 Thu Feb 11 14:28:50 2016, Steve, Update, Treasure, 091415 declared 
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Beautifully
Done
Chirp |
 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 |
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Mon Mar 25 10:21:05 2019, Jon, Update, Upgrade, c1susaux upgrade plan
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Now that the Acromag upgrade of c1vac is complete, the next system to be upgraded will be c1susaux. We chose c1susaux because it is one
of the highest-priority systems awaiting upgrade, and because Johannes has already partially assembled its Acromag replacement (see photos below).
I've assessed the partially-assembled Acromag chassis and the mostly-set-up host computer and propose we do the following to complete the system. |
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Tue Mar 26 04:25:13 2019, Johannes, Update, Upgrade, c1susaux upgrade plan
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Quote:
Main TODO items
Debug issue with Acromag DC power wiring
Complete
wiring from chassis feedthroughs to Acromag terminals, following this |
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Tue Mar 26 18:35:06 2019, Jon, Update, Upgrade, Modbus IOC is running on c1susaux2
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Thanks to new info from Johannes, I was able to finish setting up the modbus IOC on c1susaux2.
It turns out the 17 Acromags draw ~1.9 A, which is way more than I had expected. Hence the reason I had suspected a short. Adding a second DC
supply in parallel solves the problem. There is no issue with the wiring. |
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Fri Mar 29 11:43:15 2019, Jon, Update, Upgrade, Found c1susaux database bug
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I found the current bias output channels, C1:SUS-<OPTIC>_<DOF>BiasAdj, were all pointed at C1:SUS-<OPTIC>_ULBiasSet for every degree of freedom. This same issue appeared in all eight database files (one per optic),
so it looks like a copy-and-paste error. I fixed them to all reference the correct degree of freedom. |
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Thu May 2 15:35:54 2019, Jon, Omnistructure, Upgrade, c1susaux upgrade documentation
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For future reference:
The updated list of
c1susaux channel wiring (includes the "coil enable" --> "coil test" digital outputs change)
Step-by-step instructions |
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Thu Jun 23 15:05:01 2022, Water Monitor, Update, Upgrade, Water Bottle Refill
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| 22:05:02 UTC Jordan refilled his water bottle at the water dispenser in the control room. |
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Mon Oct 29 09:16:31 2007, steve, Routine, VAC, the rga is back
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We had no filament current since last power glitch of Oct. 8, 2007
First I thought that the filament was lost, but it was only bad contact.
The rga head pins were oxidized. Rga was turned back on last Friday.
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Mon Oct 29 09:46:50 2007, steve, Routine, VAC, vac & pem trend
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Pumpdown 64 pumped by maglev for 125 days
pd64-m-d125
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Wed Oct 31 10:31:23 2007, Andrey Rodionov, Routine, VAC, Venting is in progress
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We (Steve, David, Andrey) started venting the vacuum system at 9.50AM Wednesday morning. |
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Thu Nov 1 09:17:27 2007, steve, Routine, VAC, vent 64
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Yesterday before vent I could not lock MC, therfore I could not measure the
transmitted power at MC2
The vent went well. We had lots of help.
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Mon Nov 5 22:24:38 2007, Andrey, Steve, Omnistructure, VAC, Pumping down goes smoothly
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We (Steve and Andrey) started pumping down at 3.25PM today. At 9 PM we turned off the rotary pump, and turned on turbomolecular pumps.
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Tue Nov 6 09:14:37 2007, steve, Summary, VAC, pump down 65
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8 hr plot,
precondition: 5 days at atm,
vent objective: drag wiping mc1, mc2 & mc3 accomplished,
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Wed Nov 7 09:38:01 2007, steve, Update, VAC, rga scan
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| pd65-m-d2 at cc1 6e-6 torr |
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Wed Nov 28 08:47:29 2007, steve, Omnistructure, VAC, rga is out of order
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The rga is not working since Nov 10
The controller is broken.
pd65-m-d23 |
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Thu Nov 29 11:10:54 2007, rob, Omnistructure, VAC, RGAlogger sleeping
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Without the RGA controller responding, the RGAlogger script just hangs. Rather than fix it, I just put it to sleep by commenting out the line in op440m
crontab file. Once we get it running again, we'll move the cronjob to op340m. |
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Tue Feb 12 13:53:27 2008, rob, Omnistructure, VAC, Return of the RGA
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The new RGA head was installed a few days ago. I just ran the [B]RGAlogger[/B] script to see if it works, which it does. I also edited the crontab file
on op340m to run the RGAlogger script every night at 1:25 AM. It should run tonight. |
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Tue Feb 19 10:14:13 2008, steve, Update, VAC, rga logging needs help
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| The rga head and controller are running fine, but the data logging is not. |
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Thu Feb 28 13:04:59 2008, rob, Update, VAC, rga logging working again
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[quote]The rga head and controller are running fine, but the data logging is not.[/quote]
It should run tonight at 1:25 AM. To get the cron job to work properly on op340m, I had to make wrapper sh script which defines the perl library before |
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Mon Mar 3 09:25:33 2008, steve, Update, VAC, rga scan logging is working now
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[quote][quote]The rga head and controller are running fine, but the data logging is not.[/quote]
It should run tonight at 1:25 AM. To get the cron job to work properly on op340m, I had to make wrapper sh script which defines the perl library before |
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Thu Mar 20 15:28:20 2008, steve, Update, VAC, tp2 's drypump replaced
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| The fore pump of tp2 was replaced at fore line pressure 998m Torr |
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Fri Mar 21 09:02:03 2008, steve, Update, VAC, tp 2 failed
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Small turbo #2 is the forepump of the maglev.
It failed last night, shut down the maglev and interlock closed V1
Ifo pressure is 20 mTorr now. The Yarm was still locked at 8am this morning.
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Fri Mar 21 11:54:38 2008, rob, Update, VAC, tp 2 failed
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[quote]Small turbo #2 is the forepump of the maglev.
It failed last night, shut down the maglev and interlock closed V1
Ifo pressure is 20 mTorr now. The Yarm was still locked at 8am this morning.
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Thu Apr 17 15:00:59 2008, steve, Update, VAC, vac controller computer to be replaced
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Now that Rosalba is up and running someone should step forward to volunteer for this job.
Old desk top at the Vacuum Rack should be replaced by a functional less old computer so
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