| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
14969
|
Mon Oct 14 17:24:28 2019 |
gautam | Update | General | Workstation computers taken off UPS (temporarily) | The UPS is now incessantly beeping. I cannot
handle this constant sound so I shut down
all the control room workstations and moved |
|
|
14971
|
Tue Oct 15 17:19:38 2019 |
Koji | Update | General | Wednesday cleaning work | [Liz, Gautam, Chub, Jordan, Koji]
We removed a significant
amount of e-waste from the lab. |
|
|
14972
|
Tue Oct 15 17:22:26 2019 |
gautam | Update | General | Workstation computers back on UPS | Batteries + power cables replaced, and
computers back on UPS from today ~3pm.
|
|
|
14975
|
Thu Oct 17 12:34:51 2019 |
gautam | Update | General | Daytime wishlist | Some ideas that would help increase the
locking duty-cycle in the short term.
Seismometer investigation |
|
|
15069
|
Tue Dec 3 22:41:17 2019 |
shruti | Update | General | PLL for PM measurement | I worked on the setup up for the phase
modulation measurement of the X end NPRO
PZT. A previous similar measurement can be |
|
|
15074
|
Wed Dec 4 20:32:43 2019 |
gautam | Update | General | PLL for PM measurement | Were
some cables from the ALS beat setup modified?
I can't see the beat on the scope, and |
|
|
15077
|
Thu Dec 5 14:54:15 2019 |
gautam | Update | General | Symlink to SRmeasure and AGmeasure | I symlinked the SRmeasure and AGmeasure
commands to /usr/bin/ on donatella (as it
is done on pianosa) so that these scripts |
|
|
15088
|
Mon Dec 9 21:22:46 2019 |
shruti | Update | General | PLL / PM measurement of Xend NPRO PZT | In short:
Using the
same setup as before with a LPF changed to
have a cutoff of 5 MHz, the PLL was implemented |
|
|
15101
|
Tue Dec 17 20:08:09 2019 |
shruti | Update | General | PLL / PM measurement of Xend NPRO PZT | 1. Some calculations
For a
Unity Gain Frequency (UGF) of 1 kHz, assumed
PZT response |
|
|
15121
|
Tue Jan 14 20:17:09 2020 |
gautam | Summary | General | IFO recovery | Summary:
There was no light entering the
IFO. I worked on a few things to bring the |
|
|
15123
|
Wed Jan 15 10:04:19 2020 |
gautam | Summary | General | POX / POY locking restored | Single arm locking using POX and POY has
been restored. After running the dither alignment
servos, the TRX/TRY levels are ~0.7. This |
|
|
15128
|
Wed Jan 15 16:54:51 2020 |
gautam | Update | General | PDA10CF removed from AS table | Per Yehonathan's request, I removed
one PDA10CF from a pickoff of REFL on the
AS table (it was being used for the mode |
|
|
15129
|
Thu Jan 16 19:32:23 2020 |
shruti | Update | General | PLL / PM measurement of Xend NPRO PZT | With Gautam's help today the PLL managed
to be be locked for a few brief moments.
Turns out the signal power of the beat was |
|
|
15148
|
Thu Jan 23 20:08:49 2020 |
shruti | Update | General | PLL / PM measurement of Xend NPRO PZT | Setup Update:
-
No more SR 560, upgraded to LB1005
P-I controller. Because: |
|
|
15158
|
Mon Jan 27 14:01:01 2020 |
Jordan | Configuration | General | Repurposed Sorenson Power Supply | The 24 V Sorenson (2nd from bottom) in
the small rack west of 1x2 was repurposed
to 12V 600 mA, and was run to a terminal |
|
|
15169
|
Tue Jan 28 19:40:15 2020 |
shruti | Update | General | PLL / PM measurement of Xend NPRO PZT | Over the past few days, I have been trying
to make measurements of the phase modulation
transfer function by modulating the X end |
|
|
15174
|
Wed Jan 29 12:29:33 2020 |
shruti | Update | General | delay line frequency discriminator for PM | Today I began working on a TF measurement
based on the delay line frequency discriminator
setup in elog |
|
|
15177
|
Thu Jan 30 15:24:10 2020 |
? | Update | General | delay line frequency discriminator for PM | yes, its fine to use this
with a level 3 or level 7 mixer; let's |
|
|
15180
|
Thu Jan 30 22:02:42 2020 |
shruti | Update | General | delay line frequency discriminator for PM | I could not find any level 3 mixers, but
by adjusting the beat frequency the power
in each of the delay line channels rose to |
|
|
15182
|
Fri Jan 31 16:57:09 2020 |
gautam | Update | General | Metal PMC parts | Jon brought over a box of parts for constructing
the metal PMCs. I have stored it along the
Y-arm, on top of the green optics cabinet. |
|
|
15193
|
Thu Feb 6 16:14:44 2020 |
rana | Update | General | office area temperature | I changed the office area thermostate
near Steve's desk from 68F to 73F
today. Please |
|
|
15196
|
Fri Feb 7 02:41:28 2020 |
Koji | Update | General | office area temperature | Not sure what's wrong, but the workstation
desk is freezing cold again and the room
temp is 18degC (64degF). |
|
|
15197
|
Fri Feb 7 09:45:03 2020 |
shruti | Update | General | AM at X end | I took a few AM TF measurements at the
X end for which I:
Misaligned the ITMX (then |
|
|
15198
|
Fri Feb 7 12:58:25 2020 |
Yehonathan | Update | General | Metal PMC parts | I took the metal PMC box and examined its
content and find the following items:
|
18x |
|
15201
|
Mon Feb 10 09:40:54 2020 |
Larry Wallace | Summary | General | SolidWorks Computer Upgrade and Printer repair | On February 5, 2020, the Dell engineering
workstation located in the 40M lab, was
replaced with a newer Engineering workstation, |
|
|
15203
|
Mon Feb 10 15:04:42 2020 |
Jordan | Update | General | HDMI Routing for new tv | Ran HDMI to the new tv mounted on the north
wall of control room. |
|
|
15222
|
Mon Feb 24 08:36:32 2020 |
Chub | Update | General | HVAC repair | The HVAC people replaced a valve and repaired
the pneumatic plumbing on the roof air handler.
Temperature has been stable during the day |
|
|
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 |
|
|
15286
|
Mon Mar 30 19:02:49 2020 |
rana | Update | General | donated cleanroom supplies to Hospitals | Yesterday evening I took nearly all of
the masks, gloves, gowns, alcohol wipes,
hats, and shoe covers. These were the ones |
|
|
15301
|
Mon Apr 13 15:28:07 2020 |
Koji | Update | General | Power Event and recovery | [Larry (on site), Koji
& Gautam (remote)]
Network recovery |
|
|
15303
|
Tue Apr 14 23:50:06 2020 |
Koji | Update | General | 40m power glitch recovery | [Koji / Gautam (Remote)]
Lab
status |
|
|
15308
|
Mon Apr 20 17:49:58 2020 |
gautam | Update | General | Some housekeeping |
Empty
N2 replaced.
Logged back into zita and started |
|
|
15340
|
Wed May 20 19:34:58 2020 |
Koji | Update | General | ITM spares and New PR3 mirrors transported to Downs for phasemap measurement | Two ITM spares (ITMU01/ITMU02) and five
new PR3 mirrors (E1800089 Rev 7-1~Rev7-5)
were transported to Downs for phasemap measurement |
|
|
15344
|
Fri May 22 10:14:47 2020 |
Jordan | Update | General | Nitrogen Replacement | I was in the lab for Clean and Bake activities
and I replaced an empty N2 tank. Left tank
is at 2600 psi right tank at ~1300 psi. |
|
|
15354
|
Tue May 26 10:04:54 2020 |
Jordan | Update | General | N2 Replacement | Replaced empty N2 tank, left tank at ~2000
psi, right tank ~2600 psi. |
|
|
15375
|
Thu Jun 4 08:45:41 2020 |
Jordan | Update | General | Presence at 40m | I will be at the 40m, in the Clean and
bake lab today from ~9am to ~3pm. |
|
|
15378
|
Fri Jun 5 08:44:50 2020 |
Jordan | Update | General | Presence at 40m | I will be at the 40m,
in the Clean and bake lab today from ~9am
to ~3pm. |
|
|
15385
|
Tue Jun 9 09:35:02 2020 |
Jordan | Update | General | Presence at 40m | I will be in the Clean and Bake lab today
from 9:30am to 4pm. |
|
|
15388
|
Wed Jun 10 14:00:33 2020 |
Jordan | Update | General | Presence at 40m | I will be in the Clean and Bake lab from
10am to 4pm today. I will also replace an
empty N2 cylinder. |
|
|
15390
|
Thu Jun 11 11:14:12 2020 |
Jordan | Update | General | Presence at 40m | I will be in the Clean and Bake lab today
from 11am to 4pm. |
|
|
15395
|
Fri Jun 12 11:40:14 2020 |
Jordan | Update | General | Presence at 40m | I will be in the Clean and Bake lab today
from 12pm to 4pm. |
|
|
15400
|
Tue Jun 16 08:58:11 2020 |
Jordan | Update | General | Presence at 40m | I will be at the 40m today at 10am to deliver
optics to Downs and to replace the TP2 controller. |
|
|
15403
|
Tue Jun 16 16:05:26 2020 |
Jordan | Update | General | N2 Replacement | I replaced an empty N2 cylinder, there
are now two empty tanks in the outside rack. |
|
|
15405
|
Thu Jun 18 09:46:03 2020 |
Jordan | Update | General | Presence at 40m | I will be at the 40m today from 9:30am
to 4pm. |
|
|
15414
|
Fri Jun 19 08:47:10 2020 |
Jordan | Update | General | Presence at 40m | I will be at the 40m today from 9am to
3pm. |
|
|
15416
|
Fri Jun 19 11:02:10 2020 |
Chub | Update | General | custom feedthrough flanges are here! | The four 4x25DSUB and single 8x25DSUB feedthrough
flanges have arrived and will be picked up
from the dock and brought to the 40M lab. |
|
|
15420
|
Fri Jun 19 19:21:25 2020 |
gautam | Update | General | PSL shutter re-opened | The PSL shutter was closed from the vacuum
interlock trip. Today, I did the following:
Re-aligned input beam to |
|
|
15422
|
Mon Jun 22 13:16:38 2020 |
Jordan | Update | General | Presence at 40m | I will be at the 40m today from 11am to
4pm. |
|
|
15426
|
Wed Jun 24 10:14:56 2020 |
Jordan | Update | General | Presence at 40m | I will be in the Clean and Bake lab today
from 10am to 4pm. |
|