Rana suggested using OSEM sensing voltages as guide lines to look seismic activity.
As you see todays drilling and tumping activity was nothing compared to the EQ of mag 5 and 4
Optic level servos are turned back on.
What Steve means is that there is some drilling going on in the CES shop to accomodate the new water flume group. We want to
make sure that the mirrors don't move enough to break the magnets. On the dataviewer we should look to make sure that the
sensor channels stay between 0-2 V. -Rana
I have increased the temperature setpoint in the office area by ~0.75 deg F. Figure attached. Also a few days ago I increased the setpoint of the AC in the control room. Looks like the Laser is able to handle the changes in office area temperature so far, but lets see how it fares over the weekend.
There were no injuries...Now we need to get some new chairs.
quake coming through. I've re-enabled optic damping (except ETMY), and left off the oplevs for now. We can do a resonant-f check over the weekend.
Looks like it was a magnitude 5 near Olancha, where they sell really good fresh jerky. quake
latest news: there's actually been about a dozen earthquakes in Keeler in the last couple hours: http://earthquake.usgs.gov/eqcenter/recenteqsus/Maps/special/California_Nevada_eqs.php
I spent part of the afternoon cleaning up the area next to the Mode Cleaner where we keep all of our RF stuff: Attenuators, BNC/SMA/LEMO adapters, Mini-Circuits items, and all sorts of other things which are useful while looking at our electronics/RF stuff.
We got another set of "Lyon" drawers, which aided in the organization process....Bob ordered 2, so we now have a 'spare' drawer set if anyone can think of something else to organize (unless this was premeditated for optics or something else?).
As you can see in the picture, (1) it's no longer a total disaster over there, and (2) some of the drawers have sub-divisions to make it faster and easier to find what you're looking for. Please help out by putting things away in their proper place, and adding more labels or dividers to the drawers if there's something else which needs a 'spot'.
I propose that anyone who tries to do this kind of thoroughgoing cleaning should make an e-mail to call everyone available to join just for some hours
because every member has a responsibility to keep the lab organized.
And we have the list of things to do: Electronics (now it is halfway) / Cables / Optics / Screws / Tools ...
I laid down the floor a BNC cable from the Y End table to the BNC Chamber. The cable runs next to the east wall.
I'm leaving the cable because it can turn useful in the future.
I'm tying the end of the cable to a big threaded steel rod on the side of the BS chamber.
I've also labeled as TRY
We have thousands of miles of BNC cables in the lab but we still don't find one when we need it. I decided to solve the problem.
This morning I tried to tidy up the several cable rack the we have in the lab.
i tried to dedicate each rack to a speecific type of cables: special cables, hand made cables, BNCs, LEMOs, etc.
In particular I tryed to concentrate BNC cable of several lengths on the rack near by the ITMX chamber.
People are invited to preserve the organization.
This would be a good trial once you put the label "BNC only" on the wall.
Done! Check it out.
Yesterday Rana and I needed some room on the white board in the Control Room. We had to erase some of the stuff present on the board despite the bif warning "Do Not Erase".
This is how it looked like before erasing.
The smell of diesel is particularly bad this morning. Its concentrated enough to be causing me a headache. I'm heading off to Millikan and will be working remotely on Megatron.
Instead of doing RCG stuff, I went to Millikan to work on data analysis as I couldn't stand the fumes from the construction. (this morning, 8am)
The 40m produces a large amount of paper and cardboard waste. It would be worth it if we disposed those kind of garbages for recycling.
I set up two new garbage bins in the lab: one in the control rooms that adds up to the can/bottle recycling bin, and one other one in the office area, next to the printer for general paper disposal.
People in the lab are strongly invited to make use of the two new garbage bins and recycle their paper and cardboard waste.
Boxes can be larger than the garbage bin, so I'd recommend people to crash them before throwing them into the bin.
Diesel fumes are pumped away from control room AC intakes with the help of newly installed reflector boxes on the CES wall fans.........see # 2272
I made a short stop at the 40m on Sunday night and found that hundreds ants are in the coffee maker.
I removed ants around the sink and washed the coffee maker.
It looked the ants were everywhere in the lab tonight. They seemed to prefer warm places like in the coffee maker and below the coffee mill.
So, I recommend that Steve should confirm there is no ants in the coffee maker again before the first coffee of the week is made.
Othewise they will add some more acidity to your cup.
We still had some ants visiting the sink area this morning. These ants seem to be addicted to our our Peet's coffe
Spectracide: Bug Stop insect killer was sprayed. Please wash your eating dishes well ! and keep area clean.
we hung two new WALL cable racks. One is on the pillar next to the Sp table, the other is next to the PSL computer rack.
To do that we had to drill holes in the wall since the simple screws weren't strong enough to keep them up.
One of the racks, the yellow, is dedicated to 4-pin lemos and other thick cables.
awesome - I have ordered 5 blue racks so that we can hang power cables. The fat BLUE ones are for fat cables and the orange ones for the coax cables.
In the lab there are lots of old posters with outdated autocad drawings, or printouts with schematics of old electronics hanging on the walls.
Can we get rid of those and start giving the lab a fresh and modern look?
Rana noticed that recently the temperature inside the lab has been a little bit too high. That might be causing some 'unease' to the computers with the result of making them crash more often.
For the next hours I'll be paying attention to the temperature inside the lab to make sure that it doesn't go out of control and that the environment gets too cold.
Today the lab is perceptibly cooler.
The temperature around the corner is 73 F.
It has rained continuously for the last 24 hours. Bob walked through the lab looking for possible water infiltrations. The floor looked dry: no puddles or leaks anywhere so far.
There is a planned power outage tomorrow, Saturday from 7am till midnight.
I vented all annulies and switched to ALL OFF configuration. The small region of the RGA is still under vacuum.
The vac-rack: gauges, c1vac1 and UPS turned off.
It turns out that we perfecly timed the big one
In the process of finding the signal of the big chilean earthquake I just realized that we were all off
MC1 and MC3 seem to have kept themselves together, but all the other optics' watchdogs tripped.
Some of the suspensions got watchdog tripped -> enabled -> damped.
The MC mirrors got slightly misaligned.
[Alberto, Koji, Rana]
The RFM network failed today. We had to reboot the frame builder anf restart all the front end following the instructions for the "Nuclear Option".
Burt-restoring to May 1st at 18:07, or April 30 18:07 made c1sosvme crash. We had to reset the front ends again and restore to April 15th at 18:07 in order to make everything work.
Everything seems fine again now.
... not just because we haven't locked the interferometer for quite some time. I mean, it literally stinks. The chiller's chiller is molding. Its' dripping water and there's mold all under it (Jo just confirmed: "yeah, it's mold").
Someone from Caltech maintenance just crossed the door. Hopefully he'll help us fix it.
I'll keep you updated. Stay tuned.
Someone has been moving the big blue recycling bin in front of the laser-chiller-chiller (the air conditioner in the control room). This is unacceptable. The chiller temp was up to 20.76C. No good.
You are free to move the recycling bin around so you can access drawers or the bike-exit-door in the control room, but make sure that it does not block air flow between the chiller-chiller and the chiller.
The attached photo shows the BAD configuration.
We're going to have to reinstate the policy of No food / organic trash *anywhere* in the 40m. Everyone has been pretty good, keeping the food trash to the one can right next to the sink, but that is no longer sufficient, since we've been invaded by an army of ants:
We are going back to the old policy of Take your trash out to the dumpsters outside. I'm sure there are some old wives tales about how exercise after eating helps your digestion, or something like that, so no more laziness allowed!
Katharine, Sharmila, Gopal, Kiwamu, Jenne, Aidan, Steve, and Koji
A guy from the carpenter shop has done the drilling work in the morning.
In the afternoon we wrapped the central part of the interferometer with plastic sheets in order to avoid the dusts from the tile ripping that will happen tomorrow.
I powered down 1Y1 and 1Y2 instrument racks of MC and RF-systems this morning.
Both racks, SP table, clean tools-parts boxes and MC2 area are also covered with plastics.
Bertin Bros. Construction, Inc is working on the floor preparation. Their head man is Robby Bertin, cell 626. 831.2264
remove tiles, clean off tile glue, drill for ribbed steel bars, rough clean- surface for good bounding. paint floor with bounding agent
Tiles and adhesive removed. There were no dust storms created. Solvent paint- removal made the hole IFO -lab smell like the paint shop.
The south door is open with a fan blowing air inside. The north-west door is open through control room to outside to let air rinse the drying
paint-removal. Koji is taking lunch break while test riding our new PSL table legs.
Since the laser is off, Jenne and I rasied the chiller-chiller (small AC in the Control Room) set point temperature to 73 degree F (from 68F) to save people from shivering.
WE programmed the MOPA chiller's AC unit to turn off at 6PM each day and automatically turn on at 7 AM each morning. Its now very quiet in the control room at night.
Next, we'll leave it off during the day and see if it makes Steve go crazy or not.
I changed the setpoint for the HVAC control (next to Steve) from 73F to 72F. This is to handle the temperature increase in the control room with the AC unit there turned off.
We know that the control setpoint is not linear, but I hope that it settles down after several hours. Lets wait until Tuesday evening before making another change.
80 degrees is too uncomfortable in the control room so I turned on the AC. The set point is 74F.
The following is a message from the LIGO 40m Chief Recycling Officer:
Please get up off your (Alignment Stabilization Servo)es and recycle your bottles and cans! There is a recycling bin in the control room. Recent weeks have seen an increase in number of bottles/cans thrown away in the regular garbage. This is not cool.
There were small pieces of glass, remnants of a fluorescent tube, which were lying around on the ETMY end table for a while now. We picked up the larger pieces by hand and used the HEPA filtered vacuum cleaner to pick up the remaining glass and dust on the table.
Sonali, Ishwita, and another anonymous SURF saved the long-lasted water shortage of the 40m
Mess in the lab is increasing. Kiwamu and I had to clean up some stuffs to continue our work.
(i.e. some components were disturbing to open the lid of the tables.)
Basically the tools/equipments/component/cables/digital cameras/lens caps/IR viewers
you have used for the day should be cleaned up at the end of the day.
If one likes to leave a temporary stuff, leave a note to indicate by whom, for what, how long
it will be kept like that, and when one is going to back there with contact info like the cell phone #.