| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
14389
|
Tue Jan 8 10:27:27 2019 |
gautam | Update | General | Near-term in-chamber work | Here is a list of tasks I think we should
prioritize for the next two weeks. The idea
is to get back to the previous state of being |
|
|
14390
|
Tue Jan 8 19:13:39 2019 |
Jon | Update | Upgrade | Ready for pumpdown tomorrow | Everything is set for a second pumpdown
tomorrow. We'll plan to start pumping
after the 1pm meeting. Since the main volume |
|
|
14391
|
Wed Jan 9 11:07:09 2019 |
gautam | Update | VAC | New Vac channel logging | Looks like I didn't restart all the
daqd processes last night, so the data was
not in fact being recorded to frames. I just |
|
|
14392
|
Wed Jan 9 11:33:35 2019 |
gautam | Update | CDS | Timing issues still persist | Summary:
The gps time mismatch between /proc/gps
and gpstime seems to be resolved. However, |
|
|
14393
|
Wed Jan 9 20:01:25 2019 |
Jon | Update | VAC | Second pumpdown completed | [Jon, Koji, Chub, Gautam]
Summary
The
second pumpdown with the new vacuum system |
|
|
14394
|
Thu Jan 10 10:23:46 2019 |
gautam | Update | VAC | overnight leak rate | Overnight, the pressure increased from
247 uTorr to 264 uTorr over a period of 30000
seconds. Assuming an IFO volume of 33,000 |
|
|
14395
|
Thu Jan 10 11:32:40 2019 |
Chub | Update | VAC | Manual valve interfaced with CDS | Connected the manual gate valve status
indicator to the Acromag box this morning.
Labeled the temporary cable (a 50' 9p |
|
|
14396
|
Thu Jan 10 19:59:08 2019 |
Jon | Update | VAC | Vac System Running Normally on Turbo Pumps | [Jon, Gautam, Chub]
Summary
We continued
the pumpdown of the IFO today. The main volume |
|
|
14397
|
Fri Jan 11 16:38:57 2019 |
gautam | Update | General | Some alignment checks | The pumpdown seems to be progressing smoothly,
so I think we are going to stick with the
plan decided on Wednesday, and vent the IFO |
|
|
14398
|
Mon Jan 14 10:06:53 2019 |
gautam | Update | VAC | Vent 82 complete | [chub, gautam]
IFO pressure was ~2e-4 |
|
|
14399
|
Tue Jan 15 10:52:38 2019 |
gautam | Update | SUS | EY door opened | [chub, bob, gautam]
We took the heavy door off the
EY chamber at ~930am. |
|
|
14400
|
Tue Jan 15 15:27:36 2019 |
gautam | Update | General | Lasers and other stuff turned back on | VEA is now a laser hazard area
as usual, several 1064nm lasers
in the lab have been turned back on. Apart |
|
|
14401
|
Tue Jan 15 15:49:47 2019 |
gautam | Update | SUS | EY door opened | While restoring OSEMs on ETMY, I noticed
that the open voltages for the UR and LL
OSEMs had significantly (>30%) changed |
|
|
14402
|
Tue Jan 15 18:16:00 2019 |
gautam | Update | Optical Levers | ETMY Oplev HeNe needs replacement | Perhaps the ETMY Oplev HeNe is also giving
up - the power has fallen by ~30% over 1
year (Attachment #2), nearly twice as much |
|
|
14403
|
Wed Jan 16 16:25:25 2019 |
gautam | Update | SUS | Yarm locked | [chub, gautam]
Summary:
Y arm was locked at low power in |
|
|
14404
|
Fri Jan 18 12:52:07 2019 |
gautam | Update | Optical Levers | BS/PRM Oplev HeNe replaced | I replaced the BS/PRM Oplev HeNe with one
of the heads from the SP table where Steve
was setting up the OL RIN/pointing noise |
|
|
14405
|
Fri Jan 18 15:34:37 2019 |
gautam | Update | Thermal Compensation | Elliptical reflector part number | Nobody documented this, but here is the
part number with mechanical drawings of the
elliptical reflector installed at EY: |
|
|
14406
|
Fri Jan 18 17:44:14 2019 |
gautam | Update | VAC | Pumping on RGA volume | Steve came by the lab today, and looked
at the status of the upgraded vacuum system.
He recommended pumping on the RGA volume, |
|
|
14407
|
Fri Jan 18 21:34:18 2019 |
gautam | Update | SUS | Unused optic on EY table | Does anyone know what the purpose of the
indicated optic in Attachment #1 is? |
|
|
14408
|
Sat Jan 19 05:07:45 2019 |
Koji | Update | SUS | Unused optic on EY table | I don't think it was used. It is not
on the diagram too. You can remove it. |
|
|
14409
|
Sat Jan 19 15:33:18 2019 |
gautam | Update | SUS | ETMY OSEMs faulty | After diagnosis with the tester box, as
I suspected, the fully open DC voltages on
the two problematic channels, LL and UR, |
|
|
14411
|
Tue Jan 22 20:36:53 2019 |
gautam | Update | SUS | ETMY OSEMs faulty | Short update on latest Satellite box woes.
I checked the resistance
of all 5 OSEM coils on ETMY using a DB25 |
|
|
14412
|
Tue Jan 22 20:45:21 2019 |
gautam | Update | VAC | New N2 setup | The N2 ran out this weekend (again no reminder
email, but I haven't found the time to
setup the Python mailer yet). So all the |
|
|
14413
|
Wed Jan 23 12:39:18 2019 |
gautam | Update | SUS | EY chamber work | While Chub is making new cables for the
EY satellite box...
I removed the unused |
6x |
|
14414
|
Wed Jan 23 18:11:56 2019 |
gautam | Update | Electronics | Ethernet Power Strip IP conflict | For the last week, I noticed that I was
unable to turn the EY chamber illuminator
on using the remote python scripts. This |
|
|
14415
|
Wed Jan 23 23:12:44 2019 |
gautam | Update | SUS | Prep for FC cleaning | In preparation for the FC cleaning, I did
the following:
Set up mini-cleanroom at |
|
|
14416
|
Thu Jan 24 15:32:31 2019 |
gautam | Update | SUS | Y arm cavity side first contact applied | EY:
A clean cart was setup
adjacent to the HEPA-enclosed mini cleanroom |
|
|
14417
|
Thu Jan 24 22:55:50 2019 |
gautam | Update | Electronics | Satellite box S/N 102 investigation | I had taken Satellite box S/N 102, from
the SRM suspension, down to the Y-end as
part of debugging. However, at some point, |
|
|
14418
|
Fri Jan 25 12:49:53 2019 |
gautam | Update | Electronics | Ethernet Power Strip IP conflict resolved | To avoid the annoying excercise of having
to manually toggle the illuminators, I solved
the IP conflict. Made a wiki |
|
|
14419
|
Fri Jan 25 16:14:51 2019 |
gautam | Update | VAC | Vacuum interlock code, N2 warning | I reset the remote of this git repo to
the 40m version instead of Jon's personal
one, to ensure consistency between what's |
|
|
14420
|
Tue Jan 29 16:12:21 2019 |
Chub | Update | | | The foam in the cable tray wall passage
had been falling on the floor in little bite-sized
pieces, so I investigated and found a fiber |
|
|
14421
|
Tue Jan 29 17:19:16 2019 |
gautam | Update | Electronics | Satellite box S/N 105 repaired | [chub,
koji, gautam]
|
|
|
14422
|
Tue Jan 29 22:12:40 2019 |
gautam | Update | SUS | Alignment prep | Since we may want to close up tomorrow,
I did the following prep work:
Cleaned up Y-end suspension |
|
|
14423
|
Wed Jan 30 11:54:24 2019 |
gautam | Update | SUS | More alignment prep | [chub,
gautam]
ETMY cage was wiped down
Targeted |
|
|
14424
|
Wed Jan 30 19:25:40 2019 |
gautam | Update | SUS | Xarm cavity alignment | Squishing cables at the ITMX satellite
box seems to have fixed the wandering ITM
that I observed yesterday - the sooner we |
|
|
14425
|
Fri Feb 1 01:24:06 2019 |
gautam | Update | SUS | Almost ready for pumpdown tomorrow | [koji, chub, jon, rana, gautam]
Full story tomorrow, but we went
through most of the required pre close-up |
|
|
14426
|
Fri Feb 1 13:16:50 2019 |
gautam | Update | SUS | Pumpdown 83 underway | [chub, bob, gautam]
Steps described in previous
elog were carried out
EY heavy |
|
|
14427
|
Fri Feb 1 14:44:14 2019 |
gautam | Update | SUS | Y arm FC cleaning and reinstall | [Attachment
#1]: ITMY HR face |
|
|
14428
|
Fri Feb 1 21:52:57 2019 |
gautam | Update | SUS | Pumpdown 83 underway | [jon, koji, gautam]
IFO is at ~1 mtorr, but
pressure is slowly rising because of outgassing |
|
|
14429
|
Sat Feb 2 21:53:24 2019 |
Koji | Update | VAC | overnight leak rate | The pressure of the main volume increased
from ~1mtorr to 50mtorr for the past 24 hours
(86ksec). This rate is about x1000 of the |
|
|
14430
|
Sun Feb 3 15:15:21 2019 |
gautam | Update | VAC | overnight leak rate | I looked into this a bit today. Did a walkthrough
of the lab, didn't hear any obvious hissing
(makes sense, that presumably would signal |
|
|
14431
|
Sun Feb 3 20:52:34 2019 |
Koji | Update | VAC | overnight leak rate | We can pump down (or vent) annuli. If this
is the leak between the main volume and the
annuli, we will be able to see the effect |
|
|
14432
|
Mon Feb 4 12:23:24 2019 |
gautam | Update | VAC | pumpdown 83 - leak tests | [koji, gautam]
As planned, we valved off the main
volume and the annuli from the turbo-pumps |
|
|
14433
|
Mon Feb 4 20:13:39 2019 |
gautam | Update | SUS | ETMY suspension oddness | I looked at the free-swinging sensor data
from two nights ago, and am struggling with
the interpretation. |
|
|
14434
|
Tue Feb 5 10:11:30 2019 |
gautam | Update | VAC | leak tests complete, pumpdown 83 resumed | I guess we forgot to close V5, so we were
indeed pumping on the ITMY and ETMY annuli,
but the other three were isolated suggest |
|
|
14435
|
Tue Feb 5 10:22:03 2019 |
chub | Update | | oil added to RP-1 & 3 | I added lubricating oil to roughing pumps
RP1 and RP3 yesterday and this morning.
Also, I found a nearly full 5 gallon jug |
|
|
14436
|
Tue Feb 5 19:30:14 2019 |
gautam | Update | VAC | Main volume at 20 uTorr | Pumpdown looks healthy, so I'm leaving
the TPs on overnight. At some point, we should
probably get the RGA going again. I don't |
|
|
14437
|
Wed Feb 6 10:07:23 2019 |
Chub | Update | | pre-construction inspection | The Central Plant building will be undergoing
seismic upgrades in the near future.
The adjoining north wall along the Y arm |
|
|
14438
|
Thu Feb 7 13:55:25 2019 |
gautam | Update | VAC | RGA turned on | [chub, steve, gautam]
Steve came by the lab today. He |
|
|
14440
|
Thu Feb 7 19:28:46 2019 |
gautam | Update | VAC | IFO recovery | [rana, gautam]
The full 1 W is again being sent
into the IMC. We have left the PBS+HWP combo |
|