 Thu Jun 3 22:17:05 2010, rana, Update, PEM, seismometers off of linoleum floor 
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At ~2350 UTC on June 2, the seismometers were turned off. After the granite slab was repositioned with the new lead, the Ranger was turned on,
but not the Guralps.
Now, after ~24 hours, I have put the Guralps onto the granite and turned them on. During this off time, the input channels should be ADC noise |
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Fri Jun 4 23:52:57 2010, rana, Update, PEM, seismometers off of linoleum floor
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 Wed Nov 18 01:12:15 2009, rana, Update, PEM, seismometers were not saturating during Halloween weekend
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Thu Aug 23 10:08:13 2012, Steve, Update, PEM, seismometers?
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Quote:
It seems as though there is something funny going on around ~1.5 Hz, starting a little over an hour ago. |
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Sun Dec 3 05:25:59 2017, gautam, Configuration, Computers, sendmail installed on nodus
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Pizza mail didn't go out last weekend - looking at logfile, it seems like the "sendmail" service was missing. I installed sendmail following
the instructions here: https://tecadmin.net/install-sendmail-server-on-centos-rhel-server/
Except that to start the sendmail service, I used systemctl and not init.d. i.e. I ran |
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Sun Dec 3 17:01:08 2017, Koji, Configuration, Computers, sendmail installed on nodus
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An email has come at 5PM on Dec 3rd.
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Mon Jan 27 17:49:46 2014, rana, HowTo, Computer Scripts / Programs, sendmail started on nodus: fixing SwiftMail on Dokuwiki
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Since the recent filesystem fracas, the new accounts could not be created on nodus / dokuwiki (for the controls workshop, for example).
I started sendmail on nodus using the command: sudo /etc/init.d/sendmail start
and the SwiftMail plugin on there is now sending out the confirmation emails again. This will happen each time we reboot nodus, so let's replace |
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Fri Jan 12 12:31:04 2018, gautam, Configuration, Computers, sendmail troubles on nodus
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I'm having trouble getting the sendmail service going on nodus since the Christmas day power failure - for some reason, it seems
like the mail server that sendmail uses to send out emails on nodus (mx1.caltech.iphmx.com,
IP=68.232.148.132) is on a |
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Fri Jan 12 16:01:27 2018, Koji, Configuration, Computers, sendmail troubles on nodus
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I personally don't like the idea of having sendmail (or something similar like postfix) on a personal server as it requires a lot of maintenance
cost (like security update, configuration, etc). If we can use external mail service (like gmail) via gmail API on python, that would easy our worry, I
thought. |
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Fri Jan 12 18:22:09 2018, gautam, Configuration, Computers, sendmail troubles on nodus
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Okay I will port awade's python mailer stuff for this purpose.
gautam 14Jan2018 1730: Python mailer has been implemented: see here for the files. On shared |
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Sat Jan 13 02:36:51 2018, rana, Configuration, Computers, sendmail troubles on nodus
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| I think sendmail is required on nodus since that's how the dokuwiki works. That's why the dokuwiki was trying to send an email to Umakant. |
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Sat Jan 13 03:20:55 2018, Koji, Configuration, Computers, sendmail troubles on nodus
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| I know it, and I don't like it. DokuWiki seems to allow us to use an external server for notification emails. That would be the way to go. |
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Tue Jun 21 23:29:41 2011, kiwamu, Update, LSC, sensing matrix measurement
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I am now measuring the sensing matrix in the DRMI configuration.
A goal of tonight is to measure the sensing matrix as a test of the script.
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Wed Jun 22 17:42:03 2011, kiwamu, Update, LSC, sensing matrix measurement
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The sensing matrix was measured in the DRMI configuration for the first time.
The measurement was done by an automatic script and the realtime LOCKIN
module built in the c1lsc model. |
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Tue Jun 28 15:20:08 2011, kiwamu, Update, LSC, sensing matrix measurement in PRMI configuration
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Here is the result of the measurement of the sensing matrix in the PRMI configuration.
If we believe the resultant matrix, it is somewhat different from what
we expected from a finesse simulation (summary of simulated |
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Wed Jun 29 12:20:53 2011, kiwamu, Update, LSC, sensing matrix measurement in PRMI configuration
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Of course I made a mistake in my calculation of the sensing matrix. I will figure
out which point I mistook.
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Wed Feb 15 05:29:22 2012, kiwamu, Update, LSC, sensing matrix of PRMI
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I have measured the sensing matrix of PRMI.
It seems that the MICH signal in the 3f ports (REFL33 and REFL165) were quite tiny, and because of that
it is very tough to use them for the actual MICH control. |
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Wed Feb 15 17:15:33 2012, kiwamu, Update, LSC, sensing matrix of PRMI
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I think I have told a lie in the last meeting -- the measured sensing matrix doesn't look similar to what Optickle
predicts.
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Thu Feb 16 07:38:24 2012, Koji, Update, LSC, sensing matrix of PRMI
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| So why don't you use AS55I and Q for the control of PRMI??? |
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Thu Feb 16 13:12:30 2012, rana, Update, LSC, sensing matrix of PRMI
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Quote:
I think I have told a lie in the last meeting -- the measured sensing matrix doesn't look similar |
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Fri Feb 17 04:45:48 2012, kiwamu, Update, LSC, sensing matrix of PRMI
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I locked the PRMI with the AS55I and Q combination.
It seems the glitche rate decreased,
but I am not 100 % sure because the rest of the demod signals (i.e. REFL11 and etc) were showing relatively big signals (noise ?), which may cover |
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Wed Mar 23 05:11:08 2011, kiwamu, Update, Green Locking, servo handig off
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Succeeded in handing off the servo from the green to the red.
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Wed Mar 23 08:50:36 2011, Aidan, Update, Green Locking, servo handig off
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Nicely done!
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Sun Sep 22 21:28:53 2013, rana, Update, SUS, set OL T RAMP values (they are not visible on the OL screens)
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controls@rosalba:/opt/rtcds/caltech/c1/scripts/SUS 0$ ./setOLtramps
Old : C1:SUS-ETMX_OLPIT_TRAMP 0
New : C1:SUS-ETMX_OLPIT_TRAMP 2 |
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Tue Jul 9 11:37:37 2013, gautam, Update, CDS, set up for testing DAC Interface-board pin outs
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The bank marked channel 9-16 is free, but the connector is a 40 pin IDC and I need to know the exact pin-out configuration before I can set about making
the custom ribbon cable that will send the control signals from the DAC card to the PZT driver board.
The DAC interface board on rack 1Y4 seems to be one of the first versions of this board, and has no DCC number anywhere on it. Identical modules |
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Tue Jul 9 12:01:20 2013, gautam, Update, CDS, set up for testing DAC Interface-board pin outs
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Jenne just rebooted c1scy and daqd on the framebuilder. We will do the actual test after lunch. |
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Thu Aug 12 11:59:31 2010, kiwamu, HowTo, CDS, set up ntp daemom
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(sad story)
When I was working on a new front end machine c1sus, I found that make command didn't run and gave the following message.
" |
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Tue Apr 28 16:36:24 2009, rob, HowTo, Locking, setting the RF CARM demod phase
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To set the demod phase for RF CARM, sensed at REFL2 (REFL 166I), it suffices to set the demod phase for REFL2 to be the optimal phase for controlling
SRCL in a no-arm state. |
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Tue Apr 28 17:51:13 2009, rob, HowTo, Locking, setting the RF CARM demod phase
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Quote:
To set the demod phase for RF CARM, sensed at REFL2 (REFL 166I), it suffices to set the demod phase for REFL2 to be |
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Thu Sep 30 18:51:50 2010, yuta, Update, Computers, setting up aldabella and mariabella
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(Kiwamu, Yuta)
Background: |
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Mon Nov 6 09:09:43 2017, Steve, Update, VAC, setting up new TP2 turbo
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Our new Agilent Technology TwisTorr
84FS AG rack controller ( English Manual pages 195-297 ) RS232/485, product number X3508-64001, sn IT1737C383
This controller, turbo and |
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Thu Nov 11 05:56:04 2010, yuta, Summary, IOO, setting up temporary oplev for coil balancing of MCs
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(Suresh, Yuta)
Background: |
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Sun Oct 24 18:06:35 2010, kiwamu, Summary, Locking, setup for green beat
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(notes on signal level) |
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Mon Oct 25 02:14:38 2010, Koji, Summary, Locking, setup for green beat
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- What is the actual photocurrent for the beam1 and beam2? We don't care how much power do you have before the BS, but care how much current do you have
on the PD.
- How much is the visibility? There is mismatching of the beams. i.e. The beam diameter looked quite different. Also the beams are not TEM00 but |
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Tue Jul 8 10:26:30 2008, Masha, Update, Auxiliary locking, setup updates
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Yesterday I changed one of the beam splitters in the Mach Zehnder to one with a more stable mount as to reduce the system's coupling to environmental noise.
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Mon Oct 4 19:48:00 2010, yuta, Update, VAC, several mirrors installed to ITMX/BS chamber
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(Koji, Kiwamu, Yuta)
Lots of progress for the optics placement in the vacuum chamber. |
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Tue Jan 28 08:26:53 2020, rana, Frogs, PEM, shaking
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https://breakthrough.caltech.edu/magazine/2019-aug/#article-Listening-with-Light
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Thu Nov 8 15:57:53 2007, tobin, Configuration, PSL, shelf removed
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I removed the sheet metal shelf from the PSL enclosure, for easier access to the ISS.
ISS investigations ongoing. |
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Thu Jan 11 14:47:11 2018, Steve, Update, PSL, shelf work for tomorrow
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I have just received the scheduling of the PSL self work for tomorrow. Gautam and I agreed that if it is needed I will shut the laser off and cover the
hole table with plastic. |
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Fri Aug 3 13:05:28 2012, Den, Update, PEM, shims
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As we do not have legs for Trillium, I was advised to use shims to adjust the levels. However, they produce extra resonance at ~30 Hz + harmonics. Coherence
is lost at these frequencies.
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Fri Aug 3 14:52:11 2012, Jenne, Update, PEM, shims
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Quote:
As we do not have legs for Trillium, I was advised to use shims to adjust the levels. However, they produce extra resonance at ~30 Hz + harmonics. |
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Wed Aug 18 12:24:58 2010, josephb,kiwamu, Update, CDS, shmem issue
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Apparently its possible to have working models get into a bad state in regards to shared memory, which prevents the model from working after killing
it and restarting it. We found that by shutting all the models down, and then killing and restarting the setup_shmem process, it allowed models to
function properly again. |
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Tue Dec 4 10:44:36 2012, Steve, Update, PEM, short power outage
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CALIFORNIA
INSTITUTE OF TECHNOLOGY |
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Mon Sep 30 13:20:55 2019, aaron, Update, IOO, shot noise measurement
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I wanted to measure the RF transimpedance of the WFS heads, as outlined above.
Summary: Measurement is not done.
Details: |
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Wed Aug 31 11:37:56 2011, steve, Update, Green Locking, shutter in place at east end
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| Uniblitz mechanical shutter installed in the green beam path at ETMY-ISCT The remote control cable has not been connected. |
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Wed Oct 30 14:58:44 2013, Steve, HowTo, General, shutting down a computer
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We have tried to ssh into c1iscey yesterday morning. It just did not work. We have just tried it again (now) and it did work.
Lesson learned: always shut |
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Mon Oct 3 04:43:03 2011, kiwamu, Update, LSC, sideband-resonance PRMI locked
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My goal of today was to lock PRMI without using AS55 and it is 50% successful.
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Sat Feb 26 02:33:16 2011, kiwamu, Update, Green Locking, sidebands on beatnote
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The power ratio of
the beatnote signal vs. the 216kHz sideband has been measured.
The measured ratio was -55 dB, which is smaller by about 20 dB than Aidan's |
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Sun Feb 27 09:43:59 2011, Aidan, Update, Green Locking, sidebands on beatnote
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Can we set up a fiber-PD on the end table to look at the beat between the "end laser IR beam" and the "PSL IR beam fiber-transmitted end
beam"?
We should see the same thing on that PD that we see on the green PD (plus any fiber noise and I'm not really sure how much that'll be off the top |
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Sun Feb 27 13:09:56 2011, rana, Update, Green Locking, sidebands on beatnote
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When Koji and I were massaging the MC, we noticed that the oscillations were at 48.5 kHz. They were pretty huge and are probably what you're seeing on
the beat. My guess is that they are the PZT resonances of the PSL 2W NPRO; we need to put a notch in the FSS box - it still has the notch from the old
NPRO. |