| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
10885
|
Fri Jan 9 19:18:51 2015 |
Jenne | Update | PSL | PMC realigned | A few hours ago I tweaked up the alignment
to the PMC. It was really bad in pitch,
and the transmission was down to about 0.711. |
|
|
10909
|
Thu Jan 15 19:01:30 2015 |
ericq | Update | PSL | PMC realigned | PMC realigned again... The transmission
was down to 0.70, and the MC was having a
hard time trying to autolock. |
|
|
10913
|
Fri Jan 16 18:09:09 2015 |
Jenne | Update | PSL | PMC autolocker not running? | Have we been running the PMC autolocker
lately? I can't remember, and I
also can't find where it might be running. |
|
|
10950
|
Wed Jan 28 17:32:26 2015 |
Koji | Update | PSL | PMC aligned | PMC aligned.
PMC Trans increased from 0.740
to 0.782 |
|
|
10986
|
Sat Feb 7 13:34:11 2015 |
Koji | Summary | PSL | ISS AOM driver check | I wanted to check the status of the ISS.
The AOM driver response was measured on Friday
night. |
|
|
10988
|
Sun Feb 8 21:54:50 2015 |
rana | Summary | PSL | ISS AOM driver check | This is good
news. It means that the driver probably won't
limit the response of the loop - I expect |
|
|
11127
|
Tue Mar 10 14:47:05 2015 |
manasa | Update | PSL | PMC relocked | PMC was locked in a bad state. FSS slow
actuator adjust was at ~ -0.7 and PZT voltage
at ~45. |
|
|
11141
|
Fri Mar 13 23:49:28 2015 |
rana | Update | PSL | Relaxation Osc and the NPRO Noise eater | Another thought about the mystery PCDRIVE
noise: we've been thinking that it could
be some slow death inside the NPRO, but it |
|
|
11373
|
Wed Jun 24 08:05:43 2015 |
Steve | Update | PSL | laser turned on | The laser went off around 11am yesterday.
It was turned on |
|
|
11560
|
Wed Sep 2 23:50:00 2015 |
rana | Update | PSL | PMC LO dying | Let's order a pair of 35.5 MHz Wenzel
for this guy and package like Rich has done
for the WB low noise oscillators. |
|
|
11739
|
Mon Nov 9 09:27:44 2015 |
Steve | Update | PSL | MC is not happy | I just turned off the PSL enclousure lights.
|
|
|
11756
|
Thu Nov 12 09:41:02 2015 |
Steve | Update | PSL | PMC | The PMC is not happy and the ITMX UL OSEM
is moving too much
|
|
|
11763
|
Fri Nov 13 22:32:54 2015 |
Koji | Summary | PSL | PMC LO degraded, usual ERA-5 replacement, LO recovered | [Yutaro, Koji]
We found that the PMC LO level
was fluctuating in a strage way (it was not |
|
|
11765
|
Sun Nov 15 22:43:48 2015 |
Koji | Summary | PSL | PMC LO degraded, usual ERA-5 replacement, LO recovered | I think the IMC locking was somewhat improved.
Still it is not solid as long time before.
Before the PMC fix (attachment |
|
|
11768
|
Mon Nov 16 19:05:59 2015 |
Koji | Summary | PSL | PMC servo circuit review, follow up measurements | PMC follow up measurements have been done.
The servo circuit was reviewed.
Now the PMC, IMC, X/Y arms are |
|
|
11769
|
Mon Nov 16 21:32:49 2015 |
Koji | Summary | PSL | PMC servo circuit review, follow up measurements | The result of the precise inspection
for the PMC servo board for the 40m was done.
The record, including the |
|
|
11775
|
Tue Nov 17 16:21:10 2015 |
Koji | Summary | PSL | PMC servo circuit review, follow up measurements | I'm still analyzing the open loop TF
data. Here I report some nominal settings
of the PMC servo |
|
|
11780
|
Wed Nov 18 16:51:58 2015 |
Koji | Summary | PSL | PMC servo calibration | Summary
The PMC servo error (MIX OUT MON
on the panel) and actuation (HV OUT MON) |
|
|
11781
|
Wed Nov 18 16:53:17 2015 |
Koji | Summary | PSL | PMC PZT capacitance | The PMC PZT capacitance was measured.
- Turn off the HV supplies. Disconnect
HV OUT cable. |
|
|
11782
|
Wed Nov 18 17:09:22 2015 |
Koji | Summary | PSL | PMC Servo analysis | Summary
The PMC servo was analysed. OLTF
was measured and modeled by ZPK (Attachment |
|
|
11793
|
Fri Nov 20 15:44:12 2015 |
Koji | Summary | PSL | Added 17.5kHz LPF to the PMC servo | As a final tune of the PMC servo, I've
added 1nF cap at the error signal amplification
stage. The diagram has been updated and uploaded |
|
|
11900
|
Wed Dec 23 15:43:02 2015 |
rana | Summary | PSL | PMC FSS IMC RF summing box | The EOM upstream of the PMC is used as
the phase corrector for the FSS/IMC servo.
It is also used to apply the 35.5 MHz PDH |
|
|
12169
|
Fri Jun 10 18:16:59 2016 |
varun | Update | PSL | Realignment of pre mode cleaner | The mode cleaner was misaligned probably
due to the earthquake (the drop in the
MC transmitted value slightly after utc 7:38:52 |
|
|
12170
|
Mon Jun 13 09:08:17 2016 |
Steve | Update | PSL | PMC slow drift | The PMC transmission slow degration or
it's input beam is not stable.
|
|
|
12192
|
Thu Jun 16 18:08:57 2016 |
Johannes | Update | PSL | Before the AOM installation | There was only one razor blade beam dump
labeled for atmospheric use left, but that's
all we need. Steve is working on restocking. |
|
|
12196
|
Fri Jun 17 22:36:11 2016 |
Johannes | Update | PSL | AOM installation | Subham and I have placed the AOM back into
the setup right in front of the PMC.
Steps undertaken: |
|
|
12198
|
Mon Jun 20 08:26:56 2016 |
Steve | Update | PSL | AOM pictures | Good job Johannes and Subham.
|
|
|
12573
|
Wed Oct 19 18:32:25 2016 |
rana, yinzi | Update | PSL | RefCav thermal control: heater is dead | We wanted to re-activate the Heater for
the reference cavity today to use it as a
testbed for PID autotuning and the new heater |
|
|
12627
|
Fri Nov 18 17:52:42 2016 |
gautam | Update | PSL | FSS Slow control -> Python, WFS re-engaged | [yinzi, craig, gautam]
Yinzi had translated the Perl PID
script used to implement the discrete-time |
|
|
12628
|
Sun Nov 20 23:53:38 2016 |
awade | Update | PSL | FSS Slow control -> Python, WFS re-engaged | I made a very slighly updated version of
Yinzi's script that pulls the channel
names and actuator hardstop limits from |
|
|
12792
|
Thu Feb 2 18:32:51 2017 |
rana | Summary | PSL | PMC alignment | Re-aligned the beam going into the PMC
today around 5 PM. I noticed that its all
in pitch and since I moved both of the mirrors |
|
|
12911
|
Mon Mar 27 20:41:21 2017 |
rana, gautam | Update | PSL | PMC DAQ assay for feed-forward integration | We are thinking to use the PMC signals
to help us in figuring out the feedback /
feedforward stuff and making it better. |
|
|
12916
|
Wed Mar 29 11:41:19 2017 |
gautam | Update | PSL | PMC DAQ assay for feed-forward integration | The C1IOO frontend machine that resides
in 1X1/1X2 has 2 ADCs, ADC0 and ADC1. The
latter has 28 out of 32 channels unused at |
|
|
12918
|
Thu Mar 30 00:16:09 2017 |
gautam | Update | PSL | PSL NPRO PZT calibration | As part of the ongoing effort to try and
calibrate the PMC DAQ channels into physical
units, I tried to get a calibration for the |
|
|
12920
|
Thu Mar 30 18:11:01 2017 |
rana | Update | PSL | PMC DAQ assay for feed-forward integration | What you have drawn looks good to me: the
cut should be between TP3 and pin3 of the
AD620. This should maintain the DC coupled |
|
|
12925
|
Mon Apr 3 17:25:13 2017 |
gautam | Update | PSL | PSL NPRO PZT calibration | Summary:
By sweeping the laser frequency
and looking at the PMC PDH error signal, |
|
|
12926
|
Mon Apr 3 23:07:09 2017 |
gautam | Update | PSL | PMC DAQ assay for feed-forward integration | I made some changes to the DAQ path on
the PMC servo board, as per the plan posted
earlier in this thread. Summary of changes: |
|
|
12928
|
Tue Apr 4 17:27:58 2017 |
rana | Update | PSL | PSL NPRO PZT calibration | good cal. I wonder if this data also gives
us a good measurement of the cavity pole
or if the photo-thermal self-locking effect |
|
|
12939
|
Tue Apr 11 00:38:37 2017 |
gautam | Update | PSL | PMC demod moved off servo board | As discussed at the Wednesday meeting last
week, I tried moving the demodulation of
the PMC error signal off the PMC servo board, |
|
|
12940
|
Wed Apr 12 00:36:53 2017 |
gautam | Update | PSL | PMC demod moved off servo board | Here is a more detailed comparison of the
spectra of the signals at the front panel
DAQ LEMO output, measured with the Agilent |
|
|
12944
|
Tue Apr 18 01:01:03 2017 |
gautam | Update | PSL | PMC OLTF measured, DAQ channels calibrated | Quick entry, details to follow in the AM
tomorrow.
I calibrated the PMC DAQ |
|
|
12945
|
Tue Apr 18 16:10:00 2017 |
gautam | Update | PSL | PMC OLTF measured, DAQ channels calibrated | Here are the details:
PMC OLTF:
the
procedure used was identical to what Koji |
|
|
12946
|
Tue Apr 18 23:37:15 2017 |
rana | Update | PSL | PMC OLTF measured, DAQ channels calibrated | What's
the reasoning behind setting the the gain |
|
|
12947
|
Wed Apr 19 15:13:30 2017 |
gautam | Update | PSL | PMC/MCL multicoherence | I used a one hour stretch of data from
last night to look at coherence between the
PMC control signal and MCL, to see if the |
|
|
13137
|
Mon Jul 24 12:00:21 2017 |
gautam | Update | PSL | PSL NPRO mysteriously shut off | Summary:
At around 10:30AM |
|
|
13213
|
Wed Aug 16 14:57:01 2017 |
Steve | Update | PSL | ref Cavity heating blanket power supply | The last entry I found relating to ref
cavity was
2011 Aug 19 |
|
|
13223
|
Thu Aug 17 08:42:27 2017 |
Steve | Update | PSL | PSL HEPA | The PSL HEPA was running noisy at 100V
The bearing is wearing out. I turned it down
to 30V It is quiet there. |
|
|
13264
|
Mon Aug 28 23:22:56 2017 |
johannes | Update | PSL | PSL table auxiliary NPRO | I moved the axuiliary NPRO to the PSL table
today and started setting up the optics.
The Faraday Isolator was showing |
|
|
13270
|
Tue Aug 29 20:04:09 2017 |
rana | Update | PSL | PSL table auxiliary NPRO | I don't understand why the 1st order
diffracted beam doesn't go to zero when
you shut off the drive. My guess is that |
|
|
13271
|
Tue Aug 29 21:36:59 2017 |
johannes | Update | PSL | PSL table auxiliary NPRO |
|
|