 Thu Jan 17 20:50:55 2008, tobin, Update, General, fiber coupling
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Sam, John, and I matched the beam from an NPRO into a fiber on the SP table today. In doing so we used our GigE camera for a physics application for perhaps
the first time, viewing the transmitted mode from the fiber during initial alignment. (I used my laptop running Windows and a 100 megabit switch.) |
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Thu Jan 17 15:11:13 2008, josephb, Update, Cameras, Working on Malfalda
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1) I can statically compile the ListCamera code (which basically just goes out and finds what cameras are connected to the network) on Malfalda and use
that compiled code to run on Linux2 without a problem. Simply needed to add explicit links to libpthread.a and librt.a.
(i.e. -Bstatic -L /usr/lib/ -lpthread -Bstatic -L /usr/lib -lrt)
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Thu Jan 17 14:13:20 2008, rob, Update, LSC, Wednesday's locking
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Incremental progress on locking yet again. This time the handoff of DARM to the OMC worked, and progress halted at handing off control of the common mode
to REFL166. |
Wed Jan 16 19:57:49 2008, tobin, Configuration, Photos, ISCT_EX 
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Here's a photo of the ISCT_EX table, for the purpose of planning our auxiliary laser arm locking scheme. Note the (undumped!) beam from the beamsplitter
before QPDX (the leftmost gold-colored box); perhaps we could inject there. |
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Wed Jan 16 18:24:41 2008, rana, Update, SUS, ETMY Watchdog
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Because [COLOR=purple][B]Steve keeps complaining about ETMY[/B][/COLOR], I looked at some minute trend to see if there was something exotic happening at
that time. It looks like there is some tremendous seismic activity to make it happen.
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Wed Jan 16 14:09:45 2008, rob, Update, LSC, tuesday's locking
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I got a little further with the locking (PRFPMI) last night, after discovering that the cable going from the CM board to the MC board was unplugged at
the MC side. This explains why we weren't able to engage the AO path last night. Tonight, I got up to the point where DARM is handed off to OMC transmission, |
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Wed Jan 16 14:06:24 2008, rob, Update, LSC, monday's locking
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rob, tobin, johnnie
We did some locking work monday night, with decent progress. Working in the PRFPMI style, we managed to get through the part of the script that hands |
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Tue Jan 15 13:15:27 2008, tobin, Update, Environment, lots of noise
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| They're throwing concrete around at the construction site. |
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Mon Jan 14 23:11:26 2008, tobin, Configuration, General, fiber
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John and I removed the fiber that ran from the SP table to the cleanroom. We plan to build a MZ interferometer with this fiber inserted into one of the
arms, for the purpose of measuring its phase noise. |
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Mon Jan 14 14:41:09 2008, steve, Update, SUS, etmy sus damping restored & mz relocked
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Tree days trend of MZ HV drift is typical these days.
So as the etmy sus inability to hold damping for longer then 2-3 days. |
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Fri Jan 11 17:01:51 2008, pkp, Update, Cameras, GigE again
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So, here I detail all the efforts on the GigE so far
(1) The GiGE camera requires a minimum of 9 kb packet size, which is not available on mafalda or on my laptop ( both of which run Ubuntu and the Camera |
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Thu Jan 10 15:04:04 2008, steve, Update, SUS, illuminator light effect on BS position
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The bs chamber illuminator light was turned on this morning and left on.
Earlier on Rana noticed that the bs moved.
I follwed up to see what happened. I turned off oplev servo and tried to recenter on oplev pd
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Thu Jan 10 13:45:52 2008, Pkp, Update, Cameras, GLIBC Error
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So, I have tried to compile the camera files which are in /cvs/cds/caltech/target/Prosilica/examples for the past 2 days now and have been unable to get
rid of the following error. (specifically ListCameras.cpp, as it doesnt have any other libraries required, which unnecessarily complicates things)
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Thu Jan 10 12:08:23 2008, steve, Update, SUS, why did the BS move?
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Thu Jan 10 10:38:02 2008, steve, Update, SUS, etmy damping restored
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The IST building onstruction has really started yesterday and continuing today with big heavy ground breaking
machinary. The MC is holding lock and the suspentions are hanging on.
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Thu Jan 10 00:12:01 2008, tobin, Summary, Locking, DR
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[John, Tobin, Rana]
1. We found SUS_BS_SENSOR_UL to have a ratty signal and low DC value. Twiddling the cables at the BS satellite amplifier and vacuum feedthrough brought |
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Wed Jan 9 20:36:42 2008, Go, Update, Treasure, Money in lab
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| Go's Desk. |
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Wed Jan 9 20:29:47 2008, Dmass, AoG, TMI, Coffee Carafe
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If you have been using the coffee machine in the 40m, you may have noticed small brown flecks in your coffee mug. The carafe in the 40m has accumulated
a layer of what is presumed to be old dried up coffee. When a small amount of water is swirled around in the bottom, flecks of the brown layer come off.
Pictures below are of the inside of the carafe.
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Wed Jan 9 10:47:15 2008, fricke, Update, Computers, ethernet wiring in office/control room
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The electrical people have been here for three days, installing ethernet cables and drops in the 40m office area, in the old conduits where there was power
and 10base2. Soon we will have reliable ethernet connections, instead of relying on switches hanging from the ceiling, etc! |
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Tue Jan 8 15:20:17 2008, Pkp, Update, Cameras, GigE update
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[Tobin , Pinkesh]
Finally we got the camera doing something (other than giving out its attributes). The only thing that seems to work so far is a program called AAviewer, |
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Mon Jan 7 09:01:39 2008, steve, Update, SUS, BS sus damping restored
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| The BS sus damping was lost at 8am Sunday morning. |
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Fri Jan 4 08:42:03 2008, steve, Update, SUS, etmy trips again
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ETMY sus damping tripped at 6am this morning
It was reset. We should put an accelerometer to the south end to see
the garbage dumping effect. |
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Thu Jan 3 09:55:11 2008, steve, Update, SUS, etmy sus damping restored
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| ETMY watch dog was lost at midnight |
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Thu Jan 3 09:12:59 2008, steve, Update, PSL, MZ servo
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Here is MZ trend for one year and 40 days.
Now days it runs out of range on the low side.
This is the weakest link in the psl today. |
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Thu Jan 3 08:53:55 2008, steve, Update, SUS, etmy vs etmx
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Rana have corrected sus gain damping setting of ETMY 8 days ago
gain settings: pos, pit, yaw & sd
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Wed Jan 2 11:38:56 2008, tobin, Summary, WIKI-40M Update, wiki spam
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Our wiki keeps getting spammed. It turns out that you can upload attachments without a password, which is a bug. I'll ask David Barker whether there's
a fix for this. |
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Sun Dec 30 02:36:35 2007, pkp, Update, General, Another update
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So I followed suggestions 1 and 3 so far and have started writing up what all needs to be done in order to compile and use the camera. I wrote a program
to ping the camera and get its properties and am working on a program to get an image. The reason why I want to write my own programs to do this, is that
it will be easier to reuse and also to compile/use in the first place. The programs currently rest in /cvs/cds/caltech/target/Prosilica/ . Unfortunately |
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Thu Dec 27 12:12:02 2007, pkp, Update, , Update on GigE Camera
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So I finally got the linux software to compile on mafalda. I got the software to dump all the information regarding the camera onto a file. I tried to take
a tiff snap and came up empty. So I looked at the configuration file and realized that the camera thinks that the frame-rate is a nan. Am reading up the
manual to fix the frame-rate manually and then will attempt to take another snap.
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 Thu Dec 27 18:18:56 2007, rana, Update, Computers, Update on GigE Camera
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[quote]So I finally got the linux software to compile on mafalda. I got the software to dump all the information regarding the camera onto a file. I tried
to take a tiff snap and came up empty. So I looked at the configuration file and realized that the camera thinks that the frame-rate is a nan. Am reading
up the manual to fix the frame-rate manually and then will attempt to take another snap.
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Wed Dec 26 15:00:06 2007, rana, Update, SUS, ETMY tripping
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Steve mentioned to me that ETMY is still tripping more than ETMX. The attached DV plot
shows the trend of the watchdog sensors; essentially the RMS fluctuations of the shadow
sensors. (note** DV can make PNG format plots directly which are much better than JPG
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Wed Dec 26 15:12:48 2007, rana, Update, SUS, ETMY tripping
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It turned out that the ETMY POS damping gain was set to 1.0 while the ETMX had 3.8.
I put both ETMs to a POS gain of 4 and then also set the PIT, YAW and SIDE gains for
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Thu Dec 27 13:08:04 2007, rana, Update, SUS, ETMY tripping
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Here's a trend from the last 2 days of ETMX and ETMY. You can see that the damping gain increase
has made them now act much more alike. Problem fixed. |
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Sat Dec 22 15:32:11 2007, tobin, AoG, Environment, ants
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Ants are everywhere: on the PSL table, on the circuit board I'm soldering...
I believe I have discovered their energy source. |
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Sat Dec 22 00:52:57 2007, tobin, Configuration, PSL, ISS surgery
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In an attempt to quell oscillations in the (unused) outer loop portion of the ISS, I shorted the "PD+" and "PD-" signals from the (nonexistent) outer-loop
diodes, and soldered in 47pf compensation capacitors in C92 and C220. This seems to have eliminated oscillations seen at TP41 and TP42. There's still
something amiss at TP30 and maybe TP20. Otherwise, the ISS seems happy. I can turn the gain slider to +15dB without saturation (with the HEPA off), though |
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Fri Dec 21 20:32:25 2007, tobin, Update, Photos, GigE camera
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I couldn't resist any longer: I plugged in the Prosilica GC 750 GigE camera and took it for a spin. This is the little CMOS camera which sends out video
over gigabit ethernet.
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Thu Dec 20 21:58:28 2007, Andrey, Summary, Computer Scripts / Programs, Results for 2 previous XARM measurements have been added
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I attached results (plots) of yesterday's daytime and overnight measurements to the initial reports about those measurements.
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Thu Dec 20 21:57:34 2007, Andrey, Update, Computer Scripts / Programs, Measurements in XARM today
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Today at 2PM I started a program, it should change the suspension gains in the interval from 1.0 to 3.8 with the step 0.2. Estimated running time is till
3.30AM coming night.
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Thu Dec 20 19:10:03 2007, waldman, Update, OMC, Stressful reattachment of heater
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Photos may follow eventually, but for now here's the rundown. I scraped the heater clean of the thermal epoxy using a clean razor blade. Then I stuffed
a small piece of lint free cloth in the OTAS bore and wrapped the OMC in tin foil. With a vacuum sucking directly from the face of the OTAS, I gently
scraped the glue off the OTAS aluminum. I wiped both the OTAS and the heater down with an isoproponal soaked lint-free cloth. I put a thin sheen of VacSeal |
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Thu Dec 20 19:05:34 2007, waldman, HowTo, OMC, HOWTO build front ends
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For instance, to build the TPT front end code.
[LIST]
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Thu Dec 20 02:04:09 2007, Andrey, Update, Computer Scripts / Programs, New overnight measurements in XARM and their results 11x
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I ran in the daytime/evening time my program, changing the damping gains in suspension "position" degree of freedom for ETMX and ITMX
in the interval from 1.00 to 3.75 with the step 0.25 (see entry # 201).
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Wed Dec 19 20:28:27 2007, Andrey, DAQ, PEM, Names for all 6 accelerometers have been changed
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I eventually [COLOR=red]changed the names for all 6 accelerometers[/COLOR] (see my ELOG entry # 172 from Dec. 05 about my intent to do that).
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Wed Dec 19 16:40:12 2007, steve, Update, SAFETY, laser safety glasses measured
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I measured the coarse transission at 1064nm of the 40m safety glasses today.
12 pieces of UVEX # LOTG-YAG/CO2 light green, all plastic construction, ADSORBANT
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Wed Dec 19 16:07:37 2007, Andrey, Summary, Computer Scripts / Programs, Results of overnight measurements Tue/Wed night (entry #198) 11x
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As indicated in ELOG entry 198, I was making [COLOR=red]overnight measurements during last night from Tuesday to Wednesday[/COLOR].
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Wed Dec 19 15:51:00 2007, Andrey, Update, Computer Scripts / Programs, Daytime measurements in XARM and their results 11x
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I was making measurements in XARM for three different nights. All the results agree with each other (I will put the results from the last night soon).
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Wed Dec 19 11:31:01 2007, steve, Omnistructure, PEM, aircond filter maintenance
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Jeff is working on all air condiontion units of the 40m lab
This we do every six months. |
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Tue Dec 18 23:41:00 2007, Andrey, Summary, Computer Scripts / Programs, Results of Mon/Tue overnight measurements (entry #194) 12x
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Here I inform our community about the results of the measurements of RMS values in XARM during the previous night from Monday to Tuesday (I announced those
measurements in ELOG entry #194).
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Tue Dec 18 23:27:36 2007, Andrey, Configuration, Computer Scripts / Programs, New overnight measurements (this night from Tue to Wed)
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[COLOR=red]I am making overnight measurements in XARM tonight.[/COLOR]
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Tue Dec 18 21:31:31 2007, tobin, Update, PSL, ISS RIN
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My measurements of the ISS RIN via the SR785 and via the DAQ disagree considerably. The spectral shapes are very similar, however, so I expect that a constant
factor is creeping in somewhere. Measurements taken at the PD DC monitor points using the SR785 attached. There is a lot of excess noise in the 300 Hz
- 1 kHz region. |
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Tue Dec 18 16:50:35 2007, tobin, Update, SAFETY, uvex laser safety glasses defective
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A few days ago we noticed what appeared to be a blotched, speckled fracturing of the coating of the "UVEX" laser safety glasses. These are the glasses
with "transparent" (reflective to 1064nm) lenses and white frames that we keep in a box on top of a filing cabinet in the control room. Today Steve measured
the transmission of these glasses and found [b]80% transmission of 1064nm[/b] in several cases.
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Tue Dec 18 00:51:39 2007, Andrey, Update, Computer Scripts / Programs, Results of Saturday overnight measurements 11x
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As I indicated in the previous e-log entry (#194), I made overnight measurements in XARM in the night from Saturday to Sunday.
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Mon Dec 17 23:42:08 2007, Andrey, Configuration, Computer Scripts / Programs, Overnight measurements in X-arm
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I am making overnight measurements this night (from Monday to Tuesday) in XARM.
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Mon Dec 17 11:47:13 2007, alberto, Update, Electronics, an alternative design for the RFAM monitor's filter at 33Mhz
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Since the Butterworth turned out o be rather wide-band, I tried an other configuration for the 33 MHz filter. Attached are the simulated transfer function
and the measured. As one can see, the measured peak is much broader than expected. |
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Sun Dec 16 16:52:40 2007, dmass, Update, Computers, Computer on the end Fixed
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I had Mike Pedraza look at the computer on the end (tag c21256). It was running funny, and turns out it was a bad HD.
I backed up the SURF files as attachments to their wiki entries. Nothing else seemed important so the drive was (presumably) swapped, and a clean copy |