 Fri Mar 25 08:58:38 2011, Aidan, Update, Treasure, Cleared stuff off SP table 
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I tidied up some of the stuff that was on the SP table. The ISS box that has been sitting on there for months is now underneath the X-arm on top of the
spare Marconi which is stored there.
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Wed May 11 22:54:53 2011, Jenne, Update, Treasure, ETMY trans QPD installed
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I put the ETMY trans QPD in.
The ETMY trans beam was already going toward the TRY DC PD, and a CCD camera. I put a beam splitter in that beam (reducing the power to TRY
and the CCD by 50%), and sent my picked-off beam to the ETMY QPD. Since there is a lens in this path to focus the beam onto TRY and the camera, I |
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Fri Aug 5 20:44:26 2011, jamie, Metaphysics, Treasure, Film crew here Monday morning
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Just a reminder that a film crew will be here Monday morning, filming Christian Ott for some Discovery channel show.
They are slated to be here from 8am to 12:30pm or so. They will take a couple of shots inside the lab, and the rest of the filming
should be of Christian in the control room (which they will "clean up" and fit with "sexy lighting"). I will try to be here the |
 Fri Aug 5 22:54:29 2011, kiwamu, Metaphysics, Treasure, Crane crew here Monday morning
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Also, according to Steve, there will be some crane guys for fixing the Y end crane issue (#5124) Monday morning.
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Mon Aug 8 13:24:00 2011, steve, Metaphysics, Treasure, Monday morning
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Quote:
Just a reminder that a film crew will be here Monday morning, filming Christian Ott for some Discovery channel show. |
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Wed Aug 17 17:51:54 2011, Jenne, Update, Treasure, Prepared for drag wiping
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While waiting for the IFO team to align things (there were already ~5 people working on a ~1 person job...), I got all of our supplies prepped for drag
wiping in the morning.
The syringes are still on the flow bench down the Xarm. I put fresh alcohol from unopened spectrometer-grade bottles into our alcohol drag |
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Thu Aug 18 10:59:04 2011, steve, Update, Treasure, Prepared for drag wiping
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Quote:
While waiting for the IFO team to align things (there were already ~5 people working on a ~1 person job...), I got all of our supplies prepped |
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Tue Aug 23 01:05:40 2011, Jenne, Update, Treasure, All Hands on Deck, 9am!
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We will begin drag wiping and putting on doors at 9am tomorrow (Tuesday).
We need to get started on time so that we can finish at least the 4 test masses before lunch (if possible).
We will have a ~2 hour break for LIGOX + Valera's talk. |
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Wed Nov 16 21:01:08 2011, Jenne, Update, Treasure, eom box
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I made a super sweet new foam box for our EOM. It's awesome, and should be reasonably easy to duplicate. Check out the PHOTOS!
Notes:
* I didn't think I was going to cover the inside of the box at first, since the foam is non-fuzz-generating, but Koji suggested it would be a good |
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Thu Feb 21 13:34:35 2013, Jenne, Update, Treasure, IR card removed
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Quote:
The sensor card on the bottom of the chamber was not salvaged yet.
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Tue May 7 19:58:28 2013, rana, Frogs, Treasure, rabbitt whole
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controls@rosalba:/opt/rtcds/caltech/c1/medm/c1ioo/master/master/master
0$ ls
C1IOO_LKIN_OUT_MTRX.adl C1IOO_MC_ASS_LOCKIN5.adl C1IOO_WFS1_I.adl |
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Mon Aug 19 10:16:15 2013, Picasso, Metaphysics, Treasure, outsider art
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Wed Sep 25 17:07:08 2013, rana, Frogs, Treasure, Free Green Mango Juice in fridge
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its an acquired taste, but its a must since we're sending an interferometer to India |
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Tue Dec 10 17:27:47 2013, Jenne, Update, Treasure, Baby oplev LQR designed loop
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I *finally* figured out how to bend Matlab to my will, and close a very simple oplev loop using LQR technology.
This is super, super simple, but it's a step in the right direction. There is no noise, just a simple pendulum with a resonant frequency
of 0.75Hz, and a Q of 10. The LQR tries to keep the position of the pendulum at a minimum, and does not care at all about the velocity. You |
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Sun Dec 15 20:37:41 2013, rana, Summary, Treasure, There is a Wagonga in the container that Steve does not believe in
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| From Linda and Bram: |
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Wed Sep 10 02:35:54 2014, Jenne, HowTo, Treasure, Secret scripts, revealed!
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I hereby confess to having a secret script. But it is secret no longer!
It's a "goLock" script, and it is now in the path from any terminal. It kills any open medm sessions (to clean up desktops), and
then opens a palette of screens that I find useful. It also starts up the CARM and DARM ALS watch scripts, and the toggle shutter scripts. It |
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Wed Jan 14 02:11:07 2015, rana, Summary, Treasure, 2-loop Algebra Loopology
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I show here the matrix formalism to calculate analytically the loop TF relationships for the IMC w/ both FSS actuators so
that it would be easier to interperet the results.
The attached PDF shows the Mathematica notebook and the associated block diagram.
In the notebook, I have written the single hop connection gains into the K matrix. P is the optical plant, C is the Common electronic gain, F |
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Tue Jan 27 17:58:21 2015, Jenne, Configuration, Treasure, Welcome, Donatella!
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| Welcome to your new abode, Donatella! |
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Fri Jan 30 11:37:20 2015, manasa, Frogs, Treasure, SP table madness ends
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SP table has been a mess because Q and I had let our SURF leave without cleaning up.
I cleaned up the SP table, put things back where they belong and did some sorting. I will put back the optomechanics where they belong sometime
later. |
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Mon Feb 16 21:52:51 2015, rana, HowTo, Treasure, big Dataviewer windows
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Following this entry, I have made the same change in the controls account
on rossa:
In the ~/.grace/gracerc file (create one if it doesn't exist), put in a line which reads: |
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Wed Mar 4 00:50:36 2015, rana, Bureaucracy, Treasure, Transitioned DARM to AS55Q, some other work
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Just in case there was some confusion, the champagne on my desk is not to be opened
before I get back, no matter how many signals are transitioned to RF. |
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Mon Mar 9 16:50:35 2015, Champagne Duck, Frogs, Treasure, Celebrating Lock
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Mon Jun 22 14:21:42 2015, Steve, Metaphysics, Treasure, Jenne and Den graduated
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| Last supper before departing at "Grazie" El Portal. All the best on your journey! |
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Thu Feb 11 14:28:50 2016, Steve, Update, Treasure, 091415 declared
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Beautifully
Done
Chirp |
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Wed Feb 24 09:06:25 2016, Steve, Update, Treasure, the way it happened
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Celebration
Quote:
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Fri Oct 14 15:47:00 2016, rana, Update, Treasure, filters + clip
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I say just fix the clipping. Don't worry about the PRM OSEM filters. We can do that next time when we put in the ITM baffles. No need for them on
this round. |
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Fri Jan 6 17:00:26 2017, rana, Frogs, Treasure, Video of Lab Tour
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In this video: https://youtu.be/iphcyNWFD10, the comments focus on the orange crocs, my wrinkled shirt,
and the first aid kit. |
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Wed Mar 29 16:38:00 2017, Steve, Omnistructure, Treasure, sus fiber illluminated
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Thu Mar 30 10:41:56 2017, rana, Omnistructure, Treasure, sus fiber illluminated
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| Very, very cool! |
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Fri Mar 31 16:10:33 2017, Steve, Update, Treasure, Les Guthman
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Les Guthman interviews gradstudent Graig.
Main laser emergency shut off was acuated by accident during this fiming. The laser is turned on. |
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Tue Jul 25 00:03:01 2017, rana, Omnistructure, Treasure, coffee pot lid
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I have recommissioned the Zojirushi coffee pot lid. You may, once again, align the dots in order to make the carafe
pourable.
Details:
The Zojirushi lid is a two part mechanism: |
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Thu Aug 2 16:30:08 2018, Steve, Update, Treasure, time capsule location
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I 've just found this time capsule note from Nov. 26, 2000 by Kip Thorne: LIGO will discover gravitational waves by Dec.31, 2007
Quote:
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Fri Nov 2 09:47:57 2018, Steve, Metaphysics, Treasure, Zojirushi is dead
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| It took at least ten years to rust away. |
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Mon Nov 5 15:55:39 2018, Steve, Metaphysics, Treasure, Zojirushi is dead
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We have no coffee machine.
We are dreaming about it
We still do not have it. |
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Tue Nov 6 09:45:32 2018, aaron, Metaphysics, Treasure, Zojirushi is dead
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| New all organic machine. |
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Sun Oct 31 14:21:31 2021, rana, HowTo, Treasure, IFOCad
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IFOcad model/video of the AEI 10m interferometer:
https://10m.aei.mpg.de/design-and-sensitivity/ |
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Tue Mar 15 13:49:44 2022, Ian MacMillan, Bureaucracy, Treasure, New Screwdriver Bits
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I have received the new screwdriver bits that will work with the two electric screwdrivers we have. I have distributed them in the 40m. Some are in the
electronics stations and some are in the toolbox in the lab. The new electric screwdriver (which looks like a drill but takes typical screwdriver bits)
is in the room with the workshop. It is in the blue Makita box. For some reason, lots of the old bits were rounded because of incorrect use. I have thrown |
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Wed Sep 14 15:40:51 2022, JC, Update, Treasure, Plastic Containers
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There are brand new empty plastic containers located inside the shed that is outside in the cage. These can be used for organizing new equipment
for CDS, or cleanup after Wednesday meetings |
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Fri Aug 10 11:29:39 2018, aaron, Configuration, Upgrade, Parts list for BHD
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I've started putting together a list of things we'll need to buy to do BHD readout. I'm still messing around with more detailed optics layouts,
but wanted to get a list started here so people can let me know if I'm missing any big, obvious categories of goods.
My current plan makes minimal changes to the signal path going to the OMC, and tries to just get the LO beam into the OMC with minimal optics. |
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Fri Aug 10 16:43:50 2018, gautam, Configuration, Upgrade, Parts list for BHD
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Can we use the leakage beam from MMT2 on the OMC table as the LO beam? I can't find the
spec for this optic, but the leakage beam was clearly visible on an IR card even with the IMC locked with 100 mW input power so presumably there's
enough light there, and this is a cavity transmission beam which presumably has some HOM content filtered out. |
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Sun Aug 12 10:59:34 2018, aaron, Configuration, Upgrade, Parts list for BHD
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That seems fine, I wasn't thinking of that beam. in that case could we just have a PBS directly behind MMT2 and send both beams to the same OMMT?
Alternatively we can move OM5 and the beam path OMPO-OMMTSM towards -y, then put the LO-OMMT parallel to the existing OMMT but displaced in +x...
we'd have to move the existing OMC and BHD towards +x as well. |
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Mon Aug 13 17:20:07 2018, aaron, Configuration, Upgrade, Parts list for BHD
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I've attached the diagram of what I mean.
There are a couple caveats and changes that would have to be made that are not included in this diagram, because they would be made on different
tables. |
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Tue Nov 20 17:38:13 2018, rana, Update, Upgrade, New Coffee Machine
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Rana, Aaron, Gautam
The old Zojirushi has died. We have received
and comissioned our new Technivoorm Mocha Master today. It is good. |
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Sun Dec 2 16:08:44 2018, Jon, Omnistructure, Upgrade, Feedthroughs for Vacuum Acromag Chassis
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Below is an inventory of the signal feedthroughs that need to be installed on the vacuum Acromag crate this week.
Type
Qty
Connects to
# Chs
Signals
DB-37 female
1
Main |
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Tue Dec 4 10:38:12 2018, Jon, Omnistructure, Upgrade, Updated Feedthrough List for Vacuum Acromag Chassis
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Based on new input from Chub, attached is the revised list of signal cable feedthroughs needed on the vacuum system Acromag crate. I believe this
list is now complete. |
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Wed Dec 12 18:27:07 2018, Jon, Omnistructure, Upgrade, Analog signals, A/D Acromag added to vacuum system
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There turned out to be a few analog signals for the vacuum system after all. The TP2/3 foreline pressure gauges were never part of the digital system,
but we wanted to add them, as some of the interlock conditions should be predicated on their readings. Each gauge connects to an old Granville-Phillips
375 controller which only has an analog output. Interfacing these signals with the new system required installing an Acromag XT1221 8-channel |
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Thu Dec 20 21:29:41 2018, Jon, Omnistructure, Upgrade, Vacuum Controls Switchover Completed
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[Jon, Chub, Koji, Gautam]
Summary
Today we carried out the first pumpdown with the new vacuum controls system in place. It performed well. The only problem encountered
was with software interlocks spuriously closing valves as the Pirani gauges crossed 1E-4 torr. At that point their readback changes from a number to "L |
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Fri Jan 4 11:06:16 2019, Jon, Omnistructure, Upgrade, Vac System Punchlist
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The base Acromag vacuum system is running and performing nicely. Here is a list of remaining questions and to-do items we still need to address.
Safety Issues
Interlock for HV supplies. The vac system hosts a binary
EPICS channel that is the interlock signal for the in-vacuum HV supplies. The channel value is OFF when the main volume pressure is in the |
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Tue Jan 8 19:13:39 2019, Jon, Update, Upgrade, Ready for pumpdown tomorrow
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Everything is set for a second pumpdown tomorrow. We'll plan to start pumping after the 1pm meeting. Since the main volume is already at 12
torr, the roughing phase won't take nearly as long this time.
I've added new channels for the TP1 analog readings (current and speed) and for the two N2 tank pressure readings. Chub finished installing |
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Thu Mar 21 18:36:59 2019, Jon, Omnistructure, Upgrade, Vacuum Controls Switchover Completed
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Updated vac channel list is attached. There are several new ADC channels.
Quote:
Hardware & Channel Assignments |