40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 102 of 341  Not logged in ELOG logo
ID Date Author Type Categoryup Subject Text Attachments
  4377   Fri Mar 4 09:47:46 2011 SureshUpdateElectronicsHarmonic distortion calculations for RF distribution box 
Fast work indeed! It would be nice
if we could have the following details filled
  
  4395   Thu Mar 10 01:31:37 2011 KevinUpdateElectronicsAS55 CharacterizationsI measured the transfer function, shot
noise, and dark spectrum of AS55.
From the shot noise measurement,
  
  4402   Thu Mar 10 17:03:48 2011 Larisa ThorneConfigurationElectronicscalculations for passive low pass filter on X arm[Kiwamu, Larisa] 
 
We want to increase gain in the lower
  
  4434   Wed Mar 23 16:06:20 2011 Larisa ThorneUpdateElectronicsUpdate on cable laying [Steve, Suresh, Larisa]
The following cables were laid today:
ETMYT, ETMY, IFOPO, MC1, OMCR, AS Spare,
  
  4456   Tue Mar 29 15:01:58 2011 Larisa ThorneUpdateElectronicsLow pass filter for X arm laser temperature control This is the continuation of http://nodus.ligo.caltech.edu:8080/40m/4402
 
 DSC_2889.JPGLPFgraph.pdf 
  4457   Tue Mar 29 15:50:21 2011 KojiUpdateElectronicsLow pass filter for X arm laser temperature controlFor bode plot:

USE LOG-LOG plot for the amplitude
  
  4459   Wed Mar 30 02:55:02 2011 SureshConfigurationElectronicsRF System : Status and PlansI have prepared several diagrams outlining
the current state of the RF System.
These are uploaded into the svn40m
  
  4492   Wed Apr 6 16:02:07 2011 Larisa ThorneUpdateElectronicsCable laying...continued[Steve, Kiwamu, Larisa]
 
Having finished laying new cable
  
  4507   Mon Apr 11 09:49:53 2011 ranaUpdateElectronicsNew Green PD test1 Ooh. Can you explain the purpose
of the resistors which are connected to the
(+) inputs? It looks like some real electronics
  
  4508   Mon Apr 11 11:34:05 2011 KojiUpdateElectronicsNew Green PD test1

    

       
            
 SGD444A_240_test.png 
  4512   Mon Apr 11 20:03:05 2011 taraUpdateElectronicsTTFSS for 40mI brought TTFSS set #7 to 40m and kept
it in the electronic cabinet.
note that Q4 transistor has not been
  
  4513   Mon Apr 11 21:13:15 2011 KojiUpdateElectronicsNew Green PD test1Correction:
The (-) input has been decoupled
by the capacitor. So the series resistance
  
  4519   Wed Apr 13 16:38:17 2011 Larisa ThorneUpdateElectronicsVideo MUX camera/monitor check [Kiwamu, Larisa]
 
The following Video MUX inputs(cameras)
  
  4531   Fri Apr 15 13:40:00 2011 Larisa ThorneUpdateElectronicsLow pass filter for X arm laser temperature control, second tryPlotting the data points yielded by the
spec analyzer of my first LPF yielded a result
that was not expected: the desired cutoff
 Bode2.jpegBode100k.jpg 
  4568   Tue Apr 26 01:20:02 2011 ranaUpdateElectronicsPOX_11 debuggingThe performance plots for   
  4569   Tue Apr 26 22:03:49 2011 ranaUpdateElectronicsPOX_11 debuggingI used the Jenne AM laser to tune up the
PD (used to be POX_11 but now is called REFL_11).
In addition to the notch at 22 MHz, I have
 MM7.png 
  4572   Wed Apr 27 15:34:38 2011 kiwamuUpdateElectronicsAS55 demod board with new 90 deg splitter : healthy
A new 90 deg splitter, PSCQ-2-51W,
  
  4573   Wed Apr 27 17:38:01 2011 kiwamuUpdateElectronicsRe : AS55 demod board with new 90 deg splitter : healthy   relativephase.pngIQamplitude.png 
  4601   Mon May 2 21:14:55 2011 kiwamuUpdateElectronicstoo loose Heliax connectors on 1Y2 rackI found that
all the Heliax cables landing on the bottom
 DSC_2982_ss.jpgDSC_2984_ss.jpg 
  4602   Mon May 2 23:29:57 2011 SureshUpdateElectronicstoo loose Heliax connectors on 1Y2 rackThe countersink
gives rise to another problem when we mount
the N-type-to-SMA bulkhead adaptor. 
  
  4612   Tue May 3 14:35:44 2011 Larisa ThorneConfigurationElectronicsJenne-Seismometer LPF project I was charge with making a Non-Inverting
Op Amp Low Pass Feedback circuit for Jenne,
which may somehow be integrated into a seismometer
 SeisLPFdiagram.jpgseisLPF.Bose.jpg 
  4614   Tue May 3 15:48:26 2011 Larisa ThorneUpdateElectronicslaser temperature control LPF, final version!This is a continuation of this
 The low pass filter is finally
acceptable, and its Bode graph is below (on
 LPF100k.2.jpg 
  4618   Tue May 3 17:19:25 2011 kiwamuUpdateElectronicsHeliax connectors on 1Y2 rack : tightenedMy observation wasn't accurate enough.
The
looseness came from the fact that the N-SMA
  
  4630   Wed May 4 17:32:06 2011 Larisa ThorneConfigurationElectronicsJenne-Seismometer LPF projectBuilding on what was posted previously
 
 
 SeisLPF3.jpg 
  4634   Thu May 5 12:01:53 2011 Larisa ThorneConfigurationElectronicsJenne-Seismometer LPF project Having finished the bulk of the work
for the LPF itself ( see here ),
I have begun trying to design the seismometer
 STS2diagram.png 
  4685   Wed May 11 10:49:16 2011 valeraConfigurationElectronicsMC3 LL PD has no signalYesterday we found that MC3 OSEM LL PD
did not have a sensible signal - the readback
was close to zero and it was making MC move
  
  4690   Wed May 11 16:04:36 2011 Larisa ThorneConfigurationElectronicsJenne-Seismometer LPF projectThe schematic for the seismometer box from
this last
time  has been updated...
 STS2diagram2.png 
  4691   Wed May 11 17:10:04 2011 kiwamuConfigurationElectronicsfixed : MC3 LL PD has no signal[Valera / Kiwamu]
It was because of a loose connection.
Pushing the connector solved the issue.
 looseconnectionMC3.png 
  4728   Mon May 16 17:11:28 2011 steveUpdateElectronicsstrain relieved 1X11X1 is strain relieved in the back. I will
use similar approach on the rest of the racks
.
 P1070724.JPG 
  4742   Wed May 18 18:48:46 2011 kiwamuUpdateElectronicsidentification of RFPD interface cables[Haixing / Kiwamu]
 As a part of the Wednesday's
cabling work, we spent some times for identifying
  
  4747   Thu May 19 03:13:54 2011 kiwamuUpdateElectronicsREFL11 not working
 1305799561ZgerKtrd.gif 
  4756   Fri May 20 11:37:44 2011 KojiUpdateElectronicsREFL11 fixed (REFL11 not working)- Found the inductor which shunts the positive
input of MAX4107 was not touching the ground.
 REFL11_transimpedance.pdf 
  4758   Sat May 21 17:02:38 2011 KojiUpdateElectronicsAlberto's 11MHz was modified to POP55MHz- Resonant at 55MHz. The transimpedance
is 258Ohm. That is about half of REFL55 (don't
know why).
 POP55_schematic_110520_KA.pdfPOP55_transimpedance.pdf 
  4774   Tue May 31 16:07:57 2011 Larisa ThorneConfigurationElectronicsSeismometer Box Update (Continuation of this)
 
I plugged the circuit into the LISO
 SeisBoxLISOplot1.pdfSeisBoxLISOplot2.pdfSTS2diagram_original.pdf 
  4777   Wed Jun 1 13:33:22 2011 koji, taraUpdateElectronicsTTFSS #7 We replaced GE81 by PZT2907A (PNP transistor)
in TTFSS #7, it's working fine.
  Last time I broke Q4 transistor,
 q4.png 
  4782   Thu Jun 2 23:10:10 2011 KojiUpdateElectronicsREFL11 test results (Re: REFL11 fixed)The full characterization of REFL11 is
found in the PDF.
Resonance at 11.062MHz
 REFL11_test.pdf 
  4783   Fri Jun 3 14:27:32 2011 KojiUpdateElectronicsPOP55 test resultsThe full characterization of POP55 is found
in the PDF.
Resonance at 54.49MHz
 POP55_test.pdf 
  4785   Sat Jun 4 15:26:04 2011 Larisa ThorneUpdateElectronicsSeismometer Box Update (continuation of this)
 
Here are the transfer function and
 SeisBoxLISO_transfer.pdfSeisBoxLISO_noise.pdf 
  4786   Mon Jun 6 02:09:39 2011 ranaUpdateElectronicsPOY11 Rework Nearly CompleteI've  777.png 
  4787   Mon Jun 6 16:44:34 2011 KojiUpdateElectronicsPOY11 testedThe full characterization of POY11 is found
in the PDF.
Resonance at 11.03MHz
 POY11_test.pdf 
  4807   Fri Jun 10 20:23:56 2011 Larisa ThorneUpdateElectronicsSeismometer Box Update/graphs (continuation of this)
 
The noise graphs relating total noise
 SeisNoiseGraphs.jpg 
  4810   Mon Jun 13 16:27:10 2011 JenneUpdateElectronicsSeismometer Box Update/graphs


   
        
            
 NewSeisBoxNoise.png 
  4830   Fri Jun 17 00:17:26 2011 ranaConfigurationElectronics2 RFPDs sent to LLOKoji and I found 2 RFPD boxes to
send to LLO. We've put them onto Steve's
desk to be overnighted to Valera.
 P1070895.JPG 
  4900   Tue Jun 28 15:23:21 2011 steveUpdateElectronicsCoilcraft RF-design kits are restockedOur design kits are full again. They are
waiting for a new brilliant PD design.
 P1070917.JPGP1070915.JPG 
  4979   Sat Jul 16 18:54:05 2011 Ishwita, ManuelConfigurationElectronicsAA boardWe fixed the anti-aliasing board in its
aluminum black box,  the box couldn't
be covered entirely because of the outgoing
 DSC_3236.JPGpic1.pngDSC_3237.JPG 
  5008   Wed Jul 20 22:16:27 2011 Ishwita, ManuelUpdateElectronicslying seismometer cable and plugging itWe laid the cable along the cable keeper
from the BACARDI seismometer to the rack
1X6, the excess cable has been coiled under
  
  5022   Sun Jul 24 20:36:03 2011 haixingSummaryElectronicsAA filter tolerance analysisKoji and Haixing,
We did a tolerance analysis to specify
the conner frequency for passive low-pass
 6x 
  5023   Sun Jul 24 20:47:21 2011 ranaSummaryElectronicsAA filter tolerance analysisThis is sort of OK, except the capacitor
connects across the (+) terminals of the
two input opamps, and does not connect to
  
  5024   Sun Jul 24 22:19:19 2011 haixingSummaryElectronicsAA filter tolerance analysis 
>> This sort of OK, except
the capacitor connects across the (+) terminals
 low_pass_new.png 
  5034   Mon Jul 25 23:43:20 2011 ManuelHowToElectronicsManual for 1201 Low Noise PreamplifierI found the manual for the Low Noise Preamplifier
Model 1201 at this
link and I attached it.
 ITHACO_1201_Instruction_&_Maintenance.pdfDSC_3249.png 
ELOG V3.1.3-