| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
12063
|
Tue Apr 5 11:42:17 2016 |
gaericqutam | Update | endtable upgrade | TABLE REMOVAL | There is currently no table at
the X end!
We have moved the vast majority |
|
|
12064
|
Tue Apr 5 14:16:34 2016 |
gautam | Update | CDS | BLRMS for optics suspensions - library block UPDATED | As discussed in a Wednesday meeting some
time ago, we don't need to be writing
channels from BLRMS filter modules to frames |
|
|
12065
|
Wed Apr 6 17:52:21 2016 |
gautam | Update | endtable upgrade | First contact cleaning commenced | I've begun cleaning the optics that
will eventually go back onto the newly installed
X-endtable. We decided that First Contact |
|
|
12066
|
Thu Apr 7 12:51:24 2016 |
gautam | Update | endtable upgrade | Beam height differences | Steve has finished installing the enclosure
on the new endtable. So Eric and I decided
to try and lock the X arm and measure the |
|
|
12067
|
Thu Apr 7 14:30:58 2016 |
Steve | Update | endtable upgrade | ETMX table height |
|
|
|
12068
|
Fri Apr 8 09:13:20 2016 |
Steve | Update | endtable upgrade | ETMX-T beam height | X arm resonating after alignment, beam
height on ETMX optical table ~4.75"
|
|
|
12069
|
Mon Apr 11 16:06:30 2016 |
ericq | Update | LSC | DRFPMI Data Archived | I have copied over the complete frame files
from two DRFPMI lock acquisitions + locks to
/frames/archive |
|
|
12070
|
Mon Apr 11 17:03:41 2016 |
Steve | Update | Calibration-Repair | 1W Innolight repair completed | The laser is back. Test report is in the
40m wiki as New Pump Diode Mephisto 1000 |
|
|
12071
|
Tue Apr 12 09:14:57 2016 |
Steve | Update | SUS | Ruby wire - v - groove cut pictures | The
ruby wire standoff V groove cuts are
looking good. |
|
|
12072
|
Tue Apr 12 22:41:00 2016 |
Koji | Update | IOO | PMC/IMC aligned, WFS offset adjusted | Did it again.
PMC Trans ~0.739
IMC Trans ~15000 |
|
|
12073
|
Wed Apr 13 00:56:07 2016 |
gautam | Update | endtable upgrade | X endtable repopulation | Over the last couple of days, I've
been working on restoring the optical layout
on the X-endtable. Some notes about the status |
|
|
12074
|
Wed Apr 13 11:00:28 2016 |
Steve | Update | endtable upgrade | X endtable repopulation | ETMX optical table is grounded to ETMX
chamber through 1 Mohms
The doubling oven temp controller |
|
|
12075
|
Wed Apr 13 18:25:07 2016 |
gautam | Update | endtable upgrade | Lightwave health check | [Koji,gautam]
Lightwave NPRO information:
Model: 126-1064-700 |
|
|
12076
|
Thu Apr 14 17:30:18 2016 |
ericq | Update | General | PLL measurement ongoing | Just a heads up that some equipment is
hooked up at the PSL table for the repaired
AUX laser PLL measurement, I plan to continue |
|
|
12077
|
Fri Apr 15 03:02:44 2016 |
ericq | Update | General | New AUX laser measurements | The free running PSL+AUX beat frequency
noise spectrum has been measured via PLL.
AUX laser PZT PM and AM responses were measured |
|
|
12078
|
Fri Apr 15 18:35:57 2016 |
gautam | Update | General | New AUX laser measurements | I've performed the temperature sweep
of PSL vs Innolight 1W AUX laser.
I followed the procedure |
|
|
12079
|
Fri Apr 15 18:38:12 2016 |
gautam | Update | endtable upgrade | Lightwave health check - NO IMPROVEMENT | I re-measured the power levels today.
We have ~205mW out of the NPRO,
and ~190mW after the Faraday. It doesn't |
|
|
12080
|
Fri Apr 15 23:11:49 2016 |
gautam | Update | General | Innolight 1W moved to SP table | I
have moved the 1W Innolight + controller
from the PSL table to the SP table for beam |
|
|
12081
|
Mon Apr 18 00:29:00 2016 |
gautam | Update | General | Beam profiling + injection current scan | Summary
I've finished up the remaining
characterization of the repaired 1W Innolight |
6x |
|
12082
|
Tue Apr 19 10:58:53 2016 |
Steve | Update | safety | safety scans at PSL & tables | The PSL had one 1064 nm beam to be blocked
around the north east side. The end enclosures
are fine. |
|
|
12083
|
Tue Apr 19 18:37:29 2016 |
gautam | Update | endtable upgrade | Laser swap + optical layout | Summary of work done over the last
two days
Lightwave NPRO |
|
|
12084
|
Wed Apr 20 14:36:45 2016 |
Steve | Update | PEM | dusty lab | It is worth wiping table top covers. Use
isopropanol soaked lint free wipes.
|
|
|
12085
|
Thu Apr 21 14:25:52 2016 |
gautam | Update | endtable upgrade | Green light recovered | I've made progress on the new layout
up to the doubling oven. After doing the
coarse alignment with the diode current to |
|
|
12086
|
Thu Apr 21 15:12:38 2016 |
Steve | Update | VAC | RGA is not working |
|
|
|
12087
|
Fri Apr 22 13:58:13 2016 |
Steve | Update | PEM | leaky roof is fixed | Dan sealed the leak today.
|
|
|
12088
|
Mon Apr 25 11:07:06 2016 |
Steve | Update | SUS | spare SOS tower | Earth quake stops need viton tips.
Wirestandoffs are still aluminum. |
|
|
12089
|
Tue Apr 26 15:22:35 2016 |
Steve | Update | endtable upgrade | Cleaning ETMX vacuum dirty window | Gautom is progressing with the layout nicely.
The X-arm transmission window have not seen
cleaning for decades. This should be the |
|
|
12090
|
Tue Apr 26 23:19:42 2016 |
gautam | Update | endtable upgrade | Green aligned to arm - high order mode flashes seen | Attachment #1
Layout as of today. Most of the
green path is done. The Green REFL PD + PZT |
|
|
12091
|
Wed Apr 27 09:05:10 2016 |
Steve | Update | General | AP viewport |
Sad situation |
|
|
12092
|
Wed Apr 27 09:45:56 2016 |
rana | Update | SUS | spare SOS tower | Bah, we need ruby slippers for all future
suspensions. Prism with curved backside and
smooth grooves. |
|
|
12094
|
Wed Apr 27 15:04:47 2016 |
Steve | Update | endtable upgrade | Cleaning ETMX vacuum dirty window | It looks very promising.
|
|
|
12095
|
Thu Apr 28 00:41:08 2016 |
gautam | Update | endtable upgrade | more progress - Transmon PD installed | The IR Transmon system is almost completely
laid out, only the QPD remains to be installed.
Some notes: |
|
|
12096
|
Thu Apr 28 08:49:47 2016 |
Steve | Update | PEM | possible noise sources schedule |
Building:
Campus (see attached Map)
|
|
|
12097
|
Thu Apr 28 15:23:11 2016 |
ericq | Update | LSC | Green PDH demod lowpass | The 2F product out of the mixer is a natural
concern when demodulating. However, I think
this isn't so big of a deal in our green |
|
|
12098
|
Thu Apr 28 18:53:05 2016 |
rana | Update | LSC | Green PDH demod lowpass | OK - but give us a circuit diagram and
the expected before/after loop plots. Got
to make sure we keep the right impedance |
|
|
12099
|
Fri Apr 29 00:55:46 2016 |
gautam | Update | endtable upgrade | green PDH locked to Xarm | Using the modulation frequency suggested
here,
I hooked up the PDH setup at the X-end and |
|
|
12100
|
Fri Apr 29 16:05:23 2016 |
gautam | Update | endtable upgrade | Cleaning ETMX vacuum dirty window | After a second round of F.C. application,
I think the window is clean enough and there
are no residual F.C. pieces anywhere near |
|
|
12101
|
Fri Apr 29 16:13:36 2016 |
ericq | Update | LSC | Green PDH demod lowpass | We can get
as much, if not more, attenuation of the
1F line in the mixer output that we get from |
|
|
12103
|
Mon May 2 17:11:55 2016 |
rana | Update | COC | RC folding mirrors | Antonio/Gautam
are now developing a more up to date Finesse
model of our recycling cavities to see what |
|
|
12104
|
Mon May 2 19:14:18 2016 |
gautam | Update | endtable upgrade | Optical layout almost complete | With Steve's help, I installed the
Oplev earlier today. I adjusted the positions
of the two lenses until I deemed the spot |
|
|
12105
|
Thu May 5 03:05:37 2016 |
gautam | Update | endtable upgrade | ALS status update | [ericQ, gautam]
Today we spent some time looking
into the PDH situation at the X end. A summary |
|
|
12106
|
Thu May 5 04:05:03 2016 |
ericq | Update | LSC | Aux X PDH checks | We took an OLG measurement of the green
PDH loop. It seems consistent with past measurements.
I've added a trace for the the post-mixer |
|
|
12107
|
Thu May 5 14:03:52 2016 |
ericq | Update | LSC | Further Aux X PDH tweaks | This morning I poked around with the green
layout a bit. I found that the iris immediately
preceding the viewport was clipping the ingoing |
|
|
12108
|
Thu May 5 14:05:01 2016 |
rana | Update | endtable upgrade | ALS status update | All seems very fishy. Its not good to put
attenuators and filters in nilly-willy.
Once the post-PD bandpass |
|
|
12109
|
Thu May 5 21:28:44 2016 |
gautam | Update | endtable upgrade | Innolight PZT capacitance | I suggested
in an earlier elog that after the repair |
|
|
12110
|
Fri May 6 16:42:12 2016 |
ericq | Update | LSC | Green PDH demod lowpass | I've build the filter, and it seems
to have the desired TF shape.
|
|
|
12111
|
Fri May 6 19:08:52 2016 |
rana | Update | LSC | Green PDH demod lowpass | Seems weird to design a PD lowpass with
a corner at the modulation frequency. Recall
what our strategy is with the other photodetectors |
|
|
12112
|
Sat May 7 09:40:40 2016 |
ericq | Update | LSC | Green PDH demod lowpass | As I was looking at filter designs, it
seemed difficult to get 40dB of supression
at 2F with a bandpass without going to a |
|
|
12113
|
Sun May 8 08:39:21 2016 |
rana | Update | LSC | Green PDH demod lowpass | Indeed. This is why the LSC PDs have a
2f notch in addition to the 1f resonance.
In recent versions, we also put a 2f notch |
|
|
12114
|
Tue May 10 03:44:59 2016 |
ericq | Update | LSC | Relocked | ALSX noise is solidly within past acceptable
performance levels. The DRFPMI was locked
on four out of six attempts. |
|