| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
14731
|
Sun Jul 7 17:54:34 2019 |
Milind | Update | Computer Scripts / Programs | PMC autolocker | I modified the autolocker code I wrote
to read from a .yaml configuration file instead
of commandline arguements (that option still |
|
|
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. |
|
|
3501
|
Wed Sep 1 07:52:27 2010 |
Alberto | Configuration | Electronics | PMC board unplugged, turned on Sorensen switches on 1Y1 rack | Today I put the FSS frequency box back
into the 1Y1 rack.
To power it on, I turned on the 24V |
|
|
3504
|
Wed Sep 1 08:40:28 2010 |
Alberto | Configuration | Electronics | PMC board unplugged, turned on Sorensen switches on 1Y1 rack |
|
|
|
7778
|
Mon Dec 3 17:04:12 2012 |
Ayaka | Update | PSL | PMC calibration for MC_F calibration | In order to calibrate MC_F signal, I need
to know the calibration value from thorlab's
PZT driver to laser frequency. |
|
|
7779
|
Tue Dec 4 01:43:37 2012 |
rana | Update | PSL | PMC calibration for MC_F calibration | If you can't find the PMC sidebands
in the transmission, its because the SNR
is too small. |
|
|
7782
|
Tue Dec 4 11:30:36 2012 |
Zach | Update | PSL | PMC calibration for MC_F calibration | In order to have less unknown, you can
calibrate the PMC PZT separately. Lock the
PMC and take a transfer function from either |
|
|
7823
|
Thu Dec 13 17:24:53 2012 |
Ayaka | Update | PSL | PMC calibration for MC_F calibration | I calibrated MC_F signal into Hz/rtHz
unit using the transfer function from
MC_F to PMC feedback signal. |
6x |
|
304
|
Sat Feb 9 13:05:48 2008 |
John | Summary | IOO | PMC camera/ HEPA | I replaced the Gig-E camera on the PMC trans
beam. The PZT was close to railing and I
wanted to adjust it. I just did a quick job, |
|
|
104
|
Thu Nov 15 04:18:11 2007 |
John | Summary | PSL | PMC cavity pole measurements | In connection with our work on the ISS I attempted
to measure the PMC cavity pole.
|
|
|
15093
|
Wed Dec 11 15:01:57 2019 |
Jon | Summary | PSL | PMC cavity ringdown measurement | [Jon, Yehonathan]
We carried out a set of cavity
ringdown measurements of the PMC. The 1/e |
|
|
15096
|
Thu Dec 12 19:20:43 2019 |
Yehonathan | Update | PSL | PMC cavity ringdown measurement | {Yehonathan, Rana, Jon}
To check whether we laser is being
shut fast enough for the ringdown measurement |
|
|
15097
|
Fri Dec 13 12:28:43 2019 |
Yehonathan | Update | PSL | PMC cavity ringdown measurement | I grab the data we recorded yesterday from
the scope and plot it in normalized units (remove
noise level and divide by maximum). See attachment. |
|
|
15102
|
Tue Dec 17 20:45:30 2019 |
rana | Update | PSL | PMC cavity ringdown measurement | idk - I'm recently worried about the
'thermal self locking' issue we discussed.
I think you should try to measure the linewidth |
|
|
15105
|
Fri Dec 27 15:01:02 2019 |
Yehonathan | Update | PSL | PMC cavity ringdown measurement | I measured PMC ringdowns for several input
powers. I change the input power by changing
the DC voltage to the AOM. |
|
|
15107
|
Tue Dec 31 03:03:02 2019 |
gautam | Update | PSL | PMC cavity ringdown measurement | When I was looking at this, the AOM shutdown
time was measured to be ~120 ns, and while
I wasn't able to do a ringdown measurement |
|
|
15098
|
Mon Dec 16 18:19:42 2019 |
shruti | Update | PSL | PMC cavity ringdown measurement : beat-note disruption | I have removed the PD55 + ND filter attached
to it (see Attachment) and placed it
next to the oscilloscope, after disconnecting |
|
|
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 |
|
|
15143
|
Wed Jan 22 20:12:36 2020 |
gautam | Update | PSL | PMC demodulator electrical characterization | Summary:
The mixer
+ LPF |
|
|
7810
|
Tue Dec 11 11:40:07 2012 |
Manasa, Ayaka | Update | PSL | PMC drift | [Manasa, Ayaka]
I found that MC got unstable this
morning. This is caused by the drift of PMC. |
|
|
1000
|
Fri Sep 26 18:35:17 2008 |
Jenne | Update | PSL | PMC filter is out for tuning | The PMC's new Pomona Box filter is out for
tuning. I'd like to get the notch right
on the 18.3kHz, rather than being off in |
|
|
8263
|
Fri Mar 8 21:00:05 2013 |
Manasa | Update | PSL | PMC fixed |
|
|
|
4870
|
Thu Jun 23 22:39:34 2011 |
Jenne | Update | PSL | PMC found unlocked | I found the PMC unlocked. Koji noticed
that the FSS Slow Actuator Adjust was railed
at the positive end of the slider. |
|
|
5705
|
Wed Oct 19 18:16:53 2011 |
Jenne | Update | PSL | PMC found unlocked | I just relocked the PMC. I don't
know why it was unlocked. |
|
|
5707
|
Wed Oct 19 19:43:16 2011 |
Jenne | Update | PSL | PMC found unlocked |
|
|
|
7811
|
Tue Dec 11 19:51:36 2012 |
Koji | Update | PSL | PMC gain was too low / EPICS alerting value for PMC updated | [Ayaka, Koji]
Ayaka pointed out that the PMC has
too low unity gain frequency. We checked |
|
|
15270
|
Thu Mar 12 11:10:49 2020 |
Yehonathan | Update | General | PMC got unlcoked | Came this morning to find the PMC was unlocked
since 6AM. Laser is still on, but PMC REFL
PD DC shows dead white constant 0V on PMC |
|
|
15271
|
Thu Mar 12 12:44:34 2020 |
gautam | Update | General | PMC got unlcoked | Of course the reboot wiped any logs we
could have used for clues as to what happened.
Next time it'll be good to preserve this |
|
|
1502
|
Mon Apr 20 19:51:51 2009 |
Jenne | Configuration | PSL | PMC has new Level 13 Mixer installed | The new Level 13 mixer on the PMC servo
board is installed (minicircuits SRA-3MH).
Since the RF output of the LO board was ~16dBm, |
|
|
612
|
Tue Jul 1 12:08:38 2008 |
John, Joe | Configuration | PSL | PMC input PD | Joe and I switched cables so that the PMCR
screen actually shows reflection not transmission.
|
|
|
5724
|
Fri Oct 21 15:49:35 2011 |
Suresh | Update | IOO | PMC input alignment improved | The image on the PMCR camera was quite
assymetric and PMC output was at 80% ....
upon improving the alignment I managed to |
|
|
16917
|
Wed Jun 15 15:03:41 2022 |
Koji | Update | PSL | PMC input beam aligned | The commissioners complained about the
PMC alignment. The PMC input beam was aligned.
It made the transmission improved from 0.72 |
|
|
16922
|
Thu Jun 16 15:29:03 2022 |
yuta | Update | PSL | PMC input beam aligned again, IMC | [Paco, Tomislav, Yuta]
Somehow, when we were trying to measure |
|
|
17271
|
Wed Nov 16 11:56:21 2022 |
Radhika | Update | PSL | PMC input beam aligned again, IMC | [Yuta, JC, Radhika]
PMC input beam was aligned again,
bringing transmission from 0.70 to ~0.75. |
|
|
17290
|
Mon Nov 21 09:13:31 2022 |
JC | Update | PSL | PMC input beam aligned again, IMC | [JC, Paco]
I attempted to align PMC Beam from
a transmission of 0.72. I failed to do so |
|
|
17297
|
Tue Nov 22 08:56:27 2022 |
JC | Update | PSL | PMC input beam alignment | [Paco, Anchal, JC]
C1:PSL-PMC_PMCTRANSPD ~ 0.715 this
morning, this was increased to ~0.730. There |
|
|
17316
|
Mon Nov 28 11:21:25 2022 |
JC | Update | PSL | PMC input beam alignment | C1:PSL-PMC_PMCTRANSPD was increased from
0.72 to 0.731 |
|
|
9707
|
Mon Mar 10 12:49:27 2014 |
Jenne | Update | IOO | PMC input pointing misaligned | I don't know why, but as you can see in
Steve's plot from earlier this morning, the
PMC transmission has been going down significantly |
|
|
527
|
Mon Jun 9 17:57:59 2008 |
Yoichi | Configuration | PSL | PMC input power backed to the original | I rotated back the HWP before the PBS to restore
the input laser power to the PMC.
Now the reading of PSL-PMC_PMCTRANSPD is |
|
|
15133
|
Mon Jan 20 12:16:50 2020 |
gautam | Update | PSL | PMC input reverted to AOM zeroth order beam | Summary:
The input beam to the PMC
cavity was changed back to the zeroth order |
|
|
7483
|
Thu Oct 4 22:16:40 2012 |
Den | Update | PSL | PMC is locked | PZT monitor is not lying to us, I've measured
it with a voltmeter. But PMC SERVO is still
interesting. If I break the loop after PMCERR |
|
|
15091
|
Tue Dec 10 15:17:17 2019 |
Yehonathan | Update | PSL | PMC is locked | {Jon, Yehonathan}
We burt-restored the PSL and the
PMC locked immediately. |
|
|
15092
|
Tue Dec 10 18:27:22 2019 |
Yehonathan | Update | PSL | PMC is locked | {Yehonathan, Jon}
We are able to lock the PMC on
the TEM00 mode of the deflected beam. |
|
|
15094
|
Wed Dec 11 15:29:17 2019 |
Yehonathan | Update | PSL | PMC is locked | Make sure
to measure the power drop of the beam downstream |
|
|
7895
|
Mon Jan 14 09:08:37 2013 |
Steve | Update | PSL | PMC is only ok short term |
The PMC PZT voltage slider
seemed sticky. First it would not do |
|
|
7047
|
Mon Jul 30 09:00:18 2012 |
steve | Update | PSL | PMC is still not fixed | The PMC was locking right the way, but
it's transmission would not go up.
Finally I get it back up by moving the "sticky" |
|
|
7048
|
Mon Jul 30 10:05:29 2012 |
Jenne | Update | PSL | PMC is still not fixed |
|
|
|
10316
|
Fri Aug 1 01:29:55 2014 |
Koji | Update | IOO | PMC issue | - PMC suddenly refused to lock.
- Investigated what's wrong
- Finally, I touched RF Output Adjust |
|
|
17782
|
Tue Aug 15 00:41:17 2023 |
Koji | Update | IOO | PMC issue cont'd | I went down to the IFO hall and checked
the PMC situation. The freq mixer fixed on
the rack 1X1 had BNC-T, so the raw error |
|