| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
13953
|
Wed Jun 13 11:17:40 2018 |
gautam | Update | LSC | PRCL loop shape anomaly | Attachment
#1 shows the measured |
|
|
13954
|
Wed Jun 13 11:59:03 2018 |
keerthana | Update | elog | command line enabled code for frequency scanning | I have modified the code for frequency
scanning and have made it completely command
line enabled. The code is written in python. |
|
|
13955
|
Wed Jun 13 12:21:09 2018 |
gautam | Update | ALS | PDFR laser checkout | I want to use the Fiber Coupled laser from
the PDFR
system to characterize the response of |
|
|
13956
|
Wed Jun 13 18:08:36 2018 |
keerthana | Update | | Finesse code for cavity scan | The unit mentioned in the x-axis was wrong.
So I have remade the graphs. The point where
frequency equals to zero is actually the |
|
|
13957
|
Wed Jun 13 22:07:31 2018 |
gautam | Update | ALS | BeatMouth PDFR measurement | Summary:
Neither |
|
|
13958
|
Wed Jun 13 23:23:44 2018 |
johannes | Update | CDS | EX wiring confusion | It's true.
I went through the wiring of the
c1auxex crate today to disentangle the pin |
|
|
13959
|
Thu Jun 14 00:40:42 2018 |
gautam | Update | LSC | PRCL loop shape anomaly | don't use IN_1/IN_2: recall pizza meeting
from a few weeks back: use IN1/EXC + Al-Gebra
|
|
|
13960
|
Thu Jun 14 00:46:09 2018 |
rana | Update | IOO | WFS HEAD SW confusion | its painful, but you and I should probably
take these out, bypass the switches
and use them with fixed gain; |
|
|
13961
|
Thu Jun 14 10:41:00 2018 |
gautam | Update | CDS | EX wiring confusion | Do we really have 2 free ADC channels at
EX now? I was under the impression we had
ZERO free, which is why we wanted to put |
|
|
13962
|
Thu Jun 14 13:29:51 2018 |
gautam | Update | General | PSL shutter closed, all optics misaligned | [jon, gautam]
Jon is doing some characterization
of the AUX laser setup for which he wanted |
|
|
13963
|
Thu Jun 14 15:21:58 2018 |
gautam | Update | Computer Scripts / Programs | /cvs/cds Backup in danger | I think this is because /cvs/cds is getting
too big. lsblk reveals:
|
|
|
13964
|
Thu Jun 14 15:24:32 2018 |
Steve | Update | PEM | ADC DAC In Line Test Boards are in | We have 6 of these boards now in cabinet
E7
|
|
|
13965
|
Thu Jun 14 15:31:18 2018 |
johannes | Update | CDS | EX wiring confusion | Bad wording, sorry. Should have been channels
in excess of ETMX controls. I'll add
the others to the list as well. |
|
|
13966
|
Thu Jun 14 18:09:24 2018 |
gautam | Update | LSC | Reliable and repeatable 1f DRMI locking | I finally analyzed the sensing measurement
I ran on Tuesday evening. Sensing responses
for the DRMI DOFs seems consistent with what |
|
|
13967
|
Thu Jun 14 19:30:12 2018 |
gautam | Update | General | IFO alignment restored | All optics have been re-aligned. Jon/Johannes
will elog about the work today. |
|
|
13968
|
Thu Jun 14 22:45:05 2018 |
johannes | Update | General | AUX beam SRC alignment | [Jon, Gautam, Johannes]
Jon spent some time trying to align
the AUX beam to the SRC today, I got to the |
|
|
13969
|
Fri Jun 15 00:53:21 2018 |
gautam | Update | LSC | Calibrated MICH spectrum | Using the numbers from the sensing measurement,
I calibrated the measured in-loop MICH spectrum
from Tuesday night into free-running displacement |
|
|
13970
|
Fri Jun 15 08:09:15 2018 |
Steve | Bureaucracy | General | cleaning up at the PSL enclousure | The cabeling was cleaned up a little bit
yesterday morning. The upper back side is
still massy. |
|
|
13971
|
Fri Jun 15 09:14:42 2018 |
Steve | Update | General | Oplev sums | Oplev sums of 240 days.
|
|
|
13972
|
Fri Jun 15 09:51:55 2018 |
pooja | Update | Cameras | Developing neural network | Aim : To develop a neural network on simulated
data.
I developed a python code that |
|
|
13973
|
Fri Jun 15 14:22:05 2018 |
gautam | Update | ALS | BeatMouth PDFR measurement | I did the measurement with the BeatMouth
open today. Main changes:
Directly pipe the RF output |
|
|
13974
|
Sat Jun 16 00:26:48 2018 |
gautam | Update | General | PRC modescan attempt | [Jon, Gautam, Johannes]
We did the following today:
Dither align arms such |
|
|
13975
|
Sat Jun 16 01:25:29 2018 |
Koji | Update | General | PRC modescan attempt | The PRC FSR is, of course, very close to
twice of our f1 moudlation frequency (11MHz
x 2 = 22MHz) . |
|
|
13976
|
Sat Jun 16 20:57:59 2018 |
Jon | Update | General | PRC modescan attempt | Here's a Finesse modeling of what
we're expecting to observe with this
test. It uses Gautam's base |
|
|
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), |
|
|
13978
|
Mon Jun 18 10:34:45 2018 |
johannes | Update | Computer Scripts / Programs | running comsol job on optimus | I'm running a comsol job on optimus
in a tmux session named cryocavs. Should
be done in less than 24 hours, judging by |
|
|
13979
|
Mon Jun 18 11:12:23 2018 |
Kira | Summary | PEM | finishing up work at the lab | Since I am finishing my job at the lab,
I have stored all my electronics in a box
(attachment 1) and placed it under the table |
|
|
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 |
|
|
13981
|
Mon Jun 18 14:32:42 2018 |
gautam | Update | PSL | Optics on AS table | Yesterday, I moved the following optics:
Lens in front of AS110
PD.
BS splitting light between |
|
|
13982
|
Mon Jun 18 15:59:17 2018 |
johannes | Update | PSL | Optics on AS table |
Quote:
|
|
|
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. |
|
|
13984
|
Mon Jun 18 19:47:02 2018 |
gautam | Update | General | MICH actuator calibration | Summary:
The actuator (pendulum) gains for
the Beam Splitter and the two ITMs were measured |
|
|
13985
|
Tue Jun 19 00:19:00 2018 |
gautam | Update | ASC | POP status check | Motivation:
I want to use the QPD at
POP, calibrate it into physical units, and |
|
|
13986
|
Tue Jun 19 14:08:37 2018 |
pooja | Update | Cameras | CCD calibration using LED1050E | Aim: To measure the optical power from
led using a powermeter.
Yesterday Gautam drilled a larger |
|
|
13987
|
Tue Jun 19 18:56:55 2018 |
Jon | Update | General | AUX beam alignment issues | Not much progress today with the AUX cavity
scans. I've determined there still are
some alignment issues. |
|
|
13988
|
Tue Jun 19 23:27:27 2018 |
gautam | Update | SUS | ETMX coil driver work in AM tomorrow | Per discussion today eve, barring objections, |
|
|
13989
|
Wed Jun 20 00:57:04 2018 |
johannes | Update | General | AUX beam alignment issues | We did swap a lens as discussed in elog 13968,
but they both had f=100mm specified, the
difference being one was AR-coated for 1064 |
|
|
13990
|
Wed Jun 20 09:16:56 2018 |
Steve | Update | PEM | dusty lab | You should wipe off the table cover before
you take it off next time.
It is important to turn up the |
|
|
13991
|
Wed Jun 20 20:39:36 2018 |
pooja | Update | Cameras | CCD calibration using LED1050E |
|
|
|
13992
|
Thu Jun 21 00:14:01 2018 |
gautam | Update | SUS | ETMX coil driver out | I finished the re-soldering work today,
and have measured the coil driver noise pre-Mods
and post-Mods. Analysis tomorrow. I am holding |
|
|
13993
|
Thu Jun 21 03:13:37 2018 |
gautam | Update | SUS | ETMX coil driver noise | I decided to take a quick look at the data.
Changes made to the ETMX coil driver board:
Fast path series resistances: |
|
|
13994
|
Thu Jun 21 09:33:02 2018 |
Jon | Update | | AUX Mode Scans of YARM, PRC cavities | [Jon, Keerthana, Sandrina]
Yesterday we carried out preliminary
proof-of-concept measurements using |
|
|
13995
|
Thu Jun 21 13:24:00 2018 |
keerthana | Update | elog | The cavity scan data of June 20 | (Jon, Keerthana, Sandrine)
We tried to align the AUX and PSL
laser yesterday. We collected the data from |
|
|
13996
|
Thu Jun 21 14:23:22 2018 |
Udit Khandelwal | Summary | General | A summary of the Tip-TIlt Mirror Holder design changes | Here’s a quick summary of the Tip-Tilt
Design updates (all files are in the dropbox
in [TipTiltSus>TT_New]) that I have been |
|
|
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 |
|
|
13998
|
Thu Jun 21 15:32:05 2018 |
gautam | Update | Electronics | EX AA filter range change | [steve, gautam]
I took this opportunity of EX downtime
to change the supply voltage for the AA unit |
|
|
13999
|
Thu Jun 21 18:25:57 2018 |
gautam | Update | SUS | ETMX coil driver re-installed | Initial tests look promising. Local damping
works and I
even locked the X arm using POX, |
|
|
14000
|
Thu Jun 21 22:13:12 2018 |
gautam | Update | CDS | pianosa upgrade | pianosa |
|
|
14001
|
Thu Jun 21 23:59:12 2018 |
shruti | Update | PEM | Seismometer temp control | We (Rana and I) are re-assembling the temperature
controls on the seismometer to attempt PID
control and then improve it using reinforcement |
|
|
14002
|
Fri Jun 22 00:06:13 2018 |
shruti | Update | General | over-head fluorescent lights down | Two out of the four over-head fluorescent
lights in the X end of the interferometer
were flickering today. |
|