 Tue Nov 27 16:18:58 2007, rob, Configuration, IOO, MC loop
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Reduced the common gain to 22dB in the [COLOR=blue]mcup[/COLOR] script, so that the WFS would not blow the lock. The above measure of the OLG was done
without the mcWFS running, so may be a low estimate as compared to when the alignment is perfect. |
 Wed Nov 28 16:46:28 2007, rana, Configuration, Computers, scientific linux 5.0
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I tried installing Scientific Linux on Tiramisu. The installation process was so bad (really)
that I quit after 15 minutes. Its back to booting Ubuntu as if nothing had ever happened. Let
us never speak of Scientific Linux again. |
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Wed Nov 28 17:15:26 2007, rana, Configuration, SUS, ETMY damping / watchdogs
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Steve has noted that ETMY was often tripping its watchdog. I saw this again today.
So I checked the damping settings. Someone had set the SIDE gain to +1. The gain which gives
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Wed Nov 28 21:51:52 2007, tobin, Configuration, PSL, ISS
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I replaced the front-end differential receivers for the ISS's "inner-loop" sensor and monitor diode inputs with lower-noise [url=http://focus.ti.com/docs/prod/folders/print/ths4131.html]THS4131[/url]'s
(formerly THS4151's). I verified operation by taking the transfer function from the "PD+" and "PD-" inputs (separately) to the testpoint following the
differential receiver; the surgery appears successful.
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Thu Nov 29 10:36:47 2007, alberto, Configuration, Computer Scripts / Programs, Agilent 82357B GPIB to USB Interface Installation Procedeure
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To run the Agilent Automation-Ready CD provided with the interface is only the first step of the installation. Apparently there should be also a second
CD with the drivers for Windows XP but I couldn't find it. So, after Installaing the IO Libraries Suite from the CD, I had to install the drivers with
an executable downloaded from the Agilent's website at:
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Thu Nov 29 14:29:22 2007, tobin, Configuration, Computers, linux1 httpd/conlogger fixed
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I think I fixed the [url=http://linux1/cgi-bin/conlog_web.pl]conlogger web interface on linux1[/url].
Steps necessary to do this:
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Thu Nov 29 15:17:53 2007, rob, Configuration, PSL, ISS
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I put some ISS beam on the diode on the PSL table. In the previous layout, this was the monitor diode (and it's labeled monitor) but I plugged it into
the sensor jack anyways so we can run with the loop closed for now; we can just switch the cables later. The reason the beam was unclear is because someone |
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Fri Nov 30 11:44:57 2007, rob, Configuration, Electronics, ETMX oplev
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In the interests of getting the Xarm alignment script working again, I reset the local damping gains for the test masses to their previous known working
values (1), then I noticed that the ETMX oplev was dead. Since the scripts use the oplev motion as a readback for the optic motion, this means the script
was basically blindly swinging the optics around. Some monkeying around with swapping HeNe power supplies eventually led to the conclusion that the power |
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Fri Nov 30 13:46:50 2007, rob, Configuration, Electronics, ETMX oplev dead again
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[quote]In the interests of getting the Xarm alignment script working again, I reset the local damping gains for the test masses to their previous known
working values (1), then I noticed that the ETMX oplev was dead. Since the scripts use the oplev motion as a readback for the optic motion, this means
the script was basically blindly swinging the optics around. Some monkeying around with swapping HeNe power supplies eventually led to the conclusion |
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Fri Nov 30 19:11:05 2007, rana, Configuration, Electronics, ETMX oplev dead again
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I removed the ETMX HeNe and put in on a test table and it fired up fine. In its
previous location the light on the HeNe power supply was not lighting up. If
that's still on over the weekend we'l blame the power strip; the HeNe is a JDS
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Fri Nov 30 19:29:14 2007, rana, Configuration, SUS, new screen
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Andrey is working on a new screen to show us the drift of the optics by alarming on
their osem values. [COLOR=darkred]You can find it under SUS as 'Drift Mon' from the site map.[/COLOR]
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Fri Nov 30 19:46:58 2007, rana, Configuration, Computers, EPICS Time Bad again
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The time on the EPICS screens is off by 10 minutes again. Por Que?
Its because the ntpd on scipe25 wasn't restarted after the last boot. If someone
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Fri Nov 30 20:17:26 2007, Andrey, Configuration, PEM, Accelerometers and alum.plates for them 
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All 6 accelerometers which were located near the ITMX are turned off and disconnected from the power cords.
Actually these accelerometers are now in the office area on the electronics bench (to the left from Steve Vass' place).
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Sun Dec 2 21:02:12 2007, rana, Configuration, IOO, MC SUS re-alignment
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[COLOR=purple][SIZE=2][B][FONT=Comic Sans MS]The spot on MC2 was not centered, so I put it back in the center:[/FONT][/B][/SIZE][/COLOR]
[LIST]
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Sun Dec 2 21:07:39 2007, rana, Configuration, IOO, MC SUS re-alignment
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[COLOR=darkblue][CODE]you asked for: diff 2007/12/01,4:58:48 2007/12/03,4:58:48 utc 'MC.*COMM'
LIGO controls: differences, 2007 12/01 04:58:48 utc vs. 2007 12/03 04:58:48 utc
__Epics_Channel_Name______ __Description__________ __value1____ __value2____
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Sun Dec 2 21:13:16 2007, rana, Configuration, IOO, MC SUS re-alignment
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Mon Dec 3 19:44:58 2007, Accelerometers on new mounts, Configuration, PEM, Andrey
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I (Andrey) continued today working with new accelerometer mounting. (see entry #151 about my Friday work).
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Mon Dec 3 22:20:09 2007, tobin, Configuration, PSL, ISS
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I replaced the painfully short 1' cables on the ISS photodiodes with luxurious five foot cables, made by chopping a ten foot Amphenol cable (P/N:CS-DSPMDB09MM-010)
in half and using each half for one of the diodes. All of the ISS GND connections are wired to the PD GND, as is the PD- differential signal. The diodes
are installed on the PSL table, but I have not tested them beyond looking at the DC values as I blocked/unblocked the beam. |
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Wed Dec 5 23:19:03 2007, Andrey, Configuration, PEM, Accelerometers are turned on 7x
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All accelerometers have been turned on, as Alan asked during Wednesday meeting.
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Thu Dec 6 19:19:47 2007, Andrey, Configuration, SUS, Suspension damping Gain was restored
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Suspension damping gain was disabled for some reason (all the indicators in the most right part of the screen C1SUS_ETMX.adl were red), it is now restored. |
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Mon Dec 10 19:08:03 2007, tobin, Configuration, PSL, MZ
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The MZ seems finicky today--it keeps unlocking and relocking.
I've temporarily blocked one of the MZ arms while I work on the ISS. |
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Mon Dec 10 20:35:59 2007, tobin, Configuration, Computer Scripts / Programs, autolocking scripts
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I added this tidbit of csh code to the MZ autolocker to prevent multiple copies from running (on one computer):
[code]if (`pgrep lockMZ | wc -l` > 1) then
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Thu Dec 13 23:56:02 2007, Andrey, Configuration, Computer Scripts / Programs, Overnight measurements
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[COLOR=blue]After my disease[/COLOR] (fever, vomitting, nose problem, overall weakness) [COLOR=blue]I returned to LIGO today[/COLOR] for the first time
after the weekend, and [COLOR=red]I am running the script for the XARM-measurements over this night[/COLOR].
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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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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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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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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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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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Fri Jan 18 20:53:56 2008, tobin, Configuration, General, ETMY oplev
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I monkeyed around with the ETMY oplev, adding a folding mirror and moving the HeNe so that John, Sam, and I have more room for our auxiliary laser setup.
(The ISCT-EY has more room than ISCT-EX; the latter has an extra photodiode for IP ANG.) I believe I successfully recommissioned the oplev, though it
might not be up to the SV standard. I verified that wiggling the ETMY alignment sliders showed corresponding wiggles in the oplev signals. However, it |
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Thu Jan 24 20:03:40 2008, Andrey, Configuration, SUS, Changes to Dataviewer channels (XARM)
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1) [COLOR=blue]Good news.[/COLOR] I added a chanel "C1:SUS-ETMX_POS" to Dataviewer.
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Thu Jan 24 22:10:49 2008, Andrey, Configuration, Computer Scripts / Programs, Problem with channels - help of Rana, Robert or Steve is needed
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I definitely spoiled something (changes some settings) by chaotically clicking those blue buttons (see my previous entry # 260).
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Fri Jan 25 08:55:26 2008, rob, Configuration, General, Changes to Dataviewer channels (XARM)
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As a general rule,
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Fri Jan 25 10:14:35 2008, rob, Configuration, SUS, Changes to Dataviewer channels (XARM)
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[quote]
2) [COLOR=red]BAD NEWS.[/COLOR] While "clicking the appropriate blue button" on the DAQ MEDM screen,
namely [COLOR=red]CODAQ_DETAIL,adl screen, I obviously clicked some blue button that I should not have clicked,
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Fri Jan 25 11:38:16 2008, josephb, Configuration, Cameras, Working GiGE video on Linux - sort of
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1)I have been able to compile the SampleViewer program which can stream the video from the Prosilica 750C camera. This was accomplished on my 64-bit laptop
running Ubuntu, after about 3 hours of explicitly converting strings to wxStrings and back again within the C++ code. (There was probably an easier way
to simply overload the functions that were being called, but I wasn't sure how to go about doing so). By connecting it to the CDS network, I was able |
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Fri Jan 25 13:36:13 2008, josephb, Configuration, Cameras, Working GiGE video on Mafalda
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Finally got the GiGE camera sample viewer video running on Mafalda by updating to the latest API (version 1.16 from Dec 16, 2007) from Prosilica and then
using the modified Sample Viewer code I had written. The API version previously in cvs was 1.14.
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Fri Jan 25 17:11:07 2008, Max , Andrey, Configuration, General, NEW_FETCH_SHOUROV and GET_DATA do not work
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The problem which started yesterday after Andrey's framebuilder restart still persists.
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Mon Jan 28 17:16:54 2008, Andrey, Configuration, Computers, Matlab libraries DO NOT WORK properly sometimes
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Working in Matlab, I encountered at two different times today the license distribution problem:
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Thu Jan 31 12:39:14 2008, John, Configuration, General, Y arm test mass cameras
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| I've adjusted the test mass cameras on the y arm to make the beam injected through ETMY more visible. |
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Thu Jan 31 16:53:41 2008, josephb, Configuration, Cameras, Improving camera user interface
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There's a new and improved version of Snap program at the moment people are free to play with.
Located in /cvs/cds/caltech/target/Prosilica/40mCode/
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Fri Feb 1 15:04:54 2008, josephb, Configuration, Cameras, Snap with looping functionality available
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New GiGE camera code is available in /cvs/cds/caltech/target/Prosilica/40mCode/. Currently only runs on Mafalda.
Snap has expanded functionality to continuously loop infinitely or for a maximum number of images set by the user. File names generated with the loop |
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Tue Feb 5 15:32:29 2008, josephb, Configuration, Cameras, PMC and the GigE Camera
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The PMC transmission video camera has been removed and replaced with the GigE GC750 camera for the moment.
A ND4.0 filter has been added in the path to that camera to reduce saturation for the moment.
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Tue Feb 5 17:39:05 2008, jweiner, Configuration, PEM, PEM-AS_MIC taken down from AS table, will put in PSL enclosure soon
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I took down the microphone that Andrey hung above the AS table his first week in lab. I want to hang the microphone above the PMC to check the effect of
acoustic noise on the PMC. The cables were a little more tangled than I thought so I've only taken the microphone down and haven't hung it back up yet,
but on Thursday I'll have enough time to carefully put it up inside the PSL and see what I can find out about acoustic noise inside the PSL. I think the |
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Wed Feb 6 16:50:47 2008, josephb, Configuration, Cameras, Regions of Interest and max frame rate
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The Snap code has once again been modified such that setting the -l option to 0 will take images as fast as possible. Also, the -H and -W options set the
height and width, while in principle the -Y and -X options set the position in pixels of the top edge and left edge of the image. It also seems possible
to set these values such that the saved image wraps around. I'll be adding some command checking so that the user can't do this in the near future.
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Wed Feb 6 19:39:11 2008, rana, Configuration, Cameras, Regions of Interest and max frame rate
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| We really need to look into making the 40m CDS network have an all GigE backbone so that we can have cooler cameras as well as collect multiple datastreams... |
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Fri Feb 8 17:55:53 2008, josh, Configuration, PEM, PEM-AS_MIC now in PSL enclosure
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I have moved the microphone to the PSL enclosure, hanging near the south (Y) side from a support rod for the overhanging storage area so that it's reasonably
close to the PMC. I've fastened it in many places using cable ties to make sure that it won't fall.
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Sun Feb 10 21:43:16 2008, rob, Configuration, IOO, MC alignment tweaked
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I adjusted the alignment of the free hanging mode cleaner to best transmit the PSL beam. |
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Mon Feb 11 22:44:29 2008, rob, Configuration, DAQ, Change in channel trending on C1SUS2
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I removed the MC2 optical lever related channels from trends, and the SRM POUT and YOUT (as these are redundant if we're also trending PERROR and YERROR).
I did this because the c1susvme2 processor was having bursts of un-syncy lateness every ~15 seconds or so, and I suspected this might interfere with locking |
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Tue Feb 12 16:18:29 2008, rob, Configuration, Computer Scripts / Programs, autoburt cron moved to op340m
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I moved the autoburt cron job from op440m to op340m. For some reason, [B]burtrb[/B] requires gcc to run (I gather it uses the C-preprocessor to parse
input files), so I had to install that on op340m to get it to work properly.
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Thu Feb 28 16:19:37 2008, josephb, Configuration, Computers, Mafalda rewired and multiple cameras running
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1) Mafalda is now connected via an orange Cat5E ethernet cord to the gigabit ethernet switch in rack in the office space. It has been labeled at both
ends with "mafalda".
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Thu Feb 28 19:37:41 2008, rob, Configuration, Computers, multiple cameras running and seisBLRMS
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[quote]1) Mafalda is now connected via an orange Cat5E ethernet cord to the gigabit ethernet switch in rack in the office space. It has been labeled
at both ends with "mafalda".
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