some more data later in the evening...I
Innolight 1W 1064nm, sn 1634 was purchased in 9-18-2006 at CIT. It came to the 40m around 2010
It's diodes should be replaced, based on it's age and performance.
RIN and noise eater bad. I will get a quote on this job.
The Innolight Manual frequency noise plot is the same as Lightwave' elog 11956
We got it! Traps are removed.
It rained hard yesterday. We have not had this strong downpoor for years. We got 0.7" and the roof did not leak.
Daily summary pages are blank today. Yesterday is ok
Pasadena fire marshal inspected the lab today. No violation was found.
No sign of damage
what is next?
Atm 3, Ron Drever could not celebrate with us because of health issues.
It shipped out for repair evaluation.
Arrived to Hayward,CA 2016Feb16
Pasadena reported the Sunday night event as a power transient caused by the trip of a power transmission line. This affected the entire city. Once the loss was detected, the system automatically switches to an alternate source. It was about one second for the system to recover.
2W Innolight, both Lightwaves at the ends, PSL HEPA, Ref Cavity and 3 AC units turned on.
The 40m vacuum did not trip. It is vacuum normal.
The Jetstore computer is indicating power failer.
TP3 drypump replaced after 10,344 hrs at 750 mTorr foreline pressure.
The foreline pressure is 13 mTorr after 8 hrs of running, TP3: 50K rpm, 0.14 Amp with all annuloses pumped.
The annulos pressures are 0.3 - 5 mtorr
Frame builder just crashed again
kicks ITMX-UL magnet into stuck position.
Hopefully it is only sticking.
Good job Q! Give us more details please or play Rachmaninoff Piano Concernto #2
Atm2, EQ 3.5 and 4.1
confirming ITMX is really free
Taking inspiration from J. Lewis et. al, ITMX has been freed.
Safety audit went smothly.
Crane inspection is scheduled for March 4
Safety glasses will be measured before April 1
Chiara reports an uptime of >195 days, so its UPS is working fine
FB, megatron, optimus booted via front panel button.
Jetstor RAID array (where the frames live) was beeping, since its UPS failed as well. The beep was silenced by clicking on "View Events/Mute Beeper" at 192.168.113.119 in a browser on a martian computer. I've started a data consistency check via the web interface, as well. According to the log, this was last done in July 2015, and took ~19 hrs.
Frontends powered up; models don't start automatically at boot anymore, so I ran rtcds start all on each of them.
rtcds start all
All frontends except c1ioo had a very wrong datetime, so I ran sudo ntpdate -b -s -u pool.ntp.org on all of them, and restarted the models (just updating the time isn't enough). There is an /etc/ntp.conf in the frontend filesystem that points to nodus, which is set up as an NTP server, but I guess this isn't working.
sudo ntpdate -b -s -u pool.ntp.org
PMC locking was hindered by sticky sliders. I burtrestored the c1psl.snap from Friday, and the PMC locked up fine. (One may be fooled by the unchanged HV mon when moving the offset slider into thinking the HV KEPCO power supplies need to be brought down and up again, but it's just the sliders)
Mode cleaner manually locked and somewhat aligned. Based on my memory of PMC camera/transmission, the pointing changed; the WFS need a round of MC alignment and WFS offset setting, but the current state is fine for operation without all that.
10:15 power glitch today. ETMX Lightwave and air conditions turned back on
The crane inspection is scheduled for this coming Friday from 8-12
Bob cleaned the safety glasses. They were sonicated in warm 2% Liquinox water for 10 minutes. Steve checked them by transmission measurement of 1064 nm at 150 mW
All 3 cranes inspected by professional and load tested with 450 lbs at max reach.
Johannes found dripping water at the vac rack. It is safe. It is not catching anything. Actual precipitation was only 0.62"
It's may be the janitor's doing.
I noticed that the HEPA filers were off. They are turned on at 20%
Ruby wire standoff 1 mm od. with V-groove test cut. SOS sus wire 0.0017" od. is in the background.
Kate Dooley picked up this item today.
The enclosure top piece in the middle is still in the machine shop.
The carpenter who helps in the built just left for one week vacation.
The unit will be ready on April 1
I'd prefer doing the installation with the enclosure on the new table.
It's the only way to minimize the resonances of the enclosure with shimming.
Diagnoses from Glasglow:
“So far we have analyzed the laser. The pump diode is degraded. Next we would replace it with a new diode. We would realign the diode output beam into the laser crystal. We check all the relevant laser parameters over the whole tuning range. Parameters include single direction operation of the ring resonator, single frequency operation, beam profile and others. If one of them is out of spec, then we would take actions accordingly. We would also monitor the output power stability over one night. Then we repackage and ship the laser.”
The 2W Innolight was turned on.
Batteries replaced in control room UPS after 3 years from replaceUPSbattery.com
We have one calibration sheet of GUR- B, from 26 June 2008, model CMG-T40-0008, sn T4157 at ETMY east, interface box input 1
I'm looking for calibration paper of GUR- A, model CMG-T40-0053, sn T4Q17 at ETMX south, interface box input 2
I measured the guralp raw outputs and the TFs using the handheld unit and an FFT analyzer.
The handheld unit was connected to each guralp with the same cable which is confirmed t be functional with the Yend Guralp.
The signal for Z, N, and E directions are obtained from the banana connectors on the handheld unit. Each direction has mass, low gain velocity, and high gain velocity output. The PSDs of the signals were measured with an FFT analyzer. The transfer function from the mass signal to the low/high gain signals were also measured for each direction.
The adjustment screw for the E output of the Xend does not work. I had to tilt the Xend Guralp using the leg screws to bring the E signal to zero.
Attachment 1: Raw voltage PSD for all outputs
Attachment 2: Comparison of the low gain vel outputs
- All of the mass output show similar PSDs.
- Low gain velocity outputs shows somewhat similar levels. I still need to check if the output is really the ground velocity or not.
- High gain velocity outputs are either not high gain, broken, or not implemented.
- We need to calibrate the low gain output using signal injection, huddle test, or something else.
Attachment 3: TFs between each mass output and the low or high gain outputs
- TFs between the mass signal and the low vel signals show the similar transfer functions between the channels.
- The high gain outputs show low or no transfer function with regard to the mass signals.
1W Innolight is NOT getting Noise Eater as it was decided yesterday at the 40m meeting. Corrected 3-25-2016
Repair quote with adding noise eater is in 40m wiki
All Guralp instruments and digitisers are provided with calibration documentation. Should you require a copy of calibration information for any product, email firstname.lastname@example.org with the serial number of the product in the subject field and calibration information will be sent to you through email.
See data in the 40m wiki
Recent EQ 4.8 mag San Felipe, Mexico trips PRM sus damping.
PRM damping restored. PMC locked.
Beam colors: 1064 nm red, 514 nm green and 633 nm yellow.
There should be room for lens in front of the pd at red3 and a mirror for alignment in the new layout.
This picture may help you how to improve the new ETMX 4' x 3' optical layout.
Local earth quake 3.1 magnitude in Valencia, Ca did not trip our suspensions.
Steve has finished installing the enclosure on the new endtable. So Eric and I decided to try and lock the X arm and measure the beam height of the transmitted IR beam relative to the endtable. We initially thought of using POX DC as a the LSC trigger but this did not work as there was no significant change in it when the arm was flashing. Eric then tried misaligning the ITM and using AS110 as a trigger - this worked. We then recompiled the ASS model to take AS110 as an input, and ran the dither alignment. After doing so, I measured the beam height at two points on the new endtable.
So the beam is about 0.7" higher relative to the endtable than we'd like it to be. What do we do about this?
I've also placed two irides extending the cavity axis on the endtable. These should be helpful in aligning the green to the arm eventually.
The new TMC 4' x 3' x4" optical table and enclosure is installed - aligned- leveled.
Atm2, Picture is taken ~42" from the window at 3.75 camera height. The leveled table height is wthin 1/4 at the center of the window.
I think this is close enough to move on with the installation of the optics.
We can raise the loaded table in the future if it is needed.
Atm4, Optical table height to floor 33" at the south west corner
Atm3, Enclosure top cover transmission at 1064 nm, 1mm beam size, power level 157 mW, 0 degree incident angle, T 1.3% Metal shield is required above 100 mW hitting the wall of the enclosure!
Atm5, window to enclosure Kapton seal
X arm resonating after alignment, beam height on ETMX optical table ~4.75"
The laser is back. Test report is in the 40m wiki as New Pump Diode Mephisto 1000
It will go on the PSL table.
The ruby wire standoff V groove cuts are looking good.
I will request free sample of sapphire prizm where one side would have SOS's R cylindrical surface.
The present plan to have the v-groove on this prism.
ETMX optical table is grounded to ETMX chamber through 1 Mohms
The doubling oven temp controller is installed to reach its cable.
The PSL had one 1064 nm beam to be blocked around the north east side. The end enclosures are fine.
It is worth wiping table top covers. Use isopropanol soaked lint free wipes.
Steve pointed out that in the aftermath of the Nitrogen running out a couple of times last week, the RGA had shut itself off thinking that there was a leak and so it was not performing the scheduled scans once a day. So the data files from the scheduled scans were empty in the /opt/rtcds/caltech/c1/scripts/RGA/logs directory. The wiki page for getting it up and running again is up-to-date, but the script RGAset.py did not exist on the c0rga machine, which the RGA is communicating with via serial port. I copied over the script RGAset.py from rossa to c0rga and ran the script on that machine - but the error flags it returned were not all 0 (indicating some error according to the manual) - so I edited the script to send just the initialize command ('IN0') and commented out the other commands, after which I got error flags which were all 0. After this, I ran a manual scan using 'RGAlogger.py', and it appears that the RGA is now able to take scans again - I'm attaching a plot of the scan results. We've saved this scan as a reference to compare against after a few days.
Our last RGA scan is from February 14, 2016 We had a power outage on the 15th
Gautom has not succeded reseting it. The old c0rga computer looks dead. Q may resurrect it, if he can?
Dan sealed the leak today.
Earth quake stops need viton tips.
Wirestandoffs are still aluminum.
Gautom is progressing with the layout nicely. The X-arm transmission window have not seen cleaning for decades. This should be the time to do it. Here is picture of dirtiness.
It is not that simple... How much effort should we put in it? The hole table with 1W inno laser plus... set up now about ~500 lbs We can pull it off carefully, but it is not risk free.
We should look at our other signal port windows! Gautom's long reach able him to do the first contact cleaning without moving anything. It is great!