| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
13020
|
Tue May 30 17:45:35 2017 |
jigyasa | Summary | Cameras | GigE configuration | To verify the Pylon Installation on the
shared drive, I tried connecting the Basler
acA640-100gm to the PoE connector and running |
|
|
13019
|
Tue May 30 16:02:59 2017 |
gautam | Update | General | Coil driver boards reinstalled | I think the reason I am unable to engage
the de-whitening is that the OL loop is injecting
a ton of control noise - see Attachment #1. |
|
|
13018
|
Tue May 30 13:36:58 2017 |
Steve | Update | Optical Levers | ETMY Oplev HeNe is replaced | Finally I reallized what is killing the
ETMY oplev laser. Wrong
power supply, it was driving the |
|
|
13017
|
Mon May 29 16:47:38 2017 |
gautam | Update | General | Coil driver boards reinstalled | Yesterday,
I reinstalled the de-whitening boards + coil
driver boards into their respective Eurocrate |
|
|
13016
|
Sat May 27 10:26:28 2017 |
Kaustubh | Update | General | Transimpedance Calibration | Using Alberto's paper LIGO-T10002-09-R
titled "40m RF PDs Upgrade", I
calibrated the vertical axis in the bode |
|
|
13015
|
Thu May 25 19:27:29 2017 |
gautam | Update | General | Coil driver board noises | [Koji, Gautam]
Summary:
Attachment
#1 shows the measured/modeled noise |
|
|
13014
|
Thu May 25 18:37:11 2017 |
jigyasa | Update | Computer Scripts / Programs | Making pylon installation on shared directory | Gautam helped me execute the commands mentioned
above and Pylon has now been installed
on the shared directory. We extracted the |
|
|
13013
|
Thu May 25 16:42:41 2017 |
jigyasa | Update | Computer Scripts / Programs | Making pylon installation on shared directory | I have been working on interfacing with
the GigE’s. I went through Joe Be’s
paper and the previous elogs and verified |
|
|
13012
|
Thu May 25 12:22:59 2017 |
gautam | Update | CDS | slow machine bootfest | After ~3months without any problems on
the slow machine front, I had to reboot |
|
|
13011
|
Wed May 24 18:19:15 2017 |
Kaustubh | Update | General | ET-3010 PD Test | Summary:
In continuation to the previous
test conducted on the ET-3040 PD, I |
|
|
13010
|
Tue May 23 22:58:23 2017 |
gautam | Update | General | De-Whitening board noises | Summary:
I |
|
|
13009
|
Tue May 23 18:09:18 2017 |
Kaustubh | Configuration | General | Testing ET-3010 PD | In continuation with the previous(ET-3040
PD) test.
The ET-3010 PD requires to be fiber |
|
|
13008
|
Tue May 23 16:33:00 2017 |
Steve | Update | Optical Levers | Beam Profiling Results | You may compare your results with this.
RXA: please no, that's not
the right way |
|
|
13007
|
Tue May 23 15:22:04 2017 |
rana | Update | Optical Levers | Beam Profiling Results |
Include several sources of error.
Micrometer error is one, but you should be
able to think of at least 3 more.
There |
|
|
13006
|
Tue May 23 10:27:24 2017 |
Dhruva | Update | Optical Levers | Beam Profiling Results | I have attempted to calculate the
instrument error (micrometer least count)
using the values of the spot size obtained |
6x |
|
13005
|
Mon May 22 18:20:27 2017 |
Kaustubh | Summary | General | Testing of the new Photo Detectors ET-3010 and ET-3040 | I am adding the text files with the data
readings and paramater settings along
with the Bode Plot of the data. I plotted |
|
|
13004
|
Mon May 22 15:01:41 2017 |
jigyasa | Update | telescope design | Updated Telescope design with 1'' eye piece | I examined
the use of a single lens system for the available
range of focal lengths, for the required |
|
|
13003
|
Mon May 22 13:37:01 2017 |
gautam | Update | General | DAC noise estimate | Summary:
I've |
|
|
13002
|
Mon May 22 10:53:02 2017 |
Dhruva | Update | Optical Levers | Beam Profiling Results |
|
6x |
|
13000
|
Mon May 22 10:15:14 2017 |
jigyasa | Summary | telescope design | Lens tubes and object distances | Since the
f numbers of the lenses in the proposed design
with biconvex lenses are a little less than |
|
|
12999
|
Fri May 19 19:18:53 2017 |
Kaustubh | Summary | General | Testing of the new Photo Detectors ET-3010 and ET-3040 | Motivation:
I got some hands-on-experience
on using RF photodetectors and the Network |
|
|
12998
|
Thu May 18 15:20:29 2017 |
jigyasa | Summary | telescope design | Telescope Design for the Gig-E cameras | With the objective of designing a telescope
system for the Gig-E, a system of two lenses
is implemented. A rough schematic of |
6x |
|
12997
|
Wed May 17 18:08:45 2017 |
Dhruva | Update | Optical Levers | Beam Profiling Setup | Andrew and I set up the razor blade beam
profiling experiment for He-Ne lasers on
the "SP" table. Once I receive |
|
|
12996
|
Wed May 17 11:10:31 2017 |
Steve | Update | Cameras | MC2 CCD video camera back in place | Olympus camera is removed and our old CCD
camera is back to monitor the face of MC2
|
|
|
12995
|
Wed May 17 08:19:59 2017 |
Steve | Update | SUS | 4.1M earthquake | Sus dampings recovered. ETMY oplev needs
to be recentered.
|
|
|
12994
|
Tue May 16 16:16:16 2017 |
Steve | Update | safety | safety training | Early surfs of India Jigyasa and
Kaustubh received basic 40m specific safety
traning. |
|
|
12993
|
Mon May 15 20:43:25 2017 |
rana | Configuration | Computers | catastrophic multiple monitor failures | this is not the right one; this Ethernet
controlled strip we want in the racks for
remote control. |
|
|
12992
|
Mon May 15 19:21:04 2017 |
Koji | Update | Computer Scripts / Programs | FSSslow / MCautolocker restarted | It seems that FSS slow servo stopped working.
I found that megatron was restarted
( |
|
|
12991
|
Mon May 15 08:26:43 2017 |
rana | Update | CDS | SVN up in userapps/cds | I did an 'svn update' in userapps/cds/
which pulled in some changes from the sites
as well as various CDS utilities in common/ |
|
|
12990
|
Fri May 12 18:50:08 2017 |
gautam | Update | General | ITM and BS coil driver + dewhite board pulled out | I've uploaded high-res photos + marked
up schematics to the same DCC page linked
in the previous page. I've noted the |
|
|
12989
|
Fri May 12 18:45:04 2017 |
rebecca | Update | Cameras | MC2 Pics with Olympus | Raw and JPG formats of the pictures are
saved on the Mac in the control room and
at this link: |
|
|
12988
|
Fri May 12 12:34:55 2017 |
gautam | Update | General | ITM and BS coil driver + dewhite board pulled out | I first set the bias sliders to 0 on the
MEDM screen (after checking that the nominal
values were stored), then shut down the watchdogs, |
|
|
12987
|
Fri May 12 01:36:04 2017 |
gautam | Update | General | SRM coil driver + dewhite board LISO modeling | I've
made the LISO models for the dewhitening
board and coil driver boards I pulled out. |
|
|
12986
|
Thu May 11 18:59:22 2017 |
gautam | Update | General | SRM coil driver + dewhite board initial survey | I've added marked-up schematics + high-res
photographs of the SRM coil driver board
and dewhitening board to the 40m DCC Document |
|
|
12985
|
Thu May 11 09:45:46 2017 |
rana | Update | General | DAC / Coil Driver noise - SRM coil driver + dewhite board removed | I believe the ETMs and ITMs are different
from the others. |
|
|
12984
|
Wed May 10 17:46:44 2017 |
gautam | Update | General | DAC / Coil Driver noise - SRM coil driver + dewhite board removed | I've
removed the SOS coil driver (D010001-B, |
|
|
12983
|
Wed May 10 17:17:05 2017 |
gautam | Update | General | DAC / Coil Driver noise | Suspension
Actuator noise:
There
are 3 main sources of electronics noise which |
|
|
12982
|
Wed May 10 16:57:52 2017 |
rana | Update | CDS | MCautolocker dead | I rebooted megatron around 12:20 today.
It had dozens of stalled medm process (some
of them there since February!). I couldn't |
|
|
12981
|
Wed May 10 16:53:38 2017 |
rana | Update | General | MICH NB - OL coupling | That's a good find.
The OL control signal can
be gotten from the DQ error signal. You just |
|
|
12980
|
Wed May 10 12:37:41 2017 |
gautam | Update | CDS | MCautolocker dead | The MCautolocker had stalled - there were
no additional lines to the logfile after
12:17pm (~20mins ago). Normally, it suffices |
|
|
12979
|
Wed May 10 01:56:06 2017 |
gautam | Update | General | MICH NB - OL coupling | Last night, I tried to estimate the contribution
of OL feedback signal to the MICH length
error signal.
In order to do so, |
|
|
12978
|
Tue May 9 15:23:12 2017 |
Steve | Configuration | Computers | catastrophic multiple monitor failures | Gautam and Steve,
Surge
protective power strip was install on |
|
|
12977
|
Mon May 8 21:53:56 2017 |
rana | Summary | SEI | attempt to get seismic BLRMS minute trend | I tried to
get some minute trend data today, but was
unable to get it from inside or outside the |
|
|
12976
|
Sat May 6 21:52:11 2017 |
rana | Update | General | MICH NB questions | I think the most important next two items
to budget are the optical lever noise, and
the coil driver noise. The coil driver noise |
|
|
12975
|
Fri May 5 12:10:53 2017 |
gautam | Update | General | MICH NB questions | [quote]Is suspension thermal noise missing?
I take it "Thermal" refers just
to thermal things going on in the optic, |
|
|
12974
|
Fri May 5 10:13:02 2017 |
ericq | Update | General | MICH NB questions | Is suspension thermal noise missing? I take
it "Thermal" refers just to thermal things
going on in the optic, since I don't see |
|
|
12973
|
Fri May 5 08:41:42 2017 |
Steve | Update | Cameras | MC2 resonant pictures | Olympus SP570 UZ - without IR blocker,
set up as Atm.3 Camera distance to
MC face ~85 cm, IOO-MC_TRANS_SUM |
|
|
12972
|
Thu May 4 19:03:15 2017 |
gautam | Update | General | DRMI locking - preliminary MICH NB | Summary:
|
|
|
12971
|
Thu May 4 09:52:43 2017 |
rana | Configuration | Computers | catastrophic multiple monitor failures | That's a new failure mode. Probably
we can't trust the power to be safe anymore.
Need Steve to order a couple |
|
|
12970
|
Thu May 4 08:00:54 2017 |
Steve | Update | safety | safety training | Freshmen Rebecca Zhang as " work study
undergrad " received 40m specific
basic safety training yesterday. |
|