| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
11732
|
Wed Nov 4 20:16:58 2015 |
yutaro | Update | Electronics | offset voltage vs. gain of common mode servo | At 1Y2 rack, I measured offset voltage
of the common mode servo (D040180-B)
with the gain of it varied. |
|
|
11737
|
Thu Nov 5 10:48:21 2015 |
yutaro | Update | Electronics | offset voltage vs. gain of common mode servo | I report the results of the measurement
to know how offset voltage of common
mode servo changes when the gain is changed. |
|
|
11740
|
Mon Nov 9 11:34:51 2015 |
yutaro | Update | LSC | FSR and linewidth measurements with phase tracker | I fitted the data obtained with the FSR
and linewidth measurements and I've got
FSR and finesse of y-arm by fitting. |
|
|
11741
|
Mon Nov 9 14:24:36 2015 |
yutaro | Update | LSC | FSR and linewidth measurements with phase tracker | I'd like to add a few calculation results,
mode matching ratio for Y arm and modulation
depth. |
|
|
11746
|
Tue Nov 10 11:06:02 2015 |
yutaro | Update | LSC | Updated interpretation of peaks |
|
|
|
11749
|
Tue Nov 10 16:34:00 2015 |
yutaro | Update | LSC | Updated interpretation of peaks |
|
|
|
11766
|
Mon Nov 16 11:48:34 2015 |
yutaro | Update | Optical Levers | Beam centering for the oplev of ETMY | [yutaro, ericq]
We made the beam spot on QPD for |
|
|
11776
|
Tue Nov 17 20:40:08 2015 |
yutaro | Summary | ASC | Loss maps of arm cavities | In preparation for the measurement of loss
maps of arm cavities, I measured the relationship
between: |
|
|
11779
|
Wed Nov 18 11:22:13 2015 |
yutaro | Update | ASC | Loss maps of arm cavities | I got linear relation between these. The
results and method are below.
|
|
|
11783
|
Wed Nov 18 17:32:36 2015 |
yutaro | Update | Optical Levers | Beam centering for the oplev of ITMY | [yutaro, Koji]
|
|
|
11785
|
Wed Nov 18 22:26:33 2015 |
yutaro | Update | Optical Levers | Calibration of oplevs for ITMY/ETMY | Based on elog
1403, I calibrated the oplevs for ITMY/ETMY.
Summary of this method is following: |
|
|
11790
|
Thu Nov 19 16:06:54 2015 |
yutaro | Update | Optical Levers | Calibration of oplevs for ITMY/ETMY | I'm sorry. I will be careful about
that. And I updated the plots in elog
11785. |
|
|
11805
|
Tue Nov 24 11:18:47 2015 |
yutaro | Update | Optical Levers | Beam centering for the oplev of ITMY | I made the beam spot |
|
|
11806
|
Tue Nov 24 14:58:40 2015 |
yutaro | Update | LSC | ITMX misaligned | I misaligned ITMX. The oplev servo for
ITMX is now turned off. You can restore ITMX
alignment by running "restore". |
|
|
11810
|
Wed Nov 25 16:40:32 2015 |
yutaro | Update | LSC | round trip loss of Y arm | I measured round trip loss of Y arm. The
alignment of relevant mirrors was set ideal
with dithering (no offset). |
|
|
11813
|
Wed Nov 25 22:37:12 2015 |
yutaro | Update | LSC | removal of Gautam's cable in 1Y2 and restoration of POYDC | [yutaro, Koji]
We disconnected the cable that
was connected to CH5 of the whitening filter in |
|
|
11814
|
Wed Nov 25 22:59:42 2015 |
yutaro | Update | LSC | AS table optics realignment | I slightly changed the orientation
of a few mirrors on AS table that
are used to make the AS light get into PDs, |
|
|
11815
|
Wed Nov 25 23:17:34 2015 |
yutaro | Update | LSC | strange behavior of ASDC | [yutaro, Koji]
I noticed that ASDC level changes
depending on the angle of ITMY when trying |
|
|
11816
|
Wed Nov 25 23:34:52 2015 |
yutaro | Update | LSC | round trip loss of Y arm | [yutaro, Koji]
Due to the strange behavior (elog |
|
|
11818
|
Fri Nov 27 03:38:23 2015 |
yutaro | Summary | LSC | round trip loss of Y arm | Tonight I measured "loss map"
of ETMY. The method to calculate round trip
loss is same as written in elog |
|
|
11819
|
Fri Nov 27 22:20:24 2015 |
yutaro | Update | LSC | round trip loss of Y arm | Here, I upload data I took last night,
including the power of reflected power (locked/misaligned)
and transmitted power for each point (attachement |
|
|
11820
|
Sat Nov 28 11:46:40 2015 |
yutaro | Update | LSC | possible error source of loss map measurement | I found that TRY level degraded and the
beam shape seen with CCD camera at AS port
was splitted when the beam spot on ETMY was |
|
|
11823
|
Mon Nov 30 10:41:45 2015 |
yutaro | Update | LSC | Does a baffle in front of ETMY have effect on loss map measurement? | It might have, so I think
I need to estimate shift of beam spot
more preciely. |
|
|
11824
|
Mon Nov 30 12:19:38 2015 |
yutaro | Update | Computer Scripts / Programs | image capture | On VIDEO.adl, Image Capture and Video Capture
did not seem to work and gave me some errors,
so I fixed following two things: |
|
|
11828
|
Mon Nov 30 17:17:30 2015 |
yutaro | Update | LSC | Does a baffle in front of ETMY have effect on loss map measurement? | With captured images of ETMYF, I measured
the shift of the beam spot on ETMY.
The conclusions are: |
|
|
11831
|
Tue Dec 1 11:26:23 2015 |
yutaro | Update | Optical Levers | Calibration of oplevs for ITMX/ETMX | With the same method as reported in elog
11785, I calibrated oplevs for ITMX/ETMX. |
|
|
11838
|
Wed Dec 2 15:52:28 2015 |
yutaro | Update | LSC | restoration of POXDC | I disconnected the |
|
|
11839
|
Wed Dec 2 17:14:33 2015 |
yutaro | Update | LSC | Beam on POX11 is possibly not centered well | I checked how POXDC level changes when
the angle of ITMX is varied. ETMX was misaligned.
Then I found that in YAW direction |
|
|
11843
|
Thu Dec 3 10:05:07 2015 |
yutaro | Update | Optical Levers | Calibration of oplevs for ITMX/ETMX | I updated the figures. I think it's
easier to read now. |
|
|
11845
|
Thu Dec 3 19:10:28 2015 |
yutaro | Update | LSC | XARM lock with ITMX actuated and related change on ASS | To avoid the strange kicking of ETMX, I
locked XARM with ITMX actuated instead of
ETMX so that I changed elements of C1LSC_OUTPUT_MTRX; |
|
|
11846
|
Fri Dec 4 10:18:33 2015 |
yutaro | Update | ASS | Offset in the dither loop of XARM vs beam spot shift on ETMX | As I did for YARM (elog
11779), I measured the relation between
offsets added just after the demodulation |
|
|
11847
|
Fri Dec 4 12:33:52 2015 |
yutaro | Update | LSC | Beam on POX11 is possibly not centered well | To focus POX beam on POX11 PD, I added
an iris and a lens before POX11 PD as you
can see in Attachment 1. |
|
|
11850
|
Fri Dec 4 23:02:13 2015 |
yutaro | Update | LSC | Beam on POX11 is possibly not centered well | [yutaro, Koji]
Now, the beam on POX11 PD is well
centered and well focused. |
|
|
11851
|
Sat Dec 5 12:02:25 2015 |
yutaro | HowTo | Cameras | When image capture does not work... | Today image capture did not work again,
though it had worked 3 days before. I also
found that red indicator light on the |
|
|
11853
|
Sat Dec 5 21:57:32 2015 |
yutaro | HowTo | Cameras | When image capture does not work... | I don't know if just running "modprobe"
will work or not, because I didn't try
it... When the same problem happens |
|
|
11855
|
Mon Dec 7 10:40:09 2015 |
yutaro | Update | Computer Scripts / Programs | Added 1 line to UNFREEZE_DITHER.py | I added 1 line to one of the ASS scripts,
UNFREEZE_DITHER.py like this:
L29> ez.cawrite('C1:ASS-'+dof+'_GAIN', |
|
|
11857
|
Mon Dec 7 11:11:25 2015 |
yutaro | Summary | LSC | round trip loss of X arm | On the day before yesterday and in this
morning, I measured loss map of ETMX. I reported
the method I used to change the beam spot |
|
|
11860
|
Mon Dec 7 15:56:35 2015 |
yutaro | Update | LSC | XARM lock with ITMX actuated and related change on ASS | I changed the snapshot file for ASS, /opt/rtcds/caltech/c1/scripts/ASS_DITHER_ON.snap
as follows: |
|
|
11861
|
Tue Dec 8 11:24:45 2015 |
yutaro | Summary | Computer Scripts / Programs | Scripts for loss map measurement | Here I explain usage of my scripts
for loss map measurement. There are 7 script
files in a same directory /opt/rtcds/caltech/c1/scripts/lossmap_scripts. With |
|
|
11864
|
Tue Dec 8 15:57:16 2015 |
yutaro | Summary | LSC | Power recycling gain estimation from arm loss measurement | I estimated power recycling gain with the
results of arm loss measurement.
From elog |
|
|
11870
|
Thu Dec 10 12:33:04 2015 |
yutaro | Update | LSC | strange behavior of ASDC | I did additional tests for the strange
behavior of ASCD. ETMY, ETMX and ITMY were
misaligned so that only light reflected by |
|
|
11871
|
Thu Dec 10 19:53:22 2015 |
yutaro | Update | LSC | strange behavior of ASDC | To check if the strange behavior of ASDC
is caused by SR2/SR3 or not, I did the following
measurement: |
|
|
11872
|
Fri Dec 11 09:35:44 2015 |
yutaro | Update | LSC | Power recycling gain estimation from arm loss measurement | I took PR3 AR reflectivity and calculated
PRG (PR3 is flipped and so AR surface is
inside PRC). |
|
|
11874
|
Fri Dec 11 15:37:50 2015 |
yutaro | Update | LSC | Power recycling gain estimation from arm loss measurement | Attached is the plot of relation between
the average arm round trip loss and
power recycling gain. 2 % loss due to PR3 |
|
|
11875
|
Fri Dec 11 16:16:36 2015 |
yutaro | Update | Optical Levers | Calibration of oplevs for ITMX/ETMX | Based on calibration measurement I have
done (elog
11785, 11831), I |
|
|
3778
|
Mon Oct 25 20:20:59 2010 |
yuta, Joe | Update | CDS | DAQ channel number etc | [U][B]Summary:[/B][/U]
We split the old SDSEN filters to SDSEN,
SDSIDE, SDCOIL last week.
|
|
|
3622
|
Wed Sep 29 16:56:36 2010 |
yuta | Update | VAC | 2 doors opened | (Steve, Koji, Joe, Kiwamu, Yuta)
Background:
The vent was started on Monday, |
|
|
3623
|
Wed Sep 29 18:28:32 2010 |
yuta | Update | Computers | aldabella connects to the wireless network | Background:
We need laptops that connect
to the wireless network to use them in the |
|
|
3627
|
Thu Sep 30 14:09:33 2010 |
yuta | Update | Computers | mariabella connects to the wireless network | Background:
We need laptops that connect
to the wireless network to use them in the |
|
|
3630
|
Thu Sep 30 18:51:50 2010 |
yuta | Update | Computers | setting up aldabella and mariabella | (Kiwamu, Yuta)
Background: |
|