ID |
Date |
Author |
Type |
Category |
Subject |
51
|
Thu Nov 1 19:53:34 2007 |
Andrey Rodionov | Bureaucracy | Photos | Robert's photo |
|
52
|
Thu Nov 1 19:54:22 2007 |
Andrey Rodionov | Bureaucracy | Photos | Rana's photo |
|
53
|
Thu Nov 1 19:55:03 2007 |
Andrey Rodionov | Bureaucracy | Photos | Andrey's photo |
|
54
|
Thu Nov 1 19:55:59 2007 |
Andrey Rodionov | Bureaucracy | Photos | Andrey, Tobin, Robert - photo |
|
55
|
Thu Nov 1 19:58:07 2007 |
Andrey Rodionov | Bureaucracy | Photos | Steve and Tobin's picture |
|
57
|
Fri Nov 2 08:59:30 2007 |
steve | Bureaucracy | SAFETY | the laser is ON |
The psl laser is back on ! |
75
|
Wed Nov 7 02:14:08 2007 |
Andrey | Bureaucracy | IOO | More information about MC2 ringdown |
As Tobin wrote two hours ago, we (Andrey, Tobin, Robert) made a series of ringdown measurements for MC2
in the spirit of the measurement described by Rana -> see
entry from Mon Oct 29 23:47:29 2007, rana, Other, IOO, MC Ringdowns.
I attach here some pictures that we saw on the screen of the scope, but I need to admit that I am not experienced enough to present a nice fit to these data, although I attach fits that I am able to do today.
I definitely learned a lot of new Matlab functions from Tobin - thanks to him!, but I need to learn two more things:
Firstly, I do not know how to delete "flat" region (regions before the ringdown starts) in Matlab ->
I needed to delete the entries for times before the ringdown ("negative times") by hand in the text-file, which is extremely non-elegant method;
Secondly, I tried to approximate the ringdown curve by a function ydata=a*exp(b*xdata) but I am not exactly sure if this equation of the fitting curve is a good fit or if a better equation can be used.
It seems, in this situation it is better for me to ask more experienced "comrades" on November 7th.
P.S. It seems I really like the type of message "Bureaucracy" - I put it for every message. As Alain noted, maybe that is because some things are very bureacratized in the former USSR / Russia. By the way, when I was young, November 7th was one of two most important holidays in the USSR - I liked that holiday because I really liked military parades on the red square. I attach a couple of pictures. November 7 is the anniversary of the Revolution of 1917. |
113
|
Fri Nov 16 18:46:49 2007 |
steve | Bureaucracy | PSL | MOPA was turned off & on |
The "Mohana" boys scouts and their parents visited the 40m lab today.
The laser was turned off for their safety.
It is back on ! |
115
|
Mon Nov 19 14:32:10 2007 |
steve | Bureaucracy | SAFETY | grad student safety training |
John Miller and Alberto Stochino has received the 40m safety bible.
They still have to read the laser operation manual and sign off on it. |
130
|
Wed Nov 28 12:43:53 2007 |
Andrey | Bureaucracy | | Here was the PDF-file of my presentation |
I was making a report with powerpoint presentation during that Wednesday's 40-m meeting.
Here was the pdf-file, but LATER IN THE EVENING I CREATED A WIKI-40M-page describing the algorithm, and now the pdf-file is ON THAT WIKI-40M PAGE.
NOTE ADDED AFTER THE PRESENTATION: I double checked, I am indeed taking the root-mean-square of a difference, as we discussed during my talk.
My slide #17 "Calculation of differential length" was wrong, but now I corrected it. |
135
|
Wed Nov 28 19:02:41 2007 |
Andrey | Bureaucracy | WIKI-40M Update | New WIKI-40M page describing Matlab Suspension Modeling |
I created the WIKI-40m page with some details about my today's talk on the 40-m lab meeting.
The address is:
http://lhocds.ligo-wa.caltech.edu:8000/40m/Modeling_of_suspensions
(or you can go to the main page, http://lhocds.ligo-wa.caltech.edu:8000/40m/ , and click on the link "Modeling of suspensions").
The WIKI-40m page describes my transfer functions and contains the pdf-file of my presentation. |
224
|
Thu Jan 3 12:38:49 2008 |
rob | Bureaucracy | TMI | Sore throat |
Quote: |
I did not feel anything wrong yesterday, but unfortunately I have a very much sore throat today. I need to drink warm milk with honey and rinse my throat often today. So far I do not have other illness symptomes (no fever), so I hope that this small disease will not last for a long time, but I feel that it is better for me to cure my sore throat today at home (and probably it is safer for others in 40-m).
I took yesterday the book "Digital Signal Processing", so I have it for reading at home.
Hope to see you tomorrow. |
I've added a new category--TMI--for entries along these lines. |
262
|
Thu Jan 24 22:52:18 2008 |
Andrey | Bureaucracy | General | Ants around a dirty glass (David - please read!) |
Dear coleagues,
there are rains outside these days, so ants tend to go inside our premises.
David was drinking some beverage from a glass earlier today (at 2PM) and left a dirty glass near the computer.
There are dozens, if not hundreds, of ants inside of that glass now.
Of course, I am washing this glass.
A. |
279
|
Mon Jan 28 12:42:48 2008 |
Dmass | Bureaucracy | TMI | Coffee |
There is tea in the coffee carafe @ the 40m. It is sitting as though it were fresh coffee. There is also nothing on the post it. |
339
|
Fri Feb 22 21:19:38 2008 |
Andrey | Bureaucracy | Computer Scripts / Programs | MDV library does not work at "LINUX 2" |
While working on Thursday evening with Matlab scripts "dttfft2" and "get_data", I noticed that mDV library does not work at computer "LINUX 2" (the third computer in the control-room if you enter it from the restroom). There are multiple error messages if we try to run "hello_world", "dttfft2" or "get_data". In order to take data from accelerometers, I changed the computer - I was working from "LINUX 3" computer, the most right computer in the control room, but for the future someone should resolve the issue at "LINUX 2". I am not experienced enough to revive the correct work of mDV directory at "LINUX 2".
Andrey. |
343
|
Thu Feb 28 12:31:33 2008 |
rob | Bureaucracy | Computer Scripts / Programs | MDV library does not work at "LINUX 2" |
Quote: |
While working on Thursday evening with Matlab scripts "dttfft2" and "get_data", I noticed that mDV library does not work at computer "LINUX 2" (the third computer in the control-room if you enter it from the restroom). There are multiple error messages if we try to run "hello_world", "dttfft2" or "get_data". In order to take data from accelerometers, I changed the computer - I was working from "LINUX 3" computer, the most right computer in the control room, but for the future someone should resolve the issue at "LINUX 2". I am not experienced enough to revive the correct work of mDV directory at "LINUX 2".
Andrey. |
This turned out to be due to /frames not being mounted on linux2, as a result of a reboot. The issue is discussed in entry 270. I remounted the /frames, and added a line to mdv_config.m to check whether the frames are mounted. |
382
|
Fri Mar 14 16:56:03 2008 |
Dmass | Bureaucracy | Computers | New 40m control machine. |
I priced out a new control machine from Dell and had Steve buy it.
GigE cards (jumbo packet capable) will be coming seperately.
Specs:
Quad core (2+GHz)
4 Gigs @ 800MHz RAM
24" LCD
low end video card (Nvidia 8300 - analog + digital output for dual head config)
No floppy drive on this one (yet?) |
488
|
Tue May 20 09:28:42 2008 |
steve | Bureaucracy | SAFETY | safety traning for 40m |
Tara Chalernsongsak, new gradstudent for K. Libbrecht was introduced to the basics of the 40m operations. |
491
|
Thu May 22 11:21:45 2008 |
steve | Bureaucracy | SAFETY | early surf sudent |
Caltech under grad Eric Mintun received the 40m safety training.
Now he has to read and sign SOP of laser and ifo.
He'll be working with GigE cameras with Joe |
505
|
Thu May 29 16:49:49 2008 |
steve | Bureaucracy | Photos | Yoichi has arrived |
Yoichi had his first 40m meeting. We welcomed him and Tobin, who is visiting, by sugar napoleons that
Bob made. |
511
|
Mon Jun 2 12:20:35 2008 |
josephb | Bureaucracy | Cameras | Beam scan has moved |
The beamscan has been moved from the Rana lab back over to the 40m, to be used to calibrate the Prosilica cameras. |
523
|
Fri Jun 6 15:56:00 2008 |
steve | Bureaucracy | SAFETY | Yoichi received safety training |
Yoichi Aso received 40m specific safety training. |
552
|
Mon Jun 23 15:22:04 2008 |
rana | Bureaucracy | SAFETY | Laser Safety Walkthrough today |
|
708
|
Mon Jul 21 15:52:22 2008 |
steve | Bureaucracy | SAFETY | fire alarms test |
The fire alarm test and evacuation drill was successfully completed at 13:45 Wednesday, July 16, 2008
Everybody was on time for the 40m meeting. |
840
|
Fri Aug 15 14:12:31 2008 |
steve | Bureaucracy | SAFETY | safety glasses required |
The MOPA shutter is opened,
the PSL enclosure is switched to bypass mode,
manual block removed from PMC,
the PSL output is still blocked and the mechanical shutter is still closed.
Pumpdown is at 300 Torr continuing
Laser safety glasses are required! |
942
|
Thu Sep 11 14:27:53 2008 |
steve | Bureaucracy | SAFETY | safety training |
Peter Kalmus received 40m specific safety training last week. |
1068
|
Wed Oct 22 16:22:53 2008 |
steve | Bureaucracy | SAFETY | Caryn received safety training |
Caryn Polatchi has received 40m safety training on Monday, Oct 20 |
1071
|
Thu Oct 23 11:26:25 2008 |
steve | Bureaucracy | VAC | optosigma forks for vacuum |
Nine short forks from OptoSigma were cleaned, baked and measured by Bob T.
They passed the LIGO vac compatiblity test as Rana predicted.
Remember: Thorlab and Newfocus forks failed this qualification process. |
1123
|
Fri Nov 7 16:05:55 2008 |
steve | Bureaucracy | SAFETY | insect killer sprayed at kitchen area ! |
Bob and I cleaned out the sink area and sprayed
Spectracide's BUG STOP insect killer solution on the shelfs and sink
table top area.
NO eating or coffee drinking till Monday
This is an effort to stop the ants coming. |
1227
|
Wed Jan 14 10:59:06 2009 |
steve | Bureaucracy | VAC | rga waiting to be "connected" |
We have no RGA data since old Dycor passed away in the middle of Oct, 2008
New SRS-RGA200 was installed on the vac envelope on Nov 14, 2008
It is waiting to be software connected to the 40m logging |
1243
|
Thu Jan 22 08:34:10 2009 |
steve | Bureaucracy | SAFETY | safety training |
Kakeru received 40m safety training yesterday.
He has no authorization to work alone in the high power beam path yet. |
1273
|
Thu Feb 5 09:12:29 2009 |
steve | Bureaucracy | SAFETY | safety updates & fire alarm test |
The fire alarm test was completed at 13:30 yesterday.
I updated the 40M Emergency Calling List by replacing Rob by Yoichy. The calling order: Vass, Aso and Taylor.
Rana and Yoichy were added to the "Registered PSL Operator List" and posted it in the lab. (not in the document, that should be up dated)
We are getting ready for the annual safety audit. It will be held next week at 14:00 Friday, Feb 13, 2009
Please participate in the preparation by correcting it or just tell me.
Rod Luna is organizing the pick up of the following old equipment:
HP laser jet 5000n, 3 of 19" 10 base-T network ports and 4 small hubs,
2 Sun monitors, 1 Viewsonic monitor, 7 keypads and
Hitachi scopes 2 of V-355, 2 of V-422, 1 of V-202 and 1 of V-6165
|
1288
|
Tue Feb 10 10:48:48 2009 |
steve | Bureaucracy | SAFETY | safety glasses scanned |
All 40m safety glasses are absorbent.
They were scanned by 180 mW 2mm spot size of 1064 nm beam and their transmissions were measured
They showed no degradation.
UVEX 's LOTG-YAG/CO2 glasses (fits over personal glasses) 11 pieces,
Glendale-XC by Bacou-Dalloz, #1166218VLT68% , aerodynamic style, 7 pieces, (4 missing )
KG5- glasses , heavier- made out of glass, 3 pieces,
Thorlab's LG10, 1 piece
Old glasses by "Laser Glass" Nd-YAG, 2 pieces
Totaling 24
Atm.2 showing our muilty wavelength glasses of 1064 and 530 nm
Their transmittance for both wavelength were zero.
Note: if you have prescripton safety glasses I would like to scan it for you !
|
1319
|
Wed Feb 18 15:31:38 2009 |
steve | Bureaucracy | SAFETY | emergency back-up lights checked |
All 13 exit and emergency back-up lights and their batteries were checked.
Two of the batteries were replaced. |
1332
|
Mon Feb 23 11:07:01 2009 |
steve | Bureaucracy | SAFETY | Kiwamu receives safety training |
Osamu and Kiwamu received 40m safety training on Thursday, Feb 19, 2009
Kiwamu needs Osamu's close supervision at PSL enclosure and AP table
I hope they already read, understood and signed the laser SOP |
1700
|
Wed Jun 24 17:08:16 2009 |
steve | Bureaucracy | SAFETY | surf student safety |
The 40m lab specific safety training is done. The participants were
Stephanie Erickson, Clara Bennett, Chris Zimmerman, Zach Commings, Michelle Stephen surfs and Drew Cappel postock.
They have already went through the Caltech Safety Office laser and general safety training.
They still have to read, understand and sign the the SOP for the laser & lab |
1802
|
Wed Jul 29 11:15:06 2009 |
steve | Bureaucracy | SAFETY | Kevin receives safety training |
Kevin Vigue, our high school summer student went through the 40m specific safety traning yesterday. |
1980
|
Wed Sep 9 10:13:31 2009 |
steve | Bureaucracy | General | the use of FAX machine, scanner & toaster |
You said that the use of FAXST was forbidden for phds and graduate students. I had to swear on the promise of not ever buying an other FAXST |
2482
|
Wed Jan 6 16:48:52 2010 |
steve | Bureaucracy | SAFETY | copied NPRO key |
We lost our key to the Lightwave 125/6-OPN-PS The key shop just made one look a like that works. |
2647
|
Mon Mar 1 08:49:37 2010 |
steve | Bureaucracy | SAFETY | safety audit |
The 40m safety audit will be at Wednesday afternoon, March 3
Please participate getting our lab to inspection grade safety level. |
2815
|
Tue Apr 20 10:55:10 2010 |
steve | Bureaucracy | SAFETY | Kevin Kuns received safety training |
The 40m's new undergrad Kevin Kuns was introduced to 40m safety hazards. He is new and needs guidance as specially with 2W laser work.
Peter King will train him on Friday to LIGO-laser standard.
|
3225
|
Wed Jul 14 20:15:04 2010 |
Dmass | Bureaucracy | Cameras | IR Olympus |
I borrowed the Olympus and forgot to leave a note - I should have it for at most a day. dmassey@ligo if you need it urgently |
3588
|
Mon Sep 20 10:33:21 2010 |
josephb | Bureaucracy | Computers | Larry stopped by - GC machine had conflicting IP |
Larry stopped by today and had to disconnect the m25 machine (this is the 1st GC machine on the left as you walk into the control room) because its IP was conflicting with a machine over in Downs. Do not use 131.215.115.125 as the IP on this machine as this is already assigned to someone else. They couldn't figure out the root password to change it which is why it is not currently plugged into the network, and is not to be until an appropriate IP is assigned.
They've asked that whoever set the machine up to please contact them (extension 2974). |
3637
|
Fri Oct 1 16:46:20 2010 |
steve | Bureaucracy | SAFETY | Yuta received 40m-101-safety training |
Our visiting graduate student Yuta Michimura received 40m specific basic safety training today. |
3664
|
Thu Oct 7 08:39:39 2010 |
steve | Bureaucracy | SAFETY | Joonho receives safety training |
Our new undergrad Joonho Lee received 40m specific basic safety training yesterday.
Yuta and Joonho are scheduled to participate in the LIGO-laser safety tutelage with Peter K on Oct 12 |
3697
|
Tue Oct 12 15:51:18 2010 |
yuta | Bureaucracy | SAFETY | the 40m squad received safety training from Peter |
Yuta, Joonho, and Suresh received the Basic Laser Safety Training from Peter King today.
Now, we got homework. |
3833
|
Mon Nov 1 10:28:41 2010 |
steve | Bureaucracy | SAFETY | Suresh received 40m safety training |
Our new postdoc Suresh Doravari received 40m specific safety training last week. |
3894
|
Thu Nov 11 11:08:26 2010 |
steve | Bureaucracy | PEM | AP table found open |
Please remember to cover the optical tables ! |
4563
|
Mon Apr 25 11:23:41 2011 |
Alastair | Bureaucracy | Computers | wiki? |
40m wiki seems to have been down for quite a while now but I can't see any info in the elog about it. Is there some ongoing problem?

|
4564
|
Mon Apr 25 11:58:37 2011 |
Jamie | Bureaucracy | Computers | wiki? |
Quote: |
40m wiki seems to have been down for quite a while now but I can't see any info in the elog about it. Is there some ongoing problem?
|
There was an email from Dave Barker about this. They had to reorganize the DNS at LHO. The URL that should be used is: http://blue.ligo-wa.caltech.edu:8000/40m |