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.
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
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 email@example.com 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!
The anti-symmetric port
spider webs fly in the wind
It looks very promising.
Building: Campus (see attached Map)
Date: Manhole 1 - May 3 through May 5
Manhole 2 – May 6 through May 10
Manhole 2 - May 16 through May 19
Manhole 3 – May 11 through May 19
Time: Noise: 7:00 a.m. To 5:00 p.m.
Access: 24 Hours a day
Interruption: Noise/Vehicular & Pedestrian Access
Storm Drain Manholes
*In order to repair 3 manholes associated with a large storm drain that runs north-south through the campus, work will take place at the
3 manholes shown on the map. This work will interrupt vehicular and pedestrian access on the paths adjacent to the manholes. Though the work at Manholes 1 and 2 will allow vehicular and pedestrian access around the manholes, the work at Manhole 3 will completely block the driveway running south from the southeast corner of Parking Lot 11. Noise will also be created by the repair
3-4 hrs ago we run out of nitrogen. We are back to Vacuum Normal
We have good RGA scan now. There was no scan for 3 months.
Local EQ 3.5 mag at 2:28 UTC May 24, 2016 Rancho Cucamonga, Ca.....no damage
Hello, I am Varun Kelkar. I will be working at the 40m lab as a SURF student this summer with Eric Quintero on Audio processing for real time control system signals. This week I will mostly be working on implementing basic DSP C-code offline. Currently I am trying to write a code for noise whitening.
Varun has received 40m specific basic safety training today.
Please do not place anything on the top of the cabinets that is not tied down. It will end up on our head in an earth quake.
Machined from I-beam 6061 T6 Aluminum 5" x 0.5 x 3.25
As we realized during the EX table switch, the transmitted beam height from the arm is not exactly 4" relative to the endtable, it is more like 4.75" at the X-end (yet to be investigated at the Y-end). As a result, the present configuration involves the steering optics immediately before the Oplev and TransMon QPDs sending the beam downwards at about 5 degrees. Although this isn't an extremely large angle, we would like to have things more level. For this purpose, Steve has ordered some Aluminium I-beams (1/2 " thick) which we can cut to size as we require. The idea is to have the QPD enclosures mounted on these beams and then clamped to the table. One concern was electrical isolation - but Steve thinks Delrin washers between the QPD enclosure and the mount will suffice. We will move ahead with getting these machined once I investigate the situation at the Y end as well.. The I beams should be here sometime next week...
Atm2, version 2 "pdstand" will allow you to clamp from any direction ( Koji was right )
There are some issues with 5 mm sapphire prism Atm5. It will cause interference between one of the prisms and the Side OSEM.
Here are some drawings to see the issues with larger wire standoff.
The 2 mm prism will work.with a 1 mm longer dumbell.
Quotes requested from http://photomachining.com/laser-micromachining-photomachining-contact.html and http://www.optocity.com/
Local EQ 3.1 mag at Jun 2, 2016 11:06:16 PM UTC, Muscoy CA........no damage
Our STS should seen this shake.
Aakash Patil received 40m specific basic safety training.
EQ 5.2 mag at Jun 10, 8:04 am UTC, Borego Spring, CA ~150 mi away.........no obvoius damage, damping restored, MC is locking, arms are flashing
The PMC transmission slow degration or it's input beam is not stable.
ETMX has been jumping around again lately. Just now, I zeroed the ETMX alignment offsets in the SUS model, and centered the ETMX oplev spot via slow machine sliders. OSEM damping is on, oplev damping is off. Let's see how it moves around in the next day or so.
UTC: Jun 10 2016 23:18:26
The drill room floor will be retiled Thursday, June 16. Temporary nitrogen line set up will allow emptying the hole area.
Ifo room entry will be through control room.
Visual inspection of rooftop GPS antennae:
The 2 GPS antennas are located on the north west corner of CES roof. Their condition looks well weathered. I'd be surprised if they work.
The BNC connector of the 1553 head is inside of the conduit so it is more likely to have a better connection than the other one.
I have not had a chance to look into the "GPS Time Server" unit.
PSL, BS, ITMY and ETMX the illuminators were left on over night.
(on tower )
buy Ni coated ones for future use from www.electroenergy.com
Ok for larger RUBY,
unit is not in perfect condtition but usefull
Pick up FC from Gary with purchasing date 7-7-2015
NOT finished, last edited 7-7
Good job Johannes and Subham.
No suspention lost damping.
I called https://www.endruntechnologies.com/pdf/USM3014-0000-000.pdf and they said it's very likely just needs a software update. They will email Jamie the details.
The GPS receiver (EndRun Technologies box in 1Y5? (rack closest to door)) seems to not coming back up properly after the reboot. The front pannel says that it's "LKD", but the "sync" LED is flashing instead of solid, and the time of year displayed on the front panel is showing day 6. The fb1 symmetricom driver and VME timing module are still both seeing day 299, though. So something may definitely be screwy with the GPS receiver.
I wiped down the cranes with wet towel and Mario our janitor did the chamber tops with the tubes.
The optical tabels were not touched.
The outside temp peaked at 44 C yesterday