| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
15459
|
Wed Jul 8 08:51:35 2020 |
Jordan | Update | General | Presence at 40m | I will be in the clean and bake lab today
from 9am to 3pm. |
|
|
15460
|
Wed Jul 8 22:50:33 2020 |
gautam | Update | Computers | rossa: more symlinks | I wanted to try using rossa as my locking
workstation today. However, a few problems
became quickly evident. Basically, any of |
|
|
15461
|
Thu Jul 9 09:22:44 2020 |
Jordan | Update | General | Presence at 40m | I will be in the Clean and Bake lab today
from 9am to 3pm |
|
|
15463
|
Thu Jul 9 16:16:20 2020 |
gautam | Update | Computers | rossa: graphics driver issues? | I noticed these streaky lines again today
(but they were not a problem last night).
It is annoying if we have to reboot this |
|
|
15464
|
Thu Jul 9 17:12:52 2020 |
gautam | Update | BHD | In-air BHD | Summary:
We can probably learn something
about the interferometer / top level BHD |
|
|
15466
|
Fri Jul 10 01:25:28 2020 |
gautam | Update | LSC | Locking notes | More tomorrow, but I tried the following
tonight:
Dither alignment for PRC |
|
|
15467
|
Fri Jul 10 10:37:30 2020 |
Jordan | Update | General | Presence at 40m | I will be in the Clean and Bake lab today
from 9am to 4pm |
|
|
15468
|
Fri Jul 10 15:26:28 2020 |
gautam | Update | LSC | MC2 coils need DC balancing? | I was looking at some signals from last
night, see Attachment |
|
|
15469
|
Sat Jul 11 00:10:22 2020 |
gautam | Update | Computers | rossa: more developmental work | After some consultation with Erik von Reis
at LHO, this workstation is progressing towards
being usable |
|
|
15470
|
Sat Jul 11 18:24:30 2020 |
Koji | Update | LSC | MC2 coils need DC balancing? | > Can't
we offload this DC signal to the laser crystal |
|
|
15471
|
Sun Jul 12 02:42:01 2020 |
gautam | Update | LSC | Locking (on rossa) | Main goals tonight were:
Check if I can lock the
interferometer by working on rossa - indeed, |
|
|
15472
|
Sun Jul 12 22:40:35 2020 |
gautam | Update | Electronics | WFS characterization - old SURF report | After some hunting, I found this
old SURF report with the WFS head measurements.
The y-axes don't make much sense to me, |
|
|
15473
|
Mon Jul 13 11:33:18 2020 |
rana | Update | Computers | rossa: more developmental work | I too, would prefer py3 for everything,
but aren't all the cdsutils / gaurdian
things still python2? |
|
|
15474
|
Mon Jul 13 11:36:08 2020 |
rana | Update | LSC | MC2 coils need DC balancing? |
if IMC REFL is not increasing,
I don't think its a mis-alignment. Usually,
REFL is a more sensitive indicator of alignment |
|
|
15475
|
Mon Jul 13 12:37:05 2020 |
gautam | Update | Computers | rossa: more developmental work | In fact, all these utilities are now available
in python3. There may be some bugs (e.g.
this), |
|
|
15476
|
Tue Jul 14 00:06:09 2020 |
gautam | Update | LSC | Locking with POX for CARM | I tried using the POX_I error signal for
the DC CARM_B path today a couple of times.
Got to a point where the AO path could be |
|
|
15477
|
Tue Jul 14 01:55:03 2020 |
Koji | Update | LSC | Locking with POX for CARM | The usual technique is that keeping the
IFO locked with the old set of the signals
and the relative gain/TF between the conventional |
|
|
15478
|
Tue Jul 14 09:04:53 2020 |
Jordan | Update | General | Presence at 40m | I will be in the Clean and Bake Lab today
from 9am to 4pm. |
|
|
15479
|
Tue Jul 14 15:29:25 2020 |
gautam | Update | BHD | In-air BHD - DCPD amplifier noise | For the first pass, it's probably easiest
to use the existing DCPD
amplifier. Looking at the gain and noise |
|
|
15480
|
Tue Jul 14 16:52:47 2020 |
gautam | Update | Electronics | Coil drivers for the test masses | Summary:
Koji and I had a discussion last
Friday about the suspension electronics. |
|
|
15481
|
Tue Jul 14 17:28:29 2020 |
gautam | Update | LSC | Locking with POX for CARM | From Attachment
#1, looks like the |
|
|
15483
|
Wed Jul 15 19:11:40 2020 |
gautam | Update | BHD | In-air BHD - alignment into OMC | I forgot about the pointing - probably
we will need another actuator to control
the pointing of the AS beam onto the DCPDs. |
|
|
Draft
|
Wed Jul 15 19:17:09 2020 |
gautam | Update | BHD | In-air BHD - alignment into OMC | You can activate all 3axis
|
|
|
15485
|
Wed Jul 15 19:23:44 2020 |
gautam | Update | General | Emergency light on in control room | The emergency lamps above the exit sign
on the NW entrance to the control room are
on. I tried opening and closing the door, |
|
|
15486
|
Wed Jul 15 19:51:51 2020 |
Koji | Update | General | Emergency light on in control room | It happened before too. Doesn't it
say it has occasional self-testing or something? |
|
|
15487
|
Wed Jul 15 20:58:40 2020 |
gautam | Update | General | Emergency light on in control room | True - it is now not on anymore.
|
|
|
15488
|
Wed Jul 15 21:08:43 2020 |
gautam | Update | Electronics | ETM coil outputs DQed | To facilitate this investigation, I've
DQed the 4 face coil outputs for the two
ETMs. EX is currently running with 5 times |
|
|
15489
|
Thu Jul 16 01:12:22 2020 |
gautam | Update | BHD | In-air BHD - preparing the LO path | Attachment
#1 - The 80mW pickoff |
|
|
15490
|
Thu Jul 16 14:41:22 2020 |
gautam | Update | General | Fire extinguisher inspection | The (masked) tech accessed all areas in
the lab (office area, control room, VEA)
between ~230pm-3pm. The laser safety goggles |
|
|
15491
|
Fri Jul 17 00:18:13 2020 |
gautam | Update | General | Locking updat |
I found that an EPICS channel wasn't
reset to the correct value by burtrestore
after the FE bootfest yesterday.
This |
|
|
15492
|
Fri Jul 17 09:03:58 2020 |
Jordan | Update | General | Presence at 40m | I will be in the Clean and Bake lab today
from 9am to 4pm. |
|
|
15493
|
Sun Jul 19 15:40:15 2020 |
gautam | Update | BHD | In-air BHD - CDS and wiring summary | Attachment
#1 shows the proposed |
|
|
15494
|
Mon Jul 20 17:23:46 2020 |
gautam | Update | Electronics | Coil drivers for the test masses | Summary:
Looking at the signals to the test
mass coils, it seems borderline |
|
|
15495
|
Mon Jul 20 17:55:15 2020 |
gautam | Update | BHD | In-air BHD - preparing the LO path | The LO pickoff has been coupled into a
fiber with ~90% MM (8 mW / 9 mW input). While
I wait for the DCPD electronics to be found |
|
|
15497
|
Tue Jul 21 00:30:24 2020 |
gautam | Update | BHD | In-air BHD - LO RIN | Attachment
#1 shows the RIN of |
|
|
15498
|
Tue Jul 21 16:41:46 2020 |
gautam | Update | BHD | PMC assembly space | I decided to use the old EY auxiliary optics
table, which is now stored along the east
arm about 10 m from the end, as a workspace |
|
|
15500
|
Fri Jul 24 15:40:59 2020 |
Jordan | Update | VAC | Installation of two new UPS units | I installed the Tripp
Lite SMX1000RT2U and Tripp
Lite Smart1000LCD at the |
|
|
15502
|
Tue Jul 28 12:22:40 2020 |
Jon | Update | VAC | Vac interlock test today 1:30 pm | This afternoon Jordan is going to carry
out a test of the V4 and V5 hardware
interlocks. To inform the interlock improvement |
|
|
15503
|
Tue Jul 28 13:55:11 2020 |
Hang | Update | BHD | Exploring bilinear SRCL->DARM coupling | We explore bilinear SRCL to DARM noise
coupling mechanisms, and show two cases that
by doing BHD readout the noise performance |
|
|
15504
|
Tue Jul 28 14:11:14 2020 |
Jon | Update | VAC | Vac interlock test today 1:30 pm | This test has been completed. The IFO configuration
has been reverted to nominal.
For future reference: yes, |
|
|
15505
|
Wed Jul 29 11:57:59 2020 |
rana | Update | BHD | In-air BHD - CDS and wiring summary | 3. I agree - this whitening will be handy
to have for diagnostics.
4. I think in principle, we can |
|
|
15506
|
Thu Jul 30 16:16:43 2020 |
gautam | Update | SUS | Suspension recovery | This
earthquake and friends had tripped all
watchdogs. I used the scripted watchdog re-enabler, |
|
|
15507
|
Thu Aug 6 00:34:38 2020 |
Yehonathan | Update | BHD | Monte Carlo Simulations | I've pushed an MCMC simulation to the
A+ BHD repo (filename MCMC_TFs.ipynb). The
idea is to show how random offsets around |
8x |
|
15508
|
Thu Aug 6 22:57:20 2020 |
gautam | Update | safety | New live HV Supplies | Be aware that there is now a KEPCO HV supply
that is energized, sitting on the floor immediately
adjacent to the OMC rack, east of the AP |
|
|
15509
|
Fri Aug 7 11:23:47 2020 |
rana | Update | BHD | Monte Carlo Simulations | that's great. I think we would like
to figure out how to present this so that
its clear what the distribution of TFs is. |
|
|
15512
|
Mon Aug 10 07:13:00 2020 |
Yehonathan | Update | BHD | Monte Carlo Simulations | I fixed some stuff in the MCMC simulation:
1. Results are now plotted as shades
from minimum to maximum. I tried making the |
8x |
|
15513
|
Mon Aug 10 16:52:04 2020 |
gautam | Update | BHD | Workable setup prepared | All the details are in E2000436,
and documents linked from there, I think
an elog would be much too verbose. In summary, |
|
|
15514
|
Tue Aug 11 23:20:29 2020 |
gautam | Update | BHD | Some first tests with air BHD setup | Some tests done today:
All of these tests were done with
the PRMI locked with carrier resonant in |
|
|
15515
|
Wed Aug 12 17:36:42 2020 |
gautam | Update | CDS | Timing distribution slot availability | See Attachment
#1. J8 was connected |
|
|
15516
|
Wed Aug 12 17:42:58 2020 |
gautam | Update | Electronics | Photodiode inventory | See Attachments
#1 and #2. |
|