| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
13977
|
Sun Jun 17 14:20:35 2018 |
Koji | Update | General | Chiara new USB 4TB DIsk | I have connected a 4TB disk to chiara via
a USB-SATA adapter. This disk has been recognized
as /dev/sde. A GUID Partition Table (GPT), |
|
|
13980
|
Mon Jun 18 12:07:03 2018 |
Koji | Update | General | Chiara new USB 4TB DIsk | The initial local backup with rsync was
done. Now
the new 4TB disk is (supposed to be) automatically |
|
|
13983
|
Mon Jun 18 16:57:54 2018 |
Koji | Update | PSL | Optics on AS table | Of course, many (but no all) of the optics
were custom-ordered back in ~2000. |
|
|
13997
|
Thu Jun 21 14:57:59 2018 |
Koji | Summary | General | A summary of the Tip-TIlt Mirror Holder design changes | > 2. Weighted screw rod at the
bottom for tilting the mirror-holder:
Too long. The design of the holder |
|
|
14011
|
Sat Jun 23 20:54:35 2018 |
Koji | Update | AUX | First Coherent AUX Scan of PRC Using AM Sidebands | How much was the osc freq of the marconi?
And then how much was the resulting freq
offset between PSL and AUX? |
|
|
14015
|
Mon Jun 25 21:14:08 2018 |
Koji | Summary | General | Re: A summary of the Tip-TIlt Mirror Holder design changes | 3.
- Do we need this much of extended
range of the clamp location? How much range |
|
|
14026
|
Wed Jun 27 19:37:16 2018 |
Koji | Configuration | Computers | New NAT router installed | [Larry, Koji]
We replaced the NAT router between
martian and the campus net. We have the administrative |
|
|
14067
|
Fri Jul 13 17:13:45 2018 |
Koji | Update | General | Vent objectives and prep | Notice:
I removed these 75Ohm video cables. |
|
|
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. |
|
|
14074
|
Mon Jul 16 18:12:00 2018 |
Koji | Update | VAC | Adding a manual gate valve between TP1 and V1/VM2 | [Steve Koji]
We are in the process of adding
a manual gate valve between TP1 (Osaka Maglev) |
|
|
14077
|
Tue Jul 17 12:55:45 2018 |
Koji | Summary | General | Started pumping | [Steve, Koji, Gautam]
We started pumping down
at ~12:15PM. |
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 |
|
|
14084
|
Wed Jul 18 23:43:50 2018 |
Koji | Update | General | Vent 80 recovery | Is the reflector too close to the beam
and causing clipping?
|
|
|
14092
|
Fri Jul 20 22:51:28 2018 |
Koji | Update | IOO | IMC WFS path alignment | IMC WFS tuning
- IMC was aligned manually to have
maximum output and also spot at the center |
|
|
14093
|
Fri Jul 20 22:53:15 2018 |
Koji | Update | ASS | Attempt to resurrect Yarm ASS | [Koji Gautam]
We managed to realize stable
ASS configuration for Yarm. 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, |
|
|
14112
|
Sun Jul 29 00:59:54 2018 |
Koji | Update | Electronics | Characterization of Transimpedance Amplifier | You have this measurement problem when
the IF bandwidth is larger than the measurement
frequency. I suspect the IF bandwidth is |
|
|
14118
|
Mon Jul 30 18:19:03 2018 |
Koji | Update | SUS | Trillium interface box was fixed and reinstalled | The trillium interface box was removed
from the rack.
The |
|
|
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 |
|
|
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 |
|
|
14144
|
Tue Aug 7 23:06:30 2018 |
Koji | Update | PSL | EOM measuement preparation | I was preparing for the aLIGO EOM measuement
to be carried out tomorrow afternoon.
I did a few modifications to the |
|
|
14145
|
Wed Aug 8 20:56:11 2018 |
Koji | Update | PSL | EOM measuement preparation | Rich and I worked on the EOM measurement.
After the measurement, the setup was reverted
to the nominal state |
|
|
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 |
|
|
14180
|
Thu Aug 23 16:05:24 2018 |
Koji | Update | IMC | MC/PMC trouble | I don't know what had been wrong, but
I could lock the PMC as usual.
The IMC got relocked by AutoLocker. |
|
|
14197
|
Wed Sep 12 22:22:30 2018 |
Koji | Update | Computers | SSL2.0, SSL3.0 disabled | LIGO GC notified us that nodus had SSL2.0
and SSL3.0 enabled. This has been disabled
now. |
|
|
14208
|
Fri Sep 21 19:50:17 2018 |
Koji | Update | CDS | Frequent time out | Multiple realtime processes on c1sus are
suffering from frequent time outs. It eventually
knocks out c1sus (process). |
|
|
14210
|
Sat Sep 22 00:21:07 2018 |
Koji | Update | CDS | Frequent time out | [Gautam, Koji]
We had another crash of c1sus and
Gautam did full power cycling of c1sus. It |
|
|
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 |
|
|
14231
|
Fri Oct 5 00:46:17 2018 |
Koji | Configuration | ASC | Y-end table upgrade | ???
The SHG crystal has the conversion
efficiency of ~2%W (i.e. if you have 1W input |
|
|
14261
|
Thu Oct 18 00:27:37 2018 |
Koji | Update | SUS | SUS PD Whitening board inspection | [Gautam, Koji]
As a part of the preparation for
the replacement of c1susaux with Acromag, |
|
|
14341
|
Tue Dec 11 13:42:44 2018 |
Koji | Update | OMC | OMC channels | FYI:
D050368 Anti-Imaging Chassis
https://dcc.ligo.org/LIGO-D050368 |
|
|
14353
|
Thu Dec 13 20:10:08 2018 |
Koji | Update | General | Power Outage recovery | [Gautam, Aaron, Koji]
The PSL interlock system
was fixed and now the 40m lab is laser hazard |
|
|
14359
|
Fri Dec 14 14:25:36 2018 |
Koji | Update | CDS | chiara backup | fsck of chiara backup disk (UUID="90a5c98a-22fb-4685-9c17-77ed07a5e000")
was done. But this required many files to
be fixed. So the backed-up files are not |
|
|
14360
|
Fri Dec 14 22:19:22 2018 |
Koji | Update | General | Chiara new USB 4TB DIsk | Edit:
It was not 4TB |
|
|
14361
|
Sat Dec 15 18:29:53 2018 |
Koji | Update | General | Chiara new USB 4TB DIsk | The local backup was done at 18:18
after 11h18m of running.
|
|
|
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 |
|
|
14371
|
Wed Dec 19 22:11:28 2018 |
Koji | Update | General | How to align the copper OMC | The OMC input optics layout is attached
Checked the spot position on OMMT-FM1.
It was off from the center. This was causing |
|
|
14379
|
Fri Dec 21 12:57:10 2018 |
Koji | Omnistructure | VAC | N2 line valved off | Independent question: Are all the turbo
forelines vented automatically? We manually
did it for the main roughing line. |
|
|
14385
|
Fri Jan 4 15:18:15 2019 |
Koji | Update | General | Chiara disk clean up and internally mounted | [Koji Gautam]
Took the opprtunity of the power
glitch to take care of the disk situation |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
14470
|
Mon Feb 25 20:20:07 2019 |
Koji | Update | SUS | DIN 41612 (96pin) shrouds installed to vertex SUS coil drivers | The forthcoming Acromag c1susaux is
supposed to use the backplane connectors
of the sus euro card modules. |
|
|
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) |
|
|
14492
|
Thu Mar 21 18:09:36 2019 |
Koji | Update | CDS | db file preparation for acromag c1susaux | I have updated the google doc spreadsheet
to indicate the required action for the new
dbfile |
|
|
14499
|
Thu Mar 28 23:29:00 2019 |
Koji | Update | SUS | Suspension PD whitening and I/F boards modified for susaux replacement | Now
the sus PD whitening bards
are ready to move the |
|
|
14513
|
Wed Apr 3 12:32:33 2019 |
Koji | Update | ALS | Note about new fiber couplers | Andrew seems to have an integrated solution
of PBS+HWP in a singe mount. Or, I wonder
if we should use HWP/QWP before the coupler. |
|
|
14535
|
Thu Apr 11 11:42:10 2019 |
Koji | Update | PSL | PSL fan is noisy | This thread: ELOG
10295
My interpretation of these ELOGs |
|