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  40m Log, Page 123 of 341  Not logged in ELOG logo
ID Date Author Typeup Category Subject Text Attachments
  3858   Wed Nov 3 23:58:45 2010 ranaUpdateElectronicsCougarsI looked at this web page: http://www.teledyne-cougar.com/Index.asp
for the RF company that Rich has recently
started using.
  
  3859   Thu Nov 4 03:13:46 2010 SureshUpdateLockingFibre coupling 1064nm light at the south-end table[Kiwamu,
Suresh]
We
  
  3860   Thu Nov 4 15:15:43 2010 josephbUpdateCDSModified feCodeGen.pl, fmseq.pl, and suspension screensFeature Requested:
Have the CPU_meter change change
color at various alarm levels.  These
  
  3861   Thu Nov 4 15:27:33 2010 josephb, yutaUpdateCDSc1ioo test points not workingProblem:
We can't access any of the c1ioo
computer testpoints.  Dataviewer and
  
  3862   Thu Nov 4 17:24:49 2010 steveUpdateGeneralconflat flanges for MIT8 pieces of 10" CF blanks were shipped
to MIT
 P1070020.JPG 
  3863   Thu Nov 4 17:53:29 2010 yutaUpdateCDSprimitive python script for A2L measurementSummary:
 
I wrote
 a2ltest.png 
  3864   Thu Nov 4 17:57:27 2010 steveUpdateGeneralBeamScanner is working againKoji, Suresh and Steve,
The beam scanner is back from repair. 
Koji and Suresh helped to move the I/O address
 P1070024.JPG 
  3865   Thu Nov 4 19:00:57 2010 SureshUpdateLockingFibre coupling 1064nm light at the south-end tableThe Fluke
Visual Fault locator (Visifault) arrived
and I used it to couple 1064nm light into
  
  3866   Thu Nov 4 19:26:51 2010 SureshUpdateLockingChanges to the Video MUX reversedAll the
temporary changes to the video cables and
the video MUX ( 3843
  
  3867   Fri Nov 5 09:08:14 2010 steveUpdateSUSepoxyPhysical Electronics: Vac-Seal #288-6000
arriving Monday. Our last bag used last week
had a p/n 1002003 with expiration date  
 11081001.PDF 
  3868   Fri Nov 5 14:06:19 2010 yutaUpdateIOOtried to align MC by A2L measurement(Suresh, Kiwamu, Yuta)

Summary:
 A2LmeasurementFigures.png 
  3870   Fri Nov 5 16:40:22 2010 josephb, alexUpdateCDSc1ioo now has working awgtpmanProblem:
We couldn't set testpoints on the
c1ioo machine.
  
  3871   Fri Nov 5 19:33:18 2010 JenneUpdateElectronicsThe beginnings of the new phase of the RF workJoon Ho and I took a look at the RF stuff
that Alberto left, and we determined that
we've got most everything that we need. 
  
  3874   Sat Nov 6 00:49:04 2010 KojiUpdateIOOIMC table work[Suresh, Koji]
- Removed MCT optics in the
  
  3878   Mon Nov 8 10:37:14 2010 KojiUpdateIOOThe 10% pick-off for MCREFL was replaced to a HR mirrorAs MC2 Trans mon QPD is temporary removed
for fixing, we needed a reference for the
MC alignment.
  
  3879   Mon Nov 8 10:48:58 2010 kiwamuUpdateGreen Locking80MHz VCO : PLL open loop looks good   vco_pll.pngVCO_PLL.png 
  3880   Mon Nov 8 14:30:15 2010 josephb, yutaUpdateCDSAdded LIGONDSIP setting to cshrc.40mWe added the following line to the cshrc.40m
file in the 64-bit linux and 32-bit linux
sections:
  
  3881   Mon Nov 8 16:03:46 2010 kiwamuUpdateGreen Locking80MHz VCO : PLL open loop looks good


   
        
            
  
  3882   Mon Nov 8 18:30:33 2010 SureshUpdateIOOMC Trans Mon QPD gain increased by 50xIncreased
the transimpedance gain of the MC-Trans-Mon
QPD ckt 
  
  3888   Wed Nov 10 22:29:42 2010 kiwamuUpdateIOOmisaligned the wideband EOMFor Yuta's
business, I intentionally misaligned the
  
  3889   Thu Nov 11 01:34:27 2010 JenneUpdateSUSNew-Old ETM towers assembled[Suresh, Jenne]
We have put together the new-old
ETM towers.  These are the ones which
  
  3890   Thu Nov 11 02:17:27 2010 KevinUpdateElectronicsREFL11 Photodiode Not Working[Koji and Kevin]
I was trying to characterize the
REFL11 photodiode by shining a flashlight
  
  3893   Thu Nov 11 07:26:03 2010 AlbertoUpdateElectronicsREFL11 Photodiode Not Working


   
        
            
  
  3896   Thu Nov 11 13:54:05 2010 kiwamuUpdateGreen Locking80MHz VCO : about PLL hold-in range

The hold-in
 range_green.pngPLL.png 
  3898   Thu Nov 11 17:47:36 2010 kiwamuUpdateGreen Locking80MHz VCO : improve PLL hold-in range and put a boostIn order
to enlarge the hold-in range I modified the
 vco_pll.pngVCO_lfb.png 
  3899   Thu Nov 11 18:05:55 2010 valeraUpdatePSLPMC mode matching at full laser power The
PMC mode matching was initially done at low
power ~150 mW. It was expected and found
 scan.pdfpmc2-abcd.png 
  3900   Thu Nov 11 21:07:49 2010 josephbUpdateCDSPlugged c1iscex into DAQ network - still causes network slowdownI connected the c1iscex computer to the
dedicated DAQ network switch (located in
1X7).
  
  3902   Fri Nov 12 00:13:34 2010 SureshUpdateSUSETM assembly started[Jenne,
Suresh]
Selection
  
  3903   Fri Nov 12 00:42:11 2010 rana, kojiUpdateIOOMC alignmentWe decided to ignore the computer script
outputs for the beam positions and use instead
the eyeball method to get the beam into the
  
  3904   Fri Nov 12 02:51:20 2010 KevinUpdateElectronicsPhotodiode Testing[Jenne and Kevin]
I started testing the REFL55 photodiode.
With a light bulb, I saw ~270 mV of DC voltage
  
  3905   Fri Nov 12 06:10:24 2010 yutaUpdateIOOMC aligned (without coil balancing)Background:
  Last night, we found that one
of DAC channels are poorly connected, so
 MCalignCALIB.png 
  3906   Fri Nov 12 10:49:34 2010 josephb, valeraUpdateCDSTest of ADC noiseTest:
Look at the effects of the ADC voltage
range on the ADC noise floor.
 ADC_noise.pdf 
  3909   Fri Nov 12 13:12:55 2010 kiwamuUpdatePSLincreased NPRO powerI maximized
the laser power by rotating the HWP after
  
  3910   Fri Nov 12 19:24:56 2010 KojiUpdateCDSTest of ADC noise[Koji Yuta]
We found one of the ADC cables were
left unconnected. This left the MC suspensions
  
  3912   Sat Nov 13 15:53:05 2010 yutaUpdateCDSdiagonalization of MC input matrixMotivation:
  MC is aligned from the A2L
measurement, but to do the beam centering
 MCspectraNov09.pngMCspectraNov13.pngMC1spetra_wrongmatrix.png 
  3915   Sun Nov 14 11:56:59 2010 valeraUpdateCDSTest of ADC noise 
We missed
  
  3916   Sun Nov 14 16:26:31 2010 jenne, valeraUpdateElectronicsSRM side OSEM noise with no magnetWe realized that the SRM sensors are connected
to the readout but just sitting on the BS
in vacuum table with no magnets and therefore
 SRM-SD-Current-NoMagnet.pdf 
  3917   Sun Nov 14 16:40:46 2010 JenneUpdateTreasureActivities related to OSEM measurement[Valera, Jenne]
We pondered the idea of clamping
the PRM optic to measure the OSEM noise. 
  
  3918   Mon Nov 15 04:57:10 2010 ranaUpdateElectronicsSRM side OSEM noise with no magnetIF I believe this calibration and IF I
believe that the noise is the same with no
magnet in there, then its almost 1
  
  3919   Mon Nov 15 11:13:12 2010 josephbUpdateCDSModified rc.local to not start mx_streams automaticallyProblem:
c1iscex floods the network with about
1 gigabyte of error messages in a few seconds,
  
  3920   Mon Nov 15 11:52:22 2010 kiwamuUpdateGreen LockingPLL with real green signal   PLL_with_green.png 
  3921   Mon Nov 15 14:36:37 2010 KojiUpdatePSLC1PSL rebooted? Has C1PSL rebooted? Has burtrestore been
forgotten? Even without elog?
We found some settings are wrong
  
  3922   Mon Nov 15 14:42:01 2010 AidanUpdatePSLC1PSL rebooted? Yeah. Joe and I rebooted c1psl a couple
of times this morning. I didn't realize the
burtrestore wasn't automatic.
  
  3923   Mon Nov 15 15:01:51 2010 kiwamuUpdateIOOrealigned the wideband EOMSince we are going to lock the MC today,
I
aligned it back to the default place.
  
  3925   Mon Nov 15 16:09:44 2010 JenneUpdateVACETMX, ETMY, ITMY chambers opened[Steve, Jenne, Suresh, Koji]
The remaining test mass chambers
have been opened, and have light doors in
  
  3926   Mon Nov 15 16:26:46 2010 josephbUpdateCDSc1iscex is now running and the network hasn't diedProblem:
c1iscex was spamming the network
with error messages.
  
  3927   Mon Nov 15 17:10:59 2010 kiwamuUpdateGreen LockingPLL with real green signal I
checked the slow servo and the PLL of 80MHz
 FCnoise.png 
  3928   Mon Nov 15 22:24:28 2010 SureshUpdateSUSSelection of MagnetsI have
selected a set of 16 magnets which have a
B field between 900 to 950 Gauss (5% variation)
  
  3929   Tue Nov 16 03:33:22 2010 yutaUpdateIOOaligned Faraday, beam reached SM just before PRM(Koji, Yuta)

 MCalignNov16.png 
  3930   Tue Nov 16 09:02:54 2010 AidanUpdateGreen LockingPID loop - calibration of SR620 output [Aidan, Kiwamu]
Kiwamu and I roughly calibrated the
analogue output from the SR620 frequency
  
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