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ID Date Author Type Categorydown Subject Text Attachments
  338   Fri Apr 7 16:19:03 2017 GabrieleOpticsDaily ProgressNew 1103P laser installedThis afternoon I installed the new Lumentum
(former JDSU) HeNe laser, model 1103P in
CR0.
  
  22   Fri Jun 10 13:44:06 2016 GabrieleElectronicsConfigurationHow to setup a workstationInstructions on how to setup a workstation
are available here:

https://nodus.ligo.caltech.edu:8081/Cryo_Lab/1135
  
  26   Wed Jun 29 16:44:17 2016 GabrieleGeneralConfigurationFirst disk eigenfrequencyThe following table shows the lowest eigenfrequency
(Hz) for different sizes of disks

 disk_75mm_1mm.pngeigenfrequencies.png 
  34   Fri Jul 8 16:49:11 2016 GabrieleElectronicsConfigurationCyMAC In the last days Jamie installed the patched
kernel to run the real time system (RTS)
on the new CyMAC. Today (with Jamie's
 Screen_Shot_2016-07-08_at_4.38.16_PM.png 
  35   Mon Jul 11 08:49:25 2016 GabrieleElectronicsConfigurationCymac RTS configurationI copy here parts of an email from Jamie
with instructions on how to run the RTS on
the cymac:
  
  40   Thu Jul 14 15:30:48 2016 ericqElectronicsConfigurationCymac RTS configurationWe played around a bit with the cymac,
in efforts to make things better.


We disabled some more fancy-sounding
  
  42   Thu Jul 14 17:06:47 2016 GabrieleElectronicsConfigurationNetworkingThe laboratory workstation is coatings.ligo.caltech.edu

The RTS is cymac3.ligo.caltech.edu

I set up a ssh-mount of the /opt/rtcds/userapps
  
  50   Mon Jul 18 17:48:58 2016 GabrieleElectronicsConfigurationStatus of real time system and workstation[EricQ, Gabriele]

The real time system seems to be
working properly, except for the excitations:
  
  54   Tue Jul 19 20:19:38 2016 GabrieleElectronicsConfigurationGlitches are a digital artifactThe glitches I saw in the data happens
roughly every second, even though not
exactly on the second. They are suddend jumps
 glitches.pngglitches.pngjump1.pngjump2.png 
  55   Wed Jul 20 10:26:40 2016 GabrieleElectronicsConfigurationAre glitches a digital artifact?Not so sure anymore...


those glitches do not happen
at regular times
I tried to send
  
  58   Fri Jul 22 14:22:10 2016 GabrieleElectronicsConfigurationInvestigations on the signal jumps[Rolf, Ben, Rich, Gabriele]

Rolf couldn't find any good
explanation on the software side for the
 glithces.pngglitch2.png 
  59   Mon Jul 25 12:24:06 2016 GabrieleElectronicsConfigurationMore on the signal jumpsHere are two more tests I did this morning


removed the DAC card from
the cymac and the models, and restarted everything:
 no_glitches_on_cymac2_b.pngno_glitches_on_cymac2.png 
  64   Wed Jul 27 10:19:36 2016 GabrieleElectronicsConfigurationLast finding in the signal jump sagaThis plot shows a signal which is generated
purely digitally inside a code that I was
testing.
 glitch_with_all_digital_signal.pngpmt_cymac3.pngpmt_cymac2.png 
  78   Thu Aug 11 09:10:01 2016 GabrieleElectronicsConfigurationReal time modelCompiled and installed an updated real
time model. It acquires the four QPD segments,
compute sum and differences, and normalize.
 model1.pngmodel2.pngmain_medm.png 
  79   Thu Aug 11 10:59:39 2016 GabrieleElectronicsConfigurationQuadrant calibrationI cross checked the calibration of the
sum channel with a  power meter. Now
all quadnant signals X3:Q?_OUT and the sum
  
  80   Fri Aug 12 10:33:14 2016 GabrieleElectronicsConfigurationStorage added to cymac3Installed two new 2TB disks into the cymac3.
Also, the main disk has a 1TB partition with
the operating system, so I created a new
  
  87   Tue Aug 16 11:57:03 2016 GabrieleElectronicsConfigurationFixed cymac3 network and time issueThe cymac3 internal clock was off by about
10 seconds. When I tried to start the NTP
service, I found out that the cymac3 couldn't
  
  122   Thu Sep 22 13:39:40 2016 GabrieleOpticsConfigurationUpdated design for the new C.Ri.Me. setupToday I measured the amount of space available
on the table for the new (4-fold) C.Ri.Me.
setup. It's 1050 x 1220 mm, with the
 crime_v2.pdf 
  123   Thu Sep 22 15:00:49 2016 GabrieleElectronicsConfigurationEpics values now saved to framesI was looking at some past trend data and
discovered that EPICS values were not written
to the frames. I added the following two
  
  125   Fri Sep 23 08:33:39 2016 GabrieleElectronicsConfigurationEpics values now saved to framesNow EPICS values are saved to frames, but
they are all zero! I noticed that we always
had the same problems with the cymac2 too.
  
  126   Mon Sep 26 15:54:01 2016 GabrieleFacilityConfigurationMoved vacuum controllersI moved the turbo pump controller out of
the clean room. Also, I installed the gauge
controller on the Cymac rack.
 2016-09-26_15.44.13.jpg 
  129   Tue Sep 27 14:54:53 2016 GabrieleElectronicsConfigurationEpics values now saved to framesApparently, there was a mismatch in the
configuration, and DAQD was adding a wonderful
16 Hz comb all over the spectrum.
  
  143   Fri Oct 21 15:27:15 2016 GabrieleElectronicsConfigurationRemoved low pass filter in SUMI removed the low pass filter in the QPD
SUM signal, used for normalization. This
reduced a lot the bump at ~20kHz due to laser
 Screenshot.png 
  158   Fri Nov 4 11:31:11 2016 GabrieleElectronicsConfigurationAutocenter control and model modificationsRemoved the peak meter lock from the model,
since it's not used

Added and EPICS binary bit to control
 Screenshot-Untitled_Window.png 
  173   Thu Nov 10 14:13:34 2016 gabrieleElectronicsConfigurationMATLAB code to control Thorlabs stagesTo be used to automate the laser polishing.  move_complete.mthrolabs_activex.manimation.mdraw_wafer.m 
  217   Tue Nov 29 17:06:13 2016 GabrieleElectronicsConfigurationChanged whitening filters of four more boardsI modified four more QPD boards to implement
the new whitening filters detailed in elog 207.
  
  224   Mon Dec 5 10:39:16 2016 GabrieleElectronicsConfigurationTrying to debug GPS time issueFor a long time I had problems with the
GPS time in frames being different from the
real one.
  
  227   Tue Dec 6 09:02:17 2016 GabrieleElectronicsConfigurationTrying to debug GPS time issueThings seems to be worse now. This morning
I injected noise at GPS 1165078533 (real
time, as obtained from the python command
  
  228   Tue Dec 6 10:38:19 2016 GabrieleElectronicsConfigurationTrying to debug GPS time issueUPDATE:

Now the time difference is about
30 seconds. It seems that the real time model
 Screenshot.pnggps_time_offset.png 
  229   Tue Dec 6 11:22:58 2016 GabrieleElectronicsConfigurationTrying to debug GPS time issueI swapped the SR signal generator with
an Agilent 33210A. Shut down and restarted
the cymac3. Now the command line GPS and
 Screenshot-3.png 
  231   Tue Dec 6 16:55:51 2016 GabrieleElectronicsConfigurationTrying to debug GPS time issueUpdate at 5pm, GPS times are still in sync.

 Screenshot.png 
  232   Wed Dec 7 08:14:05 2016 GabrieleElectronicsConfigurationTrying to debug GPS time issueUnfortunately, this morning the model time
is again wrong...

 Screenshot-1.png 
  233   Wed Dec 7 08:48:13 2016 GabrieleElectronicsConfigurationAuto center state written directly to dataI modified the autocenter script. Now while
the picomotor is moving, the variable X3:CR1-AUTOCENTER
takes the value 1, otherwise it is 0.
  
  235   Wed Dec 7 16:27:11 2016 GabrieleElectronicsConfigurationTrying to debug GPS time issueI put back the Stanford Reserch signal
generator. On a scope, the timing signal
looks good. There is a small ripple and some
  
  236   Thu Dec 8 09:26:10 2016 GabrieleElectronicsConfigurationTrying to debug GPS time issueFor the last ~day the difference between
the frontend GPS time and the machine GPS
time remained constant between -1 and -2
 figure_1.pngfigure_1.png 
  237   Thu Dec 8 15:32:04 2016 GabrieleElectronicsConfigurationTiming issue: is it a DAC issue?My previous
test showed that the timing drift was
somehow related to the output of the signal
 6x 
  240   Mon Dec 12 14:15:53 2016 GabrieleElectronicsConfigurationTiming issue: is it a DAC issue?I swapped the DAC with another one, but
I see the same behavior in the output signal.
Here's a spectrum of the DAC output,
 dac_spectra.png 
  244   Sat Dec 17 06:29:15 2016 ranaElectronicsConfigurationTiming issue: is it a DAC issue?I find sometimes that the probe configuration
can give these distorted signals. For the
Tektronix probes, its best to use a 500 MHz
  
  254   Wed Jan 4 14:28:03 2017 GabrieleElectronicsConfigurationReal time models for new measurement system
changed the name of the test chamber
real time model from CR1 to CR0. Updated
all MEDM screens and scripts (autocenter.py,
  
  261   Thu Jan 12 10:36:47 2017 GabrieleElectronicsConfigurationAdded ESD bias path to model CR0I added to the model CR0 an additional
bias path for the ESD driver:

 Screenshot.pngScreenshot-Untitled_Window.png 
  275   Tue Jan 24 11:45:55 2017 GabrieleElectronicsConfigurationPicomotor drivers
Changed the library Picomotor8752.py
to add a third axis 'r' that
will allow moving the in-vacuum retaining
  
  283   Tue Jan 31 09:03:12 2017 GabrieleElectronicsConfigurationAuto centering script for the new setupI wrote an autocenter script for the four
QPD in the new setup (autocenter14.py) and
renamed the script for the old chamber (autocenter0.py).
  
  297   Wed Feb 8 17:06:11 2017 Gabriele, LarryElectronicsConfigurationPrivate networkThis morning Larry set up a network switch
to create a local network for the power strip
and the two Newport picomotor controllers.
  
  298   Thu Feb 9 08:35:24 2017 GabrieleElectronicsConfigurationRemoved ESD bias path to model CR0Removed, since iit was not useful to improve
the actuation authority.

  
  299   Thu Feb 9 09:10:17 2017 Gabriele, LarryElectronicsConfigurationPrivate networkI reconfigured the powerstrip and the two
Newport controllers to use static IP address
in the new 10.10.10.X network, using the
  
  301   Thu Feb 9 11:35:27 2017 GabrieleOpticsConfigurationQPD calibration This morning I measured the beam profiles
at the QPD positions. As expected, the beams
are not gaussian there, since we are seeing
 11x 
  314   Wed Feb 22 13:56:15 2017 GabrieleElectronicsConfigurationSoftware improvements
created a single interface to move
the picomotors in front of QPD1 ... QPD4

the
command qpdcenter
  
  405   Thu Aug 10 13:36:08 2017 Gabriele, ZachMechanicsConfigurationESD moved closer to disk in CR0We first measured the distance of the ESD
from the disk in the test chamber (CR0).
We had to remove the retaining ring to have
  
  406   Fri Aug 11 09:22:21 2017 GabrieleMechanicsConfigurationESD moved closer to disk in CR0The plots below compare the SNR and peak
amplitude of all excited modes, in the new
and old configuration. The new confgiuration
 esd_ampl.pngesd_snr.png 
  454   Tue Jan 30 09:19:09 2018 GabrieleOpticsConfigurationSetup for 50mm disksI realigned all optical levers to measure
the 50mm disks. In brief, I moved the input
2" mirrors, the in-vacuum 2" mirrors
  
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