| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
5946
|
Fri Nov 18 12:11:24 2011 |
Zach | Update | Green Locking | Y end green PDH servo : it's okay |
|
|
|
5956
|
Sat Nov 19 00:47:24 2011 |
Zach | Update | Green Locking | Y-Arm locked with PDH Box #17 | I installed the newly modified PDH |
|
|
5970
|
Mon Nov 21 16:08:04 2011 |
kiwamu | Update | Green Locking | 2nd trial of Y arm ALS noise budget : broad band noise gone |
|
|
|
5978
|
Tue Nov 22 15:18:18 2011 |
kiwamu | Update | Green Locking | broad band noise depends on the gain of Y green PDH. and comaprator broken |
|
|
|
5980
|
Tue Nov 22 18:42:10 2011 |
kiwamu | Summary | Green Locking | Some issues on the Y end green PDH locking | [Rana / Kiwamu]
As
a part of the ALS noise budgeting we took |
|
|
5983
|
Wed Nov 23 00:00:53 2011 |
Zach | Summary | Green Locking | Some issues on the Y end green PDH locking |
|
|
|
5987
|
Wed Nov 23 13:53:36 2011 |
Zach | Update | Green Locking | Sensor noise | The in-loop Y-Arm error signal looks
equal to the beat note noise divided by the
Y-Arm OL gain in the broadband-noise region |
|
|
6018
|
Sat Nov 26 19:07:40 2011 |
kiwamu | Summary | Green Locking | AM trnasfer function of the Y end laser with doublin crystal |
|
|
|
6024
|
Mon Nov 28 15:00:20 2011 |
kiwamu | Update | Green Locking | Y arm ALS engaged |
|
|
|
6076
|
Tue Dec 6 02:57:44 2011 |
kiwamu | Update | Green Locking | 1st trial of handing off | I
succeeded in handing off the servo from that
of the ALS to IR-PDH. |
|
|
6080
|
Wed Dec 7 02:55:38 2011 |
kiwamu | Update | Green Locking | locking activity tonight | No
real progress. |
|
|
6102
|
Sat Dec 10 05:27:43 2011 |
kiwamu | Update | Green Locking | status update of the Y arm green lock | Status
update of the Y arm green lock: |
|
|
6103
|
Sun Dec 11 17:28:36 2011 |
kiwamu | Update | Green Locking | status update of the Y arm green lock |
|
|
|
6120
|
Wed Dec 14 14:40:53 2011 |
steve | Update | Green Locking | delay line bnc cable specs | The existingly used used Pasternack Enterprices
RG58 C/U cable lenght ~ 140 ft and the specs
are here at Atm1 |
|
|
6126
|
Fri Dec 16 13:29:15 2011 |
kiwamu | Update | Green Locking | Y arm noise budget : 60Hz line noise is killing us | Along with development of the automation
script, my goals last night were :
(1) Take |
|
|
6127
|
Sat Dec 17 00:00:03 2011 |
kiwamu | Update | Green Locking | 60 Hz line nose gone |
|
|
|
6133
|
Sun Dec 18 18:45:22 2011 |
kiwamu | Update | Green Locking | Y arm ALS : time series and noise budget | As I said in the previous entry (#6126)
my current goals were : |
|
|
6140
|
Wed Dec 21 03:38:14 2011 |
kiwamu | Update | Green Locking | Y arm ALS : automation script 80 % done | Scripting
of the single arm automated lock script is
80% done. |
|
|
6141
|
Wed Dec 21 04:29:01 2011 |
kiwamu | Update | Green Locking | Power Recycled Single Arm | I made the
first trial of locking a Power-recycled single |
|
|
6144
|
Wed Dec 21 16:55:30 2011 |
kiwamu | Update | Green Locking | Power Recycled Single Arm | I did some brief parameter checks
for the power-recycled single arm which I
have done yesterday.
The |
|
|
6145
|
Thu Dec 22 19:15:22 2011 |
kiwamu | Update | Green Locking | rearrangement of PSL green optics | As
planed (#6143 |
|
|
6147
|
Fri Dec 23 01:07:41 2011 |
kiwamu | Update | Green Locking | rearrangement of PSL green optics part II | After
I did a fine alignment of the X green beam
path on the PSL table, the X arm beat-note |
|
|
6154
|
Wed Dec 28 14:13:16 2011 |
kiwamu | Update | Green Locking | ALS feedback on MC2 | I
added an ALS feedback path on the MC2 suspension
and this path will enable us to stabilise |
|
|
6155
|
Fri Dec 30 02:16:48 2011 |
kiwamu | Update | Green Locking | Yarm ALS : high frequency noise reduced | The
high frequency noise, which has been a dominant
noise above 30 Hz in the Y arm ALS ( |
|
|
6214
|
Fri Jan 20 15:59:02 2012 |
kiwamu | Update | Green Locking | Y arm ALS noige budget | One of
my goals in this week is : measurement of |
|
|
6215
|
Fri Jan 20 16:24:50 2012 |
kiwamu | Update | Green Locking | Y arm ALS : time series | Here is
a new time series plot showing how stably |
|
|
6216
|
Fri Jan 20 17:05:59 2012 |
rana | Update | Green Locking | Y arm ALS : time series |
|
|
|
6220
|
Tue Jan 24 18:11:13 2012 |
kiwamu | Update | Green Locking | Y arm ALS noise budget | I
did some more stuff for the Y arm ALS and
updated the noise budget: |
|
|
6221
|
Wed Jan 25 02:59:46 2012 |
kiwamu | Update | Green Locking | Y arm ALS noise budget | Surprisingly
increasing the gain of the whitening filter
didn't improve the noise curve. |
|
|
6223
|
Wed Jan 25 17:32:03 2012 |
steve | Update | Green Locking | geen pointing into y arm is misaligned | I placed an other Y2-LW-1-2050-UV-45P/AR
steering mirror into the beam path of the
green beam launching in order to avoid the |
|
|
6225
|
Thu Jan 26 06:09:52 2012 |
kiwamu | Update | Green Locking | noisy AS55 | During
the Y arm ALS I found that the noise of the
AS55 demod signal was worse than that of |
|
|
6227
|
Thu Jan 26 10:17:01 2012 |
steve | Update | Green Locking | geen pointing into y arm is realigned |
|
|
|
6230
|
Fri Jan 27 05:21:43 2012 |
kiwamu | Update | Green Locking | fine alignment of the Y end green setup | I did a fine alignment on the Y end green
setup. The green light became able to be
locked again. |
|
|
6234
|
Fri Jan 27 16:55:28 2012 |
Jenne | Update | Green Locking | Y-green realigned | The Yarm green laser really wanted to lock
on a 01/10 mode, so Kiwamu suggested I go
inside and realign the green beam to the |
|
|
6299
|
Tue Feb 21 08:33:16 2012 |
steve | Update | Green Locking | periscope adapter plate | Two extender plates ready for cleaning.
The existing optical table tops have 38"
OD. Using two of these the OD will be 44" |
|
|
6301
|
Tue Feb 21 18:39:11 2012 |
kiwamu | Update | Green Locking | New BBPDs installed | Two new BBPDs have been installed on
the PSL table.
The first one was installed by Koji |
|
|
6324
|
Mon Feb 27 14:35:37 2012 |
Jenne | Update | Green Locking | PSL Beat Setup | Xarm is aligned for both IR and green.
Here is a photo of the beam paths
of the PSL beat setup. I want to make |
|
|
6326
|
Mon Feb 27 18:35:45 2012 |
Jenne | Update | Green Locking | X Beat Search | Meh. I've searched in steps of 20
counts in C1:GCX-SLOW_SERVO2_OFFSET units
(16 bit +\- 10V DAC, and 1GHz/V coeffecient |
|
|
6342
|
Wed Feb 29 20:27:00 2012 |
Jenne | Update | Green Locking | X green beat - found it! | Found it!
The actual temperature of the Xend |
|
|
6371
|
Wed Mar 7 11:44:29 2012 |
Jenne | Update | Green Locking | Xgreen beatnote cable made, laid | The Xgreen PD now has a cable going over
to the beatbox. Once beatbox characterization
is done I can re-find the beat, and we can |
|
|
6395
|
Fri Mar 9 16:00:46 2012 |
steve | Update | Green Locking | laser emergency shut down switch replaced at the south end | Over-sized local laser emergency switch
was held by large C clamp at the south end.
This was replaced by a smaller one and it |
|
|
6413
|
Wed Mar 14 10:06:26 2012 |
steve | Update | Green Locking | dichroic mirror quotes | Dichroic
mirror quotes are in the wiki.
ATF is pricy. |
|
|
6435
|
Thu Mar 22 08:14:21 2012 |
steve | Update | Green Locking | dichroic mirror quotes with large wedge |
|
|
|
6603
|
Fri May 4 17:46:46 2012 |
Jenne | Update | Green Locking | PSL doubling oven back on | While walking past the PSL, I noticed that
the PSL's doubling oven's heater was still
disabled from the power outage. As |
|
|
6713
|
Wed May 30 01:35:15 2012 |
yuta | Update | Green Locking | aligned Y arm green beam | [Jenne, Yuta]
We aligned the Y arm for IR (C1:LSC-TRY_OUT
is now ~ 0.9), and aligned the green beam |
|
|
6724
|
Thu May 31 01:27:16 2012 |
yuta | Update | Green Locking | PSL and Y arm green beams aligned | [Jenne, Yuta]
We aligned the PSL green optics so
that the PSL green beam and Y arm green beam |
|
|
6725
|
Thu May 31 01:36:17 2012 |
yuta | Update | Green Locking | GREEN_TRX/GREEN_TRY PDs | I did the cabling for monitoring DC transmission
of the green beam from the end table.
The two PDs are called GREEN TRX and |
|
|
6731
|
Thu May 31 16:19:07 2012 |
yuta | Update | Green Locking | temperature setting for PSL doubling crystal | I fixed the temperature control of the
oven for the PSL doubling crystal.
The PID settings were not good, and |
|
|
6732
|
Thu May 31 16:54:12 2012 |
Jenne | Update | Green Locking | Links to old elogs for green beatnote laser temps | Because I keep taking a long time to search
for these, since I can't remember the keywords
in the different entries, here are the links: |
|
|
6736
|
Fri Jun 1 02:13:00 2012 |
Jenne | Update | Green Locking | Attempt at Ygreen beat - failed | [Yuta, Jenne]
We tried to find the Ygreen beat
note, with no success yet. We calculate |
|