| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
14132
|
Fri Aug 3 19:02:11 2018 |
gautam | Update | ASS | X arm ASS recovery | [koji,
gautam]
After I effected the series resistance |
|
|
14161
|
Tue Aug 14 00:50:32 2018 |
gautam | Update | ASS | X arm ASS still not quite right? | While working on the single arm alignment,
I noticed that today, i was able to get the
X arm transmission back to ~1.22, and the |
|
|
10865
|
Wed Jan 7 11:20:22 2015 |
Steve | Update | LSC | X arm T-QPD gets SM1 thread adapter | C1:SUS-ETMX_QPD is removed and internal
SM1 thread adapter epoxied into position
as it is at |
|
|
9594
|
Tue Feb 4 00:42:18 2014 |
Koji | Update | General | X arm aligned for IR/GR | The
X arm was also aligned for the IR by hand
and ASS. Also the X end green PZT was aligned |
|
|
6849
|
Thu Jun 21 15:36:51 2012 |
yuta | Update | Locking | X arm alignment | I aligned X arm so that the beam spot comes
roughly on the center.
|
|
|
4278
|
Sun Feb 13 15:02:23 2011 |
kiwamu | Update | Green Locking | X arm beam offcentering has been measured | The amounts
of the X arm's beam off-centering have been |
|
|
8820
|
Wed Jul 10 11:27:02 2013 |
manasa | Update | Green Locking | X arm beatnote found | I found the beat note for X arm. I did
not change anything this morning (to the
best of my knowledge). Hooking up the spectrum |
|
|
8296
|
Thu Mar 14 17:31:57 2013 |
Manasa | Update | Green Locking | X arm green locked in TEM00 |
|
|
|
8298
|
Fri Mar 15 01:57:02 2013 |
Jenne | Update | Green Locking | X arm green locked in TEM00 | This work earlier today had required moving
the harmonic separator back closer to its
original position, so that the green could |
|
|
9233
|
Fri Oct 11 00:37:23 2013 |
manasa | Update | Green Locking | X arm green locking modes | [Masayuki, Manasa]
We have stabilized the ALS for Y
arm and concluded that although the PDH servo |
|
|
12478
|
Thu Sep 8 22:12:36 2016 |
gautam | Update | SUS | X arm in place, locked to green, IR flashes visible | Detailed elog to follow but summary of
todays activities:
ITMX and ETMX are back |
|
|
11111
|
Fri Mar 6 14:51:59 2015 |
ericq | Update | General | X arm linewidth, loss | The fit FWHM is 10.444kHz
+-55Hz. |
|
|
4191
|
Mon Jan 24 02:58:46 2011 |
kiwamu | Update | Green Locking | X arm locked ! | I succeeded in |
|
|
4192
|
Mon Jan 24 09:33:08 2011 |
rana | Update | Green Locking | X arm locked ! | Very cool.
But the PLL seems very fishy to me.
The ZP-3MH needs 13 dBm to operate correctly. |
|
|
4193
|
Mon Jan 24 10:19:21 2011 |
Koji | Update | Green Locking | X arm locked ! | Well... The ALS loop is engaged and the
error was suppressed.
So, how is the IR error signal stabilized |
|
|
4153
|
Fri Jan 14 01:55:26 2011 |
kiwamu | Update | LSC | X arm locked with C1LSC digital control | [Koji, Kiwamu]
|
|
|
4156
|
Fri Jan 14 12:34:08 2011 |
Koji | Update | LSC | X arm locked with C1LSC digital control | My feeling was that the saturation was
caused by the LSC whitening filter which
was always on. |
|
|
5360
|
Wed Sep 7 17:28:41 2011 |
kiwamu | Update | LSC | X arm loss measurement : not good | The measurement
itself wasn't good. |
|
|
14552
|
Thu Apr 18 23:10:12 2019 |
gautam | Update | Loss Measurement | X arm misaligned | Yehonathan wanted to take some measurements
for loss determination. I misaligned the
X arm completely and we installed a PD on |
|
|
6859
|
Sat Jun 23 02:29:18 2012 |
yuta | Update | Green Locking | X arm mode scan results | X
arm finesse is 416 +/- 6, mode-matching ratio
is 91.2 +/- 0.3% |
|
|
10680
|
Thu Nov 6 12:53:09 2014 |
diego | Update | ASC | X arm restored | [Diego, Koji]
X arm has been restored, after modifying
the two parameters mentioned in http://nodus.ligo.caltech.edu:8080/40m/10676 |
|
|
12474
|
Tue Sep 6 20:45:14 2016 |
gautam | Update | SUS | X arm test masses back in chamber | [Teng, Johannes,
Lydia, gautam]
The |
|
|
10702
|
Wed Nov 12 15:14:09 2014 |
manasa | Update | General | X end AUX laser fiber setup | I looked at the endtable for possible
space to setup optics in order to couple
the X end laser into a PM fiber. |
|
|
10831
|
Mon Dec 22 17:06:14 2014 |
manasa | Update | General | X end AUX laser fiber setup |
|
|
|
10834
|
Tue Dec 23 13:18:37 2014 |
manasa | Update | General | X end AUX laser fiber setup |
|
|
|
12526
|
Fri Sep 30 19:53:07 2016 |
gautam | Update | endtable upgrade | X end IR pickoff fiber coupled | [johannes, gautam]
Today we re-installed the fiber
coupler on the X-endtable to couple some |
|
|
9455
|
Thu Dec 12 00:21:04 2013 |
Koji | Update | Green Locking | X end PDH box oscillation issue solved (Re: screwed up the end PDH box) | What
a such long pain we suffered.
After more than three years from |
|
|
4297
|
Tue Feb 15 06:59:57 2011 |
Suresh, Jenne | Omnistructure | General | X end enclosure left open | [Jenne, Suresh]
Jenne found the X-end table
enclosure had been left open. She replaced |
|
|
10730
|
Fri Nov 21 11:41:24 2014 |
manasa | Update | General | X end fiber insulated and on cable tray |
|
|
|
10739
|
Mon Dec 1 15:41:38 2014 |
Steve | Update | General | X end fiber insulated and on cable tray |
|
|
|
7274
|
Fri Aug 24 21:00:40 2012 |
Koji | Update | LSC | X end green investigation | I checked and fixed the X end green situation.
Now
the X green beam is locked with TEM00. |
|
|
10873
|
Wed Jan 7 19:49:09 2015 |
manasa | Update | General | X end space issues | I have attached a photo of the ETMX table.
The path of the 1064nm light rejected after
the doubler and the green light are indicated |
|
|
10955
|
Thu Jan 29 10:14:21 2015 |
manasa | Update | General | X end space issues | It is certain that we have space issues
at the X end that has been preventing us
from sticking in a lens to couple light into |
|
|
12056
|
Wed Mar 30 17:38:52 2016 |
gautam | Update | endtable upgrade | X end table proposed layout | Attachment 1: This
is a photo of the current X end table optical
layout with the beampaths of the various |
|
|
10457
|
Fri Sep 5 04:07:44 2014 |
ericq | Update | Green Locking | X end uPDH Box Replaced | Just a quick note, plots and data will
come tomorrow:
I grabbed an unused uPDH board from |
|
|
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 |
|
|
10981
|
Thu Feb 5 15:21:25 2015 |
manasa | Update | General | X endtable work | [EricG, Manasa]
We were at the X end today trying
to couple AUX X light into the fiber. |
|
|
10978
|
Wed Feb 4 21:09:43 2015 |
manasa | Update | General | X endtable work scheduled tomorrow | The X end fiber setup will be put together
tomorrow morning. |
|
|
5133
|
Sun Aug 7 14:01:58 2011 |
kiwamu | Update | Green Locking | X green beam re-aligned | [Jenne / Kiwamu]
The |
|
|
5135
|
Sun Aug 7 18:41:12 2011 |
Jenne | Update | Green Locking | X green beam re-aligned |
|
|
|
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 |
|
|
8666
|
Mon Jun 3 21:09:55 2013 |
Manasa | Update | Green Locking | X green beatnote through beatbox | I connected the X green beat PD output
back to the beatbox, did the usual PSL alignment
for green and searched for the beat note |
|
|
10000
|
Wed May 28 17:51:48 2014 |
manasa | Update | LSC | X green broadband PD NOT working |
|
|
|
10001
|
Wed May 28 19:15:38 2014 |
Koji | Update | LSC | X green broadband PD NOT working | If the PD is the suspect, just pull it
from the table and bring it to the PD testing
setup. |
|
|
9996
|
Tue May 27 21:48:31 2014 |
Jenne | Update | LSC | X green broadband PD not working???!? | Grr. I am very frustrated.
After lunch I redid alignment for both X
and Y green systems (Yarm both at the end |
|
|
11473
|
Fri Jul 31 10:36:22 2015 |
Steve | Update | PEM | X seismo station short cable removed |
|
|
|
11475
|
Sat Aug 1 20:46:29 2015 |
Koji | Update | PEM | X seismo station short cable removed | OMG |
|
|
9496
|
Thu Dec 19 19:45:12 2013 |
ericq | Update | Green Locking | X-Arm Green PDH Loop Stuff | With the fixed servo box, I remeasured the
OLTF, the servo, and the low pass filter
between the mixer output and servo input. |
|
|
7171
|
Tue Aug 14 04:53:45 2012 |
Yoichi | Summary | LSC | X-Arm noise spectrum | Yoichi, Rana
Here is the noise spectrum of the
X-arm error signal along with the TRX DC |
|