 Thu Sep 9 12:02:03 2010, Alberto, Update, Electronics, Frequency Generation Box - Amplitude Noise Measurements 
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I measured the amplitude noise of the source outputs and the EOM outputs of the Frequency Generation box.
the setup I used is shown in this diagram:
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Thu Sep 9 11:31:54 2010, steve, Update, PEM, accelerometer cable connection
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I turned off/on the power to the accelerometers in order to re rout their connections. I found cable connector body-nut #3 loose to Accelerometer
2X This connector should be checked for solid performance. |
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Thu Sep 9 05:58:04 2010, kiwamu, Update, PSL, mode matching from PMC to IMC
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I started mode matching of the beam going to IMC. The work is still going on.
According to Rana's calculation (see here), I put the first lens (f=200mm) in between
two steering mirrors after PMC. |
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Wed Sep 8 16:17:58 2010, steve, Update, PEM, particle counter problem
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I played with the particle counter this morning. Now it's running and reading the correct numbers on the old COCHECKLIST.adl medm screen.
However, it can not be seen with dataviewer.
Koji just rebooted the frame builder and the problem was solved. |
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Wed Sep 8 14:44:37 2010, josephb, Update, CDS, Updated parse_mdl_to_ipc.py and feCodeGen.pl
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I updated parse_mdl_to_ipc.py to correctly work with the 3 new cdsIPCx parts, namely cdsIPCx_PCIE (for dolphin connections), cdsIPCx_RFM (for our traditional
reflected memory connections), and cdsIPCx_SHMEM (local shared memory on the computer). These parts replaced cdsIPCx awhile back (see here
). |
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Wed Sep 8 11:56:24 2010, kiwamu, Summary, CDS, September CDS test plan
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Joe and Kiwamu
We discussed about our CDS plan for this September. The summary of the plan and "to do list" are now on the wiki page;
http://lhocds.ligo-wa.caltech.edu:8000/40m/Upgrade_09/CDS/September_CDS_plan |
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Wed Sep 8 00:01:07 2010, rana, valera, Update, PSL, PMC update
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We ran the cables for the PMC: The RF cable for the 35.5 MHz drive was cheap and so we swapped the 29.5 MHz cable for it.
There now remain 1 RG-174 cable to drive the FSS PC (21.5 MHz) and 3 Heliax for the Kiwamu Tri-Mod EOM (11, 29.5, and 55 MHz).
We also changed the BLACK HV drive cable for the RED one (previously used for the MZ). All HV cables MUST be RED. |
 Wed Sep 8 09:50:13 2010, rana, Update, PSL, PSL update
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Also, Kiwamu has modified the layout drawing to add the green PLL stuff. This has collapsed the reference cavity's wave function placing it close to
its original position.
WE (maybe Valera and Steve) can now put the reference cavity back on the table. |
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Wed Sep 8 11:46:53 2010, kiwamu, Update, PSL, update of the layout
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I put some green stuff on the layout drawing.
I continue to refine the positions of these stuff.
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Tue Sep 7 23:49:08 2010, sanjit, Configuration, Computers, aldabella network configuration
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added name server 192.169.113.20 as the first entry in /etc/resolv.conf
changed the host IPs in /etc/hosts to 192.168.xxx.yyy |
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Tue Sep 7 23:34:15 2010, Kiwamu, Sanjit, Configuration, Computers, e-log
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e-log was repeatedly hanging and several attempts to start the daemon failed.
problem was solved after clearing the (firefox) browser cache, cookie, everything!!
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Tue Sep 7 14:42:02 2010, Dmass, Configuration, elog, elog restarted
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| elog crashed on an upload. restarted and it worked fine with the same file. |
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Tue Sep 7 22:21:47 2010, Dmass, Configuration, elog, elog restarted
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Quote:
elog crashed on an upload. restarted and it worked fine with the same file. |
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Tue Sep 7 22:21:17 2010, Alberto, Configuration, Computers, elog restarted
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| |
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Tue Sep 7 20:44:54 2010, Yoichi, HowTo, COMSOL Tips, COMSOL example for calculating mechanical transfer functions
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I added COMSOL example files to the 40m svn to demonstrate how to make transfer function measurements in COMSOL.
https://nodus.ligo.caltech.edu:30889/svn/trunk/comsol/MechanicalTF/
The directory also contains an (incomplete) explanation of the method in a PDF file. |
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Tue Sep 7 15:57:07 2010, Alberto, Configuration, Computers, Nodus connection not working. Fixed
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[Joe, Alberto]
The Nodus connection to the Martian network stopped working after someone switched cables on the Netgear router. Apparently that router doesn't
like to have the 23 and 24 ports connected at the same time. |
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Tue Sep 7 15:31:28 2010, josephb, alex, Update, CDS, Binary Output working/ IO chassis fixed
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As noted previously, we were having problems with getting multiple 32 channel binary output
cards working. Alex came by and we eventually tracked the problem down to an incorrect counter in the c code. This has been fixed and checked
into the CDS svn repository. I tested the actual hardware and we are in fact able to turn our test LEDs on with multiple binary output boards. |
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Tue Sep 7 13:31:49 2010, Alberto, Update, Electronics, RF System - Frequency Distribution Box - Priority Plan
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We need a distribution unit in the LSC rack to: 1) collect the demod signals coming from the Frequency Generation Box 2) adjust the power level 3) generate
2nd harmonics (for POP) 4) distribute the demod signals to the single demodulation boards.
The base line plan is the following: |
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Tue Sep 7 08:56:00 2010, Alberto, Update, Electronics, Frequency Generation Box Assembly - Phase Noise Measurements
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Here are the results of my phase noise measurements on the 7 outputs of the Frequency Generation Box. (BIN=95L applied by DTT). See attached pdf for
a higher definition picture.
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Mon Sep 6 22:09:11 2010, Alberto, Update, Electronics, RF Frequency Generation Box heat sink installed and tested
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Last week I noticed that the high power amplifiers in the Frequency Generation Box became hot after 2 hours of continuous operation with the lid of the
box closed. When I measured their temperature it was 57C, and it was still slowly increasing (~< 1K/hr).
According to the data sheet, their maximum recommended temperature is 65C. Above that their performances are not guaranteed anymore. |
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Mon Sep 6 20:38:58 2010, Koji, Update, CDS, Susension model reviewed
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I have reviewed the suspension model of C1SUS and refined it.
It is comaptible to the current one but has minor additions. |
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Mon Sep 6 21:08:44 2010, rana, Update, CDS, Susension model reviewed
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We must remember
that we are using the Rev.B SOS Coil Drivers and not the Rev. A. |
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Fri Sep 3 23:42:34 2010, Jenne, Update, PSL, PSL update of the day
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Rana and I were poking around on the PSL table today, getting a few more items raised to the correct height.
I checked the polarization state of the new NPRO by using a HWP to minimize the transmission through a PBS cube, and then compared the power transmitted
through the cube vs. reflected. When the NPRO current was 0.772 \pm 0.001 (as read on the LCD), the transmission through the cube was 1.44mW, while |
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Mon Sep 6 01:46:58 2010, rana, Update, PSL, PSL update of the day
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To bypass the polarizer issue, I just used cubes. One I took from the FSS-Refcav path and the other from the power control part of the old MOPA, just
downstream of the MOPA's periscope.
We'll swab these out with the thin-film polarizers after we get the mounts made. |
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Fri Sep 3 11:03:41 2010, Alberto, Frogs, Electronics, Cable cutting tools
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I found this very interesting German maker of cool cable cutting tools. It's called Jokari.
We should keep it as a reference for the future if we want to buy something like that, ie RF coax cable cutting knives.
http://www.jokari.de/en.htm |
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Fri Sep 3 13:04:30 2010, Koji, Frogs, Electronics, Cable cutting tools
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Yeah, this looks nice.
And I also like to have something I have attached. This is "HOZAN P-90", but we should investigate American ones
so that we can cut the wires classified by AWG. |
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Thu Sep 2 01:44:13 2010, Jenne, Update, PSL, PSL beam hitting the PMC!
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[Rana, Jenne]
More PSL progress.
The new laser was raised to a 4 inch beam height using basically the most randomly thrown together method possible. (It'll work just fine |
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Fri Sep 3 06:55:42 2010, rana, Update, PSL, PSL beam hitting the PMC!
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NPRO
Koji and I inspected and photographed the laser after opening up its case. I then drilled the clearance holes in the 4 corners and tapped holes
for 1/4-20. I was careful to tap with the laser sideways, to avoid shavings getting into the laser and suctioned out as much of the pieces as I could. |
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Thu Sep 2 17:43:30 2010, josephb, Update, CDS, One working BO output module, others not so much
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Joe and Kiwamu:
We found one bug in the RCG code, where the second input for the CDO32 part (32 binary output) was simply a repeat of the first input, and totally
ignored the second input. This was fixed in the /advLigoRTS/src/epics/util/lib/CDO32.pm file by changing |
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Thu Sep 2 16:45:48 2010, josephb, Update, CDS, Numbering scheme of the PCI bus
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Rolf has recently written a document describing how one should fill out an IO chassis and how the numbering works out. This can be found in the
DCC at Rolf's PCIe numbering guide (T1000523).
Basically it works out that slot 1 corresponds to PCIe number 1, but slot 2 corresponds to PCIe number 6. And so forth. The following |
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Thu Sep 2 16:41:32 2010, steve, Configuration, SAFETY, laser is ON: safety glasses required!
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I hooked up interlock to the Innolight 2W 1064 nm in the enclosure. The manual shutter is closed on this unit.
SAFETY GLASSES REQUIRED ! |
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Thu Sep 2 14:11:17 2010, steve, Summary, PEM, south end crane balancing is completed
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The crane I -beam now leveled at all degrees of rotation. The lower hinge was moved southward about 1/4 of an inch. Performance was
tested at 2000 lbs
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Thu Sep 2 01:48:23 2010, Jenne, Frogs, Treasure, Not cool....
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This totally creeped me out when I found it wandering around on the floor not so far from my desk:
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Wed Sep 1 11:34:39 2010, Alberto, Update, Electronics, FSS Box Phase Noise from DAQ
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I measured the phase noise of the LO output of the FSS box from the DAQ. I'm attaching the results.
As we expected, the measurement is limited by the internal phase noise of the Marconi.
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Wed Sep 1 12:34:14 2010, rana, Update, Electronics, FSS Box Phase Noise from DAQ
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The differences between this setup and the one used previously is the lack of the 50 Ohm terminator in the mixer output and
that the SR560 readout with the G=100 should come before the first SR560 via T, so as not to be spoiled by the high noise of the G=1 SR560. |
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Wed Sep 1 16:29:28 2010, Alberto, Update, Electronics, FSS Box Phase Noise from DAQ - Measurement setup modified
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Quote:
The differences between this setup and the one used previously is the lack of the 50 Ohm terminator in the mixer output |
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Wed Sep 1 17:17:42 2010, rana, Update, Electronics, FSS Box Phase Noise from DAQ - Measurement setup modified
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| With the setup now working, we should now test the power filtering for the crystal and amplifier. |
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Wed Sep 1 12:24:47 2010, josephb, Update, CDS, Trying to get up to date CDS code runnning
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Alex, Joe:
We copied the latest x02 to c1x02 and modified to our the config block in it.
We removed gds_node_id. We just have one number now, the dcuid, which is unique for each controller, simulated plant and IOP. Set site |
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Wed Sep 1 10:54:15 2010, steve, Update, PEM, more crane balancing
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| Crane balancing at the south end is continuing today. |
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Wed Sep 1 07:52:27 2010, Alberto, Configuration, Electronics, PMC board unplugged, turned on Sorensen switches on 1Y1 rack
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Today I put the FSS frequency box back into the 1Y1 rack.
To power it on, I turned on the 24V and 15V Sorensen switches in the same rack.
The PMC crystal board in the same rack should not be affected (it runs with 10V), but, to make sure it was not powered, I disconnected it from |
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Wed Sep 1 08:40:28 2010, Alberto, Configuration, Electronics, PMC board unplugged, turned on Sorensen switches on 1Y1 rack
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Quote:
Today I put the FSS frequency box back into the 1Y1 rack. |
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Mon Aug 30 23:21:36 2010, rana, HowTo, PSL, 2W NPRO Mount designed with emachineshop.com software
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To test out this website - emachineshop.com, Jenne and I are designing some of the mounts for the new beam height.
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Tue Aug 31 19:46:00 2010, rana, Update, PSL, PSL upgrade update
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Steve is handling the mount height increase for the PMC and RC steering mirrors, as well as a mount (non-steerable) for the ISS' AOM.
Rana is working on the laser mount.
Jenne is drawing and getting the PMC mount made.
We got the lenses from CVI for
the mode matching, but not the metric screws for the laser mounting. I am tempted to tap holes in the laser base.
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Wed Sep 1 08:28:43 2010, Koji, Update, PSL, PSL upgrade update
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Quote:
We got the lenses from CVI for the mode matching, but not the metric screws for the laser mounting. |
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Wed Sep 1 08:36:59 2010, Koji, HowTo, PSL, 2W NPRO Mount designed with emachineshop.com software
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1. I can not see whether the attaching surface is flat or not.
It should have ~1mm step to avoid "the legs" of the laser at the four corners.
Otherwise we will have ~0.5mm space between the block and the laser |
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Tue Aug 31 17:58:38 2010, Alberto, Update, Electronics, FSS Frequency Generation Box - Phase Noise
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A few weeks ago, on Jul 24, Rana and I measured the phase noise of the FSS frequency box (aka the 'Kalmus Box'). See elog entry 3286.
That time, for some reason, we measured a phase noise higher than we expected; higher than that of the Marconi.
I repeated the measurement today using the SR785 spectrum analyzer. Here is the result: |
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Tue Aug 31 16:42:26 2010, josephb, Update, CDS, Temporarily reverting to CDS revision 2005
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Apparently updating to the latest revision of the RCG has some issues with diaggui and awgtpman. Alex had to do some recompiling up at Hanford
which apparently took him some time. He'll be coming by tomorrow to try to bring those codes to the front end machines.
As a temporary fix, until Alex gets here tomorrow, we're reverting to the 2005 revision in the svn of the cds code. I'm placing it in the |
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Tue Aug 31 13:31:00 2010, steve, Update, PEM, room temp lowered
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| I lowered room 101 thermostat setting from 74F to 72F |
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Tue Aug 31 15:26:46 2010, rana, Update, PEM, room temp lowered
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And I raised it back to 73F. The thermometers on the wall show 74-75F as the actual room temp. The dial on the temperature controller is not calibrated.
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Tue Aug 31 14:47:53 2010, steve, Configuration, PEM, toilet upgrade
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| Our toilets were replaced by a green Gerber 1.6 gpf ( 6 lpf ) last week. |
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Tue Aug 31 11:50:14 2010, kiwamu, Update, CDS, maximum number of BIOs
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{ Joe and Kiwamu },
Now we are able to compile the model file with
more than 4 binary input/outputs (BIOs). |
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Tue Aug 31 10:44:17 2010, steve, Update, PEM, concrete sealed
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The PSL -leg concrete was sealed with a single coat of SCOFIELD Cureseal-S to minimize shedding of particles.
The optical table was covered and optics were removed from the shelf. Accelerometers were turned off. |
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Tue Aug 31 02:50:45 2010, kiwamu, Update, CDS, vertex suspensions controlled by the new CDS
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I plugged the new CDS to the vertex suspensions.
Now PRM, SRM, ITMs, MCs and BS are under the control of the |
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Thu Aug 26 13:08:03 2010, josephb, Update, CDS, Watch dogs for Vertex optics turned off
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We are in the process of doing a damping test with the real time code and have turned off the vertex optics watchdogs temporarily, including BS, ITMs,
SRM, PRM, MCs. |
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Thu Aug 26 17:10:26 2010, kiwamu, Update, CDS, new CDS test
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[Joe, Kiwamu]
Woo |
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Fri Aug 27 17:27:41 2010, kiwamu, Update, CDS, new CDS test
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{ Joe, Kiwamu }
Yes !
We now are damping all of the vertex suspensions including |
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Fri Aug 27 19:30:31 2010, rana, Update, CDS, SLOW controls
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For the future SLOW controls our current plan is to keep using the VME based stuff and associated processors (Baja, Motorola, etc.). This is not
a sustainable plan since these are obsolete and eventually will die. One option is to use these boxes from Diamond Systems:
http://www.diamondsystems.com/products/octavio |
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Mon Aug 30 22:45:49 2010, kiwamu, Update, CDS, binary outputs for the new CDS
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{ Joe and Kiwamu }
Today we made some efforts to get the binary outputs (BOs) working.
They still are not working but the situation is getting better. |
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Fri Aug 27 14:03:43 2010, kiwamu, Update, CDS, Watch dogs for Vertex optics turned off
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For a futher damping test, I again turned off the vertex optics watchdogs temporarily, including BS, ITMs,
SRM, PRM, MCs. |
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Mon Aug 30 18:35:22 2010, Jenne, Update, WienerFiltering, Secret Hiding Place for Raw Data
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As it turns out, data seems to fall off the 16Tb drives after ~20 days. Which makes it a good thing that I saved all of my raw data from my good
Mode Cleaner / seismic weekend for offline Wiener Filtering in the following secret place:
/cvs/cds/caltech/users/jenne/AdaptiveFiltering/mat/MCseis_raw_data_7Aug2010 |
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Mon Aug 30 13:57:25 2010, Koji, Summary, PSL, PSL table vibrational performance after the upgrade
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Jenne and Koji
Last week Jenne has put the accelerometers on and under the PSL table immediately after the plastic sheets were removed.
So I took the same measurement as I did on 9th Aug. |
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Mon Aug 30 18:22:00 2010, rana, Summary, PSL, PSL Enclosure is UNSTABLE
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The lifting and resetting of the BLUE PSL enclosure has made it unstable somehow. When I push on it a little it rocks back and forth a
lot.
Steve, please look into what's happening and stiffen it if you can. Its too unstable right now. |
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Sun Aug 29 21:18:00 2010, rana, Update, Computers, kallo -> rossa
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We changed the name of the new control room computer from kallo to rossa (since its red).
I also tried to install the nVidia graphics driver, but failed. I downloaded the one for the GeForce 310
for x86_64 from the nVidia website, but it failed to work. I installed it, but then X windows wouldn't start. |
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Mon Aug 30 11:41:34 2010, kiwamu, Update, Computers, disable sendmail and isdn
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{Rana and Kiwamu}
Yesterday we disabled the sendmail daemon and the isdn daemon on allegra because we don't need these daemons always running.
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Sat Aug 28 08:17:51 2010, Aberto, Update, Electronics, FSS Frequency Generation Box under test
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| I've taken the FSS frequency generation box out of the 1Y1 rack. It's sitting on one of the electronics benches. I'm measuring its phase noise. |
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Fri Aug 27 22:09:37 2010, Jenne, Update, PSL, The beginnings of the new PSL
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[Rana, Jenne]
Like a new phoenix, the 40m PSL is in the process of being reb |
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Sat Aug 28 01:02:31 2010, rana, Update, PSL, The beginnings of the new PSL
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In fact, many of the mounts need to be adapted to 4": the beefy steering mirrors going into the PMC, the PMC RFPD, the ISS AOM, the
Faraday between the NPRO and the AOM, the NPRO itself, the ISS PDs.
Also for the FSS: the 21.5 MHz EOM, the PBS, the AOM, the refcav periscope, and the RFPD. |
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Fri Aug 27 13:41:02 2010, kiwamu, Update, SUS, fix watchdogs
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[Joe, Kiwamu]
We found that the vertex watchdogs were not correctly running.
After I powercycled c1susaux, the problem was fixed successfully. |
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Fri Aug 27 11:27:33 2010, steve, Update, PEM, crane safety document
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I posted the crane safety document on the 40m wiki, vacuum page as 26 August 2010
Please add your comments and corrections.
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Fri Aug 27 11:24:13 2010, Jenne, Omnistructure, Computers, op540m dead
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I think op540m has finally bitten the dust. I noticed
that both of its screens were black, so I assumed that it had crashed due to known graphics card issues or something. But upon closer inspection,
it is way more dead than that. I checked that it does have power (at least the power cable is securely plugged in at both ends, and the power strip |
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Fri Aug 27 07:21:13 2010, Alastair, Update, General, elog...
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| was down. I restarted the version in the 2.7.5 folder. It went down again almost immediately but stayed up after the second restart. |
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Wed Aug 25 16:13:32 2010, steve, Summary, PEM, PSL optical table is back into operation at 32.75" level
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The tile work was done yesterday after noon.
This morning Mike Gerfen and me lowered the enclosure frame to normal height.
Keven- janitor and I removed plastic covers from chambers, racks, SP, MC2 and clean tool boxes. |
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Wed Aug 25 15:55:33 2010, josephb, Update, elog, Staying with 2.7.5 until passwords sorted out
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Turns out the elog version 2.8.0 uses a different encryption method than 2.7.5. This mean the encrypted passwords stored in the elogd.cfg don't
work with the new code. elogd includes functionality to generate encrypted passwords, but unfortunately I don't know the administration passwords
for some of the logbooks. So I'm going to leave 2.7.5 running until I can get those added properly to the 2.8.0 cfg file. |