| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
14042
|
Fri Jul 6 19:39:37 2018 |
Udit Khandelwal | Summary | General | CAD drawings of cantilever suspension required | Request
to Koji to acquire the drawings or 3D CAD
of the cantilever suspensions of the Tip-Tilt |
|
|
14044
|
Sun Jul 8 12:20:12 2018 |
Jon | Summary | AUX | Gouy Phase Measurements from AUX-Laser Scans | This note reports analysis of cavity scans
made by directly sweeping the AUX laser carrier
frequency (no sidebands). The measurement |
|
|
14047
|
Mon Jul 9 17:29:28 2018 |
Udit Khandelwal | Summary | Tip-TIlt | TipTilt mirror holder final changes | Final Summary of changes to mirror holder
in Tip-Tilt holder.
Determining minimum range |
|
|
Draft
|
Wed Jul 11 18:13:19 2018 |
keerthana | Summary | AUX | Gouy Phase Measurements from AUX-Laser Scans | From the Measurement Jon made, FSR is 3.967
MHz and the Gouy phase is 52 degrees. From
this, the length of the Y-arm cavity |
|
|
14069
|
Fri Jul 13 20:36:33 2018 |
Koji | Summary | General | In vac/In air heater wiring | I went to the Y-end and took more photos
of the cable stand. These revealed that in-vac
pin #13 is connected to the shield of the |
|
|
14073
|
Mon Jul 16 15:07:19 2018 |
Koji | Summary | VAC | Oven C vent | [Steve Koji]
- Attachment1: Removed the thermal
cap. Checked the temperature of the oven. |
|
|
14077
|
Tue Jul 17 12:55:45 2018 |
Koji | Summary | General | Started pumping | [Steve, Koji, Gautam]
We started pumping down
at ~12:15PM. |
6x |
|
14079
|
Tue Jul 17 18:16:38 2018 |
Steve | Summary | VAC | pumpdown 81 at 6 hrs | Precondition: 4 days at atm.
Atm5
HEPA tent used during the vent |
6x |
|
14080
|
Tue Jul 17 22:25:41 2018 |
Koji | Summary | VAC | pumpdown 81 at 6 hrs | 10:20PM
Opened VM2 to pump down
the RGA section with TP1
Stopped |
|
|
14082
|
Wed Jul 18 12:49:08 2018 |
Steve | Summary | VAC | pumpdown 81 at 6 +4.5hrs | The manual gate valve scan was clean. Atm1
TP1 was pumping on it overnight.
|
|
|
14083
|
Wed Jul 18 17:36:50 2018 |
Steve | Summary | VAC | pumpdown 81 at 6 +9 hrs completed | IFO P1 6e-4 Torr, manual gate valve
is fully open
The annuloses will be pumped down |
|
|
14085
|
Thu Jul 19 01:56:25 2018 |
gautam | Summary | VAC | AUX pump shutdown | [koji,
gautam]
Per Steve's instructions, we |
|
|
14086
|
Thu Jul 19 04:44:09 2018 |
Annalisa, Terra | Summary | Thermal Compensation | frequency shift observed with heating! | Annalisa, Gautum, Koji, Terra
Summary: with
the reflector setup, we measured a frequency |
|
|
14087
|
Thu Jul 19 11:01:03 2018 |
Steve | Summary | VAC | pd81 @ 2e-5 Torr | Cold cathode gauge just turned on. |
|
|
14088
|
Thu Jul 19 13:35:30 2018 |
Steve | Summary | VAC | annuloses pumped | Roughing down the annuloses required closing
V1 for 13 minutes
IFO is 2.2e-5 Torr |
|
|
14090
|
Fri Jul 20 07:43:54 2018 |
Steve | Summary | SUS | ETMY |
|
|
|
14094
|
Sat Jul 21 01:06:49 2018 |
gautam | Summary | Thermal Compensation | Y arm locking | I implemented this today. For now, the
LSC output matrix is set to actuate on MC2
for Y arm locking. As expected, the transmission |
|
|
14096
|
Sat Jul 21 14:03:19 2018 |
Koji | Summary | Thermal Compensation | Y arm locking | Ah. With MC2 feedback, we have about 3
times smaller "optical gain" for
the ASS A2L. We have same dither, same actuator, |
|
|
14098
|
Mon Jul 23 09:58:52 2018 |
Steve | Summary | VAC | RGA scan at day 6 |
|
|
|
14103
|
Wed Jul 25 14:45:59 2018 |
Sandrine | Summary | Thermal Compensation | ETM Y Table AUX read out | Attached is a photo of the set up of the
ETM Y table showing the AUX read out set
up. |
|
|
14110
|
Sat Jul 28 00:45:11 2018 |
terra, sandrine | Summary | Thermal Compensation | Heater measurements overview | [Sandrine, Koji, Terra]
Summary: We
completed multiple scans at different heating |
7x |
|
14121
|
Wed Aug 1 16:23:48 2018 |
Koji | Summary | Computers | Transition of the main NFS disk on chiara | [Gautam Koji]
Taking the opportunity to shutdown
c1ioo for adding a DAC card, we shutdown |
|
|
14122
|
Wed Aug 1 19:41:15 2018 |
gautam | Summary | Computers | RTCDS recovery, c1ioo changes | [Gautam Koji]
After this work, we recovered the
nominal RTCDS state. The main points were: |
|
|
14123
|
Wed Aug 1 20:44:57 2018 |
gautam | Summary | Computers | c1omc model (re?)created | The main motivation behind adding a DAC
card in c1ioo was to setup an RTCDS model
for the OMC. Attachment #1 shows the new |
|
|
14125
|
Thu Aug 2 20:47:29 2018 |
gautam | Summary | Electronics | X Green "Mystery" solved | I walked
down to the X end and found that the entire |
|
|
14126
|
Thu Aug 2 20:54:18 2018 |
gautam | Summary | Computers | c1omc model looks stable | Actually, c1lsc had crashed again sometime
last night so I had to reboot everything
this morning. I used the reboot script again, |
|
|
14127
|
Thu Aug 2 23:09:25 2018 |
rana | Summary | Computers | X Green "Mystery" solved | I'm going to guess that this was me:
I was disconnecting some octopus power strip
nonsense down there (in particular illuminators |
|
|
14128
|
Fri Aug 3 14:35:56 2018 |
gautam | Summary | Electronics | EX AUX electronics power restored | Steve and I restored the power to the EX
AUX electronics rack. The power strip on
the lowest shelf of the AUX rack now |
|
|
14138
|
Mon Aug 6 09:42:10 2018 |
Koji | Summary | Computers | Transition of the main NFS disk on chiara | Follow up:
- At least it was confirmed that
the local backup (4TB->2TB) is regularly |
|
|
14175
|
Wed Aug 22 00:22:05 2018 |
Koji | Summary | Electronics | Inspection of the possible dual backplane interfaces for Acromag DAQ | [Johannes, Koji]
We went around the LSC, PSL, IOO,
and SUS racks to check how many dual backplane |
|
|
14177
|
Wed Aug 22 12:22:27 2018 |
rana | Summary | Electronics | Inspection of the possible dual backplane interfaces for Acromag DAQ | I think we don't need to keep Crystal
Ref: we can change this into a regular Wenzel
box with no outside control or monitoring. |
|
|
14213
|
Sun Sep 23 20:15:35 2018 |
Koji | Summary | OMC | Montecarlo simulation of the phase difference between P and S pols for a modeled HR mirror | Link to OMC_Lab
ELOG 308 |
|
|
14367
|
Wed Dec 19 14:19:15 2018 |
Koji | Summary | VAC | Plan for pumpoing down test | We
still need elaborated test procedure posted
12/29 Wed |
|
|
14439
|
Thu Feb 7 17:27:53 2019 |
Koji | Summary | Tip-TIlt | Five FiveNine Optics Optics delivered | 5 PR3/SR3 optics from FiveNine Optics were
delivered. The data sheets were scanned and
uploaded to the following wiki page. https://wiki-40m.ligo.caltech.edu/Aux_Optics |
|
|
14442
|
Fri Feb 8 00:20:56 2019 |
gautam | Summary | Tip-TIlt | Five FiveNine Optics Optics delivered | They have been stored on the 3rd shelf
from top in the clean optics cabinet at the
south end. EX |
|
|
14444
|
Fri Feb 8 20:35:57 2019 |
gautam | Summary | Tip-TIlt | Coating spec | [Attachment
#1]: Computed spectral |
|
|
14448
|
Mon Feb 11 19:53:59 2019 |
gautam | Summary | Loss Measurement | Loss measurement setup | To measure the Y-arm loss, I decided to
start with the classic reflectivity method.
To prepare for this measurement, I did the |
|
|
14449
|
Tue Feb 12 18:00:32 2019 |
gautam | Summary | Loss Measurement | Loss measurement setup | Another
arm loss measurement started at 6pm. |
|
|
14450
|
Tue Feb 12 22:59:17 2019 |
gautam | Summary | Loss Measurement | Y arm loss | Summary:
There are still several data quality
issues that can be improved. I think there |
|
|
14451
|
Wed Feb 13 02:28:58 2019 |
gautam | Summary | Loss Measurement | Y arm loss | Attachment #1 shows estimated systematic
uncertainty contributions due to
ITM transmission by +/- |
|
|
14454
|
Thu Feb 14 21:29:24 2019 |
gautam | Summary | Loss Measurement | Inferred Y arm loss | Summary:
From the measurements I have, the
Y arm loss is estimated to be 58 |
|
|
14463
|
Sun Feb 17 17:35:04 2019 |
gautam | Summary | Loss Measurement | Inferred X arm loss | Summary:
To complete the story before moving
on to ALS, I decided to measure the X arm |
|
|
14464
|
Mon Feb 18 19:16:55 2019 |
rana | Summary | Computers | new laptop setup: ASIA | The old IBM laptop (Asia) has died from
a fan error after 7 years. WE have a new
Lenovo 330 IdeaPad to replace it: |
|
|
14474
|
Tue Mar 5 15:56:27 2019 |
gautam | Summary | Tip-TIlt | Discussion points about TT re-design | Chub, Koji and I have been talking about
Udit's re-design. Here are a few points
that were raised. Chub/Koji can add to/correct |
|
|
14485
|
Mon Mar 18 18:10:14 2019 |
Koji | Summary | General | Task items and priority | [Gautam/Chub/Koji] ~ Mini discussion
Maintenance / Upgrade Items
(Priority high to low) |
|
|
14543
|
Mon Apr 15 18:29:07 2019 |
rana | Summary | Computers | new laptop setup: ASIA - yum issues | had trouble using YUM to update. This turned
out to be a config problem with our Martian
router, not the new laptop. Since I've |
|
|
14568
|
Wed Apr 24 17:39:15 2019 |
Yehonathan | Summary | Loss Measurement | Basic analysis of loss measurement | Motivation
Getting myself familiar
with Python.
Characterize statistical |
|
|
14598
|
Wed May 8 22:11:46 2019 |
rana | Summary | Computers | new laptop setup: ASIA - yum issues |
setup controls user using K Thorne
LLO CDS offsite workstation instructions
modified
/etc/fstab ala pianosa to NFS mount disks
set |
|
|
14616
|
Fri May 17 10:12:07 2019 |
Anjali | Summary | Equipment loan | Borrowed component | I borrowed one Marconi (2023 B) from
40 m lab to QIL lab. |
|
|
14618
|
Fri May 17 16:07:25 2019 |
gautam | Summary | Equipment loan | Borrowed component | ZHL-3A (2 units) —-> QIL
|
|