ELOG 40m

professional crane inspection

safety

The crane inspection is scheduled for this coming Friday from 8-12

12018

Thu Mar 3 10:19:20 2016

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

12020

Fri Mar 4 11:07:10 2016

crane inspection completes 2016 safey audit

safety

All 3 cranes inspected by professional and load tested with 450 lbs at max reach.

12031

Fri Mar 11 16:52:53 2016

Johannes found dripping water at the vac rack. It is safe. It is not catching anything. Actual precipitation was only 0.62"

12035

Tue Mar 15 10:31:58 2016

IOO

Laser is turned back on

It's may be the janitor's doing.

I noticed that the HEPA filers were off. They are turned on at 20%

12036

Wed Mar 16 15:36:03 2016

SUS

wire standoff test cut

Ruby wire standoff 1 mm od. with V-groove test cut. SOS sus wire 0.0017" od. is in the background.

12038

Fri Mar 18 11:04:56 2016

Kate Dooley picked up this item today.

12039

Mon Mar 21 10:07:45 2016

SUS

ETMX enclosure update

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.

12040

Mon Mar 21 14:29:32 2016

1W Innolight laser repair diagnoses

Calibration-Repair

Quote:

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.”

12041

Tue Mar 22 14:12:18 2016

IOO

Laser is turned back on

The 2W Innolight was turned on.

12043

Wed Mar 23 11:55:47 2016

Smart UPS 2200 Battery Replaced

General

Batteries replaced in control room UPS after 3 years from replaceUPSbattery.com

12044

Wed Mar 23 15:23:12 2016

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

Quote:

I measured the guralp raw outputs and the TFs using the handheld unit and an FFT analyzer.

[Setup]

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.

[Result]

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.

12045

Thu Mar 24 07:56:09 2016

NO Noise Eater for 1W Innolight

Calibration-Repair

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

Quote:

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:

12046

Thu Mar 24 08:20:52 2016

Guralp-A calibration sheet

PEM

All Guralp instruments and digitisers are provided with calibration documentation. Should you require a copy of calibration information for any product, email caldoc@guralp.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

12050

Mon Mar 28 08:30:09 2016

Recent EQ 4.8 mag San Felipe, Mexico trips PRM sus damping.

PRM damping restored. PMC locked.

12051

Mon Mar 28 10:43:18 2016

ETMX 4'x2' optical table pictures

12057

Thu Mar 31 09:38:41 2016

Y end 4x3 existing layout

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.

12062

Tue Apr 5 08:55:51 2016

Local earth quake 3.1 magnitude in Valencia, Ca did not trip our suspensions.

12067

Thu Apr 7 14:30:58 2016

Quote:

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.

Bottom line:

The beam is roughly level across the table (along the North-South direction, within the precision to which I could place the irides and measure the height). The table has also been levelled pretty well...
The beam height is ~4.7" across the 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?

Is it even possible to raise the table by 0.7" so we can have a level beam everywhere? Are there some constraints related to how the enclosure is attached to the window?
Are we okay with tolerating a solution where we keep the beam level at 4", and use Y10 and Y11 (see layout in elog 12060) to raise the beam by 0.7", and then have slightly higher posts for the optics downstream of this point?

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

12068

Fri Apr 8 09:13:20 2016

X arm resonating after alignment, beam height on ETMX optical table ~4.75"

12070

Mon Apr 11 17:03:41 2016

1W Innolight repair completed

Calibration-Repair

The laser is back. Test report is in the 40m wiki as New Pump Diode Mephisto 1000

It will go on the PSL table.

12071

Tue Apr 12 09:14:57 2016

Ruby wire - v - groove cut pictures

SUS

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.

12074

Wed Apr 13 11:00:28 2016

X endtable repopulation

ETMX optical table is grounded to ETMX chamber through 1 Mohms

The doubling oven temp controller is installed to reach its cable.

12082

Tue Apr 19 10:58:53 2016

safety scans at PSL & tables

safety

The PSL had one 1064 nm beam to be blocked around the north east side. The end enclosures are fine.

12084

Wed Apr 20 14:36:45 2016

It is worth wiping table top covers. Use isopropanol soaked lint free wipes.

12086

Thu Apr 21 15:12:38 2016

Quote:

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?

12087

Fri Apr 22 13:58:13 2016

Dan sealed the leak today.

12088

Mon Apr 25 11:07:06 2016

Earth quake stops need viton tips.

Wirestandoffs are still aluminum.

12089

Tue Apr 26 15:22:35 2016

Cleaning ETMX vacuum dirty window

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!

12091

Wed Apr 27 09:05:10 2016

Sad situation

The anti-symmetric port

spider webs fly in the wind

12094

Wed Apr 27 15:04:47 2016

Cleaning ETMX vacuum dirty window

It looks very promising.

12096

Thu Apr 28 08:49:47 2016

possible noise sources schedule

PEM

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

12117

Sun May 15 19:48:08 2016

3-4 hrs ago we run out of nitrogen. We are back to Vacuum Normal

12119

Tue May 17 14:46:51 2016