 Wed Nov 17 07:32:48 2021, Chub, Update, General, wire clamp plate mod
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This will be difficult to modify with the magnets and dumbells in place. Even if someone CAN clamp this piece into an endmill machine with the
magnets/dumbells in place, the vibration of the cutting operation may be enough to break them off. |
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Wed Nov 17 11:53:27 2021, Koji, Update, General, wire clamp plate mod
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Of course, we remove the magnet-dumbbell for machining. After that the part will be cleaned/baked again. And Yehonathan is going to glue the magnet-dumbbell
again. |
Thu Aug 18 08:17:16 2016, Steve, Update, SUS, wire clamping preparation 
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The wire inprints were removed by 800P grain paper [Norton 73568] The SS bridge block now has an undesireble vally in the wire location.
The sus bridges were soaked in acetone over night and sonicated to remove residual sand paper.
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 Wed Mar 16 15:36:03 2016, Steve, Update, SUS, wire standoff test cut
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Ruby wire standoff 1 mm od. with V-groove test cut. SOS sus
wire 0.0017" od. is in the background.
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Wed Mar 16 16:02:40 2016, Koji, Update, SUS, wire standoff test cut
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| It looks almost OK, but we need a bit sharper picture for both the groove and thw wire. |
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Fri Sep 25 11:08:33 2015, Steve, Update, SUS, wire standoffs
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Our last effort to change the existing Al-6061 wire standoffs was at April 2012
We requested sapphire and/or ruby materials with smaller R at the bottom of the groove. Groove polishing was asked for.
Insaco Inc. quote 84740 as " best effort " NO POLISHING. The groove cut to be with eximer |
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Wed Jul 8 11:13:36 2009, Alberto, Omnistructure, Computers, wireless router disconnected
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Once again, this morning I found the wireless router disconnected from the LAN cable. No martian WiFi was available.
I wonder who is been doing that and for what reason. |
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Wed Dec 13 09:49:23 2017, johannes, Update, ASS, wiring diagram
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I attached a wiring schematic from the slow DAQ to the eurocrate modules. Of these, pins 1-32 (or 1A-16C) and pins 33-64 (17A-32C) are on separate DSub
connectors. Therefore the easiest solution is to splice the slow DIO channels into the existing breakouts so we can proceed with the transition. This will
still remove a lot of the current cable salad. For the YEND we can start thinking about a more elegant solution (For example a connector on the front panel |
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Sun May 15 14:01:56 2011, kiwamu, Update, IOO, wiring diagram for IP-POS
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Here is a wiring diagram which shows how IP-POS (new official name is IB_POS) is connected.
Another thing we have to remember is : at some point we will also connect some more QPDs (e.g. POX, POY,
AS, REFL and POP) in the same way. |
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Mon May 16 11:14:36 2011, rana, Update, IOO, wiring diagram for IP-POS
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Just FYI, the 3113 is a 12-bit ADC, so we won't get very good resolution out of these. We should get one of those purple boxes.
Also, I corresponded some with Dave Barker. The 40m Wiki at LHO is down because of disk errors. He's working on it and will let us know. But suggests
that we move it to Caltech since he'll turn the box off at the end of the year. |
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Mon Nov 25 10:57:14 2013, Koji, Update, CDS, woes on the X-end hosts
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This morning I came in the 40m then found
1) c1auxex was throwing out the same errors as recently seen.
2) c1iscex processes had errors which persisted even after the mx stream reset. |
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Fri Jan 27 19:40:03 2017, rana, Metaphysics, elog, word wrapping & large images
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"Why does the word wrapping not work in our browsers with ELOG?" I sometimes wonder. Some of the elogs are fine, but often the 40m one has
the text run off the page.
I found that this is due to people |
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Thu Jun 23 02:12:12 2011, Sonali, Update, Green Locking, work schedule.
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June 22-June 24:
1.Coupling light into fibre at the ETMY.
2.Routing of the fibre to the PSL table. |
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Tue May 26 11:05:10 2015, Steve, Update, PEM, worked around ETMY seism.
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| The cable tray holder cross beam is removed and cut short for good access to seismometer. |
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Wed Aug 10 10:32:44 2016, Steve, Update, SEI, working Guralps as they are 6x
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The saga has started here We have to give credit to the Boss who fixed it. The seismometers
themself are not labeled yet.
Atm6 added on 8-12-2016 EX needed to be centered |
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Fri Oct 30 04:41:37 2009, rob, Update, Locking, working again
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I never actually figured out exactly what was wrong in entry 2162, but I managed to circumvent
by changing the time sequence of events in the up script, moving the big gain increases in the common mode servo to the end of the script. So the
IFO can be locked again. |
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Mon Sep 21 15:22:19 2015, jamie, Update, DAQ, working on new fb replacement
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I've been putting together a new machine that Rolf got for us as a replacement for fb.
I've installed and configured the OS, and compiled daqd and the necessary supporting software. I want to try acquiring data with it.
This will require removing the current/old fb from the DAQ network, and adding the new machine. It should be able to be done relatively non-invasively, |
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Tue Nov 24 14:33:22 2009, Alberto, Update, ABSL, working on the AP table
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| I'm working on the AP table. I also opened the auxiliary NPRO shutter. The auxiliary beam is on its path on the AP table and PSL table. |
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Tue Nov 24 19:16:02 2009, Alberto, Update, ABSL, working on the AP table
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Quote:
I'm working on the AP table. I also opened the auxiliary NPRO shutter. The auxiliary beam is on its path on the AP |
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Fri Aug 12 14:37:34 2016, Steve, Update, SEI, working seismometers as they are
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2.1 mag earth quake in Norhten Ca
Our seimometers need professorial centering. Related electronics must be checked too.
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Sat May 4 00:21:00 2013, rana, Configuration, Computers, workstation updates
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Koji and I went into "Update Manager" on several of the Ubuntu workstations and unselected the "check for updates" button.
This is to prevent the machines from asking to be upgraded so frequently - I am concerned that someone might be tempted to upgrade the workstations to
Ubuntu 12. |
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Mon Nov 21 15:16:12 2022, Tega, Update, CDS, workstation upgrade
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We are currently working on donatella workstation upgrade, which we are calling donatellaclone for now. After installing Debian 11, we install the
cds conda environment. This takes care of most of the requisite
packages except `dataviewer` and `burtgooey`. |
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Thu Sep 29 03:43:20 2011, kiwamu, Update, ASC, wrong channel assignment on IPPOS
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The channels for IPPOS had been assigned in a wrong way.
Because of this, C1:ASC-IP_POS_X_Calc corresponds to the actual vertical motion and C1:ASC-IP_POS_Y_Calc is for the horizontal motion.
We should fix the database file to get the correct vertical/horizontal corrdinate. |
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Tue May 17 19:38:32 2011, kiwamu, Update, SUS, wrong connection on 1X5
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Today Steve was working around the 1X5 rack to strain relief the cable jungles and the jungle is now getting
less jungle.
During the work he disconnected and reconnected some cables. |
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Fri Jan 23 16:33:27 2009, pete, Update, oplevs, x-arm oplev calibrations
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ITMXpit 71 microrad/ct
ITMXyaw 77 microrad/ct
ETMXpit 430 microrad/ct
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Mon Jul 18 17:07:12 2022, yuta, Update, LSC, x4.12 added to ETMX coil outputs to balance with ETMY
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To balance the actuation on ETMX and ETMY, x4.12 was aded to C1:SUS-ETMX_(UL|UR|LR|LL|SD)COIL FM1.
OSEM damping filter gains, oplev loop gains, and alignment offsets were divided by this factor.
C1:LSC-ETMX_GAIN is now 1. |
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Fri Nov 16 03:12:39 2012, Ayaka, Den, Update, Green Locking, xarm locked
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We aligned and locked xarm for green.
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Fri Nov 16 09:57:57 2012, Jenne, Update, Green Locking, xarm locked
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Quote:
We aligned and locked xarm for green. |
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Mon Aug 7 14:02:52 2023, Radhika, Update, AUX, xend AUX fully locking with Moku:Go
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Moku:Go used for full locking of green laser - OLTF to come
Picking up from where
Reuben left off, I used the Moku:Go in multi-instrument mode to replace the signal generator and uPDH
box entirely (Moku:Go setup shown in Attachments 1+2). The lock-in amplifier sourced the modulation for the PZT: 210.5 |
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Mon May 19 22:44:21 2014, den, Update, PEM, xend sei isolation kit is set
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Quote:
Yend seismometer isolation kit (elog 8461) hosts Guralp seismometer. I made a cable |
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Thu Nov 15 21:52:48 2012, Den, Ayaka, Update, Green Locking, yarm locked
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We aligned and locked Y arm for green:
installed camera on PSL to monitor green transmission
aligned green path on the ETMY table to see the beam on the PSL
camera
misaligned ETMY and aligned ITMY to see reflected beam on REFL PD
installed green transmission PD on PSL
aligned |
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Wed Dec 18 03:29:48 2013, Den, Update, LSC, yarm locked on mc
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As a CM slow path test I locked free swinging yarm by actuating on MC length with bandwidth of 200 Hz. Crossover with AO is not stable so far.
I used xarm as an ool frequency noise sensor. MC2 violin mode is at 645 Hz, I have added a notch filter to LSC-MC2 bank. |
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Sat May 17 14:48:06 2014, den, Update, PEM, yend sei isolation kit is set
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Yend seismometer isolation kit (elog 8461) hosts Guralp seismometer. I made a cable for inside
connection, assembled the kit and relocated the instrument from its previous position at the yend inside the kit.
Seismometer is connected to the readout box and running. |
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Mon Jul 7 08:13:41 2014, steve, Update, General, yes,there was firework
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Mon Apr 19 13:23:03 2010, josephb, Configuration, Computers, yum update fixed on control room machines
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I went to Ottavia, and tried running yum update. It was having dependancy issues with mjpegtools, which was a rpmforge provided package.
In order to get it to update, I moved the rpmforge priority above (a lower number) that of epel ( epel -> 20 from 10, rpmforge -> 10 to 20).
This resolved the problem and the updates proceeded (all 434 of them). yum update on Ottavia now reports nothing needs to be done. |
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Thu Mar 5 02:24:19 2009, rana, Configuration, Computers, yum.repos.d
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I added the following repos which I found on allegra to megatron and then did a 'yum install sshfs' on both machines:
allegra:yum.repos.d>l
total 28 |
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Tue May 5 09:22:46 2009, caryn, Update, PEM, zeros
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| For several of the channels on the PEM ADCU, zeros are occuring at the same time. Does anyone know why that might happen or how to fix it? |
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Thu Jun 7 12:49:50 2012, Jamie, Update, Computers, zita network configured
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Added zita to the martian host table, and configured his network accordingly:
zita A 192.168.113.217
https://wiki-40m.ligo.caltech.edu/Martian_Host_Table
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Tue Nov 12 21:50:01 2013, rana, Update, , zita network configured
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I installed 'nfs-client' on zita (the StripTool terminal). It now has mounted all the shared disks, but still can't do StripTool since its
a 32-bit machine and our StripTool is 64. |
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Wed Jun 6 22:25:05 2012, Jamie, Update, Computers, zita now running ubuntu 10.04
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| I'll finish the rest of the config to turn it into a full-fledged workstation tomorrow. |
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Wed Nov 6 17:45:34 2019, gautam, Update, LSC, ~
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Here is a comparison of the response of various DoFs in our various RFPD sensors for two different CARM offsets. Even in the case of the smaller CARM
offset of ~1kHz, we are several linewidths away from the resonance. Need to do some finesse modeling to make any meaningful statement about this - why
is the CARM response in REFL11 apparently smaller for the smaller CARM offset? |